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Message boards : Sieving : Question about multiple GPU's in the same machine

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Profile Jordan Romaidis
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Joined: 11 May 17
Posts: 274
ID: 880615
Credit: 823,947,522
RAC: 40
Discovered 5 mega primesEliminated 1 conjecture "k"Discovered 1 AP26Found 1 prime in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de PrimesFound 2 primes in the 2020 Tour de PrimesFound 1 mega prime in the 2020 Tour de PrimesFound 1 prime in the 2020 Tour de Primes Mountain StageFound 1 mega prime in the 2020 Tour de Primes Mountain StageFound 1 prime in the 2021 Tour de PrimesFound 2 primes in the 2022 Tour de PrimesFound 1 mega prime in the 2022 Tour de PrimesFound 1 prime in the 2023 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,014,730)Cullen LLR Ruby: Earned 2,000,000 credits (2,080,460)ESP LLR Gold: Earned 500,000 credits (502,799)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,000,054)PPS LLR Double Bronze: Earned 100,000,000 credits (103,292,338)PSP LLR Amethyst: Earned 1,000,000 credits (1,092,773)SoB LLR Sapphire: Earned 20,000,000 credits (41,382,619)SR5 LLR Sapphire: Earned 20,000,000 credits (21,787,728)SGS LLR Sapphire: Earned 20,000,000 credits (20,284,625)TRP LLR Gold: Earned 500,000 credits (821,174)Woodall LLR Jade: Earned 10,000,000 credits (15,028,246)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,084,376)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,606,749)PPS Sieve Sapphire: Earned 20,000,000 credits (30,065,949)AP 26/27 Double Silver: Earned 200,000,000 credits (257,818,067)GFN Double Bronze: Earned 100,000,000 credits (185,033,172)WW (retired) Emerald: Earned 50,000,000 credits (59,040,000)PSA Emerald: Earned 50,000,000 credits (53,011,665)
Message 111046 - Posted: 30 Oct 2017 | 1:47:00 UTC

Slightly confused here, I have a couple of questions:

1. If I Create a new reservation and choose 2 GPU's (they are both Nvidia CUDA) is the Cuda Specific EXE better or OpenCL?

2. After choosing 2 GPU's I ran this command:
gfnsvocl_w64_2G.exe 16 65614 65619 D1

But I got this output:
Found OCL platform "NVIDIA CUDA" by "NVIDIA Corporation"
GPU devices on platform: 2
D0: "GeForce GTX 770"
D1: "GeForce GTX 660 Ti"

So is it automatically using both GPU's or do I need to open another command and run gfnsvocl_w64_2G.exe 16 65614 65619 D0?

ID: 111046 | Report as offensive
Profile Rafael
Volunteer tester
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Joined: 22 Oct 14
Posts: 912
ID: 370496
Credit: 552,485,027
RAC: 466,454
Discovered 2 mega primesFound 1 prime in the 2023 Tour de PrimesFound 1 mega prime in the 2023 Tour de PrimesFound 1 prime in the 2023 Tour de Primes Mountain StageFound 1 mega prime in the 2023 Tour de Primes Mountain Stage321 LLR Jade: Earned 10,000,000 credits (10,008,611)Cullen LLR Jade: Earned 10,000,000 credits (10,005,009)ESP LLR Jade: Earned 10,000,000 credits (10,041,747)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (10,000,820)PPS LLR Jade: Earned 10,000,000 credits (10,143,381)PSP LLR Jade: Earned 10,000,000 credits (10,049,767)SoB LLR Sapphire: Earned 20,000,000 credits (49,484,958)SR5 LLR Jade: Earned 10,000,000 credits (10,003,746)SGS LLR Jade: Earned 10,000,000 credits (10,002,215)TRP LLR Jade: Earned 10,000,000 credits (10,011,903)Woodall LLR Jade: Earned 10,000,000 credits (10,076,850)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,033,828)Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (10,970,859)Generalized Cullen/Woodall Sieve (suspended) Jade: Earned 10,000,000 credits (10,037,204)PPS Sieve Jade: Earned 10,000,000 credits (10,305,147)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,053)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,030,160)AP 26/27 Emerald: Earned 50,000,000 credits (50,015,953)GFN Emerald: Earned 50,000,000 credits (85,796,469)WW (retired) Emerald: Earned 50,000,000 credits (50,712,000)PSA Double Bronze: Earned 100,000,000 credits (170,761,999)
Message 111047 - Posted: 30 Oct 2017 | 2:10:40 UTC - in response to Message 111046.

1. If I Create a new reservation and choose 2 GPU's (they are both Nvidia CUDA) is the Cuda Specific EXE better or OpenCL?

