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Thread: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?




  1. #21
    profJim's Avatar
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    Default Re: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?

    Take a quick look/see at my thread where I have all my document files, music files, video files, backups and some system files on my hard drive.
    On my win7 SLI system, I moved all my large video benchmark programs to my hard drive.
    I've also moved the following files or folders to my hard drive:
    • pagefile.sys
    • TEMP folder
    • TMP folder
    • Indexer folder
    • Downloads folder
    • DropBox folders
    • MiniDump folder
    • IE9 and FireFox Cache folders
    • My win7 backups and non-win system images are on the last partition on my hard drive.

    I also have a 3TB external hard drive (that is not connected) for secondary copies for most of these folders.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  2. #22
    rudhawk is offline Junior Member
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    Default Re: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?

    where is the part about the files on different drive - I read through about 5 pages & then jumped to the last. (probably didn't read far enough, huh)
    Gigabyte EP45-UD3R ver 1.1 - Bios ver 12
    Win 7 & XP PRO - multiboot
    Intel 520 series SSD
    ATI HD 4650

  3. #23
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    Default Re: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?

    post #44 in http://forums.tweaktown.com/gigabyte...tml#post383199
    post #47 in http://forums.tweaktown.com/gigabyte...tml#post383860
    post #48 in http://forums.tweaktown.com/gigabyte...tml#post383868
    post #54 in http://forums.tweaktown.com/gigabyte...tml#post384034

    Search the first page (posts #1 - #40) for junction link, which can be used to relocate other folders.
    A web search will provide more information.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  4. #24
    rudhawk is offline Junior Member
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    Default Re: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?

    Got it - Looks good - I thnk I'll steal a couple of your ideas.
    Gigabyte EP45-UD3R ver 1.1 - Bios ver 12
    Win 7 & XP PRO - multiboot
    Intel 520 series SSD
    ATI HD 4650

  5. #25
    profJim's Avatar
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    Default Re: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?

    That's what we're here for.

  6. #26
    rudhawk is offline Junior Member
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    Default Re: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?

    OK - here's latest plus a WEIRD thing. First let me give you some background. This sage started with my clean install on my new SSD. At the same time I installed the other 4 gb of ram. I had been running a little shaky and thought it was the ram. But it started getting unstable and I had to clear CMOS a couple times and then it wouldn't boot. I RMA'd and picked up a Corsair VX430 on sale at Newegg in the interim.

    I was still having trouble booting with the new psu so I pulled the new sticks out, no luck. I thought the bios had gotten corrupted so I downloaded the same "latest" version (which I've been running for 4 yrs?. Reflashed and was able to boot. But I was still getting bsod's - I checked every driver, tested every system & device - FurMark, Memtest86, Prime95, etc, etc. (I also discovered the psu death took out my gpu fan). Everything checked out with flying colors - just all these random bsod's pointing to either device driver or memory - that really narrows it down, huh? I had my fingers crossed the death of the psu hadn't bricked my board.

    Finally, yesterday? I decided it would take less time to do a clean install rather than waste time chasing this wack-a-mole. So, do a wipe of the SSD and move on, simple. Not so fast - I needed an operating system to use Intel's toolkit to wipe it. So I went to my 956P-DS3 in my shop, hooded up the SSD and ran the Intel Erase - not so fast, the drive is secuity locked - ok cycle the power no luck. reboot and hot plug, no - cycle again - nothing. Maybe I need to be running in AHCI (not set up on the DS3). Back to the house, try to reboot (multibboot) my win 7 install on my HDD - (had to do a repair install). Installed toolkit which took forever because that install is corrupted - it still wouldn't work. I found out this is a problem with this series from Intel.

    At 11:00 pm I started downloading PartMagic. This morning I made a bootable usb with PartMagic and was able to get the SSD erased. Then I did a clean install - except here's where it gets really interesting/weird.

    This morning I disconnected the HDD's and setup the bios for the clean install on the SSD. I loaded "Optimized Settings" and then disabled a number of unnecessary items. I decided to just put in my original ram = Patriot Viper spec'd at 2.1v at 4-4-4-12). For 4 years the bios automatically set this ram at 5-5-5-12 even if I bumped the volts to 2.1 so I always left it that way.

    When I looked at my ram settings this time the bios had set the ram volts at 1.8 (that's it always did from day one) and had set the timing at 4-4-4-12!
    It has never done that in 4 years with these sticks - it's always set the timings at 5-5-5-12; even if I increased the volts to 2.1.

