Open air case and a big boxfan is needed for good temps. Something like this: http://www.stomped.me/pics/100_0253.JPG
That screenshot was taken just a few seconds after launching cgminer, values will get more accurate over time and those rejects came only in the very beginning.
Topic: 2x 7970 Few questions - page 2. (Read 4246 times)
You guys that are getting the KH/s rates need to make sure you have the SDK installed!
unless you're mining LTC, then 750 khash is what a 7970 will get
You guys that are getting the KH/s rates need to make sure you have the SDK installed!
1050/1450, +20%
U: should be higher I'm having similar issues. Can get high KH/s but the numbers on the site are crap. The single card 7850 system is better than the dual 7870!
I can get ~735-750mhs LTC with that gigabyte with the switches below (stock locked voltage). LTC mining uses ~50w more per gpu than BTC mining. The real edge is the memory to engine clock ratio. Check cgminer's scrypt readme for good help finding the sweat spot.
--shaders 2048 --lookup-gap 2 --thread-concurrency 8192 -I 13 -g 2 -w 256 --gpu-engine 1100 --gpu-memclock 1500 --auto-fan
--shaders 2048 --lookup-gap 2 --thread-concurrency 8192 -I 13 -g 2 -w 256 --gpu-engine 1100 --gpu-memclock 1500 --auto-fan
i have 4 x gigabyte 7970's OC edition and was geting 700 stock. Just tried your settings and 3 of the cards got an additional 50 khash woot - hope it's stable cheers
Did I get this correctly, when setting up 4 7970, not to use crossfire, just to plug them in, right?
Why is this?
Why is this?
I can get ~735-750mhs LTC with that gigabyte with the switches below (stock locked voltage). LTC mining uses ~50w more per gpu than BTC mining. The real edge is the memory to engine clock ratio. Check cgminer's scrypt readme for good help finding the sweat spot.
--shaders 2048 --lookup-gap 2 --thread-concurrency 8192 -I 13 -g 2 -w 256 --gpu-engine 1100 --gpu-memclock 1500 --auto-fan
--shaders 2048 --lookup-gap 2 --thread-concurrency 8192 -I 13 -g 2 -w 256 --gpu-engine 1100 --gpu-memclock 1500 --auto-fan
2*7970 from Gigabyte (no GHz edition):
You should find a sweet spot between core and ram, it gets you around 730khs with stock volts on Gigabyte WF3 OC 7970 cards.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125439X2 --^
Is what i have. What would you suggest? Someone tweaked mine via TV and got me to 700 KH/S
Lol j/k I really love the cards. I get 722MH/s at 1200/1050 when mining BTC. Fan @ 90%, and temps <70C.
As mine are both apparently unlocked as well? I'm able to tweak voltage without an issue.
odd ...
You should find a sweet spot between core and ram, it gets you around 730khs with stock volts on Gigabyte WF3 OC 7970 cards.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125439X2 --^
Is what i have. What would you suggest? Someone tweaked mine via TV and got me to 700 KH/S
Lol j/k I really love the cards. I get 722MH/s at 1200/1050 when mining BTC. Fan @ 90%, and temps <70C.
This is what I have: http://www.newegg.com/Product/Product.aspx?Item=N82E16814125413
Nearly the same as that GHz edition but stock at 1000/1375. Haven't tried any other models but these seem to work well for me. Seems like one card in one of my rigs can't achieve 730Khs with unpowered 1x extender, while others do steady 730Khs. I'll try powered riser on that some day, already swapped the card to see if it's faulty but no difference.
1050/1450, +20%
Nearly the same as that GHz edition but stock at 1000/1375. Haven't tried any other models but these seem to work well for me. Seems like one card in one of my rigs can't achieve 730Khs with unpowered 1x extender, while others do steady 730Khs. I'll try powered riser on that some day, already swapped the card to see if it's faulty but no difference.
1050/1450, +20%
You should find a sweet spot between core and ram, it gets you around 730khs with stock volts on Gigabyte WF3 OC 7970 cards.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125439
X2 --^
Is what i have. What would you suggest? Someone tweaked mine via TV and got me to 700 KH/S
Lol j/k I really love the cards. I get 722MH/s at 1200/1050 when mining BTC. Fan @ 90%, and temps <70C.
Ah you have the same cards?
You should find a sweet spot between core and ram, it gets you around 730khs with stock volts on Gigabyte WF3 OC 7970 cards.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125439
X2 --^
Is what i have. What would you suggest? Someone tweaked mine via TV and got me to 700 KH/S
Lol j/k I really love the cards. I get 722MH/s at 1200/1050 when mining BTC. Fan @ 90%, and temps <70C.
