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Thread: RAM / CPU FSB limiting maybe?




  1. #1
    Join Date
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    Default RAM / CPU FSB limiting maybe?

    Hi,

    Possibly a little basic for these forums but this system has been built from a couple of spares so isn't great on that score. My ram is only 800MHz rated I believe so this will limit my overclocking possibilites. I would like to hit around 3.8 on this CPU if possible but is there a point with this ram?

    I'm going to try and match the settings and get any other info as per these posts, apologies I don't have it now.
    http://forums.tweaktown.com/295784-post5.html
    http://forums.tweaktown.com/294887-post50.html

  2. #2

    Default Re: RAM / CPU FSB limiting maybe?

    It depends if your RAM will do 900mhz or not. If it will do that, you can get 4ghz.

    Reduce your cpu speed and test on a high memory multi such as 4.00B or 3.20B to see how far your ram will go first.
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  3. #3
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    Default Re: RAM / CPU FSB limiting maybe?

    Thanks, sorry I didn't post back before now.

    Being rather new at this I'm running Intel Burn Test v1.92 5 times at 1/4 at the moment. I put it up to 4GHz as you said it may be possible and it seems ok at the moment. I'm writing this as it is testing so if I cut off then ...

    ok, poor joke.

    Anyway, I changed the RAM to 5.5.5.18 for the moment but I believe it is still running at 400 so isn't overclocked? Is that possible with a 1:1?
    I've changed the PCI Express to 100 and MCH Core to 1.20
    Will try and post a template thing when I can. Still running on revision 3 of the bios though as I haven't updated to 9 yet (not sure there is a reason to?)

  4. #4
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    Default Re: RAM / CPU FSB limiting maybe?

    Apologies again for the delay:
    Code:
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster...................Fast
    CPU Clock Ratio..............................10x
     
    Clock Chip Control 
    CPU Host Clock Control....................Enabled
    CPU Host Frequency (Mhz)...............400Mhz
    PCI Express Frequency (Mhz)............100
    C.I.A.2..........................................Disabled
     
    DRAM Performance Control
    Performance Enhance......................Turbo
    Extreme Memory Profile (X.M.P.)........Disabled
    (G)MCH Frequency Latch.................400
    System Memory Multiplier.................2.00D
    Memory Frequency (Mhz).................800
    DRAM Timing Selectable...................Manual
     
    Standard Timing Control
    CAS Latency Time..........................4
    tRCD............................................4
    tRP'.............................................4
    tRAS...........................................12
     
    MCH/ICH
    MCH Core.....................................1.20
     
    DRAM
    DRAM Voltage...............................2.10
     
    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)..........Enabled
    CPU EIST Function.......................Disabled
    Virtualization Technology...............Enabled
     
    Integrated Peripherals
    Legacy USB Storage Detect...........Disabled
    I changed the ram back to the 444 12 timings but I'm a little worried about the 1600FSB for the chip now? Thoughts anyone?
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  5. #5
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    Default Re: RAM / CPU FSB limiting maybe?

    Why are you worried about running 400MHz FSB? It realy isn't a problem. You're not using excessive northbridge voltages, so you're fine. I'm running a 486 MHz (1944MHz QDR) FSB with no trouble. 550MHz + on dual cores isn't out of the realms of possibility.

    Your Corsair XMS will likely be good until DDR-900 (450 FSB) at 4-4-4-12, and would go on to at least 1066 at 5-5-5-15 with 2.1-2.2v. If you do want to test the limits of your RAM, then you can drop the CPU multiplier to keep the CPU between 3.8-4GHz while continuing to increase FSB.

    You may find it more difficult to reach higher FSB and / or memory speeds with 8GB, YMMV.
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  6. #6
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    Default Re: RAM / CPU FSB limiting maybe?

    We can better assist you if you provide all of the following bios settings.

    Fill in the generic bios template with your bios settings.
    --> Fill in Auto where appropriate.

