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E8500 OC help

post #1 of 7
Thread Starter 
So few weeks ago I tried to overclock my E8500 alittle. Everything was fine till I put it on 400 FSB. It started freezing and crashing - later on I found out that one of the RAM sticks was broken.
What could I have done wrong? Could the RAM be the problem? is Apacer bad manufacturer? Or did I not give something enough volts?
As much as I've read tho noone has done anything more than this in BIOS

BIOS settings:
CPU Clock Ratio ..........................: 9
Fine CPU Clock Ratio.....................: .5
CPU Frequency ...........................: 3.80GHZ (9.5 X 400 FSB)


Clock Chip Control
Standard Clock Control
CPU Host Clock Control..................: [Enabled]
CPU Host Frequency (Mhz) ............: 400Mhz
PCI Express Frequency (Mhz) .........:100

DRAM Performance Control
Performance Enhance...................: [STANDARD]
(G)MCH Frequency Latch...............: [333]
System Memory Multiplier ..............: 2.00B
Memory Frequency (Mhz) ..............: 800MHz (2.00 X 400 FSB)

CPU Vcore….……….........................: 1.31
Everything else was left AUTO

RAM - Apacer PC2 - 6400 2x2GB
CPU - E8500 E0 stepping
post #2 of 7
Did you troubleshoot your memory modules while your cpu was OC'ed? If so, your findings could be suspect. I'm my experience at or around 3.8GHz an E8500 will need more vcore voltage to remain stable and OC further. My E8500 will run stable at 3.8GHz on stock volts but I have worked with E8400's that needed more volts way before getting that far.
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post #3 of 7
Thread Starter 
Well, I doubt that the vCore was undervolted. 1.31 should be plenty for 3.8Ghz. I actually tried more than 1.31 too - that didn't change anything.
What about NB and VTT? I left them at AUTO - as everyone @ 3.8Ghz have done.
Why would the Memory stick brake though?
post #4 of 7
Ah I see you were at 1.31 OK. Push the VTT and then NB one at a time and find if that gets you stable. Apacer is supposedly made by ASUS and PCB for other RAM Mfgs are from Apacer so the RAM should be of good quality. Try to relax your memory timings as well to get stable. How do you mean "Broken"?
Edited by Hexusdfx - 10/9/11 at 12:20am
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post #5 of 7
Thread Starter 
Well how can I start to get it stable if the RAM brakes before.
As soon as I went on 400 FSB I started getting freezes and some BSOD's while under load. Later on found that one RAM stick was broken - http://www.upload.ee/image/1718562/2...6_17.21.01.jpg
post #6 of 7
Quote:
Originally Posted by Crusher112 View Post
Well, I doubt that the vCore was undervolted. 1.31 should be plenty for 3.8Ghz. I actually tried more than 1.31 too - that didn't change anything.
What about NB and VTT? I left them at AUTO - as everyone @ 3.8Ghz have done.
Why would the Memory stick brake though?
You can't just make rules by what "everyone else" has done. Each setup is going to be different. You shouldn't have anything at "auto", you should know the default, and try raising them and retesting. NB may likely need to be set manually, bumped up from stock. VTT just set to 1.25 for now.
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post #7 of 7
The RAM is running at 400MHz (800MHz), and since that is what it rated for, that should all but eliminate the RAM as a variable (unless it is unstable/faulty to begin with).

All CPU's are different, but given the stepping, for now, I'm going to presume that's enough voltage for that clock speed. VTT (FSB Termination) likely shouldn't need touched, as mine stays fine even at the default of 1.15V, and they generally don't need messed with until high FSB speeds, but setting it to 1.25V won't hurt it.

I don't know what board you have, but your image indicates it's a P45 chipset. You can try loosening the FSB Strap to 400MHz, and well as increasing voltage for the Northbridge a few steps.
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