    Go figure. Now I'm wondering if the bios version (12) that I originally downloaded from Gigabyte was upgraded at some point but the ver number remained the same. I'm baffled (but happy). Now I'm wondering if this was the problem all along? I would have thought this would have shown within the 7 passes on Memtest86 - but maybe not.

    So now I'm about ready to load in my other two sticks. And get started on this again - soon as I catch my breath.
    Gigabyte EP45-UD3R ver 1.1 - Bios ver 12
    Win 7 & XP PRO - multiboot
    Intel 520 series SSD
    ATI HD 4650

  7. #27
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    Default Re: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?

    There are many file comparison programs that will let you do a binary or CRC comparison on two or more files.
    A web search using: binary file comparison utility OR program will provide links and additional information.

    With both memory kits installed, use the 5-5-5-12 settings and test with higher MCH Core settings if there are stability problems.
    DRAM voltage might need to be increased slightly.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  8. #28
    rudhawk is offline Junior Member
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    Default Re: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?

    Today I'm running stable with 2 sticks (bios set automatically @ 1.8v & 4-4-4-12). (This is with the (2X2 gb) PDC22G6400LLK spec'd at 2.1 & 4-4-4-12. in slots 1&3)
    This is with the bios choosing the settings. I put the other 2 sticks in (PDC24G6400ELK spec'd at 1.9v - 5-5-5-12). The bios set the timing for 8 gb @ 1.8v - 5-5-5-12. I booted no problem so i ran Prime 95 for 15 minutes - no issues.

    So I followed your advice and reset the MHC to 1.16 & bumped the Dram to 2.0v. I'll run Memtest86 tonight.

    Code:
    Motherboard: Model: Rev#: Bios Version:			EP45-UD3R  rev 1.1	Bios ver F12
    Cpu: Model						E8400
    Ram: Brand, Model/Part#, Link to your ram's specs	Patriot:
    							DDR2_1&3	Patriot Viper 4GB (2 x 2GB) DDR2 800			PVS24G6400LLK  2.1v 4-4-4-12
    							DDR2_2&4	Patriot Extreme Performance 4GB (2 x 2GB) DDR2 800 	PDC24G6400ELK  2.0v 5-5-5-12
    Power Supply Unit: Brand, Model#, Wattage		CORSAIR CX550 550W 
    
    note: replace all ?? with the value displayed in your bios.
    ----> Replace "Auto" with manually set values.
    
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : [Auto]
    CPU Clock Ratio ---------------------- : [9X]
    Fine CPU Clock Ratio ----------------- : [0.0] <-- ignore if not available
    CPU Frequency ---------------------: #### <-- this is set by your bios
    
    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Disabled]
    CPU Host Frequency (Mhz) --------------: [333]
    PCI Express Frequency (Mhz) ---------- : [100] <--- Set to 100, never leave this on Auto
    
    C.I.A.2 ------------------------------ : [Disabled]
    
    Advanced Clock Control ------- [Press Enter]
    CPU Clock Drive ---------------------- : [800]
    PCI Express Clock Drive -------------- : [900]
    CPU Clock Skew (ps) ------------------ : [OPS]
    MCH Clock Skew (ps) ------------------ : [OPS]
    
    DRAM Performance Control
    Performance Enhance ------------------- : [STANDARD] <--- set to STANDARD when overclocking
    Extreme Memory Profile --- (X.M.P.) --- : [    ] <--- Leave this Disabled (This disappears with 8 gb installed or the ELK modules)
    (G)MCH Frequency Latch ---------------- : [Auto]
    System Memory Multiplier -------------- : [Auto] <-- this is the setting that you are using
    Memory Frequency (Mhz) ---------------- : [ 800]
    DRAM Timing Selectable ---------------- : [Auto] <-- set to MANUAL for overclocking
    
    Standard Timing Control
    CAS Latency Time -------- 5 ---------- : [Auto]
    tRCD -------------------  5 ---------- : [Auto]
    tRP --------------------- 5 ---------- : [Auto]
    tRAS ------------------- 12 ---------- : [Auto]
    
    Advanced Timing Control
    tRRD -------------------  3 ---------- : [Auto]
    tWTR -------------------  3 ---------- : [Auto]
    tWR --------------------- 6 ---------- : [Auto]
    tRFC ------------------- 52 ---------- : [Auto]
    tRTP -------------------  3 ---------- : [Auto]
    Command Rate (CMD) ------------------- : [   0] <--- Auto or 0 is OK
    