700 KH/s is pretty good for a 7970, depending on how much you have it overclocked. I haven't been able to get mine past 650 personally, despite spending a lot of time tweaking settings.
As far as crossfire goes, everyone says to stay away from it, yes. I personally have had it on with CGminer doing SHA256 and scrypt and haven't noticed much difference either way. I leave it off though because there's not really anything I need to crossfire 7970s for that one 7970 can't do by its' self.
As far as crossfire goes, everyone says to stay away from it, yes. I personally have had it on with CGminer doing SHA256 and scrypt and haven't noticed much difference either way. I leave it off though because there's not really anything I need to crossfire 7970s for that one 7970 can't do by its' self.
Lol yeah thats what i figured as well. My rig is gonna be mining; nothing special and when i play games (BF3, C3, WoW, CSGO) I'm pretty sure 1 7970 can handle all of those maxed @ 1080p lol.
700 KH/s is good for a 7970? Awesome lol, didn't think it was that good.
What about MH/s (BTC)? What do you get? I get roughly 750 @ 1200/1600 Core/Clock
It should be around the same number except in MH/s.
https://github.com/litecoin-project/litecoin/wiki/Mining-hardware-comparison#wiki-ATI_AMD_GPUs
non of those settings that people suggest get those numbers lol.
700 KH/s is pretty good for a 7970, depending on how much you have it overclocked. I haven't been able to get mine past 650 personally, despite spending a lot of time tweaking settings.
As far as crossfire goes, everyone says to stay away from it, yes. I personally have had it on with CGminer doing SHA256 and scrypt and haven't noticed much difference either way. I leave it off though because there's not really anything I need to crossfire 7970s for that one 7970 can't do by its' self.
As far as crossfire goes, everyone says to stay away from it, yes. I personally have had it on with CGminer doing SHA256 and scrypt and haven't noticed much difference either way. I leave it off though because there's not really anything I need to crossfire 7970s for that one 7970 can't do by its' self.
Lol yeah thats what i figured as well. My rig is gonna be mining; nothing special and when i play games (BF3, C3, WoW, CSGO) I'm pretty sure 1 7970 can handle all of those maxed @ 1080p lol.
700 KH/s is good for a 7970? Awesome lol, didn't think it was that good.
What about MH/s (BTC)? What do you get? I get roughly 750 @ 1200/1600 Core/Clock
It should be around the same number except in MH/s.
You should find a sweet spot between core and ram, it gets you around 730khs with stock volts on Gigabyte WF3 OC 7970 cards.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814125439
X2 --^
Is what i have. What would you suggest? Someone tweaked mine via TV and got me to 700 KH/S
You should find a sweet spot between core and ram, it gets you around 730khs with stock volts on Gigabyte WF3 OC 7970 cards.
700 KH/s is pretty good for a 7970, depending on how much you have it overclocked. I haven't been able to get mine past 650 personally, despite spending a lot of time tweaking settings.
As far as crossfire goes, everyone says to stay away from it, yes. I personally have had it on with CGminer doing SHA256 and scrypt and haven't noticed much difference either way. I leave it off though because there's not really anything I need to crossfire 7970s for that one 7970 can't do by its' self.
As far as crossfire goes, everyone says to stay away from it, yes. I personally have had it on with CGminer doing SHA256 and scrypt and haven't noticed much difference either way. I leave it off though because there's not really anything I need to crossfire 7970s for that one 7970 can't do by its' self.
Lol yeah thats what i figured as well. My rig is gonna be mining; nothing special and when i play games (BF3, C3, WoW, CSGO) I'm pretty sure 1 7970 can handle all of those maxed @ 1080p lol.
700 KH/s is good for a 7970? Awesome lol, didn't think it was that good.
What about MH/s (BTC)? What do you get? I get roughly 750 @ 1200/1600 Core/Clock
700 KH/s is pretty good for a 7970, depending on how much you have it overclocked. I haven't been able to get mine past 650 personally, despite spending a lot of time tweaking settings.
As far as crossfire goes, everyone says to stay away from it, yes. I personally have had it on with CGminer doing SHA256 and scrypt and haven't noticed much difference either way. I leave it off though because there's not really anything I need to crossfire 7970s for that one 7970 can't do by its' self.
As far as crossfire goes, everyone says to stay away from it, yes. I personally have had it on with CGminer doing SHA256 and scrypt and haven't noticed much difference either way. I leave it off though because there's not really anything I need to crossfire 7970s for that one 7970 can't do by its' self.
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