Quote Originally Posted by Andreas View Post
Finished the 2 smaller systems with two ATI 7970 each today: Different design objective vs. the green machine.

The Gigabyte 7970 can't be packed as dense as the Titan's. Can't cope with the heat in the case. Instead of one PC I build 2 simpler ones with the entry level CPU only targeted to drive the GPUs, no CPU folding: Intel Celeron G1610 ($50). This CPU is more then capable to drive the two 7970 cards. During normal operation, CPU load is at 16-20% (@1.8 GHz), during checkpoints CPU is at 60%.

Power (measured on the wall outlet)
idle: No GPUs. 30 watt
idle: 2 GPUs. 80 watt
FAH: 380 watt

temperature:
both GPUs are now at 60-65C - much better than the 100C in a 4GPU setup I had previously.

Performance:



CPU load - It wouldn't have made much difference to add a higher performing CPU from a PPD perspective, but the energy efficiency would have gone down.


Andy



well done!

Im tinkering with my i7-920 currently. Ive got it bumped down to 60% on 7 cores and its pushing about 10k ppd @ 2.8ghz. Im going to bump the speed up here shortly and see what i can get it to.

What im noticing is my 5850hd is dragging it down quite a bit, i may end up removing the slot for it and see what my points are up to then.