Queegeh
Newbie
 Offline
Activity: 37
Merit: 0
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October 15, 2013, 07:45:51 AM |
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An R9 280X has been added to the hardware comparison page. With OpenGL, it's either as good as the original 7970s or better. At this point, it seems to be way better than the 7970s. It looks like whatever they changed has fixed the original 7970 issues. https://litecoin.info/Mining_hardware_comparisonI get 750 kh/s with my Sapphire 7970s (w/ default firmware, 1080 engine, 1500 mem, I 13) They're getting 740 kh/s on the 280x at 1100/1500. Obviously the same chip...so I wouldn't expect much different I suppose...but still a bit disappointing. The driver is in beta still, so you can say it's a fail yet. HD 7970 is a mature product and the R9 280X is still in it infancy. The price is the same as any other HD 7970 and will eventually drop over time. The driver is not in beta, the driver released for review testing and BF4 is a beta. The R9 280x IS a 7970, they are XT2 boards and have nothing other than a flashed bios and a different cooler. To think you will see any increased performance over a 7970 is crap and there is nothing at all infant about the R9 280x. ALL 7970s (R9 280x) can push over 720Kh/s - The main difference between cards ignoring gpu/mem clocks is the configuration of 3 key miner settings: --gpu-threads --thread-concurrency --Intensity Some 7970's especially older ones do best on a single gpu thread with a high thread-concurrency and intensity. eg, "--gpu-threads 1 --thread-concurrency 24000 --intensity 19" A lot of newer boards (GHz editions) including the rebranded R9 280x do best with two gpu threads and a lower thread-concurrency and intensity eg, "--gpu-threads 2 --thread-concurrency 8192 --intensity 13" (have also found an odd thread concurrency such as 8191 give even better results) I have personally tested this on several 7970 boards and even 7950s are affected the same way. No BIOS flashing or modding has ever been needed just a correct miner configuration and the right gpu/mem clock ratio which I have found to be very different on some cards simply because of the type of ram used and the different timings some memory chips run at which is why some users get lucky with low mem frequencies and others simply do not. Bear in mind also that the R9 280 (non x variant) if and when its released will be a re-branded 7950 so could turn out to be a very good bang for buck card. Avoid the R9 270x as this is just a re-branded 7870, again the non x variant will be a rebrand of the 7850. Do enjoy your AMD re-branded kit while we wait to see if the real news here the R9 290x will be a mining king.  |
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ivanlabrie
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October 15, 2013, 10:16:01 AM |
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7970 giga,sapphire,powercolor,his,asus..all of them can run with I13..and with edited bios  ) How did you edit it? I couldn't figure out how to improve mining speeds on my giga cards. Using the tpu editor right? WHat values? Which bios version do you have I don't have it anymore but it was a rev 1.0 unlocked Gigabyte Windforce OC 7970...and before I had a HIS IceQ X2 7950 without boost. Tried many bios flashes and it never got better. Never tried 8191 for tc, always used 8192 or higher xD, and got hw or lower perf when doing more than i 13 (despite the high tc and available system ram ->8gb ddr3) |
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hulk
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October 15, 2013, 02:50:53 PM |
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Anybody manage to give R9 270x a try? any better then the old HD 7950?
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B.T.Coin
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October 15, 2013, 04:05:07 PM |
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Anybody manage to give R9 270x a try? any better then the old HD 7950?
The R9 270X is NOT a rebranded 7950 but it is a rebranded 7870. I haven't tested it myself but I guess it's safe to say it will not perform as good as a 7950. |
A fine is a tax you pay for something you did wrong.
A tax is a fine you pay for something you did right.
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Queegeh
Newbie
Offline
Activity: 37
Merit: 0
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October 15, 2013, 04:09:17 PM |
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7970 giga,sapphire,powercolor,his,asus..all of them can run with I13..and with edited bios ) How did you edit it? I couldn't figure out how to improve mining speeds on my giga cards. Using the tpu editor right? WHat values? Which bios version do you have I don't have it anymore but it was a rev 1.0 unlocked Gigabyte Windforce OC 7970...and before I had a HIS IceQ X2 7950 without boost. Tried many bios flashes and it never got better. Never tried 8191 for tc, always used 8192 or higher xD, and got hw or lower perf when doing more than i 13 (despite the high tc and available system ram ->8gb ddr3) If you use -g 2 (gpu-threads 2) then anything over intensity of 13 will HW error. If you want to use higher intensities of 18-20 use 1 gpu thread and a high thread concurrency. |
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ivanlabrie
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October 15, 2013, 07:28:04 PM |
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7970 giga,sapphire,powercolor,his,asus..all of them can run with I13..and with edited bios ) How did you edit it? I couldn't figure out how to improve mining speeds on my giga cards. Using the tpu editor right? WHat values? Which bios version do you have I don't have it anymore but it was a rev 1.0 unlocked Gigabyte Windforce OC 7970...and before I had a HIS IceQ X2 7950 without boost. Tried many bios flashes and it never got better. Never tried 8191 for tc, always used 8192 or higher xD, and got hw or lower perf when doing more than i 13 (despite the high tc and available system ram ->8gb ddr3) If you use -g 2 (gpu-threads 2) then anything over intensity of 13 will HW error. If you want to use higher intensities of 18-20 use 1 gpu thread and a high thread concurrency. I know, I've tried both, and understand the process...but don't get why that card sucked so bad at mining scrypt. |
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akipfer
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October 24, 2013, 12:54:37 PM |
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I might be wrong but Mandle seems a replacement for direct3d/opengl and not opencl(/cuda) as one usually need for GPGPU stuff like coin hashing. If so it would be like using 3d gfx api for mining. So I doubt Mantle will change much.
