What are you thoughts about AMD A10-7860K

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Hal Bregg
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#1 What are you thoughts about AMD A10-7860K

Unread post by Hal Bregg » Thu Apr 11, 2019 4:54 pm

As in the subject, what do you think about this CPU?

Would it be good enough to crunch some projects involving GPU? And what motherboard would be good for it?
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#2 Re: What are you thoughts about AMD A10-7860K

Unread post by davidBAM » Thu Apr 11, 2019 5:56 pm

I don't know the CPU at all, sorry but I have noticed that GPU projects differ greatly in the demands they place on the CPU.

Collatz uses barely any CPU even on fast nVidia cards. PrimeGrid, on the other hand, uses virtually 100% of a CPU core to keep the same GPU running. I suspect a slowish CPU on PrimeGrid would actually mean some GPUs were being 'held back'
I think this is fool-proof but could you just try it for me please? • There are 10 types of people in the world; those who understand binary, and those who don’t
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#3 Re: What are you thoughts about AMD A10-7860K

Unread post by Hal Bregg » Thu Apr 11, 2019 6:43 pm

I was wondering if intergrated GPU in this processor would be suitable at all for crunching for example Einstein, MooWrapper or Asteroid@home.
I wasn't planning to crunch for PrimeGrid or Collatz at the moment so I am not bother too much about it.

What I like about this CPU is that its TDP is 65W plus it has got integrated GPU which hopefully would be suitable for crunching.
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#4 Re: What are you thoughts about AMD A10-7860K

Unread post by scole of TSBT » Thu Apr 11, 2019 9:04 pm

Hopefully [mention]Dirk Broer[/mention] will chime in. He knows as much about AMD CPUs as anyone. You'll have to find/install an OpenCL driver for that GPU.
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#5 Re: What are you thoughts about AMD A10-7860K

Unread post by Dirk Broer » Thu Apr 11, 2019 10:05 pm

Provided that you run Windows, the IGP of the AMD A10-7860K may very well be used for almost all projects that involve GPU crunching, just do not expect miracles.
(Though, on a side note: I personally have crunched MilkyWay GPU WUs using the IGP of my A10-5700 -and those require double precision....)
I presently run Collatz on the IGP of my A12-9800E -using the AMD-supplied drivers, not the proverbial Windows-supplied s#!t.

For several years my staple diet of credits was supplied by the IGP of my A8-3870K, which was coupled to two HD 6670's to crunch three WUs of Moo! at a time.
The IGP of my A8-3820 was coupled to another HD 6670 to run another two, while the Socket AM1 Athlon 5350's IGP ran yet another one. I virtually was 80% of AMD Users Moo! output for a time.

But right now I do a mix of PrimeGrid, Collatz and Moo! -be it that PrimeGrid is done by 'real' GPUs -from days past: A Geforce GT 650 and a HD 7790
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#6 Re: What are you thoughts about AMD A10-7860K

Unread post by Hal Bregg » Sat Apr 13, 2019 10:14 pm

Thanks for chipping in, Dirk.
I guess I would use Window 10 by transplanting existing HDD from currently in use old PC with dual core Athlon.
Definitely it would greatly improve my crunching power and no miracles expected.

How many core I would be able to utilize in this CPU?

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#7 Re: What are you thoughts about AMD A10-7860K

Unread post by Dirk Broer » Sun Apr 14, 2019 9:59 am

Hal Bregg wrote:
Sat Apr 13, 2019 10:14 pm
How many core I would be able to utilize in this CPU?
Ha! That's a trick question, which can be parried with 'Integer or floating point?'. The A10-7860K has two 'Steamroller' modules, with two Integer cores and one Floating Point core each.
The system sees the two 'Steamroller' modules as four cores though, and you can run four CPU WUs at a time (unless you choose a GPU project that wants support of a full CPU core).

Note that the Bulldozer-family of APUs (like the K10 and Brazos APU family before them and the low-power Jaguar APU family) does not have a L3 Cache, which hampers some projects.
Just do not try to run four SRBase long WUs along each other.

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#8 Re: What are you thoughts about AMD A10-7860K

Unread post by Hal Bregg » Sun Apr 21, 2019 10:12 pm

By saying 'intiger or floating point' have you got in mind specific projects?

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#9 Re: What are you thoughts about AMD A10-7860K

Unread post by Dirk Broer » Mon Apr 22, 2019 1:23 am

No, I did not mean specific projects, but I do know that for certain PrimeGrid or SRBase apps Intel CPUs are better suited.
AMD's module approach sounded great in theory but may have been years ahead of its time, as only with the present Zen APUs there seems to be the level of integration needed.
I am quite happy with the IGP of my A12-9800E by the way, doing more than half of the work at the present Seti@Home Beta challenge (out of three GPU's working on it).
Normally I let it crunch Collatz or Moo!.

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