Does the H81/H61 Pro BTC Need Powered Risers? - page 3.

Ratman2050

member

Activity: 81

Merit: 10

Quote from: lorbas on February 08, 2014, 01:54:06 PM

@Ratman2050: wich Driver Version are you using to run 6 Cards?

13.1 driver. The driver is from this thread: https://bitcointalksearch.org/topic/m.2526454

Here is the link: https://www.dropbox.com/s/1hoxkz0y8fe933g/13-1_vista_win7_win8_64_dd_ccc_whql%20Working.exe

lorbas

member

Activity: 82

Merit: 10

@Ratman2050: wich Driver Version are you using to run 6 Cards?

Ratman2050

member

Activity: 81

Merit: 10

It works great out of the box with the right driver it recognizes 6 GPUs, and I think if you plug the 2 molex into the board you can run 4 GPUs unpowered, but after that you might need powered..

twistedtrick

full member

Activity: 154

Merit: 100

Wait, so you're saying the motherboard with the word "BTC" in it turned out to be a gimmick of sorts? No way!

Jokes aside, I was really hoping unpowered risers would work fine with this board as I am going to order parts this week and would love a motherboard that works great out of the box with more than 4 GPU but I am having a lot of trouble finding something like that.

Ratman2050

member

Activity: 81

Merit: 10

Okay so I am running 6 7950's right now and I have a 1000w and 700w psu running. I plugged in all 6 cards and and I have the 4 pin molex going into the 2 slots in the board, it turns out only 4 or 5 card will run out of the 6 for some reason.

I ended up having to use 4 powered risers and leave 2 unpowered for all 6 to work, I might be able to get away with 3 powered and 3 unpowered but w/e. It looks like you still need powered for this board...

wpgdeez

hero member

Activity: 728

Merit: 500

I wouldn't bother. I have a G3 sniper quad 7970 setup with extra power for the mobo and have been running that rig 24/7 for 9 months without a single problem. Im using x16 unpowered risers on all of them.

ohya?

newbie

Activity: 14

Merit: 0

Yes always use powered risers so shit don't melt

crazyates

legendary

Activity: 952

Merit: 1000

Powered risers are so that you don't pull too much power through your MB. If each GPU pulls 25W, a 6 GPU rig means you'll pulling 150W through a board that's not designed to have that much power running through it. Things get hot, and they fry.

The Pro BTC MB has 2 separate molex connectors for supplying extra 12V power to the MB, specifically to the PCIe lanes. It's designed so you won't have to use powered risers.

I mean, you still could if you wanted to, but it'd be kinda pointless.

Ratman2050

member

Activity: 81

Merit: 10

I keep seeing mixed answers to this question. One blog says using unpowered risers still won't work even though the mobo has 2 4 pin molex connectors, however, others have said you shouldnt use any powered at all?

Is it safe to say if I want to run 6 7950 GPUs maybe I should use 3 powered and 3 unpowered?

Thanks

Topic: Does the H81/H61 Pro BTC Need Powered Risers? - page 3. (Read 20419 times)