R9 290, sharing my knowledge
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Ok so i just found out that these cards are really sensitive to voltage. And i mean that they need a lower voltage in order to reach a higher hashrate. With the voltage on defualt i got 800kh/s with the settings below. With the voltage on -69 i got 850kh/s. With -59 i got 860 kh/s and i’m still tweaking now. And i’m talking about an avarage over several days and the same pool and settings. Anyone else experiencing the same with their 290? How high did you get your hashrate?
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I am running 2 rigs with dual R9 290
I am getting
Khash 877 - 880 / 1650 WU stable on both rigs using this guide [url=http://www.holynerdvana.com/2013/11/litecoin-mining-with-r9-290-and-r9-290x.html.]http://www.holynerdvana.com/2013/11/litecoin-mining-with-r9-290-and-r9-290x.html.[/url]
This is on default power settings.
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Except from guide run GPU Engine at 1000 at try to keep temp at 65
then i get 895 with WU of 885. With temp at 80 WU drops to 835.
But difficult to keep both cards at same temp at one is bound to blow hot air to another.
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Running several R9 290 Sapphire here.
The first ones running on stock settings on 830kH/s
The later ones (purchased later)running stock on 840kH/s.I havent looked into it but the speed rise between the earlier and later cards could be caused by the new R9 290 bios released end november.
Running cgminer with: “-I 20 -w 512 --thread-concurrency 32765 --lookup-gap 2
–auto-fan --temp-target 75 --api-listen --api-network --gpu-memclock 1250 --gpu-engine 947 --gpu-powertune 10”It seems the earlier R9 290 cards from Sapphire could be re-flasehd to 290x version :-)
Havent tried that though but wil soon and post experiences here. -
No sapphire’s have been sucessfully flashed afaik. Mine can’t at least, it has hynix chips
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Got a new set of Sapphire R9 290 today and they are much faster than the ‘old’ ones.
I’m now getting 891kH/s with these settings:-I 20 -g 1 -w 512 --lookup-gap 2 --thread-concurrency 24550 --auto-fan --temp-target 75 --api-listen --api-network --gpu-engine 1000 --gpu-powertune 20 --gpu-memclock 1500
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Hmm getting the same rate only with 975 core clock and 1250 mem clock with the same settings only -g 2