Optimizing sapphire R9 280x Vapor-x

[MisO69]

I have some new info, well old for me. I should have posted here earlier.

I got a few more of these cards and found that they had different memory manufacturers, thus needing different params to run. The 8192 tc and 2 threads seems to be the correct setting but the VRMs were running at 110 degrees! hot as hell. You guys need to load GPU-Z and check the VRM temps of your cards. If you haven't flashed them with optimized bioses from the litecoin forums you may be burning up your cards.

After identifying the memory as Elpida I found modded bioses by a user named Stilt. You can find them here : https://litecointalk.org/index.php?topic=12369.msg93754#msg93754

That thread has all the information you need to know to correct this problem. With the modded bios my VRMS (voltage regulators) are running at 60 degrees. The memory settings are also tweaked nicely for 1500/1044 allowing for undervolting 1.088 or less. The cards run quiet, cool, efficient and produce 725Kh/s with these settings.

--lookup-gap 2 --thread-concurrency 11280 -g 2 -I 13 -w 256 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale

Memory 1500
Core 1044
VDDC 1.088

[Bfljosh]

 +
disable ulps settings.

(this is the r9 280 sapphire toxic card)

[spizzlo]

Overclocking didn't make any change at all. topping around 570 kh atm.

I have some Saphire R9 280x Vapour-x cards using these CGMiner settings, they give me 740Kh per card and run at 70 degrees.

cgminer --scrypt -o http://wdc.coinmine.pl:9090 -u username.1 -p x --lookup-gap 2 --thread-concurrency 11200 -g 2 -I 13 -w 256 --auto-fan --gpu-fan 30-75 --temp-cutoff 90 --temp-overheat 85 --temp-target 72 --gpu-memclock 1500 --gpu-engine 1080 --gpu-powertune -20 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale

You're a superhero man these settings are awesome! I'm getting 720Kh consistently. For some reason though auto-fan is messed up for me. It actually goes down as the temp goes up. All good though since Sapphire Trixx maintains fan speed just fine. Mine is the 7970 Vapor-X which is the same card. I've had it for a while but I just started mining. Only 1 card though but it's still fun. Thanks again!