Phenom II 940 + LN2 at PCLab.pl
Hello, it's Yotomeczek and me again!
We had another benching session after hours at PCLab.pl, this time with LN2 and Phenom II sample.
rig:
- AMD Phenom II 940 week 41
- ASUS M3A79-T Deluxe voltmodded
- G.Skill PI 2x 2GB 800-4-4-4-12
- Corsair Dominator 2x 1GB 1250-5-5-5-18
- ASUS GTX295
- Thermaltake 1000 W PSU
- Yotomeczek's single stage and LN2 pot - both by Ryba
Max MHz:
http://omgwtfbbq.ovh.org/files/hw/phenom2/cpuz_5741.jpg
Max PI 1M:
http://omgwtfbbq.ovh.org/files/hw/phenom2/spi_13197.jpg
Max Wprime 32m:
http://omgwtfbbq.ovh.org/files/hw/ph...wprime5418.jpg
And max PI 1M on SS:
http://omgwtfbbq.ovh.org/files/hw/phenom2/spi_15178.jpg
Rig picture:
http://omgwtfbbq.ovh.org/files/hw/phenom2/ln2_rig.jpg
Pot full of LN2:
http://omgwtfbbq.ovh.org/files/hw/phenom2/full_pot.jpg
Some observations:
- with HT Link Speed under 1000MHz there are no signs of coldbug
- with HT above 1000MHz CPU coldbugs around -55°C
- any benchmark longer than SPI 1M was almost impossible to get stable - I think motherboard might be the problem
- CPU scales with cold rather than with voltage. Anything above 1.85 V shows no improvement at all with LN2 (1.61V under SS).
After all, we were a bit unsatisfied with low stability at longer benches, but nevertheless happy :up: We're not finished with Deneb, retail CPUs are coming :D
Big thanks to Bruno from AMD for sponsoring our LN2!
