Sapphire R9-280X Toxic
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I use the same settings as for my 7970 gigabyte and I get a 750kh :
cgminer.exe --scrypt --worksize 256 -v 1 -g 2 -I 13,13,13,13 --gpu-engine 1075 --gpu-memclock 1500 --shaders 2048 --thread-concurrency 8192 --lookup-gap 2 --gpu-fan 100 --no-submit-stale
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[quote name=“moafred” post=“44994” timestamp=“1387197240”]
I use the same settings as for my 7970 gigabyte and I get a 750kh :cgminer.exe --scrypt --worksize 256 -v 1 -g 2 -I 13,13,13,13 --gpu-engine 1075 --gpu-memclock 1500 --shaders 2048 --thread-concurrency 8192 --lookup-gap 2 [b]–gpu-fan 100[/b] --no-submit-stale
[/quote]use auto
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My rigs are in a basement. I don’t care about noise, but I want to reduce temp as low as possible to minimize the wear out.
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Nice, I have one of these cards on order! Should be here in a day or two. It’s packed, but not yet shipped out.
I have two 7950’s going at 1.3Mh/s so with this new card I’m hoping to get a nice round 2Mh/s :)
Only issue will be, getting the new card to play nice with my old car, as I hear the thread count is 2 on the 280 and 1 on my 7950’s, hopefully get this working in BAMT well.
Also… my 750W PSU might not be able to handle it… wishing I got the 850W+… maybe with some under volting I can get by…
Cheers for sharing your settings mate! +1
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Sorry for the delay guys, had some real work on, and then been having massive problems keeping it stable running 2 of these cards. I should deb back home later tonight to have a little more of a play and get you some answers.
[quote name=“moafred” post=“44994” timestamp=“1387197240”]
I use the same settings as for my 7970 gigabyte and I get a 750kh :cgminer.exe --scrypt --worksize 256 -v 1 -g 2 -I 13,13,13,13 --gpu-engine 1075 --gpu-memclock 1500 --shaders 2048 --thread-concurrency 8192 --lookup-gap 2 --gpu-fan 100 --no-submit-stale
[/quote]You sure your running g=2, every time I upped this from 1 to 2 my rig would crash and reboot.
[quote author=mattmct link=topic=5943.msg45276#msg45276 date=1387244731]
Also… my 750W PSU might not be able to handle it… wishing I got the 850W+… maybe with some under volting I can get by…[/quote]The simple answer to this is it won’t!! I’m doing the usual testing from my other thread, (still haven’t worked out the best way to present the answers) and a single 7970 & R9-280x Toxic at full tilt pull more than 750, and the 2 x R9-280x Toxic at 700Kh/s pull about 830W from what I can remember. so I was currently running mine at I=13 to get the hash rate to 500Kh/s and keep the power under 700W whilst new PSU comes in.
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Yes i’m sure.
I have double checked, because I have several rigs : one with 7970s and one with 280x toxic.
I run the same command line on both.
Yes I use -g 2 with success.For information, I use cgminer 3.3.1 and the latest catalyst drivers.
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[quote name=“uncle_muddy” post=“45404” timestamp=“1387279840”]
Sorry for the delay guys, had some real work on, and then been having massive problems keeping it stable running 2 of these cards. I should deb back home later tonight to have a little more of a play and get you some answers.[quote author=moafred link=topic=5943.msg44994#msg44994 date=1387197240]
I use the same settings as for my 7970 gigabyte and I get a 750kh :cgminer.exe --scrypt --worksize 256 -v 1 -g 2 -I 13,13,13,13 --gpu-engine 1075 --gpu-memclock 1500 --shaders 2048 --thread-concurrency 8192 --lookup-gap 2 --gpu-fan 100 --no-submit-stale
[/quote]You sure your running g=2, every time I upped this from 1 to 2 my rig would crash and reboot.
[quote author=mattmct link=topic=5943.msg45276#msg45276 date=1387244731]
Also… my 750W PSU might not be able to handle it… wishing I got the 850W+… maybe with some under volting I can get by…[/quote]The simple answer to this is it won’t!! I’m doing the usual testing from my other thread, (still haven’t worked out the best way to present the answers) and a single 7970 & R9-280x Toxic at full tilt pull more than 750, and the 2 x R9-280x Toxic at 700Kh/s pull about 830W from what I can remember. so I was currently running mine at I=13 to get the hash rate to 500Kh/s and keep the power under 700W whilst new PSU comes in.
[/quote]I just got my 280x toxic up and running in my rig (bamt) with my 2x 7950’s. Hopefully it last more than a few hours!
Still on my 750W so not pushing it yet. I can’t see to get it much above 550kh/s with anything I do. Running on the same settings as my two 7950’s right now.
Tried some of the recommended settings for the 280x without much luck. Is r = vectors? As my config has words rather than letters.
My mem clocks are down to 1150 as I didn’t notice any speed drop when i was configuring my 7950’s over the past few weeks. This is no doubt saving some power, and hopefully stable on my 750W for now.
edit: ahh: “gpu-threads” : “2”, …
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[quote name=“uncle_muddy” post=“45404” timestamp=“1387279840”]
[quote author=mattmct link=topic=5943.msg45276#msg45276 date=1387244731]
Also… my 750W PSU might not be able to handle it… wishing I got the 850W+… maybe with some under volting I can get by…[/quote]The simple answer to this is it won’t!! I’m doing the usual testing from my other thread, (still haven’t worked out the best way to present the answers) and a single 7970 & R9-280x Toxic at full tilt pull more than 750, and the 2 x R9-280x Toxic at 700Kh/s pull about 830W from what I can remember. so I was currently running mine at I=13 to get the hash rate to 500Kh/s and keep the power under 700W whilst new PSU comes in.
[/quote]That’s insane, my 7970 and R9 290 pull barely 600watts from the wall hashing at 1.6mh/s, are you running at stock voltage?
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If you underclock/volt them correctly you can get down to about 180 watts per 7970/r9 280x…i can actually get 4x 7970/r9 280x on a 850 watt PSU…just don’t push the cards you you will blow it up as these can draw upwards of 300 watts.
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I need to do a bit more research on under-volting, as I don’t understand how it works, or how to achieve it.
I know there’s
[code]“gpu-powertune” : “n,n”[/code]
In the cgminer.conf file, but I’m yet to learn what parameters to put in for “n” I’ve tried a couple of things and they seamed to make no difference, maybe the Toxic’s are locked? any help gratefully received.
UM
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[quote name=“RIPPEDDRAGON” post=“47095” timestamp=“1387812620”]
If you underclock/volt them correctly you can get down to about 180 watts per 7970/r9 280x…i can actually get 4x 7970/r9 280x on a 850 watt PSU…just don’t push the cards you you will blow it up as these can draw upwards of 300 watts.
[/quote]My 2x 7950 and 1 x R280 survived the night on my 750W (not optimal settings) Will tune some more when I get the chance.
Wow the R280 pumps out a lot of heat!
Yeah I think keeping the mem clock down a lit, and lowering the voltage will reduce the power consumption. I’m running BAMT off a USB stick, so no wasted juice there.
Unfortunately to run the trixx software to change my voltage is windows only. I found linux [url=http://sourceforge.net/projects/amdovdrvctrl/]http://sourceforge.net/projects/amdovdrvctrl/[/url] which might work.