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Thread: Memory Bandwidth Impossible As Standard?




  1. #1
    Join Date
    Sep 2008
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    Default Memory Bandwidth Impossible As Standard?

    OK, here's the question:

    Is it possible to get memory running at anywhere near the advertised bandwidth without changing the standard FSB and multiplier?

    i.e. PC8500 memory is giving me around 7200MB/s transfer rate.

    The only way I've seen if give anywhere near to 8500MB/s is to increase the FSB of the motherboard and lower the multiplier.

    Any help on the matter would be appreciated!

    EP35-DS3L, Q6600 with 2 x 1GB Geil 1066.

    Thanks.

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Memory Bandwidth Impossible As Standard?

    Well that would be the easy way to do it. But yes, you can tighten certain timings and things will speed up.

    And just so you know rated ram speeds are Theoretical and not actual Given for sure amounts. >>>
    http://forums.tweaktown.com/f69/1-1-...27/#post262359

    What are you testing with anyway, and is that read, write, or copy rate?

    Post me a link to your ram, and then fill this in and I will advise >>>>

    This is Just a template I use to ask people their settings, pay no attention to the numbers in it, replace with yours

    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [8]
    Fine Clock Ratio ____________[0.5]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [450]
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [2.00]
    DRAM Timing Selectable_______ SPD __ [Manual]

    Performance Enhance = [Standard]

    CAS Latency Time________________ ?
    Dram RAS# to CAS# Delay_________ ?
    Dram RAS# Precharge Delay_______?
    Precharge Delay (tRAS)__________ ?

    ACT to ACT Delay (tRRD)_________ ?
    Rank Write to READ Delay________ ?
    Write to Precharge Delay_________ ?
    Refresh to ACT Delay______________ ?
    Read to Precharge Delay__________ ?
    Static tRead Value_______________ 1-31
    Static tRead Phase Adjust________ [Auto]

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.300V]
    PCI-E OverVoltage Control_ [+0.1V]
    FSB OverVoltage Control___ [+0.1V]
    (G)MCH OverVoltage Control [+0.1V]
    CPU Voltage Control_______ [1.25]

    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) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Disabled]

    Integrated Peripherals
    Legacy USB Storage Detect___________________[Disabled] *Note* Must be enabled to flash from USB

  3. #3

    Default Re: Memory Bandwidth Impossible As Standard?

    Quote Originally Posted by s-comps View Post
    OK, here's the question:

    Is it possible to get memory running at anywhere near the advertised bandwidth without changing the standard FSB and multiplier?

    i.e. PC8500 memory is giving me around 7200MB/s transfer rate.

    The only way I've seen if give anywhere near to 8500MB/s is to increase the FSB of the motherboard and lower the multiplier.

    Any help on the matter would be appreciated!

    EP35-DS3L, Q6600 with 2 x 1GB Geil 1066.

    Thanks.
    How did you measure that bandwidth? MemTest86+, Everest or...?
    GA-Z97-D3H Windows Pro 8.1
    i5-4690K + Corsair H90
    Sapphire Radeon R7 240
    16GB (2x8GB) DDR3 Corsair Vengeance Pro 2400MHz PC3 19200
    Corsair CX750M
    Samsung SSD 840 EVO 500 GB

    Sharkoon VS-3V tower

  4. Default Re: Memory Bandwidth Impossible As Standard?

    I get the same Everest numbers running at stock speeds. Even higher speed when Performance Enhancement is on EXTREME and R.G.B. on TURBO.

    All DDR21066 PC2 8500 modules are boxed as DDR2 800 PC2 6400 programmed into the SPD chip. The MB then sets the speed to 800Mhz via the SPD chip when you first boot up a new build. If just upgrading memory the MB sets to 1066Mhz.

    The 8500+ MB/s is attainable only when you overclock your system.

    With my fastest overclock yet I've attained 9,500+ MB/s Read, 9,000+ MB/s Write and 8,500+ Copy speeds. My host was clocked at 540Mhz, CPU at 3.2Ghz(6 x 540Mhz) and memory was at 1080Mhz.
    GA P35 DQ6 rev. 1.0, 2x2GB Mushkin XP2 Ascents, 2x2GB Mushkin XP2's DDR2-1066 PC2-8500, Intel Core 2 DUO E8600, 3.33Ghz with Gigabyte CPU Cooler, PNY GeForce 8800 GTS, Antec 900 Gaming Case and Antec True Power Trio 650w PSU, Hauppauge HVR 1600 TV Tuner, old Sony CD/RW that still kicks butt, Sony external DVD, Smart Card Reader, 4 Western Digital Caviar HDD's: 80Gb, 120Gb(usb,external, swap), 160Gb, 250Gb and 320Gb.

    Running it all with Windows XP Pro SP3, Perry Mason and Della Street. Paul Drake's out on assignment. He's helping me locate 64-bit drivers for XP Pro x64 Edition that I'm working with now.


  5. #5
    Join Date
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    Default Re: Memory Bandwidth Impossible As Standard?