    Code:
    Motherboard: Model, Rev#:
    Cpu: Model #
    Ram: Brand, Model/Part#, Link to your ram's specs
    Power Supply Unit: Brand, Model#, Wattage
    
    note: replace all ?? with the value displayed in your bios.
    ----> where appropriate replace Auto settings with manually set values
     
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : [Auto] <--- FAST is OK
    CPU Clock Ratio ---------------------- : [##]
    Fine CPU Clock Ratio ----------------- : [0.0] < ignore if not available
    CPU Frequency ---------------------: ####
    
    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Enabled]
    CPU Host Frequency (Mhz) --------------: [Mhz]
    PCI Express Frequency (Mhz) ---------- : [Auto] <--- 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) ------------------ : <<<
    MCH Clock Skew (ps) ------------------ : <<<
    
    DRAM Performance Control
    Performance Enhance ------------------- : [Turbo] <--- set to DISABLED when overclocking
    Extreme Memory Profile --- (X.M.P.) --- : [Disabled] <--- Leave this Disabled
    (G)MCH Frequency Latch ---------------- : [Auto]
    System Memory Multiplier -------------- : [Auto]
    Memory Frequency (Mhz) -----------: ####
    DRAM Timing Selectable ---------------- : [Auto] <-- set to MANUAL for overclocking
    
    Standard Timing Control
    CAS Latency Time -------- ?? ---------- : [Auto]
    tRCD  ------------------- ?? ---------- : [Auto]
    tRP --------------------- ?? ---------- : [Auto]
    tRAS  ------------------- ?? ---------- : [Auto]
    
    Advanced Timing Control
    tRRD  ------------------- ?? ---------- : [Auto]
    tWTR  ------------------- ?? ---------- : [Auto]
    tWR --------------------- ?? ---------- : [Auto]
    tRFC  ------------------- ?? ---------- : [Auto]
    tRTP  ------------------- ?? ---------- : [Auto]
    Command Rate (CMD) -------------------- : [Auto] <--- Auto or 0 is OK
    
    Driving Strength Profiles
    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
    
    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
    
    Motherboard Voltage Control
    CPU
    CPU Vcore --------------- 1.?????  ---- : [Auto] <--- set to the 1.????? value
    
    CPU Termination --------- 1.200V* ----- : [Auto] <--- set to the value to the left (Auto over-volts this too much when overclocking) Auto is OK if not overclocking
    CPU PLL ----------------- 1.500V* ----- : [Auto] <--- set to the value to the left (Auto over-volts this too much when overclocking) Auto is OK if not overclocking
    
    CPU Reference ----------- 0.755V* ----- : [Auto] <--- Auto Will set this correctly
    CPU Reference2 ---------- 0.800V* ----- : [Auto] <--- Auto Will set this correctly
    
    MCH/ICH
    MCH Core ---------------- 1.100V ------- : [Auto] <--- set to 1.20 for 2x2GB ram (1.24 - 1.26, or 1.05 might be needed)
    MCH Reference ----------- 0.800V ------- : [Auto]
    MCH/DRAM Ref ------------ 0.900V  ------ : [Auto]
    ICH I/O ----------------- 1.500V ------- : [Auto] <--- set to the value to the left
    ICH Core ---------------- 1.100V ------- : [Auto] <--- set to the value to the left
    DRAM
    DRAM Voltage ------------ 1.800V ------- : [Auto] <--- set to the max rated ram voltage (for most memory)
    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) ------------ : [Enabled]
    CPU EIST Function  --------------------- : [Disabled]
    Virtualization Technology -------------- : [Disabled] <--- Enabled if you use Vmware/Virtual PC
    
    Integrated Peripherals
    Legacy USB Storage Detect  ------------- : [Enabled] <--- set to Disabled when overclocking (this must be enabled to flash or boot from a USB drive)
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  7. #7
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    Default Re: RAM / CPU FSB limiting maybe?

    Psycho101, Just because the chip was 333. Will try a slightly higher one if it is reasonable to assume it should be ok, thanks for your help

    Sorry profJim, will add the other info, it was just the defaults so didn't think to add them. Thanks

  8. #8
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    Default Re: RAM / CPU FSB limiting maybe?

