Thursday, November 28th 2019

AMD Radeon "Navi" OpenCL Bug Makes it Unfit for SETI@Home

A bug with the Radeon RX 5700-series "Navi" OpenCL compute API ICD (installable client driver) is causing the GPUs to crunch incorrect results for distributed compute project SETI@Home. Since there are "many" Navi GPUs crunching the project cross-validating each others' incorrect results, the large volume of incorrect results are able to beat the platform's algorithm and passing statistical validation, "polluting" the SETI@Home database. Some volunteers at the SETI@Home forums, where the the issue is being discussed, advocate banning or limiting results from contributors using these GPUs, until AMD comes out with a fix for its OpenCL driver. SETI@Home is a distributed computing project run by SETI (Search for Extraterrestrial Intelligence), tapping into volunteers' compute power to make sense of radio waves from space.
Sources: SETI@Home Forums, AMD Community, TH1813254617 (Reddit)
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32 Comments on AMD Radeon "Navi" OpenCL Bug Makes it Unfit for SETI@Home

#26
W1zzard
Delta color compression is lossless
Posted on Reply
#27
Steevo
W1zzardDelta color compression is lossless
Good point, I was wondering and just took a shot at what it might be. Possibly a call that results in rounding where there should be none in it's OpenCL that isn't experienced in F@H or other open CL apps? Or is it an actual hardware issue? Hard to believe AMD would let a die now used for pro series cards out with known issues, but that is just my opinion.
Posted on Reply
#28
R-T-B
_FlareThats a feature to stop non-gaming misusage.
Oh, compute bad? lol
Posted on Reply
#29
Midland Dog
more
SteevoBy cheap you mean made by the world's second largest X86-64 CPU and GPU manufacturer using more advanced process nodes than their competition?

I doubt there is anything wrong with the card or GPU it's probably a simple issue where the driver applies compression to data that shouldn't be compressed with the same algorithm that compresses color data.
advanced nodes still cant win, thats like me bringing a 99999 litre v8 and getting gapped by a pushbike, try again
Posted on Reply
#30
Vya Domus
Midland Dogadvanced nodes still cant win, thats like me bringing a 99999 litre v8 and getting gapped by a pushbike, try again
Please put a spoiler over your comment, we don't want to lose brain cells reading this by accident, it's just not fair.
Posted on Reply
#31
Midland Dog
rtg should be miles ahead of nvidia, navi is just as inneficient as any amd card. polaris = 980 competitor with similar power characteristics, navi = 1080 (oc) competitor with MORE power draw on a NEWER node
Posted on Reply
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