Cold bug information:
I have now confirmed from AMD that when running Phenom II X4 with LN2 HyperTransport link has to be in HT 1.0 mode (running 1 GHz) to prevent CPU cold bugging. AMD suggested us using this setting in Chicago event and we had no problems hitting +6 GHz.
Hi everyone, I got back home from Chicago last night where AMD organized Dragon platform preview event.
First of all huge thanks to AMD (Macci, Simon, Pete and everyone) for inviting Team Finland (Sampsa & SF3D) to the Dragon event. It sure was a nice opportunity to run some first tests with Phenom II X4 and LN2 cooling.
Me pouring LN2, no need to fine tune temps
Chilly system running full steam
Gigabyte's 790GX retail board
Kingpin's F1 EE full of LN2, this was so sweet
Typical Vcore we used
Macci playing around with Dragon EVO pot
Here is a CPU-Z shot after some minutes of testing
- All the Phenom II X4 CPUs me and SF3D tested had no cold bug at all
- All the chips we tested could do +6,1 GHz CPU-Z
- We tested with AMD's 790GX reference board and Gigabyte's retail 790GX
- Both mobos worked fine under cold, +6 GHz and +1,95V vcore
- Vcore ~1,95V was optimal for +6 GHz clocks
- 3DMark05 & 06 CPU-tests were ok @ 6 GHz
- We were able to run Crysis @ 6,1 GHz (2 loops CPU-test)
- Max CPU-Z screenshot and validation we got with 4 cores was 6280 MHz (no dirty tricks)
- With air cooling (Cooler Master Z600) highest we got Crysis stable was @ 4,13 GHz (1,58 V)
We tested couple different revisions (ES and newer ones) but lets see how it turns out when retail chips will be launched.
I don't want to make any promises but I encourage everyone to go ahead and test yourself.
These results were definitely not maximum numbers possible to achieve.. and there might be some extremely cool (literally) numbers coming soon
More pics, ss and video coming soon
If you have any questions, I'm more than happy to answer (no peformance numbers because of NDA).