2.8 ghz P4C overclock

[asadovsky]

I just messed some with the OC settings. Right now its at 240 FSB with a 5:4 ratio, so the processor is going at 3360 mhz and the RAM at 196. This passed through a cycle of memtest86, though I'm sure I should test it more rigorously if I want good stability. It'd be nice to hit 250 FSB, but memtest86 kept crashing around 7% on test 1 when I did that. I left the CPU voltage on auto, and put the RAM voltage on 2.75... is that good? Also... how much will this OCing hurt the life of my processor and/or other components? And finally, what should I use to test this system for stability?

System specs:
Asus P4P800-Deluxe mobo
Intel P4C 2.8ghz (800 FSB)
Corsair TwinXMS 512MB 3200LL (totals 1 GB)
radeon 9700 pro
soundblaster audigy 2
430W antec PS

 

[Corporate Thug]

2.75 is fine for the ram but you shouldnt have to bump it any if u are at stock speed or lower (200mhz)
the oc shouldnt take anything off the life of the CPU if it is done @stock voltage

 

[asadovsky]

Hmm... I'll try returning the RAM voltage to auto then. Also... is 2/2/3/5 any better than 2/2/3/6? I know that the last number is supposed to be calculated based on the others, so I thought 5 might in fact be too low. And finally... is there any reason why you think I can't get the system to 250 FSB (so that the RAM runs at 200 FSB)? Right now its at 240 FSB, but that seems to be the highest it wants to go.

 

[asadovsky]

Hmmm the Prime95 torture test didn't like my OC, so I backed it down to stock speed (2.8 ghz) and so far, Prime95 hasn't had any errors *knock on wood*

I am getting the feeling that I didn't get optimum RAM for OCing my mobo. What would you guys recommend for a P4P800-Deluxe, which I want to OC some, but not to extremes (using stock cooling). I saw some people using Kingston HyperX 3500, and some using Corsair XMS 3500 2C

Can I get some advice?

 

[Corporate Thug]

2-2-2-5 is generally better, 2-2-2-6 may be better for OCing

 

[myocardia]

It actually just sounds to me like you might have gotten a motherboard that is limiting your OCing. Corsair XMS 3200 will go well over 400 Mhz, even at 5T. What version BIOS are you running on it? That can make a difference, along with having enough case cooling.

 

[Fallengod]

For ram timings, you can get hard drive corruption errors sometimes with 2-2-2-5, so be careful. 2-2-2-6 is supposed to be safer.

 

[asadovsky]

I just got everything running stable at 230 FSB with a 5:4 ratio. I don't think I'll go any higher; 3220 mhz is plenty and my RAM timings are great at 2/2/3/6. Also, I don't want to increase the voltages. Right now they are at: vcore=auto, dimm=2.75v, AGP=1.5v. Since I am using stock cooling, overclocking more would probably not be such a good idea anyway. The system is running great now... thanks for all the input guys!

In case you didn't catch my system specs... they are:
Asus P4P800-Deluxe with .1008 BIOS
2.8 ghz P4C @ 3.22 ghz
2x 512 MB Corsair XMS 3200LL ram @ 2-2-3-6 (this is the lowest they go)
Antec 430W power supply

 

[asadovsky]

Strange... is it just me or did some of the messages in this thread disappear?

 

[Fallengod]

Originally posted by: asadovsky
Strange... is it just me or did some of the messages in this thread disappear?

No youre on crack.

 

[asadovsky]

Do you guys think I should try to slow down the RAM timings and see how high I can get the FSB at 1:1? I heard that's better than 5:4...

 

[Shimmishim]

the thing is that the performance hit isn't HUGE.... not as big as initially thought... (there have been posts all over different forums about this)

but the only thing is that you can't run PAT or MAM or whatever it's called with the asus 865 chipset boards if you run a 5:4 or 3:2 divider... it only works with 1:1



this was the thing that discouraged me from getting a springdale...

 

[asadovsky]

From all the tests I've seen, RAM is actually slower when the PAT is on, so I keep it off. The 865 boards are just as fast as the 875s though, and about $60 or $70 cheaper

When I get home I'm gunna try to hit 230 FSB with my Corsair 3200LL. Do you think this is possible? What should I set my timings and voltage at?