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Memory vs FSB problem Corsair Vengeance

post #1 of 6
Thread Starter 
HI ! I have a strange problem with my new memory "CMZ8GX3M2A1600C9B" Corsair 8GB (KIT) DDR3 1600MHz/CL9. It's seems it doesn't play nice with higher fsb on my M4A89GTD PRO. RIght now im using an 1055T @ 3.9GHZ , CPU/NB 3000 at 300FSB. That overclock is stable with my old mem kit Corsair 2x2GB XMS1600C9 using "1600". However now it will not even boot at that FSB even if i try to adjust timings / frequency / voltages or try with 1 stick etc.. I have checked the memory at stock speed 200FSB and it passed memtest so they seems to be okey. I have managed to boot at 295FSB but there are tons of errors but the more i drop the FSB its seems to stabilize more. At 286 i haven't got any error yet but i havent try more than 1 hour so far but im wondering why it won't work at 300FSB when the old kit works at that speed. I have tried with different combinations with the CPU/NB aswell with no luck and CPU speed aswell. Could it be that the board it self can't handle 4gb modules at higher FSB or do need i change some other voltages ? Any help / tips would be great ,, // Rob
post #2 of 6
It can be a lot of things. The CPU IMC works harder with 4 GB. DIMMs than with 2 GB. DIMMs as it has twice the cells to read/write to in the same amount of time. It could also be the DIMMs themselves or the mobo. Different ICs are used to produce the DIMMs and there are 8-9 suppliers so there can be considerable difference in overclockability from DIMM to DIMM.
post #3 of 6
Thread Starter 
Yes i have thought about the CPU IMC but even if i drop that one and the memory to like 1200mhz i still can't boot at 300FSB so it must be the mobo probably i think. I tried a pair of Ripjaws aswell with the same result. Anyway I will try a few more changes otherwise i can always back down the FSB a bit and work it from there.
post #4 of 6
I have the same Kit and same CPU and im having issues getting my Ram at a good Frequency. My old Kingston VALUE used to handle it.Im so dissapointed buying a product that they market for overclockers.Any tips?
S74R SL4Y3R
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S74R SL4Y3R
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 3770 Gigabyte z77x -UD3H PNY GTX 770 OC 8 GB Vengeance 1600Mhz @ 1866 
Hard DriveHard DriveHard DriveCooling
Samsung 840 120 GB  60 GB Corsair Force 3  500 GB Seagate Barracuda Corsair H60 
OSMonitorMonitorPower
Windows 10 LG 22" LG 55LM6700 55" Coolermaster GXII 650 
Case
Lancool K62 
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post #5 of 6

 If you set the FSB too high but don't set the RAM manually it will overclock the RAM too high. Try setting the RAM frequency manually to 1333.


Edited by Lifeshield - 12/25/11 at 3:47pm
War Machine
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War Machine
(18 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 3570k Asus Z77 Sabertooth MSI GTX 770 2GB OC  Corsair Vengeance 2x4gb  
Hard DriveHard DriveOptical DriveCooling
MTD 500gb Sata II HDD Seagate Barracuda 500gb Sata II HDD Samsung (S222A) DVD +/-RW 22x Dual Layer Corsair H80i 
OSMonitorKeyboardPower
Windows 7 64bit Home Premium Acer GD245HQ Microsoft Sidewinder X4 Corsair TX850W  
CaseMouseMouse PadAudio
Antec 900 Razer Naga Custom Skyrim Mousemat Eltax Monitor III Speakers 
AudioOther
Sherwood AX4103 Amplifier Microsoft Xbox 360 Control Pad (Black) 
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post #6 of 6
Quote:
Originally Posted by sl4y3r View Post

I have the same Kit and same CPU and im having issues getting my Ram at a good Frequency. My old Kingston VALUE used to handle it.Im so dissapointed buying a product that they market for overclockers.Any tips?

When it comes to OC'ing your CPU IMC, mobo and RAM all need to play nice. The RAM might be fine but the mobo or IMC may not be able to run 8 GB. RAM OC'ed without errors? Your CPU has a default 1333 MHz. frequency so anything above that is a matter of luck. If you haven't tried slowing the latencies or bumping the voltage slightly, you can give that a try.

http://www.hardwaresecrets.com/article/Understanding-RAM-Timings/26
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