Hi, I need some help.
*edit*: I'm realizing I'm posting this here but I'm actually mining LTCs not BTCs, well my brain is gone lol. If you can help me anyway I'd appreciate
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Win 7 64-bit / cgminer 3.7.2 / HD5870 (CPU 875Mhz, MEM 1250Mhz)
I've been using AMD drivers 13.9 with the bundled OpenCL for some days but I'm not satisfied with the performances, around 360Mh/s but with -I 15 and temperature of 88-89.5 C, very HIGH if compared with the ones I've read in other threads in this forum of around 60-70 C ( how do you do that guys btw?!
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So I decided to change the drivers/opencl configuration according to what it's best that it's told to be AMD 11.12 and OpenCL 2.1It wasn't easy to download them but I finally found them:
11-12_vista64_win7_64_dd_ccc_enu.exe
ATIStreamSDK_dev.msi (opencl 2.1)
So I rebooted in safe mode to remove current display drivers and used an utility found on guru3d, DDU: DDU v9.8.4.exe It worked nice resolution went to 800x600. Did a search for opencl.dll in c:\ and no results were found.
Installed 11.12, rebooted
Installed ATIStreamSDK_dev.msi and according to this, it seems it got installed as platform 2. My gpu cypress is listed as #2 device while the #1 is my cpu i5 750:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fdec.imghost.us%2FpojZ.png&t=665&c=Ye2_eVbEgbTdWA)
Deleted a .bin file in cgminer folder because I read it is compiled according old version of OpenCL so it cgminer would crash.
Now, my cgminer bat file was:
color 02
setx GPU_MAX_ALLOC_PERCENT 100
D:\cgminer-3.7.2-windows\cgminer.exe --scrypt -o stratum+tcp://lite.coin-pool.com:3333 -u user -p pass -I 15 --thread-concurrency=8000
If I run the same way, I get exactly same Mh/s 360 and 88 C as temperature as before
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So I suppose I have to switch to platform 2 and according to cgminer's help it's done with --gpu-platform. Here I don't know if platforms starts from 0 but if the default is -1 I suppose starts from 1, so I tried adding this to cgminer command line:
color 02
setx GPU_MAX_ALLOC_PERCENT 100
D:\cgminer-3.7.2-windows\cgminer.exe --scrypt -o stratum+tcp://lite.coin-pool.com:3333 -u user -p pass -I 15 --thread-concurrency=8000 --gpu-platform 2
If I run this, I get this:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fdec.imghost.us%2Fpojz.png&t=665&c=7p4AtqWDhMs8OA)
"clDevicesNum returned error, no GPUs usable"
Any idea how to fix this?
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