@RE: you're right, I was checking latest used-R7 prices on Amazon, saw "Radeon Pro" and the $1499 price and early-August, and assumed it was the Pro VII, figuring if anyone could get it cheaper and earlier than other retailes, it would be mighty Amazon.

Thx also for the clarification re. the liquid-cooled one.

[QUOTE=ewmayer;545397]And if the Pro finds a market, we can hope that the older R7s will start coming onto the used-gear market in decent volume, thus pushing prices for those down a bit. Or am I being overoptimistic?[/QUOTE]Despairing of finding Radeon VIIs at acceptable prices used, or available at all new except by the $1000+ scalper crowd, I've begun to look at Vega 64 etc. Vega 64 are being bid up above $300 used on eBay, which seems a premium above their GhzD/day abilities.

What's the expected increase in performance when moving from Windows 10 to Linux with ROCm, in percents?

[QUOTE=Viliam Furik;558134]What's the expected increase in performance when moving from Windows 10 to Linux with ROCm, in percents?[/QUOTE]Needs testing on same system, clock rates, fft, and assignment, but a rough estimate is at 5M fft, George Woltman's 510 GhzD/day linux vs my 480 on Win10, ~6%. I haven't seen any posted figures elsewhere. George has reported being able to run 1200Mhz memory clock. I think my results were from somewhere in 1100-1160. Other gpu tuning should also be documented and comparable; gpu clock, fan curve, power limit etc. Please make your own comparison tests and let us know what you find.

Picked up a Radeon Pro VII for ~$400.... excited to put it to work!

[QUOTE=Magellan3s;619488]Picked up a Radeon Pro VII for ~$400.... excited to put it to work![/QUOTE]

Use Linux. Holler if you need help maximizing it for performance or energy efficiency.

[QUOTE=Prime95;619489]Use Linux. Holler if you need help maximizing it for performance or energy efficiency.[/QUOTE]

PM SENT!

Other GPUs from the RadeonVII family, just as old, that with a bit of luck may be had for cheaper are "Radeon Instinct" MI60 and MI50. They are about as powerful as R7, maybe a bit faster even. They have 32GB of RAM (MI50 also has a 16GB variant) and full ECC.

The main drawback is that they have no fan! (but they absolutely need one)
But with a bit of tinkering a fan contraption can be added to one end of the GPU, with some sort of adapter. (also needed: fan, and fan power supply e.g. from the motherboard)

For GpuOwl ATM we don't need either the large VRAM (32GB) or the ECC. Maybe in the future.
The ECC is useful for the parts of computation that are not error-checked, which as an example would be second-stage P-1 (which BTW GpuOwl does not run anymore).

PS:
If anybody is trying to boot such GPUs (MI50, MI60) in Linux, you may need to add the "pci=realloc" kernel argument if the GPU is not initialized properly.