Make an offer:

2 ea. 4x -->4x + Molex powered
2 ea. 4x -->16x  + Molex powered

All are 19cm long and working fine when pulled. I want to sell them as a bundle, no cherry picking please.

I ordered a kit for $175 then modified it to suit my mining needs. It mounts the mainboard and up to 6 video cards and is quite compact. I used it with 5 cards (1 5970 and 4 5850s) and still had room for one more card. With my setup it gave ~1.5 - 2 inches clearance between cards for good cooling. I can add PCIe extenders, some powered, if you want those for a little extra bitcoin.

See pics down a few posts...

[What a mining Bundle! Supports 5 PCIe Cards!]

<Hype>What a mining Bundle! Supports 5 PCIe Cards!</Hype>  

OK, really, this a fine mining platform and it includes everthing you need except for a PSU, the video cards, and a case or rack (I'm also selling the semi-custom rack this setup was in). All in excellent working condition when pulled. I ran this unit with an ANTEC 1200 HCP PSU, 1 5970, and 4 5850s and it churned out 2.5GH/s for 9 months with those 6 cores.

Included:
1. ASRock 890FX Deluxe4 Mainboard with 3 PCIe x16 and 2 PCIe x1 sockets
2. AMD Sempron 145 CPU w/stock fan
3. 1GB  RAM Module
4. 4GB Vebatim USB Drive
5. Original Box with all (unopened) accessories

Price: 25 Bitcoin shipped within US

PM me your email and I send some pics.

[20 bitcoin]

Are you looking to setup a miner? I have an extra used mainboard setup that I will sell for 20 bitcoin for a bundled package. Just add a storage device, PSU and four video cards of your choosing to begin mining. This setup was proven stable and turning out 1.26GH/s with four little 5830s when I took it offline.

Free shipping within US.

The package:

1. Biostar A870U3 Mainboard
(manufacturer's specs: http://www.biostar-usa.com/app/en-us/mb/introduction.php?S_ID=524)

2. AMD Sempron 140 CPU

3. 1GB DDR3 1333 RAM module

4. 4 x PCI-E Risers (un-powered)

Need a working 5830 shipped to zip 87506. Will PayPal $70, please no failing fan.

Take a look at what's coming in a few months. I know, they'll be massively expensive for mining, but if PCIe 3.0 is backward compatible to 2.0 it could be slot heaven, up to seven (yes, 7!) on a couple of these boards.

Check it out: http://www.anandtech.com/Gallery/Album/1376#1

[WHAT WORKS]

OK, catfish and I have had some bad experiences (read expensive) with motherboards that fail to support four or more GPUs even though they have five or even six PCIe slots. We want this to be a single thread info source on motherboards that have been proven to fully function with four or more cards (and those that don't).

PLEASE, use the following format:

WHAT WORKS
Motherboard Brand:
Motherboard Model & PCIe Slots:
Power Supply Brand & Model:
Number & Model GPUs:
Extender Cables w/Molex Power?:

WHAT DOESN'T WORK
Motherboard Brand:
Motherboard Model & PCIe Slots:
Power Supply Brand & Model:
Number & Model GPUs:
Extender Cables w/Molex Power?:

The fan on one of my Sapphire 5850s died with a screech. The card was immediately shut down and is apparently undamaged. I want to buy a NTK FD9238H12S fan assembly for a replacement (card is out of warranty/no receipt). Anyone know where to obtain this part in the US? Several 5xxx reference series GPUs use this fan, including the 5970 I believe.

I bought this motherboard because it had 2 x16 and 4 x1 PCIe slots with visions of a 6 GPU rig. However, I'm having trouble maintaining stable hashrates with only four GPUs. Here's the setup:

New Antec HCP 1200W PSU
MSI 890FXA-G65 motherboard
AMD Sempron 140 CPU
Kingston 1GB DDR3 RAM
2 x 5830, 2 x 5850 GPUs with PCIe extender cables
LinuxCoin 0.2.1b persistent from a 4GB flash drive

I'll startup the GPUs one at a time (they are OC'd at 975,300 for the 5830s and 875,300 for the 5850s) and the first three hit expected hashrates of 308 MH/s for the 5830 and 355 MH/s for the 5850s. As soon as I fire up the 4th GPU hashrates fall off and range from 225 - 308 for all four cards and fluctuate dramatically.

While this seems like a voltage issue to me the rig draws only 620W max, but it does fluctuate over 100W. The GPUs are plugged into the 8 x 6pin PCIe PSU cables, the 8pin CPU power cabe is plugged into the M/B, and I'm using the MSI supplied 6pin-to-2xMolex adapter (plugged into 2 separate PSU molex lines) for the M/B PCIe power.

Any ideas?

I know, it's not a miner, but the build is really beautiful and may give someone here some interesting ideas.

http://www.totalgeekdom.com/?p=572

Free Shipping within continental US! I bought this thinking I'd use it in a miner, but I'm going to stick with 5830s. Never installed by me, includes the complete package as provided by MSI.

Manufacturer's website for specs and pics: http://eu.msi.com/product/vga/R6950-2PM2D2GD5.html

http://www.highspeedpc.com/Merchant2/merchant.mv?Screen=CTGY&Category_Code=StdTechStation

I think this may be the answer I'm looking for. Mount the PCIe rail higher, add a rear GPU support rail, and that would pretty much be my ideal caseless setup for 4 GPUs. What do you think?

http://www.antec.com/Believe_it/product.php?id=NzA0

Anyone using this case with 3 or more GPUs? Expensive, but very cool looking.

For those of us that want to go caseless, but eschew the pizza box approach, take a look at this:

http://www.frozencpu.com/products/12236/cpa-517/Lian_Li_Replacement_PC-Q06_Modders_ATX_Aluminum_Motherboard_Tray_-_Anodized_Black_Q6ATXB.html#blank

Is it possible, with a PCIe entender cable, to support three GPUs on the MSI 870-G45 AM3 AMD 770 ATX AMD Motherboard? Has anyone done it?

As a noob miner I'm disappointed in the reliability of pools. After a week of mining I'm now forced (due to DDoS attacks on BTCGuild and BeepBit) to start up a third pool account. Is this typical? What is being done by pool owners to increase reliability?

What's your choice for motherboards that support 4 GPUs (caseless)?

"Temporarily disabled while being DDoS'd." What does this mean?

I'm curious to know if there are bandwidth consumption differences between these two mining methods. I can only obtain wimpy DSL 1.3Mbs/0.75Mbs actual on my system, and nothing faster is available at a reasonable cost.