    The only way to overclock a locked CPU is to raise the FSB. You have no wories in doing so. The board is good up to nearly 600 FSB, and the processor will simply fail to be stable if this is set too high. It won't cause any damage by itself. Indirectly it can cause damage, by running a chip at higher frequencies you increase heat and voltage requirements. The heat and too high of a voltage will put your CPU at risk. Not FSB speed.
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  9. #9
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    Default Re: RAM / CPU FSB limiting maybe?

    Hi,

    Sorry about missing the other bits, I was thinking I was being clever by not writing them down as they were defaults.
    I can change the CPU Clock Ratio if that will help?

    Code:
     
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : FAST
    CPU Clock Ratio ---------------------- : 10x (This can be changed)
    Fine CPU Clock Ratio ----------------- : [0.0]
    CPU Frequency ---------------------: 
     
    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Enabled]
    CPU Host Frequency (Mhz) --------------: [400]
    PCI Express Frequency (Mhz) ---------- : [100]
     
    C.I.A.2 ------------------------------ : [Disabled]
     
    Advanced Clock Control ------- [Press Enter]
    CPU Clock Drive ---------------------- : 800
    PCI Express Clock Drive -------------- : 900
    CPU Clock Skew (ps) ------------------ : 0
    MCH Clock Skew (ps) ------------------ : 0
     
    DRAM Performance Control
    Performance Enhance ------------------- : [Turbo] 
    Extreme Memory Profile --- (X.M.P.) --- : [Disabled]
     
    (G)MCH Frequency Latch ---------------- : [400]
    System Memory Multiplier -------------- : [2.00D]
    Memory Frequency (Mhz) -----------: 800
    DRAM Timing Selectable ---------------- : [MANUAL]
     
    Standard Timing Control
    CAS Latency Time -------- ?? ---------- : [4]
    tRCD  ------------------- ?? ---------- : [4]
    tRP --------------------- ?? ---------- : [4]
    tRAS  ------------------- ?? ---------- : [12]
     
    Advanced Timing Control
    tRRD  ------------------- ?? ---------- : [Auto]
    tWTR  ------------------- ?? ---------- : [Auto]
    tWR --------------------- ?? ---------- : [Auto]
    tRFC  ------------------- ?? ---------- : [Auto]
    tRTP  ------------------- ?? ---------- : [Auto]
    Command Rate (CMD) -------------------- : [Auto]
     
    Driving Strength Profiles
    Driving Strength --------- : Press Enter <--- press ENTER to modify memory sub-timings when overclocking
     
    Channel A
    Static tRead Value ----------- ?? ------ : [Auto]
    tRD Phase0 Adjustment -------- ?? ------ : [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
     
    Channel B
    Static tRead Value ----------- ?? ------ : [Auto]
    tRD Phase0 Adjustment -------- ?? ------ : [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
     
    Motherboard Voltage Control
    CPU
    CPU Vcore --------------- 1.?????  ---- : [Auto]
    CPU Termination --------- 1.200V* ----- : [Auto]
    CPU PLL ----------------- 1.500V* ----- : [Auto]
     
    CPU Reference ----------- 0.755V* ----- : [Auto]
    CPU Reference2 ---------- 0.800V* ----- : [Auto]
     
    MCH/ICH
    MCH Core ---------------- 1.100V ------- : [1.200V]
    MCH Reference ----------- 0.800V ------- : [Auto]
    MCH/DRAM Ref ------------ 0.900V  ------ : [Auto]
    ICH I/O ----------------- 1.500V ------- : [Auto]
    ICH Core ---------------- 1.100V ------- : [Auto]
    DRAM
    DRAM Voltage ------------ 1.800V ------- : [2.100V]
    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) ------------ : [Enabled]
    CPU EIST Function  --------------------- : [Disabled]
    Virtualization Technology -------------- : [Enabled]
     
    Integrated Peripherals
    Legacy USB Storage Detect  ------------- : [Disabled]

  10. #10
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    Default Re: RAM / CPU FSB limiting maybe?

    For easy overclocking it's best to have Clock Ratio (multiplier) set to its maximum initially. If you want to lower it to go for a faster FSB at the same CPU speed later, you can.

    CPU Ratio * FSB speed (real speed, not the QDR figure such as 1333 or 1600) = CPU Frequency.