    Memory is:

    GeIL 2GB (2x1GB) PC2-8500C5 1066MHz Black Dragon EVO ONE DDR2 Dual Channel Kit (GE22GB1066C5DC)

    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [9]
    Fine Clock Ratio ____________[N/A]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [266]
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [4.00~]
    DRAM Timing Selectable_______ SPD __ [Manual]

    Performance Enhance = [Turbo]

    CAS Latency Time________________ 5
    Dram RAS# to CAS# Delay_________ 5
    Dram RAS# Precharge Delay_______5
    Precharge Delay (tRAS)__________ 15

    ACT to ACT Delay (tRRD)_________ 3
    Rank Write to READ Delay________ 3
    Write to Precharge Delay_________ 6
    Refresh to ACT Delay______________ 42
    Read to Precharge Delay__________ 3
    Static tRead Value_______________ 4
    Static tRead Phase Adjust________ [Auto]

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.300V]
    PCI-E OverVoltage Control_ [+0.1V]
    FSB OverVoltage Control___ [+0.1V]
    (G)MCH OverVoltage Control [+0.1V]
    CPU Voltage Control_______ [1.35]

    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled]
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: [N/A]
    x C4/C4E State Support..................: [N/A]
    CPU Thermal Monitor 2(TM2) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Disabled]

    Integrated Peripherals
    Legacy USB Storage Detect___________________[Disabled] *Note* Must be enabled to flash from USB

    Benchmarks from latest Everest Ultimate:

    R) 7390MB/s
    W) 4862MB/s
    C) 5495MB/s
    L) 67.7ns

  6. Default Re: Memory Bandwidth Impossible As Standard?

    Those are pretty good numbers for stock speeds.

    I see you've tuned your Refresh to ACT Delay down to 4.

    That's about the highest Everest numbers that you're gonna get with no overclocking unless you put Performance Enhancement on EXTREME and R.G.B on TURBO.

    If you decide to adjust to those 2 above options you should put Refresh to ACT Delay on 52 initially. Both of those options will tighten up the sub-timings(even the ones you can't) a little bit more and still pass with MemTest86+, plus, as a result, your Everest numbers will increase at least another 250~300 MB/s (and that aint hay).
    GA P35 DQ6 rev. 1.0, 2x2GB Mushkin XP2 Ascents, 2x2GB Mushkin XP2's DDR2-1066 PC2-8500, Intel Core 2 DUO E8600, 3.33Ghz with Gigabyte CPU Cooler, PNY GeForce 8800 GTS, Antec 900 Gaming Case and Antec True Power Trio 650w PSU, Hauppauge HVR 1600 TV Tuner, old Sony CD/RW that still kicks butt, Sony external DVD, Smart Card Reader, 4 Western Digital Caviar HDD's: 80Gb, 120Gb(usb,external, swap), 160Gb, 250Gb and 320Gb.

    Running it all with Windows XP Pro SP3, Perry Mason and Della Street. Paul Drake's out on assignment. He's helping me locate 64-bit drivers for XP Pro x64 Edition that I'm working with now.


  7. #7
    Join Date
    Sep 2008
    Location
    Canberra, Australia
    Posts
    206

    Default Re: Memory Bandwidth Impossible As Standard?

    i've just got one question... how do you guys get such high read numbers? i get 8238MB/s read, 9826MB/s write and 8962MB/s copy (just the last results)... why does everyone seem to get such high read speeds and such terrible write and copy speeds... it cant be just my timings based on that great a difference
    NZXT Lexa BlackLine Case with Red LEDs
    Corsair TX-750 Modular PSU
    Gigabyte EP45-DS3P (BIOS F7)
    Intel Core 2 Quad Q9300 @ 3.73GHz (downclocked for the summer )
    OCZ Vendetta 2 CPU Heatsink
    2x 2GB Kingston HyperX RAM PC2-6400 @ 996MHz (4-5-5-15)
    3x Seagate Barracuda 7200.11 500GB HDD in RAID5
    2x HIS Radeon HD 4850 @ 745/1090 in CrossFireX
    2x ThermalTake DuOrb GPU Heatsink
    D-Link Super G PCI WLAN Adapter
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    Creative X-Fi XtremeGamer Fatal1ty Pro
    2x 22" LG W2252TQ-PF Widescreen LCD Monitor (YAY!! Finally got the second one!!)

  8. Default Re: Memory Bandwidth Impossible As Standard?

    Who knows. Depends on hardware set-ups I reckon.

    I know if I OC my system a certain way my write speed is higher than my read and if OC'd another way my Copy speed is higher.

    LOL I dunno man....it's goofy.

    If I'm OC'd and I'm back in Windows messing around with MemSet I get even more goofy azz differences.
    Last edited by DavidDavisLeeSomething; 10-09-2008 at 09:55 PM.
    GA P35 DQ6 rev. 1.0, 2x2GB Mushkin XP2 Ascents, 2x2GB Mushkin XP2's DDR2-1066 PC2-8500, Intel Core 2 DUO E8600, 3.33Ghz with Gigabyte CPU Cooler, PNY GeForce 8800 GTS, Antec 900 Gaming Case and Antec True Power Trio 650w PSU, Hauppauge HVR 1600 TV Tuner, old Sony CD/RW that still kicks butt, Sony external DVD, Smart Card Reader, 4 Western Digital Caviar HDD's: 80Gb, 120Gb(usb,external, swap), 160Gb, 250Gb and 320Gb.

    Running it all with Windows XP Pro SP3, Perry Mason and Della Street. Paul Drake's out on assignment. He's helping me locate 64-bit drivers for XP Pro x64 Edition that I'm working with now.


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