Much of the original point I tried to make has evaporated in light of ETH >.015BTC (.017? .019!?! .02!!!), electric costs should be a non-consideration for most. That said:
100% GPU TDP on 970 = 145W
Do the math, break it down, here's the numbers:
Overclocked, maintaining <70C core temp (high fan profile):
gpu1 (incl. fans on card): 108W (75%TDP)
gpu2 (incl. fans on card): 115W (80%TDP)
4 case and 2 cpu fans, hdd, mobo/cpu: 50W (case fans ramped to 60%)
Total so far: 273W
PSU loss: 55W (80% efficiency; 0.2 * 273 = 55W)
273+55 = 328W, or basically what I've monitored on the UPS
42MH/s, 7.8W/MH (total system), 5.3W/MH (gpus only)
Stock, maintaining 75C core temps, stock fan profile, both @65%TDP:
gpu1: 90W
gpu2: 90W
case fans+hdd+mobo+cpu: 30W (silent pc mode)
Total so far: 210W
PSU loss: 42W
Total system: 264W
36MH/s, 7.0W/MH (total system), 5.2W/MH (gpus only)
Something I'm going to try is disabling Windows Aero. Even though it's a headless system and it's not doing anything, some have mentioned it stealing GPU power all the time regardless of use, therefore decreasing hash. I've seen weirder things, especially on Winblows. God, I've got to roll Mint or something.
I've seen the "my 280x will do xxMH on yyyW with zzzV undervolt" before, I still have no clear idea because so many things play a factor in pushing the limit. I've seen people today who own multiple rigs, running mixes of 7950 and 280x, undervolted/clocked/tweaked/whatever, drawing over 3KW to get 350MH/s (9W/MH!), and they're happy with that. To each their own, ETH's at .02BTC, electric ain't much of a matter no mo.
I think I'm done with this particular thread.
But that extract fan power consumption is due to the mining as well. So we have to take that in to account.
100% GPU TDP on 970 = 145W
Do the math, break it down, here's the numbers:
Overclocked, maintaining <70C core temp (high fan profile):
gpu1 (incl. fans on card): 108W (75%TDP)
gpu2 (incl. fans on card): 115W (80%TDP)
4 case and 2 cpu fans, hdd, mobo/cpu: 50W (case fans ramped to 60%)
Total so far: 273W
PSU loss: 55W (80% efficiency; 0.2 * 273 = 55W)
273+55 = 328W, or basically what I've monitored on the UPS
42MH/s, 7.8W/MH (total system), 5.3W/MH (gpus only)
Stock, maintaining 75C core temps, stock fan profile, both @65%TDP:
gpu1: 90W
gpu2: 90W
case fans+hdd+mobo+cpu: 30W (silent pc mode)
Total so far: 210W
PSU loss: 42W
Total system: 264W
36MH/s, 7.0W/MH (total system), 5.2W/MH (gpus only)
Something I'm going to try is disabling Windows Aero. Even though it's a headless system and it's not doing anything, some have mentioned it stealing GPU power all the time regardless of use, therefore decreasing hash. I've seen weirder things, especially on Winblows. God, I've got to roll Mint or something.
I've seen the "my 280x will do xxMH on yyyW with zzzV undervolt" before, I still have no clear idea because so many things play a factor in pushing the limit. I've seen people today who own multiple rigs, running mixes of 7950 and 280x, undervolted/clocked/tweaked/whatever, drawing over 3KW to get 350MH/s (9W/MH!), and they're happy with that. To each their own, ETH's at .02BTC, electric ain't much of a matter no mo.
I think I'm done with this particular thread.
Copypaste from the nvidia link you posted earlier:
Note: The below specifications represent this GPU as incorporated into NVIDIA's reference graphics card design. Clock specifications apply while gaming with medium to full GPU utilization. Graphics card specifications may vary by Add-in-card manufacturer. Please refer to the Add-in-card manufacturers' website for actual shipping specifications.
You don't have reference design card.
You have a card made by what Nvidia calls add-in-card manufacturer.
Your card does not have TDP of reference design card. In your case card has TDP of 170W because EVGA chose to put that kind of bios to your card. EVGA also chose you can boost your TDP 10% to 187W. EVGA also chose that your card takes 75W from pcie1, 75W from pcie2 and the rest from the pcie slot.