    Driving Strength Profiles		N/A
    Driving Strength --------- : Press Enter <--- press ENTER to modify memory sub-timings when overclocking
    
    Channel A
    Static tRead Value --------------------- : [Auto]
    tRD Phase0 Adjustment ------------------ : [Auto] <-- leave this and below set to AUTO
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto] ps
    Dimm2 Clock Skew Control --------------- : [Auto] ps
     (MY MOBO HAS)	DDR WWRITE TRAINING ---- : [Auto]
      Also my mobo has Channel A Driving Settings - all on [auto]
    
    Channel B
    Static tRead Value --------------------- : [Auto]
    tRD Phase0 Adjustment ------------------ : [Auto] <-- leave this and below set to AUTO
    tRD Phase1 Adjustment ------------------ : [Auto]
    tRD Phase2 Adjustment ------------------ : [Auto]
    tRD Phase3 Adjustment ------------------ : [Auto]
    Trd2rd(Different Rank) ----------------- : [Auto]
    Twr2wr(Different Rank) ----------------- : [Auto]
    Twr2rd(Different Rank) ----------------- : [Auto]
    Trd2wr(Same/Diff Rank) ----------------- : [Auto]
    Dimm1 Clock Skew Control --------------- : [Auto] ps
    Dimm2 Clock Skew Control --------------- : [Auto] ps
     (MY MOBO HAS)	DDR WWRITE TRAINING ---- : [Auto]
      Also my mobo has Channel B Driving Settings - all on [auto]
    
    Motherboard Voltage Control
    CPU
    Voltage Types------------ Normal -------- Current -----
    Load-Line Calibration ----------------- : [Disabled]
    CPU Vcore --------------- 1.250000 ---- : [Auto]
    
    CPU Termination --------- 1.200V* ----- : [Auto]
    CPU PLL ----------------- 1.500V* ----- : [Auto]
    
    CPU Reference ----------- 0.760V* ----- : [Auto]
    CPU Reference2 ---------- ?.???V* ----- : [Auto]  N/A
    
    MCH/ICH
    MCH Core ---------------- 1.100V ------- : [1.16]
    MCH Reference ----------- 0.760V ------- : [Auto]
    MCH/DRAM Ref ------------ 0.900V ------- : [Auto]
    ICH I/O ----------------- 1.500V ------- : [Auto]
    ICH Core ---------------- 1.100V ------- : [Auto]
    DRAM
    DRAM Voltage ------------ 1.800V ------- : [2.00v]
    DRAM Termination -------- 0.900V ------- : [Auto]
    Channel A Reference ----- 0.900V ------- : [Auto]
    Channel B Reference ----- 0.900V ------- : [Auto]
    
    Advanced Settings
    Limit CPUID Max. to 3 ------------------ : [Disabled]
    No-Execute Memory Protect -------------- : [Enabled]
    CPU Enhanced Halt (C1E) ---------------- : [Disabled]
    C2/C2E State Support ------------------- : [Disabled]
    x C4/C4E State Support ----------------- : [Disabled]
    CPU Thermal Monitor 2 (TM2) ------------ : [Disabled]
    CPU EIST Function ---------------------- : [Disabled]
    Virtualization Technology -------------- : [Disabled]
    
    Integrated Peripherals
    Legacy USB Storage Detect ------------- : [Disabled]
     (USB Storage Function)
    Gigabyte EP45-UD3R ver 1.1 - Bios ver 12
    Win 7 & XP PRO - multiboot
    Intel 520 series SSD
    ATI HD 4650

  9. #29
    profJim's Avatar
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    Default Re: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?

    Prime95 errors often don't occur until the test has run for 1 - 3 hours.
    I consider a system to be reasonably stable if Prime95 has no errors after 6 - 8 hours.
    Sometimes Prime95 errors don't occur until after it has run for 12+ hours.

    Memtest86+ is an excellent preliminary test, but Prime95 is a far more demanding stress test.
    I like to run IntelBurn Test (IBT) or LinX for only 5 - 10 loops before running Prime95.
    If IBT or LinX have errors, your system is NOT stable.
    Depending on your cpu cooler, cpu core temperatures will be 60 - 70o (C) or higher.
    With 4 - 8GB of memory, use 2048MB or more memory.
    Each test loop with more memory will take longer to complete when running IBT or LinX.
    I've seen many cases where IBT or LinX run without errors, but Prime95 will have errors within one hour or before it has run for 6 - 12 hours.
    Do not run IBT or Linx for long time periods; short tests only.

