AMD RX Vega

Post requests to add new GPUs to the official whitelist here.

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Re: AMD RX Vega

Postby monkeyclaw » Sat Aug 19, 2017 8:52 pm

So hey! I might (just maybe) actually have someone willing to try folding on a Vega64 LCE. Only thing is that it is I'm not sure if it is added to the whitelist yet... does anyone know where to check the current whitelist? And, this topic: viewtopic.php?f=83&t=26208 is still the fastest/quickest way to get a card whitelisted, right? How long does it normally take for the whitelist to become updated after a request has been submitted?

Thanks!
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Re: AMD RX Vega

Postby monkeyclaw » Sat Aug 19, 2017 8:59 pm

Sorry to butt in, but would this ID also work for other Vega SKUs, specifically the liquid-cooled edition, or is that not added in yet?
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Re: AMD RX Vega

Postby Joe_H » Sat Aug 19, 2017 9:46 pm

If AMD used the same ID number for the other models, then yes. The Information topic here in this subforum gives some methods of determining what device ID an installed card has.

That topic also gives a link to the current GPUs.txt file. The few persons who can add to that file usually post here once a new device ID and card description have been added.
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Re: AMD RX Vega

Postby Senture » Mon Aug 21, 2017 1:13 pm

Thanks very much for adding the card in. I have the water cooled RX Vega 64 card. I would Imagine the air cooled RX Vega cards will have the same device ID string. The only thing different between them is the BIOS which has an increased clock speed and power limit on the water cooled edition.

There is a grammatical error in the device string. The line reads "0x1002:0x687f:1:5:[Radeon Rx vega" but it should be "0x1002:0x687f:1:5:[Radeon RX Vega]". Nothing important, but looks a little out of place :)
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Re: AMD RX Vega

Postby Joe_H » Mon Aug 21, 2017 3:04 pm

I just looked at the latest GPUs.txt file, there are two different device ID entries for Vega at this point. The first is for the FE version released back in June, once the Vega 56 is released next week and someone supplies a device ID, that can be added.

Possibly the entry for the RX Vega would be corrected at that time, I suspect it was added from a mobile device. That portion of the entry is just "cosmetic", does not affect getting WU's.
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Re: AMD RX Vega

Postby monkeyclaw » Sun Sep 17, 2017 3:16 pm

Has anyone added/corrected the Vega 56/64 IDs in yet? Still haven't heard of any Vega GPUs in action for folding.
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Re: AMD RX Vega

Postby Joe_H » Sun Sep 17, 2017 3:25 pm

The Vega 64 entry is still the same, no one has yet provided a device ID for a Vega 56. There is one person posting here who has run into driver problems, GPU still consuming power after folding paused.
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Re: AMD RX Vega

Postby rhavern » Thu Sep 21, 2017 1:21 pm

foldy wrote:Hope it is not my chart... I check it. No it says 115k PPD for gtx 950 but that may not be perfect accurate either.
https://docs.google.com/spreadsheets/d/ ... edit#gid=0


Nice spreadsheet, I do something similar but instead of PPD, I use the output of FAHbench as it eliminates the variation in projects and you can get useful comparison numbers before gpus.txt gets updated. Note that most projects use explicit single precision, so I do exp1/watt and exp1/<unit of currency> for comparison.
Last edited by rhavern on Thu Sep 21, 2017 2:50 pm, edited 1 time in total.
Folding since 1 WU=1 point
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Re: AMD RX Vega

Postby foldy » Thu Sep 21, 2017 1:34 pm

@rhavern: Is your sheet public?
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Re: AMD RX Vega

Postby rhavern » Thu Sep 21, 2017 2:27 pm

@foldy: Just for you, it is now. ;-)

https://docs.google.com/spreadsheets/d/ ... sp=sharing

Note: I haven't been able to find any FAHbench data on the RX vega 64 liquid model.
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Re: AMD RX Vega

Postby foldy » Thu Sep 21, 2017 3:47 pm

FahBench for vega liquid could be estimated just by multiply with the increased GPU clock factor.
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Re: AMD RX Vega

Postby bruce » Thu Sep 21, 2017 6:39 pm

rhavern wrote:I use the output of FAHbench as it eliminates the variation in projects and you can get useful comparison numbers before gpus.txt gets updated. Note that most projects use explicit single precision, so I do exp1/watt and exp1/<unit of currency> for comparison.

Question: Does anybody know if single/double precision applies to the CPU and/or the GPU?

Fact: The GPU cores are compiled to use what's called "mixed precision" by the OpenMM folks. A very large percentage of the calculations use single precision but some specific calculations require double. Early GPUs did not support double although almost all recent GPUs do. That means the core must somehow choose whether to use the GPU to do those double precision calculations or to somehow off-load that calculation to the CPU.

(I'm not sure how the logic of that choice works or how it might affect FAHBench. If somebody wants to dig into the OpenMM source and tell us, it would be appreciated.)
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Re: AMD RX Vega

Postby rhavern » Fri Sep 22, 2017 8:43 am

That's some useful and interesting data, Bruce. It'll be interesting to see if anyone knows the answer.
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