Looking to sell or trade a few of my cards. Will accept BTC or Paypal payment. All Free Shipping to continental US.
For Sale:- 1x Sapphire 6990 - $675
- 1x HIS 6970 2gb - $275
- 1x XFX 6950 1gb - $190
2x 6770 1gb - $90 each (1 gigabyte 1 sapphire) SOLD OUT8x 1x XFX 5770 1gb - $75 each
If you are interested in trading, I'm looking for an AM3+ Gigabyte UD7 or Asus 990FX Video of 5970,6970, and 6950 in action http://youtu.be/fqqcdfEYN6QMore info on my open air minecart rig these are currently running in: https://bitcointalk.org/index.php?topic=42410.0[/list] |
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The max I dare to put in an rig is only 3 GPU which I find it very hot. How do you keep that thing cool within limits?
I think the box fan is helping a bit. All cards are memory underclocked as low as they go without a bios flash. New Specs: 1x 6950 3x 6970 1x 5970  I should be able to pull a bit more out of the 5970 but I'm going to let it burn in at stock core clock for a couple days. Here's the video I promised to post. http://youtu.be/fqqcdfEYN6Q |
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That does suck. Go to 900/775 and you should run a little cooler. I may try playing with my bios this weekend and will let you guys know how it goes. Unfortunately I've also read that booting into Windows is impossible if you lower the clocks on a 6990 too much... I may try just changing the high profile settings in the bios and see if I can still load Windows.
please let us know how it works out Well, bad news, Lowering the clocks on the performance setting in the bios causes windows blue screen at bootup. I tried the following settings on performance level 3 for master and slave in the bios: 960/330 900/625 Another bit of bad news, it appears the issue exists with 6970s as well. Anything over 125mhz below core and the mem clock is back to default. The temperature diff was a little more subtle but my 6970 was running at 79 degrees with 900/300 core to mem and 76 degrees at 900/775. "ATI Tray Tools" appears to be the only tool that can actually lower my 6970 past the 125mhz barrier. My 6970 runs at around 72 degrees celcius when clocked at 960/330 through ATITT. Unfortunately ATITT can not handle more than 2 GPUs and is a really shitty application |
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Haha, I'll upload some more pics tonight. Couple of rods going across the crate holding the cards up.
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That does suck. Go to 900/775 and you should run a little cooler. I may try playing with my bios this weekend and will let you guys know how it goes. Unfortunately I've also read that booting into Windows is impossible if you lower the clocks on a 6990 too much... I may try just changing the high profile settings in the bios and see if I can still load Windows.
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"The Mine Cart"I would like to share my first open air rig with you guys. Built inside of a storage crate, all cards are running cool at 2 gh/s total. 6970s clocked at 920/795 and 6950 at 820/700. All 100% fan speed with a little help from a rear box fan. Specs:
- Case: Storage crate!
- Motherboard: Gigabyte AM3+ UD3
- CPU: AMD Athlon II Dual core 2.8 ghz
- Memory: 2gb DDR3 memory
- PSU: 1200 Watt Corsair ATX
- OS: Linuxcoin running off of 4gb usb stick
- GPU: 4x 6970 (920/795 clocks) 1x 6950 (820/700 clocks)
I was hoping to get the lonely 6950 out left in but my power supply couldn't handle the draw. I may try playing around with the card bios this weekend to get past the 125mhz mem underclock limits of the 6900 series cards and bring my power usage down.  
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and the topic creator was never heard froma gain
I sent him a PM asking for references on the 2 he supposedly sold and got no response. I'm assuming this is a scam. |
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Awesome tool. Unfortunately, I cannot lower the mem clock more than 125mhz lower than the clock rate on 6990s(can't do it with any other applications either.)
