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One awesome thing with these cards and mining is that you can downclock the memory REALLY far without it affecting your mining performance.
I'm running 900 core 275 mem right now. Temps and power consumption (I assume) went down. It's running much cooler and quieter now, from 77 at full load to around 70, and the fan is much much quieter. I'd set the mem clock lower, but if I reach 250 then it actually starts being unstable - Aero goes nuts and starts artifacting everywhere.
I used ATI Tray Tools to downclock, Afterburner or CCC wouldn't let me go lower than 600mhz. Even though the slider in Ati Tray Tools only goes to like 595mhz, what you can do is slide it to that 595mhz, click Apply, and for some reason the next few mhz will be "unlocked". You can keep going down until you reach the speed you want.
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71mhash with downclocked memory and stream SDK 2.2.
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Well, I'm feeling pretty stupid. The screensaver NPC miner I've been using only jumps up to about 250 - 300 khash/s if I am only using one monitor, it plummets to 1 or 2 khash/s on dual Extended Desktop mode.  And absolutely nothing I do works with OpenCL, it crashes every time. I'm going to get rid of ATI Stream, it's totally worthless. And since my old Intel Centrino Pentium M 1.4ghz is pretty darn useless for pool mining, and I can't get anything at all to use the ATI Mobility Radeon 7500 GPU, I'm going to abandon mining all together. ...your GPU is reeeeeeeeeeeeeeeeeally old and doesn't support OpenCL. |
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My intent is more academic than practical. and the "look what I can do" factor. haha.
I am using the default sheevaplug distro of ubuntu.
What exactly is a pool? Is it just multiple machines mining for the same owners address?
Yes, and when a machine finds a block the 50BTC is distributed among the machines that submitted work. Overall the payout's the same, but in a pool you get payment over time instead of the 50BTC you'd get every time you find a block. |
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Perfect security is an illusion. Physical currency can be stolen, too... no vault is completely secure. Bitcoins even have a few advantages over physical currency, just as FatherMcGruder explained.
Exactly. This is as much a "security hole" as someone breaking into your house and stealing your jewelry. |
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The technique worked for me, thanks [Tycho]!
JWU42, try plugging in the DVI->VGA converter that came with the card. Maybe that'll make the card think it's a display?
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Hmm, I can't get it to work. Both cards show up in GPU Caps Viewer, both cards show up in HWMonitor, but poclbm only sees my 5870. The GUI version only shows my CPU and Cypress, which is the 5870. Any ideas?
Plug some display in the second card and reboot your PC. Ah, I think I remember this technique from the folding@home forums. Will try, thanks for the advice! |
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Hmm, I can't get it to work. Both cards show up in GPU Caps Viewer, both cards show up in HWMonitor, but poclbm only sees my 5870. The GUI version only shows my CPU and Cypress, which is the 5870. Any ideas?
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You can check your Stream SDK version using GPU Caps Viewer.
Anyway, it turns out my problem was that CCC still thought I was running a 4850, so it set the core clock to 625Mhz. I reinstalled CCC, downgraded to Stream 2.2, and now I'm running between 300-340mhash/s.
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haha, I literally installed my 5870 five minutes ago. What a coincidence. Mine is getting only 220mhash/s, I'm suspecting it's because I'm running Stream 2.3. Anyone know how to downgrade successfully?
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Try this SSE miner. I'm using a Core 2 Duo E8400 and my rate increased from ~2mhash to ~7mhash. |
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As other ppl said, you by just using another worker.
It's sad to see ppl don't understanding what's going on with bitcoins and how you will not get back even half of the cost of your card not considerating energy costs and the system up 24/7.
Well, I don't pay for electricity so I don't care about that. The system will (and already has been) always be up 24/7. According to this I'd get at least 50-75BTC before the next difficulty increase, and frankly, that will make me happy. The card isn't exclusively for bitcoin, I've been meaning to upgrade it for gaming as well. |
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Awesome, thanks for the quick reply!
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Okay, so I've recently discovered the joys of mining. I've invested $200 into an HD 5870. It'll be here tomorrow, but right now I still have my HD4850. My question is, would it be possible to stick the 5870 in there as the main GPU and then leave the 4850 in there to mine with as well? That way I'd use poclbm on both the 5870 and 4850. It'd be a shame for such a good card to go to waste in my closet.
Of course, I wouldn't use the crossfire bridge or anything like that.
Thanks!
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This topic should be marked [JOKE] and closed.
What is it useful for anyway ? Increasing post counts ?
If everything was for a purpose, things would be ridiculously drab. I found this pretty amusing. |
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I've noticed that aggressive overclocking leads to greater amounts of invalid/stale results.
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 Pop? Something's up on bitcoin central. |
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To me, it seems like your entire case could use a bit of an overhaul and some improved cooling.
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Any news on when registration will be open again? I have a friend that wants to get in on the action.
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