QPI Speed?

lettuce · 30 Jan 2010 at 13:35

What should the QPI speed be set at in the bios, in relation to the cpu clock?

lettuce · 30 Jan 2010 at 23:35

anyone?

lettuce · 31 Jan 2010 at 01:16

So it has to be double what ever the current memory speed is, my memorys at 1333mhz atm, so ill want the QPI to be 2666 or there abouts?, or though CPU-Z is saying its 2928hmz atm

Isnt there a no go area for the QPI is it no less that 1x memory speed??

lettuce · 31 Jan 2010 at 10:44

so when overclocking you should try and have the qpi speed multiplier as low as possible then, for i3/i5 based mobos?

lettuce · 31 Jan 2010 at 20:44

So should you have the QPI speed set to the lowest multiplier when OC'ing??

lettuce · 1 Feb 2010 at 00:15

Well on my i3 GA-H55M-S2h mobo , there doesnt appear to be a Uncore value, just:

CPU Clock Ratio
QPI Clock Ratio
BCLK Control.

So if i have my cpu clocked at 3.8ghz with a cpu clock ratio of 22x, and BCLK at 173x, what ideally should i have the QPI set to, atm ive left it on Auto, and CPU-Z is saying its 2768Mhz

lettuce · 1 Feb 2010 at 14:04

What's all this talk on mt/s and gt, the qpi value in my bios is Ghz only?? The stock setting for i3 appears to be 5.45GHz I think, but when in CPU-z it shows a value of 2.89ghz or something??

lettuce · 1 Feb 2010 at 16:45

Ah so with the i3 530's QPI is linked with the latency for memory. As i have bog standard corsair memory i might aswell keep it at stock, if it doesnt have a direct effect on cpu speeds?. So basically the higher you have the QPI the more it stress the memory more than the actual cpu?