P4 2.8 OC question

[imported_hopeless]

How far can you go before you have to start uping the vcore voltage?

 

[FelixDeCat]

Depends on the chip. A 2.8c m0 will probably to 230 fsb w/no voltage inc. Maybe 250+ with. Other 2.8s will be lucky to hit 220 w/o. Ive had better m0s and non m0s. The non m0s varied widely. Again, depends on your bit of silicon. But the m0s hit it everytime, and fetch a premium when you can find one available.

 

[Lithan]

I've had 2.8C's that only did 3.2-3.3ghz on stock vcore and ones that did 3.6 on stock vcore.

 

[imported_hopeless]

I'm assuming that the m0 is on the top of the chip? Or is there another way to find it out?

 

[TStep]

2.8C MO has "SL6Z5" on the chip.

 

[yourdeardaniel]

Originally posted by: hopeless
I'm assuming that the m0 is on the top of the chip? Or is there another way to find it out?

look at the PRODUCT CODE on the box, also written on the CPU:

should have SL6Z5 at the end.

you could also download CPUID and check the stepping. should be M0.

i have a SL6WT D1 stepping, 30 capper. does 2.8 @ 3.5 with stock voltage (well i had to up it to +.05 to 1.55 cuz my mobo undervolts)

it's all luck of the draw, good luck with overclock

 

[imported_hopeless]

Ok, I went & got my box out & it ends with SL6WT. This is my first pc I've built & the first that can be oc'ed. How does the steping affect things?

 

[Duvie]

It doesn't mean it wont be a good ocer, but in general newer stepping result in better ocing.

I have seen 2.8c mo which for the most part were P4EE chips that the l3 cache did not pass for some reason and were down binned. I have seen many 2.8c D1 stepping chips get to 3.5ghz on air with 1.6v or less of actual vcore. There are many things that can hold you back form this besides the cpu alone so start pushing ahead and find out for yourself. Then report back to us and we will try to help you read the results you get and wheter the cpu can go higher, is too high, or you have other components that are ultimately limiting you.

I have a D1 stepping 2.4ghz that does 3.5ghz with 1.6-1.61v of actual vcore and has been running that way since Feb 04.....I have also seen ppl get M0 stepping 2.4ghz chips not get past 3.3 to 3.4ghz at same vcore. Mileage really does vary when it comes to ocing. It is a game we play and love....

 

[prhamil52]

Mine is running 3.5G on default voltage. My system is nearly identical to the thread originator.

 

[lupohki]

The 2.8 from my Dell 400SC is a SL6WJ Malay and does 3.5 at stock voltage on my IC7.

 

[khurios2000]

Originally posted by: lupohki
The 2.8 from my Dell 400SC is a SL6WJ Malay and does 3.5 at stock voltage on my IC7.

Mine has the same s-code SL6WJ, default at 1.55v can do 235 on my crappy P4S800-MX