My Custom Case Build

[CartmanSPC]

cgminer running smoothly. Think I will increase the fans from 80 to 85%.
I suspect that GPU1 is actually the left most GPU and GPU0 is to the right of that one.

[kslavik]

cgminer running smoothly. Think I will increase the fans from 80 to 85% on the first two GPUs. The processor is right under those two so I'm thinking that's why they are 10 degrees hotter.
I suspect that GPU1 is actually the left most GPU and GPU0 is to the right of that one.

What are your settings for 7970: engine, memory, voltage, thread count and bios version? I have the same MSI 7970, but it just refuses to go past 660 and at the same time I can get 7950 to mine at the same speed.

Thanks

[CartmanSPC]

Try 1055/1500...or better yet come to IRC and we can help you there.

Server: irc.freenode.net
Channel: #digitalcoin
Webchat can be found at: https://kiwiirc.com/client/irc.freenode.net/#digitalcoin

[RChevalier]

@CartmanSPC

Very nice build man... much envy going your way for sure.

Are you just using the card fans to cool? or do you have anything else pushing air through them?  It's gotta be pretty warm around that thing.

[krayzie32]

Eh... That MSI is about 250 now... Hope you waited to buy...
Case looks great tho.

Thanks! Where is the MSI 7970 selling for $250?! The cheapest I have been able to find is $377.36 after tax and rebates.

Funny what less than a month can do for GPU pricing, 7970s can be had for 279 right now on Newegg after rebate.  Great looking rig BTW.

[CartmanSPC]

Are you just using the card fans to cool? or do you have anything else pushing air through them?  It's gotta be pretty warm around that thing.

Just the card fans. Ambient temperature is 68 degrees. Found that one of the GPUs was running hotter than the rest so I moved it to the coolest spot in the rig. I'm sure it's due to the thermal paste not being put on correctly from what I have read.

Temps after moving GPUs around. I have pretty much confirmed that GPU 0 is actually the second physical GPU from left to right in the rig.

Before:                                After:

[CartmanSPC]

Funny what less than a month can do for GPU pricing, 7970s can be had for 279 right now on Newegg after rebate.  Great looking rig BTW.

Yup, that's why I went ahead and bought another one The ones I use are just a bit pricier than the cheapest ones and temporarily went down to $299 after rebate. They are up to $344 after rebate now..should of bought more but funds are a bit tight

[PMB]

The second power supply is also a Corsair AX1200i. This picture shows the two CorsairLink interface units. Since CorsairLink only supports reporting on one PS at a time I have to disable one and then enable the other (in device manager) to see it's individual power usage. A nice surprise was that even though some of the GPUs are being used on the second power supply, CorsairLink still see's them for monitoring.

Hi!

Nice setup!!!  Very clean! A change from the confusion of cables We usually see :-)


I've been thinking of linking 2 psu's together, what did you use to link the 2 psu's?


regards,

P.

[BTC Electronic LTD]

We have the OEM case too.

[CartmanSPC]

I've been thinking of linking 2 psu's together, what did you use to link the 2 psu's?

Thank you!

To connect the two PSUs together I am using this adaptor from buyahash:

http://buyahash.com/product/dual-psu-24-pin-cable-adapter/

There is another adaptor you can use from www.add2psu.com but it requires a molex connector.

[kuusj98]

This is really awesome!
But I think it will kill your ROI

[CartmanSPC]

This is really awesome!
But I think it will kill your ROI

What's ROI?
Just kidding..this is a hobby for me so I didn't approach it with the intention of maximizing profits. Heck, If I make anything at all it's all gravy 

Unfortunately my attention has drifted elsewhere so I'm not into it as much.

[Zeek_W]

In my head I like to read this thread with the post dates a year prior and marvell at it lol.

In all seriousness - great setup! If all else fails you can use it as a render farm or rent for WPA cracking

[ZetaOS]

love to see this rig of yours whit this cards instead of videocards.


or...

[MerchantMiner]

love to see this rig of yours whit this cards instead of videocards.
http://virtualminingcorp.com/shop1/img/p/5/5/55-thickbox_default.jpg

or...

http://thegenesisblock.com/wp-content/uploads/2013/08/bfl_monarch.png

These cards dont exist and they never will , cant you tell the fasthash stuff is fake and photoshopped lol people beware of scammers. BFL cant make that card its too powerfull for the size of the tech that exists and cooling it would need min water cooling tower.

Have a word with ya self lol

[CartmanSPC]

Finally got another card installed for a total of 6. I am at my power limit (15.656 amps) so this will be it until I can get more utility power.

[zedicus]

Nice case man! How much clearance you got above the mobo?  I see you got the risers folded ..

and how are you securing the cards are you using an inner frame just for the gpus.. is that the metal i see on the sides? 


I was thinking of doing this and i ended up just grabbing a pre fab..

Cheers

[CartmanSPC]

Thanks zedicus!

I have enough clearance to have just a bit of space between the  CPU fan and bottom of the PCIe riser cards. On the top side there is enough to clear the power cables in case I decided to enclose the case with a top.

Currently the cards are not secured to the inner frame. They are just resting on it. In earlier pictures I showed and had planned to secure the cards with another piece of aluminum but the spacing for it was lost due to the rivet being too low. Not a big deal as it will not need to be moved but when it does the GPUs will need to be removed.

6 GPUs may be the max this case will support utilizing just the stock GPU fans. 7 may make them too cramped to allow adequate airflow.

[CartmanSPC]

6 GPUs may be the max this case will support utilizing just the stock GPU fans. 7 may make them too cramped to allow adequate airflow.

So with 6 GPUs the temps were getting into the low 80's even with the GPU fans bumped up to 90%. It was time to figure out a way to cool the GPUs some more so I decided to try adding auxiliary fans.

It blew me away how much this helped!

(2) 200mm fans and GPU fans back down to 80%:


From left to right GPU#s: 2 0 3 4 5 1


These 200mm fans fit almost perfect. I could drill holes to secure them but will most likely just use zip ties. If I ever make another case I may try to fit them inside the space between the front/back (depending on how you look at it) of the case and the GPUs.

Yes, they are blowing air at the GPU exhaust vents since these particular models mostly expel air the other way. They are plugged into motherboard fan connectors and are not running at full speed. Very happy with the results and surprised that it helped as much as it did.

[cp1]

I wonder what another two at the other side and enclosing the case would do.