Underperforming Sapphire Toxics R9 280x? :'(

[HemilTV]

Here are the specs: Intel Celeron g1820, 4GB integral RAM, evga supernova 1300 g2,

(3 x Sapphire Toxic R9 280x), Window 8 (I don't know how to upgrade to 8.1 )

 

I'm currently running this in cg miner: --gpu-platform 0 -d 0 -w 256 -v 1 -I 13 -w 256 -g 2 --shaders 2048 --thread-concurrency 8192 --gpu-engine 1070 --gpu-memclock 1500 --gpu-powertune 20 --gpu-vddc 1.100

 

The issue is that they are all underperforming :'(   on avg I'm producing a total of 1.7Mhs. (That's only approximately 580Khs for each card)

 

All the cards are running at reasonable temps of 60-68 Celsius

 

Please recommend further action that I should take as well as any settings that may work.

Thanks!

Edited April 1, 2014 by HemilTV

[DyGr00339]

It seems to be preforming around where they are supossed to..

 

 

EDIT: nvm, make sure it's not the OC

[Toxic Tom]

Thread concurrency looks a little low, you could try these values:

 

14336

20992

11200

24000

 

or you could just not specify thread concurrency and just let cgminer work it out from shaders

[HemilTV]

Isn't cg miner supposed to work with stock clocks if you don't put'em ?

also make sure there aren't running with crossfire enabled...

how do I know if crossfire is enabled?

[HemilTV]

Thread concurrency looks a little low, you could try these values:

 

14336

20992

11200

24000

 

or you could just not specify thread concurrency and just let cgminer work it out from shaders

but isn't the thread concurrency 8192. I thought that you can't change the value as it is unique to each gpu?

[HemilTV]

It seems to be preforming around where they are supossed to..

 

 

EDIT: nvm, make sure it's not the OC

I don't think so, according to the following link, r9 280x cards produce on average between 700-800Khs each https://litecoin.info/Mining_hardware_comparison

[Toxic Tom]

but isn't the thread concurrency 8192. I thought that you can't change the value as it is unique to each gpu?

 

Errm... that's not how it works

[Haf912]

Try
cgminer   --scrypt -o xxx -u yyy -p x --lookup-gap 2 --thread-concurrency 8192 -g 2 -I 13 --temp-cutoff 90 --temp-overheat 85 --temp-target 75 --gpu-memclock 1500 --gpu-engine 1080 --gpu-powertune -20 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale

[HemilTV]

Try

cgminer   --scrypt -o xxx -u yyy -p x --lookup-gap 2 --thread-concurrency 8192 -g 2 -I 13 --temp-cutoff 90 --temp-overheat 85 --temp-target 75 --gpu-memclock 1500 --gpu-engine 1080 --gpu-powertune -20 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale

I tried this , however each card is still only producing approximately 550Khs each :'(

[Toxic Tom]

Have you tried intensity at 18?

[HemilTV]

I have tried a series of different combinations. However none of them take me over 600KH/s. 

 

Thread concurrency looks a little low, you could try these values:

 

14336

20992

11200

24000

 

or you could just not specify thread concurrency and just let cgminer work it out from shaders

I have tried 24000 TC.

 

 

Check in catalyst (performance tab)

Under performance tab, all that I can control is the fan speed memclock gpu clock etc. But there is no option for crossfire?

 

I'm currently running window 8. Should I be running 8.1? I'm considering trying out win7. 

[TriBeard]

Integrated graphics/switchable graphics might be enabled somehow. Check in the 

 

I have tried a series of different combinations. However none of them take me over 600KH/s. 

 

I have tried 24000 TC.

 

 

Under performance tab, all that I can control is the fan speed memclock gpu clock etc. But there is no option for crossfire?

 

I'm currently running window 8. Should I be running 8.1? I'm considering trying out win7. 

 

 

Integrated graphics might be on or something. Check in the BIOS. I know at least on laptops if the integrated graphics are enabled, you get a version of catalyst that has a lot less options and such. 

[ThatCrappyGamer]

On my MSI R9 280x GAMING 3G in my rig I get 700 kh/s on Linux with Catalyst 12.8, intensity 20, worksize 256, lookup gap 2, thread concurrency 40960, shaders 0, gpu engine 1020 and powertune -20. I hope this helped. Good luck!

[Toxic Tom]

Have you tried intensity at 18?

 

Srsly, try it

[HemilTV]

Srsly, try it

On my MSI R9 280x GAMING 3G in my rig I get 700 kh/s on Linux with Catalyst 12.8, intensity 20, worksize 256, lookup gap 2, thread concurrency 40960, shaders 0, gpu engine 1020 and powertune -20. I hope this helped. Good luck!

Will definitely be thrying these

[EHill]

This thread is full of so much face palm.........start with stock clocks, increase TC by multiples of the shader count till Cgminer wont run, then increase core and memclock till k/hs start going down. Then fine tune TC to reach max overclock. Then start thinking about undervolting compared to core clock and k/hs= little profit at todays diff.  

 

Edit, 280X's will always use 2 threads and intensity 13.