Pentium D 805 Overclock Crashing...HELP

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typexero

n00b
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Jan 30, 2007
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I got a Pentium D 805 running at 3.65 GHz perfectly stable. However, whenever I raise the clock to anything above that some games (i.e. NFS Carbon and Madden 07) crash back to the desktop. I ran games like HL2 Episode 1 and the FEAR Expansion at 3.9-4.0 GHz without issue but those two EA games seem to dislike the high clockspeed. The vCore is 1.6 volts (tried higher), all other voltages manually set to default. I also have another problem. When I run my computer at even 3.65 GHz the memory (Corsair XMS 2) does not like to be set to 4:4:4:12 even though I turn up the ram voltage to 2.1. What I mean is that programs randomly crash back to desktop under heavy load. Someone please help me understand what the heck is going on...I have built many computers in the past but have not been an avid overclocker. Thanks.
 
can you be more specific? What ratio are you using for memory? Have you tested small fft? blend? large? memtest?
 
Thanks for the replies. My memory timings are 5-5-5-14 to ensure stability. My temps are: CPU: 45 C idle and 65 C load @ 3.9 GHz Motherboard: 46 C load. When I run Prime95 I have not received any errors with two instances...1 Blend and 1 In-Place large FFT. It is only when I run Madden 07 and NFS: Carbon that the games crash back to desktop.
 
Update: I used to be able to run games at 4.0 GHz but now I cannot even boot into windows without BSOD...3.9 GHz has the same problem @1.615 vCore.
 
If you drop the speed to around 3.2Ghz or so, do the games crash to the desktop?
 
Everything runs perfectly at 3.65 GHz. I tried Memtest earlier today and the computer crashed towards the end of the test @ 3.8 GHz. The strange thing is that the memory was only running at 780 MHz which is below its rated speed.
 
Looks like you've figured out at least one of the culprits.

I've had my overclock be able to pass orthos small fft for 27 hours, blend for 24 hours, and yet have cs crash to desktop after a few games on a consistent basis. 3dmark does the same thing if not just all out lock up.
 
Why do you think the Corsair XMS 2 crashes below its rated speed? My theory is that Memtest utilizes the CPUs 100% (I checked) and therefore crashed because of a CPU error. But I am not sure if that is true...
 
typexero said:
Why do you think the Corsair XMS 2 crashes below its rated speed? My theory is that Memtest utilizes the CPUs 100% (I checked) and therefore crashed because of a CPU error. But I am not sure if that is true...
Click to expand...

CPU errors might be the reason for memtest errors. I remember running 400fsb with a e6400 at stock voltage on a 945p chipset. It could have been either the cpu not having enough volts or the nb being pushed too far. However, in your case, I don't suspect the nb ;)
 
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