Cpu w/ prime95 and gpu cumputing att same timme

Thecmaster · 2019-03-12, 10:49

Is it possible to have prime95 and mlucas at the same time. I have right now a Ryzen 5 1600x cranking numbers with prime95, 1 worker on 6 cores, and I have a gtx 960 that I want to run to. How much cpu do I need to run the gpu. Can I run both at the same time. Or should I just run one of them?

Uncwilly · 2019-03-12, 12:47

You can use your CPU and GPU at the same time.

Yes, use Prime95 (or mprime for linux).
But for your GPU, instead of mlucas, there are different programs to use.
GPU's are killer at Trial Factoring. Some are good for LL testing. But factoring is where they shine.

This thread https://mersenneforum.org/showthread.php?t=22450 in the GPU Computing forum tells you which program does which for which type of card. There are threads for each of the types of testing.

Thecmaster · 2019-03-12, 12:52

Quote:

Originally Posted by Uncwilly

You can use your CPU and GPU at the same time.

Yes, use Prime95 (or mprime for linux).
But for your GPU, instead of mlucas, there are different programs to use.
GPU's are killer at Trial Factoring. Some are good for LL testing. But factoring is where they shine.

This thread https://mersenneforum.org/showthread.php?t=22450 in the GPU Computing forum tells you which program does which for which type of card. There are threads for each of the types of testing.

Thanx. I have been reading those threads and didn't find anything about cpu and gpu at the same time. I will get my head in to GPU computing sometime next week.

Ty for answer.
/Thecmaster

kriesel · 2019-03-12, 13:04

See https://www.mersenneforum.org/forumdisplay.php?f=154. I recommend starting with the Mersenne Prime gpu computing reference thread (sticky at the top), post 2, pdf attachment. The gpu applications use a gpu nearly fully, while using very little cpu. The exceptions to that are startup, saving intermediate results to disk, producing screen output, and some occasional computation portions like gcd in CUDAPm1, which use the cpu. The effect of the one cpu core usage of CUDAPm1 gcd is to pause temporarily one prime95/mprime worker.

nomead · 2019-03-12, 16:51

Yes, running Ryzen 3 2200G and RTX 2080 - mprime on the CPU and mfaktc or CUDALucas on the GPU. There is a very small slowdown on mprime when the GPU task is running, especially mfaktc on a lot of short runs, but it's maybe 1% or less, so it's pretty much worth ignoring. There is no effect the other way around though, stopping or running mprime has no effect on GPU performance.

Thecmaster · 2019-03-12, 22:40

Thanx for all help. I have some to read. I got in contact with one from gpu 72 and thay promised to help me get going.

This fast response and kindness and wanting to help makes me more eager to get going and helping more in the hunt. You all are so nice to newcomers like me. Keep that up.

/ThecMaster

2019-03-12, 10:49	#1
Thecmaster "Arvid Björklin" Apr 2016 Pitea, Sweden 2·5·7 Posts	Cpu w/ prime95 and gpu cumputing att same timme Is it possible to have prime95 and mlucas at the same time. I have right now a Ryzen 5 1600x cranking numbers with prime95, 1 worker on 6 cores, and I have a gtx 960 that I want to run to. How much cpu do I need to run the gpu. Can I run both at the same time. Or should I just run one of them?

2019-03-12, 12:47	#2
Uncwilly 6809 > 6502 """"""""""""""""""" Aug 2003 101×103 Posts 2²×2,767 Posts	You can use your CPU and GPU at the same time. Yes, use Prime95 (or mprime for linux). But for your GPU, instead of mlucas, there are different programs to use. GPU's are killer at Trial Factoring. Some are good for LL testing. But factoring is where they shine. This thread https://mersenneforum.org/showthread.php?t=22450 in the GPU Computing forum tells you which program does which for which type of card. There are threads for each of the types of testing.

2019-03-12, 13:04	#4
kriesel "TF79LL86GIMPS96gpu17" Mar 2017 US midwest 2⁴×3×163 Posts	See https://www.mersenneforum.org/forumdisplay.php?f=154. I recommend starting with the Mersenne Prime gpu computing reference thread (sticky at the top), post 2, pdf attachment. The gpu applications use a gpu nearly fully, while using very little cpu. The exceptions to that are startup, saving intermediate results to disk, producing screen output, and some occasional computation portions like gcd in CUDAPm1, which use the cpu. The effect of the one cpu core usage of CUDAPm1 gcd is to pause temporarily one prime95/mprime worker.

2019-03-12, 16:51	#5
nomead "Sam Laur" Dec 2018 Turku, Finland 13D₁₆ Posts	Yes, running Ryzen 3 2200G and RTX 2080 - mprime on the CPU and mfaktc or CUDALucas on the GPU. There is a very small slowdown on mprime when the GPU task is running, especially mfaktc on a lot of short runs, but it's maybe 1% or less, so it's pretty much worth ignoring. There is no effect the other way around though, stopping or running mprime has no effect on GPU performance.

2019-03-12, 22:40	#6
Thecmaster "Arvid Björklin" Apr 2016 Pitea, Sweden 2×5×7 Posts	Thanx for all help. I have some to read. I got in contact with one from gpu 72 and thay promised to help me get going. This fast response and kindness and wanting to help makes me more eager to get going and helping more in the hunt. You all are so nice to newcomers like me. Keep that up. /ThecMaster