Quote Originally Posted by Sam_oslo View Post
In my experience, this is true up until @3.8.GHZ, HT:on, and 4GHZ HT:off, but it seams to need some more tweaking to stabilize @4GHZ, HT:on.

@4GHZ HT:off, i can prime for several houser, and pass memory tests with these values:

@4GHZ HT:off (200x20), 1.31v(load) and 1.26v VVT :



@4GHZ(19x211) HT:off, 1.28v(Load) and 1.29v VVT. This primes with 1.26v too.


But the moment it hits @4GHZ, HT:on, it fails at the moment i start prrime95 with 1.33v(load) and 1.32v VVT. I tried a few other Vcore and VVT too, but still fails/freezes at the first moment of prime95. This doesn't BSOD as usual (when it needs more Vcore), but freezes. It seams to need tweaking on other values. What is your opinion?



You have a big and important point here, and it deserves further investigation. Could this be the reason for less Vcore with my 1.29 VVT?.
@4GHZ HT:off (200x20), 1.26v VVT it needs at least 1.31v(load) to be primestable. But
@4GHZ(19x211) HT:off, 1.29v VVT it is primestable with only 1.28v and even 1.26v(load).

I never figured the reason for this difference, could that "little extra" VVT be the reason?
each cpu is different.. as Anandtech folks said, finding the balance between cpu vcore, cpu vtt (uncore) and vdimm is key for stability

Quote Originally Posted by linflas View Post
Very tempted, we shall see, especially if the ATI refresh does show up at the end of the month.
maybe D0 stepping i7 920 by then heh.



Just doing some quick Super Pi 32M tests to see how this 2nd i7 920 cpu does in terms of raw cpu overclocks and to my surprise it handles like my 1st i7 920 even down to it's max Hyperthreading enabled Super Pi 32M ceiling being under 4500Mhz. On air cooling, anything over 4500Mhz will reboot part way through Super Pi 32M with HT enabled. Need to disable HT to pass Super Pi 32M at >4500Mhz speeds.

Max 32M








Haven't pushed it higher than 1.536v vcore yet.

System specs
  • Intel Core i7 920 3836A756 #2
  • Thermalright Ultra 120 Extreme + LGA1366 Bolt Thru kit + 2x 120x38mm Scythe UltraKaze 2000rpm 87cfm fans in push/pull
  • DFI LP UT X58-T3EH8 R.A51 - 01/23 beta bios
  • 512MB Inno3D 8800GT OC Edition
  • Ram cooling: 3x 60x25mm Sunon 23.5cfm Maglev fans
  • 750GB Samsung SATAII
  • Pioneer DVD-RW
  • 1KW Corsair HX1000 psu
  • WinXP Pro SP3 full nLite updated hotfixes / Windows 7 beta dual boot