R9 280x VRM temperature

[miztaziggy]

I have 2 R9 280x I bought a while ago. They are running in xfire and mining at 740 with these settings:

--gpu-engine 1070 --gpu-memclock 1500 --gpu-powertune -30  -I 13 -g 2 -w 256 --thread-concurrency 8192

They run in a Coolermaster case. Both sit about 70 deg.

VRM temp shown in GPUZ is about 80 degrees.



Now I have bought another 5 and put them in an open air rig.

I run them with the same settings.

These cards start to mine at 730KH but quickly they drop down to the mid 600s.

GPUZ shows activity at 64% and VRM temperatures over 100 deg. About 109 degrees maximum.

So what's changed? Have Sapphire released an inferior card and badged it up the same?

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[hyphenated]

Try one or more box fans behind the rig first - you need airflow above & beyond the GPU fans.

Then try one card at a time, then two, and so on. There will be airflow interactions, so watch what happens to all the board temps.

If you find a 'hot' card at stock speeds consider RMA - it could have poorly applied TIM, but RMA is for before the board turns black and bursts into flame  


BTW - crossfire is usually a no-no.

[bl8cz]

Also try to lower voltage using Sapphire Trixx SW. Try 1089mV for 1070 engine.

I explained it here

https://bitcointalk.org/index.php?topic=381079.msg5003144#msg5003144