Hi.

Has anyone tried to compare the gpu computing performance of GTX 1080 to GTX 1070?
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Last I've heard was that this project doesn't support Pascal cards yet. Best you can do is compare compute performance in other projects and hope relative performance transfers to GPUGrid.

Yes, I know that GPUGRID has not yet finished the Pascal´s gpu support, but I thought if anyone has got any experience from other projects (Einstein, POEM or Collatz).
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Great info skgiven

Thanks

Got to hand it to you SK you certainly spend a lot of time and include a lot of thought and detail in your answers to peoples questions.

If only we could get scientists and admins to do half as much.

Thanks a lot for your opinion.

In theory, there isn't much in it.

However, I don't have Pascal's to work from because at present they are far too expensive IMO and this project doesn't support them, yet. In time the prices will fall and the devs will revamp the app and that will be the best time to buy Pascals.

Theoretically, the boosted SP GFlops ratings are 6463 for a 1070 and 8873 GFlops for a 1080. That's 6463*3=19389 for the 3 1070's & 8873*2=17746 for the 2 1080's.

In the UK prices are high due to the lack of availability and so on but right now 3 1070's would cost £400*3=1200 and two 1080's would cost £620*2=1240.
The Founders Editions are more expensive, so you don't want to be comparing apples with oranges.
In the US, the MSRP is $379 and $599. There 3 GTX1070's would cost $1137 and 2 GTX1080's would cost $1198.
Alternatively, the Founders Editions are $449 and $699 :- 3 GTX1070's would cost $1347 and 2 GTX1080's would cost $1398.

The TDP's are 150W for the 1070 and 180W for the 1080 so power consumption would be 150W*3=450W and 180W*2=360W. The importance of that factor changes from location to location depending on electric prices.

To summerise,
Three 1070's would theoretically do slightly more work & cost slightly less but would use a bit more power and generate a bit more heat.

I'll throw in the as yet unreleased GTX1060 just to muddy the picture further :)
@4372 SP GFlops (Boosted), 4 would give you 4372*4=17488GFlops which is only marginally lower than the GTX1080's in theory!
The Founders Editions are supposed to cost $299, so 4 would cost $1196 - about $150 and $200 less than 3 GTX1070's and 2 GTX1080's respectively.
The MSRP edition is $249 so 4 would cost $996 - $141 less than 3 MSRP 1070's and more notably £202 less than 2 1080's.
However, 4 GTX1060's would have a combined TDP of 480W which is 120W more than two GTX1080's.

None the less, it's interesting that the GTX1060's will be GP106, their base clock is slightly higher than the GTX1070's and the Bus width, while lower than the 1070 and 1080's, will be relatively higher against the SP boost; ~10% higher than the 1070. IF (and we've no idea yet) bandwidth will be an issue for here (or anywhere else) the 1060's might be a better choice than the 1070's. Further, the GTX1070's bandwidth to GFlops ratio is more favourable than the GTX1080's (despite the 1080's using the more expensive GDDR5X) ~9.8% better [in theory].
Then there is the issue of scalability. The bigger the GPU's get, the less their performance scales for here (at least up until now).
As we don't know what else may follow (a 110W 3GB version of the GTX1060 or a 1050Ti) we don't know what will be the best buys for here or anywhere else.

collatz times
asus rog strix 1080 o8g - 1:36 average run
asus rog strix 1060 o6g - 2:45 average run.
for what its worth

2025 for the 1060
1918 for the 1080
both hover around ~83% utilization.

i had to dial the 1080 a little for crunching to control the heat. one day i'll get around to switching to liquid.

going over the valid WUs reported: i was incorrect on the 1060 times its actuall ~3:05. teach me to eyeball stuffs.

theres some 960 results in the mix below as well:

http://boinc.thesonntags.com/collatz/results.php?userid=1571551&offset=40&show_names=0&state=4&appid=