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Number crunching :
Why do ATI gpu's have arround 8 variations for GPU processing?
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Tom M Send message Joined: 28 Nov 02 Posts: 5124 Credit: 276,046,078 RAC: 462 |
I will admit it has been more than a year since I played with any ATI-based video processors (mostly embedded ones I believe). And I haven't stopped to wonder why there were so many variations. All though I have no intention of running out and getting some ATI cards (budget limitations) I am still curious. Thank you. Tom A proud member of the OFA (Old Farts Association). |
BilBg Send message Joined: 27 May 07 Posts: 3720 Credit: 9,385,827 RAC: 0 |
https://setiathome.berkeley.edu/apps.php The applications (.exe variants) are only 3 opencl_ati_ - for all ATI AMD >= HD 4xxx opencl_ati5_ - "normal" variant for all ATI AMD >= HD 5xxx opencl_ati5_SoG - SoG variant for all ATI AMD >= HD 5xxx Every one of those 3 apps have 3 <plan_class>es (for a total of 3*3=9) http://setiweb.ssl.berkeley.edu/beta/plan_class_spec.xml Driver version 13.1 is bad so the server have to avoid computers with Catalyst 13.1 http://www.hal6000.com/seti/boinc_ati_gpu_cheat_sheet.htm The same app (.exe) may be sent to Catalyst 11.12 ... 12.10 (i.e. < 13.1) by <plan_class> ending by _sah or _SoG and to Catalyst 13.4+ (i.e. > 13.1) by <plan_class> ending by _cat132 This way the bad Catalyst 13.1 is avoided. <plan_class> ending by _nocal is to detect GPUs or drivers which do not report/support CAL (AMD dropped CAL in favour of OpenCL) Note: If BOINC supported something like: <bad_opencl_driver_revision>108440</bad_opencl_driver_revision> ... the number of <plan_class>es could be reduced   - ALF - "Find out what you don't do well ..... then don't do it!" :)  |
Tom M Send message Joined: 28 Nov 02 Posts: 5124 Credit: 276,046,078 RAC: 462 |
I just picked up an A6-7310 with an "R4" gpu. It is running under a stock Win10 OS. I haven't tried installing any older drivers. Boinc/Seti is downloading and running "open_cl_nocal" I assume it makes sense so the question is something like I thought "nocal" meant gpu tasks couldn't be run? Apparently I am wrong. So the other question is, if running a backlevel gpu driver will speed up processing, what is the recommended non-current ATI driver? Thanks, Tom A proud member of the OFA (Old Farts Association). |
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