Quote Originally Posted by bingo13 View Post
I have a slightly better i920 now, does not clock as high as my week 38s but I can run VTT up to 1.58 now without a problem. Not that I ever want VTT that high but this CPU will do it and will run 6GB at CAS7 2000 without a problem now. I have the Corsair 6GB 2000 kit at 2050 7-8-7-20 1T with 1.65V and VTT at 1.51V on a 20x206 setting, 24/7 stable. Drop CPU multi to 19x and watch the voltages come down....

Also, Andre was running VTT around 1.69V for his results, not good, not good at all on these CPUs....
Yeah I knew you folks said each cpu has differing cpu vtt handling but didn't realise how different it can be until i started testing my 2nd twin i7 920 3836A756 batch cpu.. if this thread post http://www.xtremesystems.org/forums/...9&postcount=37 doesn't illustrate the difference that can occur between cpus I don't know what will

All on TRUE120 air with DFI UT X58-T3EH8 1/23 beta bios

i7 920 3836A756 #1
  • max memtest86+ bootable bclk = 224 requiring 1.58-1.60v CPU VTT
  • max super pi 32m bclk = 222bclk (without IOH/ICH voltage tweaks) & 228bclk (with IOH/ICH voltage tweaks) requiring 1.60-1.61v CPU VTT
  • max CPUZ Validation = 230bclk requiring 1.60-1.63v CPU VTT


i7 920 3836A756 #2
  • max memtest86+ bootable bclk = 229bclk requiring 1.40-1.48v CPU VTT
  • max super pi 32m bclk = 227bclk (without IOH/ICH voltage tweaks) & ???bclk (with IOH/ICH voltage tweaks TBD) requiring 1.48-1.50v CPU VTT
  • max CPUZ Validation = 231bclk requiring 1.50v CPU VTT
Quote Originally Posted by AndreYang View Post
High memory clock need high VTT, especially DDR3 2200+ CL7. I know you know that. Should I need to show up VTT 1.4V DDR3 2000 CL7 1.53V memtest 1000% for you.
no need Andre just show me super pi 32m at those clocks with CPU VTT 1.4v and 1.53v vdimm will be enough to prove your point

But yeah everyone knows higher mem clocks = more CPU VTT needed