OpenCL is almost always better, as the app has been better optimized.

2. After choosing 2 GPU's I ran this command:
gfnsvocl_w64_2G.exe 16 65614 65619 D1

But I got this output:
Found OCL platform "NVIDIA CUDA" by "NVIDIA Corporation"
GPU devices on platform: 2
D0: "GeForce GTX 770"
D1: "GeForce GTX 660 Ti"

So is it automatically using both GPU's or do I need to open another command and run gfnsvocl_w64_2G.exe 16 65614 65619 D0?

You have to add the D command. Note that the app will only run on one GPU at a time, so you'll need to open 2 separate commands (each with it's own range) to make them both crunch.

ID: 111047 | Report as offensive
Profile Jordan Romaidis
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Joined: 11 May 17
Posts: 274
ID: 880615
Credit: 823,947,522
RAC: 40
Discovered 5 mega primesEliminated 1 conjecture "k"Discovered 1 AP26Found 1 prime in the 2018 Tour de PrimesFound 2 primes in the 2019 Tour de PrimesFound 2 primes in the 2020 Tour de PrimesFound 1 mega prime in the 2020 Tour de PrimesFound 1 prime in the 2020 Tour de Primes Mountain StageFound 1 mega prime in the 2020 Tour de Primes Mountain StageFound 1 prime in the 2021 Tour de PrimesFound 2 primes in the 2022 Tour de PrimesFound 1 mega prime in the 2022 Tour de PrimesFound 1 prime in the 2023 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,014,730)Cullen LLR Ruby: Earned 2,000,000 credits (2,080,460)ESP LLR Gold: Earned 500,000 credits (502,799)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (6,000,054)PPS LLR Double Bronze: Earned 100,000,000 credits (103,292,338)PSP LLR Amethyst: Earned 1,000,000 credits (1,092,773)SoB LLR Sapphire: Earned 20,000,000 credits (41,382,619)SR5 LLR Sapphire: Earned 20,000,000 credits (21,787,728)SGS LLR Sapphire: Earned 20,000,000 credits (20,284,625)TRP LLR Gold: Earned 500,000 credits (821,174)Woodall LLR Jade: Earned 10,000,000 credits (15,028,246)321 Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,084,376)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,606,749)PPS Sieve Sapphire: Earned 20,000,000 credits (30,065,949)AP 26/27 Double Silver: Earned 200,000,000 credits (257,818,067)GFN Double Bronze: Earned 100,000,000 credits (185,033,172)WW (retired) Emerald: Earned 50,000,000 credits (59,040,000)PSA Emerald: Earned 50,000,000 credits (53,011,665)
Message 111049 - Posted: 30 Oct 2017 | 2:18:44 UTC - in response to Message 111047.

Thanks for the clarification Rafael!

ID: 111049 | Report as offensive
JimBProject donor
Honorary cruncher
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Joined: 4 Aug 11
Posts: 920
ID: 107307
Credit: 989,270,184
RAC: 150,909
Discovered 1 mega prime321 LLR Turquoise: Earned 5,000,000 credits (5,009,915)Cullen LLR Turquoise: Earned 5,000,000 credits (5,031,868)ESP LLR Turquoise: Earned 5,000,000 credits (5,064,082)Generalized Cullen/Woodall LLR Turquoise: Earned 5,000,000 credits (5,038,750)PPS LLR Turquoise: Earned 5,000,000 credits (5,000,461)PSP LLR Turquoise: Earned 5,000,000 credits (7,674,374)SoB LLR Sapphire: Earned 20,000,000 credits (42,604,648)SR5 LLR Jade: Earned 10,000,000 credits (11,829,173)SGS LLR Ruby: Earned 2,000,000 credits (2,851,612)TRP LLR Ruby: Earned 2,000,000 credits (4,400,010)Woodall LLR Turquoise: Earned 5,000,000 credits (5,046,412)321 Sieve (suspended) Jade: Earned 10,000,000 credits (10,057,614)Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (11,209,718)Generalized Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,005,451)PPS Sieve Emerald: Earned 50,000,000 credits (52,049,707)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,341,676)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,070,804)AP 26/27 Jade: Earned 10,000,000 credits (10,742,251)GFN Emerald: Earned 50,000,000 credits (50,005,964)WW (retired) Ruby: Earned 2,000,000 credits (2,688,000)PSA Double Gold: Earned 500,000,000 credits (728,547,693)
Message 111053 - Posted: 30 Oct 2017 | 7:19:22 UTC

D0 is the default unless you specify some other value.

ID: 111053 | Report as offensive

Message boards : Sieving : Question about multiple GPU's in the same machine

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