we don't need to use OpenCL for hashinh, any language can do the job, at least most of them... mantle has way, way 'less loss' in in cycles, memory bandwitdh and tons of other stuffs that other apis still have today. so yest, it is possible to use new mantle, but as he sayd, some one need to write down a miner that uses that, as when is finished, we should get the 'is it better or not for mining bitcoin/altcoins' but i think will be for sure... Sorry for long quote! |
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exnom
Member
Offline
Activity: 98
Merit: 10
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October 24, 2013, 07:28:17 PM |
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If it's like the HD 7970, it can do I=18, even I=20....But on average, most single GPU cards can do at least I=18...I do I=80 on my 2x HD 5870's and HD 5850...
I=80!? |
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cowandtea
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October 25, 2013, 12:57:17 AM |
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If it's like the HD 7970, it can do I=18, even I=20....But on average, most single GPU cards can do at least I=18...I do I=80 on my 2x HD 5870's and HD 5850...
I=80!? He's a failed troll. You can't go beyond 20, as stated in cgminer. You can, just need to do some modification.. |
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pontiacg5
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October 25, 2013, 01:01:45 AM |
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Managed to get 750Kh/s from a pair of Sapphire R9 280x rather easily, 1085/1500 so there might be more left. Mostly just for fun, not strictly for hashing  |
Please DO NOT send me private messages asking for help setting up GPU miners. I will not respond!!!
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B.T.Coin
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October 25, 2013, 11:12:30 PM |
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A fine is a tax you pay for something you did wrong.
A tax is a fine you pay for something you did right.
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Amph
Legendary
Offline
Activity: 3206
Merit: 1069
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November 29, 2013, 04:10:52 PM |
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An R9 280X has been added to the hardware comparison page. With OpenGL, it's either as good as the original 7970s or better. At this point, it seems to be way better than the 7970s. It looks like whatever they changed has fixed the original 7970 issues. https://litecoin.info/Mining_hardware_comparisonI get 750 kh/s with my Sapphire 7970s (w/ default firmware, 1080 engine, 1500 mem, I 13) They're getting 740 kh/s on the 280x at 1100/1500. Obviously the same chip...so I wouldn't expect much different I suppose...but still a bit disappointing. The driver is in beta still, so you can say it's a fail yet. HD 7970 is a mature product and the R9 280X is still in it infancy. The price is the same as any other HD 7970 and will eventually drop over time. The driver is not in beta, the driver released for review testing and BF4 is a beta. The R9 280x IS a 7970, they are XT2 boards and have nothing other than a flashed bios and a different cooler. To think you will see any increased performance over a 7970 is crap and there is nothing at all infant about the R9 280x. ALL 7970s (R9 280x) can push over 720Kh/s - The main difference between cards ignoring gpu/mem clocks is the configuration of 3 key miner settings: --gpu-threads --thread-concurrency --Intensity Some 7970's especially older ones do best on a single gpu thread with a high thread-concurrency and intensity. eg, "--gpu-threads 1 --thread-concurrency 24000 --intensity 19" A lot of newer boards (GHz editions) including the rebranded R9 280x do best with two gpu threads and a lower thread-concurrency and intensity eg, "--gpu-threads 2 --thread-concurrency 8192 --intensity 13" (have also found an odd thread concurrency such as 8191 give even better results) I have personally tested this on several 7970 boards and even 7950s are affected the same way. No BIOS flashing or modding has ever been needed just a correct miner configuration and the right gpu/mem clock ratio which I have found to be very different on some cards simply because of the type of ram used and the different timings some memory chips run at which is why some users get lucky with low mem frequencies and others simply do not. Bear in mind also that the R9 280 (non x variant) if and when its released will be a re-branded 7950 so could turn out to be a very good bang for buck card. Avoid the R9 270x as this is just a re-branded 7870, again the non x variant will be a rebrand of the 7850. Do enjoy your AMD re-branded kit while we wait to see if the real news here the R9 290x will be a mining king. i confirm this with my 7950, better have gpu to 2 and I to 13 |
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