Topic: 7970 results with a kill-a-watt - page 2. (Read 3500 times)

If he's got two 7970s, he can measure the system idling with 1 card and 2 cards and that will tell him his idle use.  I didn't think the point of the thread was to measure the MW/watt for the system, only the card.

The MH/watt numbers would be skewed if you're only measuring delta.

OP should test with no graphics card idle in order to establish a baseline.

Cool, matches my numbers pretty much exactly.

You don't have to have a lower power MB/CPU.  If you're measuring the card use, you're just concerned about the delta between load and idle, not the total usage.

will test entire system when I get my parts for a low power MB+CPU combo and see how it affects the numbers

The best test is to measure the entire system at rest and at load.  That will tell you the true usage of the card.  The card will consume power when idle, but since the computer isn't going to idle, it isn't a concern.

Doesn't this ignore the power pulled from the slot? Do we just assume ATX spec is being pulled from the slot?

dropping the memory for some reason dropped the hash ~10 (using diablo)

EDIT: my bad, I see what you're saying... fixed it

The bolded numbers look wrong. Compare it to your first line.

I know Afterburner has a bug where if you change the voltage without changing the core clocks, the card seems to go into 2D mode. Try 924 MHz.

I've plugged a 7970 into a seasonic 400x without anything else plugged into the psu and here are the results straight from the wall: (all settings done with afterburner - REMEMBER these numbers are only for one card not the system)

STOCK

core volt: 1.112
core clock: 925
mem volt: 1.600
mem clock: 1375
idle: 26.5w
load: 245w

MHash/s: 550

===============================================

core volts / core clock / mem volt / mem clock / load / mhash - mhash per watt

1.112 / 925 / 1.500 / 685 / 238w / 550 - 2.31
1.112 / 925 / 1.500 / 340 / 230w / 547 - 2.37
0.975 / 925 / 1.500 / 150 / 152w / 540 - 3.55
0.950 / 925 / 1.500 / 150 / 140w / 540 - 3.85
0.925 / 925 / 1.500 / 150 / 131w / 540 - 4.12
0.925 / 925 / 1.500 / 340 / 132w / 545 - 4.12
0.925 / 925 / 1.500 / 685 / 135w / 548 - 4.05
0.918 / 925 / 1.500 / 150 / 128w / 540 - 4.21 [MOST EFFICIENT]
0.918 / 925 / 1.500 / 340 / 130w / 545 - 4.19
0.900 / 925 / 1.500 / 150 / 000w / 000 [FAILED]
0.925 / 950 / 1.500 / 150 / 133w / 555 [FAILED after 30min+]
0.937 / 950 / 1.500 / 150 / 139w / 552 - 3.97
0.937 / 950 / 1.500 / 340 / 140w / 559 - 3.99
0.937 / 975 / 1.500 / 150 / 142w / 569 - 4.00
0.937 / 975 / 1.500 / 340 / 000w / 000 [FAILED]
0.943 / 975 / 1.500 / 150 / 144w / 570 - 3.95
0.943 / 975 / 1.500 / 340 / 146w / 575 - 3.93
0.943 / 1000 / 1.500 / 150 / 000w / 000 [FAILED]
0.956 / 1000 / 1.500 / 150 / 152w / 584 [FAILED after 30min+]
0.962 / 1000 / 1.500 / 150 / 146w / 584 [FAILED after 30min+]
0.975 / 1000 / 1.500 / 150 / 155w / 584 - 3.76
0.975 / 1000 / 1.500 / 340 / 158w / 590 - 3.73




I'm going to do a few more different combinations until I find one that produces the best hashes for watt. I'm gonna add more so keep watching and if you want me to try a combo let me know.