My First Open Air Rig - 4x 6970 1x 6950 - 2gh/s - "The Mine Cart"

[CrazyGuy]

"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.

[chungenhung]

can you upload pictures of other views? I want to see how you are holding those cards up.

[stryker]

can you upload pictures of other views? I want to see how you are holding those cards up.

By the process of "jamming em in" I think 

It is rather a "novel" design though.... very fitting with the homer avatar

[CrazyGuy]

Haha, I'll upload some more pics tonight. Couple of rods going across the crate holding the cards up.

[deslok]

i love the idea but i'm affriad you're going to melt the milkcrate!

[worldinacoin]

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?

[CrazyGuy]

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

[worldinacoin]

Kinda low yes, but there is some real mechanical engineering ingenuity

[CrazyGuy]

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.

You rates are quite low.
You should be able to pull ~336 MH/s at stock cloks and
~ 371 MH/s @800/300 for each core on the 5970.

Yeh, both cores are under 60 degrees so I figured I could push it a bit more. Problem is, I'm hovering right under max draw on my PSU. I have the minecart switched off at the moment and I'm selling a few of the cards in the marketplace threads.