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ATI 4870 Crashes Can't Mine Anything With CGMiner

Tags:
  • Fan
  • mining
  • Graphics Cards
  • Graphics
  • Bitcoins
  • ATI
  • dogecoin
Last response: in Graphics & Displays
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March 11, 2014 2:56:49 AM

So I upgraded from a POS card with like the smallest fan on it lol was only getting 32kh/s with DogeCoin hey still better than nothing

I got this 4870 Sapphire Radeon ATI video card and no matter what program I run (CGMiner, GUIMiner, etc) It crashes before mining.

While the POS video card still mines 32kh/s if I put it back in. I tried downloading a new version of cgminer and that didn't work.

According to https://litecoin.info/Mining_Hardware_Comparison the 4870's should get around 120 - 140kh/s which isn't bad for being so cheap, so it'd be great if I can get this to mine!

I hope someone here at Toms can help me out this has been giving me a headache for a couple long nights. Thanks guys!

More about : ati 4870 crashes mine cgminer

March 11, 2014 3:56:30 AM

--shaders 800 --thread-concurrency 3200 --intensity=11 -g 1 --lookup-gap 4

add to cgminer bat file. Mostly you need the -g 1 and lookup-gap 4
-Make sure you are using cgminer 3.7.2 or older. The newest one wont work for script.

With the current diff changes, the power cost will be more than you make with a hd-4870.

The hd-4870 is still a ok gaming card.
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March 11, 2014 3:44:49 PM

I don't have a bat file so I just did that when I started cgminer and it still crashes immediately.

cgminer --scrypt -o stratum+tcp://stratum-us.doge.hashfaster.com:3339 -u myusername.myworkername -p mypassword--shaders 800 --thread-concurrency 3200 --intensity=11 -g 1 --lookup-gap 4

It is CGMiner 3.7.2 that I am using.

So I googled and found out how to create a .bat file I did that and it still crashes.

I've tried everything including using DriverCleaner to completely uninstall the previous drivers and then install the latest new one's.
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March 11, 2014 5:16:38 PM

I also heard that there is a new bios update for the Sapphire 4870's but I can't find it
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Best solution

March 12, 2014 2:20:49 PM

Double click on the bat file not cgminer to start the miner.

--shaders, threads and intensity is not really needed, the miner will use basic settings without them.

The basic idea behind the bat file is so you can make as many of them as you wish, each with different settings. So as long as you give the new one a new name like miner1.bat and later miner2.bat ect.

Download and install caps viewer so you can see what the card is doing first. If opengl and opencl are not working, the miner will never work.
http://www.geeks3d.com/20140312/gpu-caps-viewer-1-20-1-...

http://www.coinwarz.com/miningprofitability/litecoin

Mining makes basically nothing.
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March 12, 2014 3:11:15 PM

I agree that coin mining is mostly useless.
But regardless:

If the card is overcocked then set it back to stock
Try
cgminer --scrypt -o stratum+tcp://stratum-us.doge.hashfaster.com:3339 -u myusername.myworkername -p mypassword -i 11
All the other options are not neccasary
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