memory for budget machine

[wombatman]

Probably not a bad idea to use some compressed air and blow out any dust. That's made up to a 10-15C temperature difference for me.

[kladner]

At a minimum, if it is a closed case, you should have an intake and exhaust fan. The Noctua cooler is excellent, but it can't cool below the in-case ambient temperature.

[Batalov]

It is like buying the top of the line portable air conditioner, setting up in the middle of your room (without connecting exhaust anywhere) and wondering why is it getting only hotter in the room...

[wildrabbitt]

I took of the side panel and now it doesn't switch off.

I can't risk getting complaints from the neighbours about noise levels so I can't use fans (BTW).

[Mark Rose]

Quiet fans exist. I've had good luck with the Silent Series from Fractal Design. I'm picky about noise. They're quieter than a mechanical hard drive.

[wildrabbitt]

Cool. I'll have to get some when I next have some money.

Can anyone tell me the answer to this :

When setting the worker threads options in mprime under linux, it asks how many CPU's to use for a worker.

Does that mean CPU-cores or whole CPU's ?

I switched from 6 workers to 3 (because I've been advised to) and I set CPU's to 2 each for the three workers.

[kladner]

Originally Posted by wildrabbitt

Cool. I'll have to get some when I next have some money.

Can anyone tell me the answer to this :

When setting the worker threads options in mprime under linux, it asks how many CPU's to use for a worker.

Does that mean CPU-cores or whole CPU's ?

I switched from 6 workers to 3 (because I've been advised to) and I set CPU's to 2 each for the three workers.

It means cores.

One other thing I would recommend on this kind of AMD chip- when you make worker assignments, make sure the pairs of integer cores are sharing an FPU. On my 8350, this means assigning every other worker in addition to setting 2 threads. It should end up so that cores 1 and 2, 3 and 4, and so on are associated. Assign the odd numbers on your two thread workers. Qualifier: I don't know if things work the same way with Linux and Mprime.

I run P-1 on the remaining four cores. I tried doubling up on them, but it did not come close to saturating those cores, so those are running single thread.

[wildrabbitt]

I could copy you on my FX9370. It's got 8-cores like yours and is running windows.

Can you tell me what to do if I want 4 LL tests going on?

I vaguely understood what you were talking about.

[fivemack]

Originally Posted by kladner

It means cores.

One other thing I would recommend on this kind of AMD chip- when you make worker assignments, make sure the pairs of integer cores are sharing an FPU. On my 8350, this means assigning every other worker in addition to setting 2 threads. It should end up so that cores 1 and 2, 3 and 4, and so on are associated. Assign the odd numbers on your two thread workers. Qualifier: I don't know if things work the same way with Linux and Mprime.

I run P-1 on the remaining four cores. I tried doubling up on them, but it did not come close to saturating those cores, so those are running single thread.

I could see running something like GMP-ECM on the threads that would be sharing a FPU, but isn't p-1 also a floating-point-intensive job?

[wildrabbitt]

On my 8350, this means assigning every other worker in addition to setting 2 threads. It should end up so that cores 1 and 2, 3 and 4, and so on are associated.

So worker 1 and 3 are doing LL tests?

It should end up so that cores 1 and 2, 3 and 4, and so on are associated.

You mean 1 is associated with 2 and 3 with 4 or 1 with 3 and 2 with 4? What do you mean by associated?

[kladner]

Originally Posted by wildrabbitt

So worker 1 and 3 are doing LL tests?



You mean 1 is associated with 2 and 3 with 4 or 1 with 3 and 2 with 4? What do you mean by associated?

Sorry for the imprecise description. I have LL set on 1 and 3. 2 and 4 run as helper threads. Put exactly:

Worker Windows set to 6
Worker 1, Core 1, DC, 2 threads, Core 2 becomes the helper
Worker 2, Core 3, LL, 2 threads, Core 4 becomes the helper
Worker 3, Core 5, P-1, 1 thread
Worker 4, Core 6, P-1, 1 thread
Worker 5, Core 7, P-1, 1 thread
Worker 6, Core 8, P-1, 1 thread

After the current discussion, I may try again with 2 thread P-1 workers. At that point, Worker Windows will be 4.
Workers 1 and 2 remain as above. (with cores 1-4)
Worker 3, Core 5, P-1, 2 threads, Core 6 is the helper
Worker 4, Core 7, P-1, 2 threads, Core 8 helper

With a hex core processor the same pattern will work. That is, set a worker to an odd core, two threads, and the next even core will be the helper.