    Provide detailed error reports or a screen-shot if there are any errors.
    If there are any Prime95 errors, post a screen-shot that includes: Prime95 windows, Memset SPD and >> tabs, and EasyTune6 Advance/Tuner/Voltages.

    Make sure that round off checking is enabled in Prime95 before starting the test.

    EP45-UD3R - random bsod's  with 8 gb Patriot DDR2 - bios settings?-prime95-round-checking-enabled-png

    Happy testing!
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  10. #30
    profJim's Avatar
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    Default Re: EP45-UD3R - random bsod's with 8 gb Patriot DDR2 - bios settings?

    From the Prime95 tutorial link in my signature:

    Kinds Of Torture Tests

    The torture test window presents you with three ready-made tests and an option to create a custom test. So the obvious question is: which test should you run? The answer depends on what you're trying to do. First let's look at the kinds of tests which are available.

    In case you're interested, "FFT" stands for fast fourier transform. It's used in Prime95 to quickly calculate the square of very large numbers.

    The "Custom" test allows you to create your own test. The "Min FFT size (in K)" and "Max FFT size (in K)" allow you to pick the minimum and maximum size of the FFTs done in the test. The sizes you select are not the amount of memory used by the tests. The size value times 1024 is actually the number of points used in the FFT. Prime95 is not actually capable of doing FFTs of any arbitrary size. It can do only sizes in the following list: 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 448, 512, 640, 768, 896, 1024, 1280, 1536, 1792, 2048, 2560, 3072, 3584, and 4096. When testing, Prime95 cycles through the sizes in the list which fall within the min to max range which you've entered. Prime95 (version 23.8.1 and maybe others) has a bug which causes the program to hang if you enter a range which doesn't include any sizes from the list. Make sure that a custom range always includes at least one size from the list.

    The "Time to run each FFT size (in minutes)" value controls how much time Prime95 spends running FFT tests of a given size. Once it has tested one size for that long, it moves on to the next size. It cycles continuously through the sizes within the min to max range until it gets an error or you stop the test.

    If the "Run FFTs in-place" box is checked, then the results of the FFTs are stored over the FFT points. That basically means that it uses the same RAM area over and over and only uses enough to do the calculations. If the box is unchecked then Prime95 cycles through RAM as it runs through the tests and the total amount of RAM used is the value in "Memory to use (in MB)".

    The "Small FFTs" test uses relatively small FFTs which can fit into the CPU cache. As a result, the small FFT test is the one which accesses your main memory the least but it still makes some memory accesses. Prime95 automatically creates a FFT size range which will fit into the L2 cache of your CPU.

    The "In-place large FFTs" test uses relatively large FFTs which cannot fit into the CPU cache so this test accesses main memory a lot. It only accesses a relatively small amount of main memory because it runs the FFTs in-place so it accesses the same RAM over and over.

    Which Torture Test Should You Run?

    Prime95 can stress test three parts of your computer: the CPU, the motherboard RAM, and the CPU/RAM interface. On an Athlon 64, the motherboard RAM is connected directly to the CPU. So with an Athlon 64, the CPU/RAM interface is a memory controller built into the CPU. On most other CPUs, the RAM is connected to a northbridge chip on the motherboard which is connected to the CPU through the front side bus. So on those CPUs, the CPU/RAM interface is the front side bus. All kinds of Prime95 torture tests stress the CPU. Both the in-place large FFTs test and the blend test also test the CPU/RAM interface while the CPU is under stress. You shouldn't use Prime95 as a RAM test. It's just not as thorough as something like MemTest86. Real memory testers run carefully selected test patterns to maximize the chances of finding a problem and Prime95 doesn't do that. Prime95 is primarly used to find unstable CPUs and to test your CPU/RAM interface while the CPU is under stress.
    - - - - - - - -
    Note: I disagree somewhat with the last paragraph.
    I've run Memtest86+ for 12 hours or longer, only to have Prime95 have errors.

    Memtest86+ is excellent for finding true hardware errors and it will sometimes have errors when some bios settings aren't quite close enough for the system to be stable. The main advantage to running Memtest86+ first, is to help prevent possible file corruption to your boot drive if there are errors. This would not be an issue if everyone had a recent system image of the boot drive that they could quickly restore to the boot partition if data corruption prevents windows from running or causes new BSODs.

    I hope that I haven't confused you with too much information.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


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