C0 e8400 OC... yet another thread

[djnsmith7]

Both of mine topped out at 4.0 & I'm not willing to push any higher...No complaints about the speed here...

 

[imported_wired247]

one thing that came out of all of this...

now that i've decided to keep the cpu at 3.6, i'm replacing the sunbeam fan with an ultra low speed 500rpm scythe slipstream 120mm and I'm going to replace my case fans with lower speed 800rpm versions as well.

And incidentally I can now run my old ram with my new ram, so I now have 8GB. no complaints there

 

[Rick James]

Looking around the forums i can see most guys with O/C issues are running 60C. Improper cooling is the biggest killer of stability with an overclock.

Everyone having cooling problems should reevaluate there case cooling before even thinking about upgrading there heatsink. Heatsink can't properly cool the processor if it's hotter then hell inside the case.

 

[polarbear6]

Originally posted by: nerp
I think getting a C0 @ 4ghz stable is a luck of the draw. Some people manage it, others never will. I think settling at a safe voltage/speed is the way to go. I could run 3.8ghz 24/7 but I opted for 3.6 at very low volts.

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[polarbear6]

Originally posted by: nerp
I think getting a C0 @ 4ghz stable is a luck of the draw. Some people manage it, others never will. I think settling at a safe voltage/speed is the way to go. I could run 3.8ghz 24/7 but I opted for 3.6 at very low volts.

dude i also have a c0 stepping chip
u know what try 1.2v for 3.6ghz oc
i think u can even go till 1.18v

 

[dust]

Have you tried booting with the voltages on auto? Just to see how much juice the mobo "thinks" it needs. Also having 8gb Ram doesn't help with the OC to my knowledge and you may want to experiment with 4gb first. It's a good bet that the NB needs more than 1,45-1,5 v for >4gb Ram

 

[imported_wired247]

Yes I've tried auto voltages, and it was stable for far shorter period of time than manually setting voltages.

As I said I backed off the OC to 3.6, I'm fine with it here ... at least the voltages are safe and the heat is well under control.

The mobo booted 8gb of ram (2 different brands, 2 different timings, 2 different voltages) first time, no problems. They're all running at ddr2-800 now.

 

[Matte8400]

My E8400 Jumps up from 31 C idle to 50 C on a full load such as playing my higher demanding games. I took fan off and applied more thermal paste hope it helps it. My Card is a powerhungry graphics card (150 watter) i often wonder if thats what spikes my temps.

Core 2 duo e8400 wolfdale ocd 10% 3.29 Ghz
ASUS P541GT-M LX Motherboard v2.61 bios
650 watt Prudent way superior plus PSU
Nvidia GTS-250 1GB GDDR3
Supertalent 2x2gb ddr3 10600 ram w/heatsinks

 

[amenx]

I had an early e8400 CO as well. They dont OC as well as the EO chips and mine took around 1.42v to reach 4ghz. But after reading so many people seeing their chips degraded even with not so excessive voltage, I dialed mine back to 3.6ghz on stock volts.

Still have the chip on a spare machine but have found that it is not as stable as before, ie, would not pass prime tests without errors. It is now running at stock 3ghz, which is the highest stable speed I can get it at.

The wolfdales imo have the highest rate of degradation out of any Intel chips released over last 5 years. Many threads have been made on it over so many forums. There are many people saying they had no probs at 1.5-1.6v, but there are lots that had degradation at much less, even in the 1.4v range. I just wonder how many who ran it at high volts years ago are still running it today at same speeds if they still have the chips.