R9 280x Gigabyte GV-R928XOC-3GD
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What did you get out them when undervolting to 1.075V ?
What temps/fan speed ? -
just my 2 cents:
maybe you want to set a clock-range, target-temp, overheat-temp and cutoff-temp? - espeacilly you run it unattended.
- Plopsi
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[quote name=“prensel” post=“45106” timestamp=“1387216163”]
What did you get out them when undervolting to 1.075V ?
What temps/fan speed ?
[/quote]
I haven’t been able to get the rig out to the garage (mid-40’s temps, more air flow) so I haven’t been able to really whip them yet.And oddly enough, the exact same rom flash to all three cards yielded 1.075 on one card, 1.100 on the other two. Close enough, I’ll take it.
[b]Most importantly they’re stable[/b] running in the mid-500’s at low 70’s at something like 50-60% fan speed. Once I get a dedicated fan on these I’ll try to get them up to the high 600’s, low 700’s.
- mike
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[quote name=“sweater” post=“46184” timestamp=“1387468024”]
[quote author=prensel link=topic=5326.msg45106#msg45106 date=1387216163]
What did you get out them when undervolting to 1.075V ?
What temps/fan speed ?
[/quote]
I haven’t been able to get the rig out to the garage (mid-40’s temps, more air flow) so I haven’t been able to really whip them yet.And oddly enough, the exact same rom flash to all three cards yielded 1.075 on one card, 1.100 on the other two. Close enough, I’ll take it.
[b]Most importantly they’re stable[/b] running in the mid-500’s at low 70’s at something like 50-60% fan speed. Once I get a dedicated fan on these I’ll try to get them up to the high 600’s, low 700’s.
- mike
[/quote]
Take a look at my power optimization thread: [url=http://forum.feathercoin.com/index.php/topic,4176.0.html]http://forum.feathercoin.com/index.php/topic,4176.0.html[/url]
I am working on a guide but that will help for now. I am so pissed my new Gigabyte R9 280xs are voltage locked…I am going to have to flash each of the 2 bios to different voltages, one for power optimization and the other for max hash rate. - mike
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[quote name=“angloblaxon” post=“39776” timestamp=“1386199808”]
paste your config? atm i have 3 + 1 7970 running in a rig. They are close together until those openrigs come in! [url=https://openrigs.com/]https://openrigs.com/[/url]i have one that sits at 80 degrees but its stable.
Here is a pic of my 2 top rigs.
[img]https://dl.dropboxusercontent.com/u/20540721/2013-12-04 17.24.20.jpg[/img]
[/quote]what’re those red wires?
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[quote name=“Max.Wyght” post=“46290” timestamp=“1387486776”]what’re those red wires?[/quote]
Power leads / connections for the video cards. Most higher-end GPUs need aux power in addition to anything running over the PCI-e connection.
- mike
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[quote name=“RIPPEDDRAGON” post=“46192” timestamp=“1387469172”]Take a look at my power optimization thread: [url=http://forum.feathercoin.com/index.php/topic,4176.0.html]http://forum.feathercoin.com/index.php/topic,4176.0.html[/url]
I am working on a guide but that will help for now. I am so pissed my new Gigabyte R9 280xs are voltage locked…I am going to have to flash each of the 2 bios to different voltages, one for power optimization and the other for max hash rate.
[/quote]
This is good info to keep on hand. As for unlocking the voltage, I was a bit turned off by it and worried that I’d bork the ROMs on these cards until I followed that process ([url=http://www.cryptobadger.com/2013/10/undervolting-in-linux-via-modified-bios/]http://www.cryptobadger.com/2013/10/undervolting-in-linux-via-modified-bios/[/url]) and found out how easily it’s done. And very, very effective.Finally moved the rig out to the garage to take advantage of the sub-freezing temps outside and only now begun tweaking settings. Running at a thread concurrency of 8192 and intensity of 13 I’m getting 675 at 70deg C without even trying hard. Seeing your guide I think I need to bump TC to 21000whatever or something, see if that works.
BUT I’M MUCH RECEIVING MANY DOGE AT THE MOMENT AND DON’T WANT TO TAKE THE DOWNTIME or whatever
- mike