Need help setting up mining with an AMD Radeon HD 7640G GPU
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Hey guys. I kinda need a little help setting up mining Feathercoins with CGMiner 3.1.0. The GPU is an AMD Radeon HD 7640G. CGMiner is working with the GPU, however, I’m only getting a hashrate for around 43 kh/s. A GPU should be performing much faster than that I’d assume. In case it is needed, here are the specs to my machine: [url=http://www.shopping.hp.com/en_US/home-office/-/products/Laptops/HP-ENVY/C2M11UA]http://www.shopping.hp.com/en_US/home-office/-/products/Laptops/HP-ENVY/C2M11UA[/url]
I’m not sure if the fact that it’s an APU has anything to do with it. I’m assuming my problem is that CGMiner may be incorrectly set up for my GPU and doesn’t have the optimal settings. Any help would be appreciated! -
Use cudaminer: [url=https://bitcointalk.org/index.php?topic=167229.0]https://bitcointalk.org/index.php?topic=167229.0[/url]
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It’s an AMD video card. Cudaminer is only for supported nVidia cards.
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[quote name=“Sneas” post=“1351” timestamp=“1367953532”]
It’s an AMD video card. Cudaminer is only for supported nVidia cards.
[/quote]I completely misread your entire post :)
what commands/paramaters are you running CGMiner with?
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Right now I’m running it via command line with these parameters:
cgminer.exe --scrypt -o http://pool.d2.cc:9344 -u myusername -p mypassword -I 13
Here’s the config file as well if it’s needed. I’ve tried various combinations with the parameters in this file as well but I can’t seem to increase my hashrate at all.:
{
“pools” : [
{
“url” : “http://pool.d2.cc:9344”,
“user” : “myusername”,
“pass” : “mypassword”
}
]
,
“intensity” : “13”,
“vectors” : “1”,
“worksize” : “128”,
“kernel” : “scrypt”,
“lookup-gap” : “0”,
“thread-concurrency” : “0”,
“shaders” : “256”,
“gpu-engine” : “0-600”,
“gpu-fan” : “0-85”,
“gpu-memclock” : “0”,
“gpu-memdiff” : “0”,
“gpu-powertune” : “0”,
“gpu-vddc” : “0.000”,
“temp-cutoff” : “95”,
“temp-overheat” : “85”,
“temp-target” : “75”,
“api-port” : “4028”,
“expiry” : “120”,
“gpu-dyninterval” : “7”,
“gpu-platform” : “0”,
“gpu-threads” : “1”,
“hotplug” : “5”,
“log” : “5”,
“no-pool-disable” : true,
“queue” : “1”,
“scan-time” : “60”,
“scrypt” : true,
“temp-hysteresis” : “3”,
“shares” : “0”,
“kernel-path” : “/usr/local/bin”
} -
You can try increasing intensity, but on a built-in laptop graphics card with those specs, that is about what I would expect.
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You can run intensity to 20 if you like, but then you can;t use the machine anymore at the same time. I keep mine at 12 while using it, then then at 18 while not using it. You can change it in cgminer while it’s running by hitting G then I and enter the number of intensity, then enter. Ramp up, just go one up, let it run for ten minutes and see if the rate went up. Do that until it goes down again. At 20 mine is worse than at 18.
Another thing, check the shaders number. See if you can find the exact numbers of shaders for your card and change that if its not that number. Seems a bit low. My card is ancient and has more.
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The Radeon HD 7640G has 256 Shader Processing Units
The general hashrate formula from litecoin was “shaders * 0.313” to get an estimated hashrate.
I believe that the formula also holds for FeathercoinIn your case it should be around 256*0.313 = 80khash
Remember notebook mining is not good for all your hardware since the cooling is not optimal