Comparison of current GPUs PPD/watt and PPD/price
https://docs.google.com/spreadsheets/d/ ... gVlxRPnz0/
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foldy wrote:The formula would be e.g. for a gtx 1070 compared to a gtx 980Ti which have nearly same PPD
gtx 1070 Power usage = 150 watt
gtx 980Ti Power usage = 250 watt
Power usage saved with gtx 1070 compared to gtx 980Ti = 100 watt = 0.1 kwh
Power usage saved in a year = 0.1 kwh * 24h *356 days = 855 kwh
Power cost = $0.12/kwh
Power cost for 855 kwh = $0.12/kwh * 855 kwh = $103 per year
gtx 1070 Initial cost = $400
gtx 980Ti sell for $300 on ebay.
Remaining cost $400 - $300 = $100
Remaining cost / Power cost savings per year = $100 / $103 per year = 1 year
So it takes 1 year to amortize the initial cost of a gtx 1070 when selling an existing gtx 980Ti.
After the first year you save $103 every year.
rhavern wrote:I too do a similar thing but instead of using PPD, which varies greatly between WU, I use the numbers from FAHbench as they are not dependent on per project benchmarking. Typically the Explicit/1 numbers are the most relevant, so I build a table of Exp1/<unit of currency> and Exp1/watt, then add some conditional formating color scales to guide the eye. I also look for actual test results to get measured watts used instead of claimed, although I track both numbers out of interest.
dreiter wrote:Hi foldy,
Just for an update, the 1080 is down to $499 MSRP now. This should bump it's PPD/price up to 1.7, which is tied for the highest PPD/price. It's definitely looking like a much better 'value' proposition for folding now.
Aurum wrote:dreiter wrote:Hi foldy,
Just for an update, the 1080 is down to $499 MSRP now. This should bump it's PPD/price up to 1.7, which is tied for the highest PPD/price. It's definitely looking like a much better 'value' proposition for folding now.
That's assuming a 1080 averages 860,000 PPD.
I just bought a couple of EVGA 1070s for $335 each and they at 2.1 PPD/price. Still the sweet spot.
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