Radeon VII (2nd gen consumer Vega GPU)

[PhilF]

Originally Posted by paulunderwood

Have you considered running Linux and the ROCm drivers? You would get more crunching done, I am interested in why you would not switch to Linux. Is this a desktop box? Or is it a lack of will to switch?

Actually, I do have several Linux boxes, but this card's crunching capability comes in second behind other duties as the primary video card in my primary Windows 10 workstation.

If the card and/or AMD drivers turns out to be problematic under Windows 10 (highly likely), I will switch back to my old NVidia 3GB 1060 card, then definitely move the Radeon VII to a Linux box.

EDIT: Well, lol, less than 10 minutes after posting this my Windows 10 rebooted. I can already tell this experience parallels what I have experienced for decades now: AMD hardware is fine, but their drivers suck!

I am now re-scheming my installation to fit the Radeon VII into a Linux environment. I don't even know what ROCm is yet. Time to research...

Your timing was great, lol! :)

[paulunderwood]

Originally Posted by PhilF

Actually, I do have several Linux boxes, but this card's crunching capability comes in second behind other duties as the primary video card in my primary Windows 10 workstation.

If the card and/or AMD drivers turns out to be problematic under Windows 10 (highly likely), I will switch back to my old NVidia 3GB 1060 card, then definitely move the Radeon VII to a Linux box.

EDIT: Well, lol, less than 10 minutes after posting this my Windows 10 rebooted. I can already tell this experience parallels what I have experienced for decades now: AMD hardware is fine, but their drivers suck!

I am now re-scheming my installation to fit the Radeon VII into a Linux environment. I don't even know what ROCm is yet. Time to research...

Your timing was great, lol! :)

FFT 5632K @ 758 us/it. That is with undervolting, a high sclk (5), overlocked RAM, and fans at 170. the ATX case is on its side with the side panel removed all on a cool night. It took a few tests to get the undervolting right -- but it now seems to run Gerbicz error-free. 21 hours per test at ~99 million bits

ROCm was in my Debian repository. I can't get any video output for some reason. I just ssh into it.

[dcheuk]

I'm not sure if I'm the only one that is experiencing this but my Radeon VII is going crazy after installing the adrenaline 2019.12.2 (2020 edition) driver update. Lots of screen tearing / spots.

I thought it was my GPU dying but an uninstall reverted all the problems.

[PhilF]

Originally Posted by dcheuk

I'm not sure if I'm the only one that is experiencing this but my Radeon VII is going crazy after installing the adrenaline 2019.12.2 (2020 edition) driver update. Lots of screen tearing / spots.

I thought it was my GPU dying but an uninstall reverted all the problems.

Good luck fiddling with AMD's Windows drivers. They are a piece of cra...

Oops, my mom taught me long ago that if you don't have anything good to say then don't say anything at all.

[Prime95]

revisiting running two instances:

I have been running 1 instance at sclk 4 mem 1200. Iteration times are 692us on a 5M FFT.

If I run 2 instances, combined throughput is 635us vs 692us, but 85 temp 196 watts vs. 82 temp 182 watts (9.0% faster, 7.7% more power)

If I run one instance at a faster clock (sclk 5): 655us 88 temp 219 watts (5.6% faster, 20.3% more power)

If I run one instance at a slower clock (sclk 3): 751us 70 temp 150 watts (7.9% slower, 17.6% less power)

So my previous advice of running one instance is no longer true. It once again seems beneficial to run 2 instances.

[kriesel]

Originally Posted by Prime95

revisiting running two instances:

I have been running 1 instance at sclk 4 mem 1200. Iteration times are 692us on a 5M FFT.

If I run ...

sclk2? Extrapolating what you posted, 2 gpus running on ~250W total, ~1.7x throughput of one.
What version gpuowl were those data for?

[Prime95]

Version gpuowl v6.11-120-g0d8ee5a-dirty (about 2 months old) on rocm 2.10

[M344587487]

Apparently a Radeon Pro VII is coming out at some point, largely the same as Radeon VII but with double the FP64 performance per clock and slightly lower clocks to target a lower TDP. It'll be at least twice as expensive as a Radeon VII as it's a pro card, probably more than that as it'll be around the top end of the pro line. The Infinity Fabric Link to link cards with 168GB/s bandwidth is interesting technically but not practically for our use case.



https://videocardz.com/newz/amd-anno...ty-fabric-link

[kriesel]

Originally Posted by M344587487

Apparently a Radeon Pro VII is coming out at some point, largely the same as Radeon VII but with double the FP64 performance per clock and slightly lower clocks to target a lower TDP. It'll be at least twice as expensive as a Radeon VII as it's a pro card, probably more than that as it'll be around the top end of the pro line. The Infinity Fabric Link to link cards with 168GB/s bandwidth is interesting technically but not practically for our use case.

https://videocardz.com/newz/amd-anno...ty-fabric-link

Thanks. I saw Radeon VIIs available from Best Buy for $549, hesitated, and they were sold out within hours. Maybe waiting isn't so bad...

[kriesel]

Anandtech article says Radeon Pro VII shipping mid June. $1899, 6.5 FP64 TFlops $292/Tflops, vs. Radeon VII $699 3.5 $200/TFlops. https://www.anandtech.com/show/15777...radeon-pro-vii

[xx005fs]

Originally Posted by kriesel

Anandtech article says Radeon Pro VII shipping mid June. $1899, 6.5 FP64 TFlops $292/Tflops, vs. Radeon VII $699 3.5 $200/TFlops. https://www.anandtech.com/show/15777...radeon-pro-vii

Actually not bad when considering brand new, but the pro cards can't be overclocked so it will for sure be memory bound. However, RVII looks to be a much better deal when buying used.