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Author Topic: Visiontek 6950 not hashing or locking up  (Read 2805 times)
samurai1200
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April 03, 2013, 05:46:48 AM
 #1

Bought a Visiontek HD 6950 1gb.

In bitcoin or litecoin mining, i can't get over 1 MH/s or 10kH/s (respectively) and the PC locks up the display for a few seconds every ~15 seconds. GPU-z reports 100% GPU load, but temps stay low (about idle temps). When I have other cards in the rig, sometimes I get the "driver has stopped responding" message. Does not matter on which slot I put the card, or whether or not I'm using a PCI-e riser cable.

CGminer (through GUIminer) stays quiet like everything is normal, reaper (also through GUIminer) states Error 52 or Error 6 "getting work" and updates me with 0kH/s every second (though I haven't used reaper before, so I may have something configured wrong).

I've been googling the bitcointalk forum for hours and can't find a solution (and really, only a few others with a similar issue). Does anyone out there know what the hell is going on with my card?!

Hodl for the longest tiem.

Use it or lose it: http://coinmap.org/
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samurai1200
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April 03, 2013, 05:53:57 AM
 #2

LOL This shit always happens to me. I guess I didn't try modifying every variable in my CGMiner thread.

I'm going to leave this thread open for the posterity, no need for anyone to reply though:

FOR THIS CARD, GPU threads MUST = 1 !!!

Also, in some configurations, the card would not start hashing. I had to hop around PCIe slots until it was happy. It also seems to like to be 'started' first (in mining). Go figure.

Lastly, if Windows tells you the drivers crashed and recovered, you must reboot the PC.

Hodl for the longest tiem.

Use it or lose it: http://coinmap.org/
gnarcoinguy
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April 05, 2013, 06:31:02 PM
 #3

I'm having the same issue with my visiontek 6950s under linux.  Just 90% HW errors with cgminer.  I've tried a dozen different drivers and 3 different SDKs with no luck.  You figure anything out?
samurai1200
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April 05, 2013, 06:44:55 PM
 #4

It's such a fickle thing. What I ended up doing (while just trying things out of desperation), was put it into a full pcie-x16 slot, boot windows, let it install drivers. Then pulled it out, booted windows again. Let everything boot and made sure my other 2 cards could hash. Then shutdown and installed the Visiontek into a 1x with riser. Let the drivers install, then reboot again. After that everything worked.

Anytime I re/boot the machine without a card in the 1x, I have to boot and reboot to get it to hash.
Oh and if ANY card has a monitor plugged into it, I get crashed drivers left and right (I VNC into the machine over my network).

Linux would be a mystery to me in this case. Driver install is such a manual process with linux that I think you'd just end up with a big headache. Drivers are the reason I gave up on the linux environment in all of my PCs =(

Hodl for the longest tiem.

Use it or lose it: http://coinmap.org/
samurai1200
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April 10, 2013, 04:16:50 AM
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Yeah nothing but hardware errors. I'm lost.

Hodl for the longest tiem.

Use it or lose it: http://coinmap.org/
gnarcoinguy
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April 11, 2013, 02:52:34 PM
 #6

Try reaper, I had better luck with it.  Also if on cgminer try this, it sorta owrked for me, not a great hash rate but no errors:
cgminer --thread-concurrency 7168 -w 256 -g 1 -I 14
gnarcoinguy
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April 23, 2013, 10:13:15 PM
 #7

I had nothing but problems as well, when the cards started dying one after another I realized it wasn't cgminer, or linux, or the drivers, it was the cards themselves.  They are absolute garbage and broken from the get go.  If its not too late try and get your money back from wherever you bought them---I doubt an RMA is a good idea they will just send you more crap.

See this thread for more details https://bitcointalk.org/index.php?topic=185779.0
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