Allendale's not oc'able on 680i?

[Freejack2]

From what I understand the 680i's fsb can only do in the low 400's. The allendale cores are 800mhz cores or a E2160 would be 400x4.5=1800.
It sounds like at best I could get an Allendale up to is about 2ghz if the 680i can handle 450fsb. But that's it. Am I correct on this or is there some trick I'm missing?

 

[MarcVenice]

You're missing something. The multiplier is about 8 or so, on the e2140, 8*200 = 1.6ghz, and would be 10 on the e2180 = 2.0ghz. 8x450mhz gives 3.4ghz. I'm not sure why you are multiplieing with 4.5, but that's incorrect.

 

[The-Noid]

Pretty common problem.

Multiplier should be 200x9 or 1800. However it is hard to overclock the chips as the 680i will default to the 200 fsb strap. You will need to BSEL mod the chips to hit any kind of high fsb.

 

[Freejack2]

Ahh I see what my mistake was I have a C2D 6400 in my system and I was looking at mine thinking mine was a 533 fsb when it's a 1066 fsb.
I had thought the Allendales 800fsb was faster than the E6400's when the reality the is it's slower, so a 680i should overclock it very nicely.
I'm assuming if I want to shoot for a 400mhz (x4=1600fsb) bus speed I'll want a E2140 which will give me a 3.2ghz OC. My E6400 runs happily at 3.2ghz so I'm guessing the Allendale will have no problem either? Or have people been having problems getting the 2140s to hit 3.2ghz?

Thanks for straightening me out on this.

 

[VirtualLarry]

My E2140 hit 3.28Ghz easy, with 1.4125v BIOS vcore, on a GA-P35-DS3R.