JorgePasada (OP)
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April 25, 2011, 07:49:21 PM |
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So I'm new here, but just wanted to say Hi!
My question is, are there any confirmed 4 card systems out there?
What motherboards are they using? Cards and Power Supplies?
I'm looking at a 4 card system and right now I think 5850's are the most economical because I'm pretty sure I can get 4 of them on one PSU. They're relatively energy efficient and the Cost/MHash is incredibly low.
Apologies if I'm not scouring the forums well enough before asking this. TONS of good information here.
Oh, and is there a thread on vladimir's setup anywhere?
Thanks!
Jorge
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rezin777
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April 25, 2011, 08:02:43 PM |
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5850s are not as efficient as 5870s. Less stream processors is my guess as to why. You can get four 5870s on one PSU, no problem.
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dust
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April 25, 2011, 08:14:25 PM |
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Keep in mind putting 4 cards on a motherboard results in the cards flush against each other. 5870s will throttle if not cooled sufficiently. You may want to consider building 2 dual card setups with cheaper PSUs and motherboards.
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NOTAL
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April 25, 2011, 08:17:35 PM |
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5850s are not as efficient as 5870s. Less stream processors is my guess as to why. You can get four 5870s on one PSU, no problem.
5850s are significantly cheaper to buy though. |
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JorgePasada (OP)
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April 25, 2011, 08:21:06 PM |
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The cooling issue and the Cost issue is why I was thinking the 5850's would be better.
The 5870 is not as readily available, and when it is the price is between 2 and 3 times higher than the 5850's.
Are there people who have built custom boxes to put 4 high end cards on one motherboard? 6990's or 5970's
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Littleshop
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April 25, 2011, 08:23:07 PM |
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5850s are not as efficient as 5870s. Less stream processors is my guess as to why. You can get four 5870s on one PSU, no problem.
5850s are significantly cheaper to buy though. You would save money on the MB if you went with less 5870's. For me the 5870 is the sweet spot. I would love to have a 5970 but I never run into them cheap. |
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dust
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April 25, 2011, 08:23:34 PM |
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Are there people who have built custom boxes to put 4 high end cards on one motherboard? 6990's or 5970's
Yes: http://blog.zorinaq.com/?e=42 |
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OgiDogi
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April 25, 2011, 08:24:41 PM |
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So I'm new here, but just wanted to say Hi!
My question is, are there any confirmed 4 card systems out there?
What motherboards are they using? Cards and Power Supplies?
I'm looking at a 4 card system and right now I think 5850's are the most economical because I'm pretty sure I can get 4 of them on one PSU. They're relatively energy efficient and the Cost/MHash is incredibly low.
Apologies if I'm not scouring the forums well enough before asking this. TONS of good information here.
Oh, and is there a thread on vladimir's setup anywhere?
Thanks!
Jorge
You might be interested in some set-up like this one. P.S. dust seems to have it bookmarked while I was googling for "whitepixel"  |
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JorgePasada (OP)
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April 25, 2011, 08:30:35 PM |
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5850s are not as efficient as 5870s. Less stream processors is my guess as to why. You can get four 5870s on one PSU, no problem.
5850s are significantly cheaper to buy though. You would save money on the MB if you went with less 5870's. For me the 5870 is the sweet spot. I would love to have a 5970 but I never run into them cheap. Where can you get 5870's for a reasonable price though? Everywhere I'm finding them they're 300+ |
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bitjet
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April 25, 2011, 10:05:39 PM |
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5850s are not as efficient as 5870s. Less stream processors is my guess as to why. You can get four 5870s on one PSU, no problem.
5850s are significantly cheaper to buy though. You would save money on the MB if you went with less 5870's. For me the 5870 is the sweet spot. I would love to have a 5970 but I never run into them cheap. Where can you get 5870's for a reasonable price though? Everywhere I'm finding them they're 300+ ebay... just over 200 shipped. |
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JorgePasada (OP)
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April 27, 2011, 01:50:04 AM |
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So in regards to PCI-E 16x slots.
Most boards have 2x 16x operating at 16x and 16x or 16x and 8x or 8x and 8x.
Even the high end ones with 4 slots are usually only 16x 16x 8x 4x
My question is does having cards in the 8x and 4x slots decrease your mining throughput?
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[Tycho]
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April 27, 2011, 01:51:35 AM |
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My question is does having cards in the 8x and 4x slots decrease your mining throughput?
No. PCIe x1 is perfectly fine for mining |
Welcome to my bitcoin mining pool: https://deepbit.net - Both payment schemes (including PPS), instant payout, no invalid blocks ! ICBIT Trading platform : USD/BTC futures trading, Bitcoin difficulty futures ( NEW!). Third year in bitcoin business. |
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grndzero
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April 27, 2011, 03:33:56 AM |
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The same 5850 is $40 cheaper on newegg with rebate. The coolers on those cards are nice but they don't vent out of the case, they just pass they heat issue from the card to the case. The reference ones are better. |
Ubuntu Desktop x64 - HD5850 Reference - 400Mh/s w/ cgminer @ 975C/325M/1.175V - 11.6/2.1 SDK
Donate if you find this helpful: 1NimouHg2acbXNfMt5waJ7ohKs2TtYHePy
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Jaime Frontero
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April 27, 2011, 03:37:33 AM |
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The same 5850 is $40 cheaper on newegg with rebate. The coolers on those cards are nice but they don't vent out of the case, they just pass they heat issue from the card to the case. The reference ones are better. i've kinda gotten out of the habit of even checking NewEgg, since i found MicroCenter. and the convenience is worth the occasional higher price. i note that MicroCenter's ads include NewEgg pricing... you're right about reference cards though - i spent an extra $50 on my latest mining case. more fans than carter has little liver pills... |
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Veldy
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April 27, 2011, 06:30:24 AM |
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ebay... just over 200 shipped.
But how do you know that the card wasn't run to the point of damage when you get it from EBay. Sure, it may work for games, but 98-100% GPU usage day and day out will reveal the damage. If you get an EBay buyer who has a history of buying a higher end card on Ebay and selling their lower end card [and they indicate they are gamers], then it might be a safer buy. I have no problem buying or selling cards on Ebay, but for this particular purpose, I am wary. You may or may not get what you pay for. Whenever ATI/AMD puts out a driver, a problem is likely to crop up which may or may not cause you difficulty ... will you blame it on the card [and seller] or the driver? You won't ever know for sure. New with warranty is my suggestion for mining. No doubt others feel differently about this and that others have had success using Ebay, but YMMV. |
If you have found my post helpful, please donate what you feel it is worth: 18vaZ4K62WiL6W2Qoj9AE1cerfCHRaUW4x
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JorgePasada (OP)
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April 27, 2011, 07:25:38 AM |
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Where can I get these pci-e 1x risers at? |
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JorgePasada (OP)
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April 27, 2011, 07:32:22 AM |
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As someone who bought out 80% of all 5970's sold on ebay.co.uk in 2011 so far, I must admit that Veldy is saying some quite wise things here.
Yeah I've had bad luck with the Ebay thing is well, and buying bulk from non OEM distributors. Support is pretty much nonexistent. My theory is I'd be money ahead to pay the extra 10 or 15% on the cards up front to know that I can RMA them if anything goes wrong. The 139.00 USD Sapphire 5850's on Newegg right now are looking mighty tasty. How many cards do you have in those nice rackmount cases of yours vladimir? |
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