    For a nice easy 4GHz I would set:

    Code:
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster -------------- : FAST
    CPU Clock Ratio ---------------------- : 10x 
    Fine CPU Clock Ratio ----------------- : [0.0]
    CPU Frequency ---------------------: 
     
    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control --------------- : [Enabled]
    CPU Host Frequency (Mhz) --------------: [400]
    PCI Express Frequency (Mhz) ---------- : [100]
     
    C.I.A.2 ------------------------------ : [Disabled]
     
    Advanced Clock Control ------- [Press Enter]
    CPU Clock Drive ---------------------- : 800
    PCI Express Clock Drive -------------- : 900
    CPU Clock Skew (ps) ------------------ : 0
    MCH Clock Skew (ps) ------------------ : 0
     
    DRAM Performance Control
    Performance Enhance ------------------- : [Standard] <--- Turbo may be OK, test with standard first.
    Extreme Memory Profile --- (X.M.P.) --- : [Disabled]
     
    (G)MCH Frequency Latch ---------------- : [400]
    System Memory Multiplier -------------- : [2.00D]
    Memory Frequency (Mhz) -----------: 800
    DRAM Timing Selectable ---------------- : [MANUAL]
     
    Standard Timing Control
    CAS Latency Time -------- ?? ---------- : [4]
    tRCD  ------------------- ?? ---------- : [4]
    tRP --------------------- ?? ---------- : [4]
    tRAS  ------------------- ?? ---------- : [12]
     
    Advanced Timing Control
    tRRD  ------------------- ?? ---------- : [4]
    tWTR  ------------------- ?? ---------- : [4]
    tWR --------------------- ?? ---------- : [8]
    tRFC  ------------------- ?? ---------- : [68]
    tRTP  ------------------- ?? ---------- : [6]
    Command Rate (CMD) -------------------- : [2]
     
    Driving Strength Profiles
    Driving Strength --------- : 1066 on both channels
     
    Channel A
    Static tRead Value ----------- ?? ------ : [9]
    tRD Phase0 Adjustment -------- ?? ------ : [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
     
    Channel B
    Static tRead Value ----------- ?? ------ : [9]
    tRD Phase0 Adjustment -------- ?? ------ : [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
     
    Motherboard Voltage Control
    CPU
    CPU Vcore --------------- 1.?????  ---- : [1.350]
    CPU Termination --------- 1.200V* ----- : [1.24]
    CPU PLL ----------------- 1.500V* ----- : [1.57]
     
    CPU Reference ----------- 0.755V* ----- : [Auto]
    CPU Reference2 ---------- 0.800V* ----- : [Auto]
     
    MCH/ICH
    MCH Core ---------------- 1.100V ------- : [1.200V] <--- fine up to 1.3v use what you need to be stable, no more.
    MCH Reference ----------- 0.800V ------- : [Auto]
    MCH/DRAM Ref ------------ 0.900V  ------ : [Auto]
    ICH I/O ----------------- 1.500V ------- : [1.57]
    ICH Core ---------------- 1.100V ------- : [1.200]
    DRAM
    DRAM Voltage ------------ 1.800V ------- : [2.100V]
    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) ------------ : [Enabled]
    CPU EIST Function  --------------------- : [Disabled]
    Virtualization Technology -------------- : [Disabled] <-- only needed if you run virtual machines. If you don't know what they are, you don't run them.
     
    Integrated Peripherals
    Legacy USB Storage Detect  ------------- : [Disabled]
    Items I've changed are in bold. The voltage I've specified for the CPU is a safe one that will likely be good for way more CPU speed than 4GHz, so replace this with a value you determine to be correct.

    Memory sub timings are a little loose, but only to be safe and alow you to overclock further. Anything above 440-450 FSB will likely need you to loosen primary timings to 5-5-5-15.

    It's important you get vCore, CPU Termination and PLL off [Auto], as likely the board is giving them more than needed. I wouldn't be surprised if it was putting about 1.4v through your CPU @ 4GHz, which is way over the top.

    More voltage on ICH I/O and ICH core are just for good measure.
    Last edited by Psycho101; 05-15-2009 at 03:57 AM.
    Coolermaster CM 690 II advance Case
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    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
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    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

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