what driver version do you use and what is the cards' manufacturer ? I am pretty sure other people did not have this problem. Sapphire 6990, using 11.8 drivers. I should clarify though, the tool will let me set any clock speed I want, and the memory clock will show at that rate when I run with -o switch. I did a quick test to prove that the clock rates being shown were inaccurate and I would like someone else with 6990s to confirm my results. Test 1 1 6990 core running at 830/1275, 100% fan, stock clocks, mining for 5 min Max temp 74c Test 2 1 6990 core running at 830/705, 100% fan, mining for 5 minutes Max temp 70c Test 3 1 6990 core running at 830/704(according to clocktweak), 100% fan, mining for 5 minutes Max temp 74c This is actually a pretty well known issue with 6990s and it appears to be a bios limitation. Any mem clock 126mhz or more below core will automatically set mem clock back to stock speed. I was hoping maybe you had figured a way around it. I have a HIS 6990 running at 900/300 working just fine, (watercooled) using 11.8 drivers Have you confirmed those speeds are accurate? I can set my clocks to 900/300 as well but my test proves the settings did not actually take. confirmed speed with clocktweak and GPUz. I know GPUz is a reliable app. I can confirm my settings as well... Problem is, the clock readings are inaccurate. Can you run my test or something similar? Try running at 900/1275, 900/800, and 900/300 and let us know your temps. I suspect your 900/300 temps will be no different than your 900/1275 temps. If it's the same across all 3 settings then water-cooling is masking the issue. I also challenge anyone who thinks they have significantly downclocked their memory on 6990s without a bios flash to run through my test. |
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Awesome tool. Unfortunately, I cannot lower the mem clock more than 125mhz lower than the clock rate on 6990s(can't do it with any other applications either.)
what driver version do you use and what is the cards' manufacturer ? I am pretty sure other people did not have this problem. Sapphire 6990, using 11.8 drivers. I should clarify though, the tool will let me set any clock speed I want, and the memory clock will show at that rate when I run with -o switch. I did a quick test to prove that the clock rates being shown were inaccurate and I would like someone else with 6990s to confirm my results. Test 1 1 6990 core running at 830/1275, 100% fan, stock clocks, mining for 5 min Max temp 74c Test 2 1 6990 core running at 830/705, 100% fan, mining for 5 minutes Max temp 70c Test 3 1 6990 core running at 830/704(according to clocktweak), 100% fan, mining for 5 minutes Max temp 74c This is actually a pretty well known issue with 6990s and it appears to be a bios limitation. Any mem clock 126mhz or more below core will automatically set mem clock back to stock speed. I was hoping maybe you had figured a way around it. I have a HIS 6990 running at 900/300 working just fine, (watercooled) using 11.8 drivers Have you confirmed those speeds are accurate? I can set my clocks to 900/300 as well but my test proves the settings did not actually take. |
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Awesome tool. Unfortunately, I cannot lower the mem clock more than 125mhz lower than the clock rate on 6990s(can't do it with any other applications either.)
what driver version do you use and what is the cards' manufacturer ? I am pretty sure other people did not have this problem. Sapphire 6990, using 11.8 drivers. I should clarify though, the tool will let me set any clock speed I want, and the memory clock will show at that rate when I run with -o switch. I did a quick test to prove that the clock rates being shown were inaccurate and I would like someone else with 6990s to confirm my results. Test 1 1 6990 core running at 830/1275, 100% fan, stock clocks, mining for 5 min Max temp 74c Test 2 1 6990 core running at 830/705, 100% fan, mining for 5 minutes Max temp 70c Test 3 1 6990 core running at 830/704(according to clocktweak), 100% fan, mining for 5 minutes Max temp 74c This is actually a pretty well known issue with 6990s and it appears to be a bios limitation. Any mem clock 126mhz or more below core will automatically set mem clock back to stock speed. I was hoping maybe you had figured a way around it. |
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+1 to Tyson95 for a great hardware trade. Quick shipment, honest trader.
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I'm in if you are willing to send the key first.
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Awesome tool. Unfortunately, I cannot lower the mem clock more than 125mhz lower than the clock rate on 6990s(can't do it with any other applications either.)
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+1 for toasty on 10 5770s. Great seller!
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Ordered 10 more 5770s from toasty, all came in this weekend in great condition and packed very well. Toasty is a highly recommended seller and I will definitely buy from him again. You may also notice that he is selling new 6990s for under list price. If you are in the market for those, might want to jump on that.
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Theres always the PCI to PCIe converters, I'm considering getting 3 to fully utilize my motherboard... Their a bit expensive, but its a lot cheaper than a new board, new ram, and a new CPU. Not sure about power draw, but I solder SMT chips every day, so cutting some power traces and adding a molex to a board isn't a big deal.
Do those work pretty well? Require any special drivers? How much do the converters usually go for? These will be for brand new mining rigs but if I can get a motherboard with 2 PCIe and 3 pci for 50 bucks, and converters aren't that expensive, might not be a bad idea. |
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