[.25 BTC Bounty] Cannot use more than 3 cards on GigaByte motherboard - page 2.

Trini8ed

sr. member

Activity: 375

Merit: 250

<3 Bitcoins

Quote from: joshv06 on December 26, 2013, 01:33:52 PM

Wouldn't 1500W be enough for 4 R9 290's? I used to run a full system with fans, 2 hdd's, 4x 7970s on an Enermax 1350W.

Also, I made powered risers. They work, but it's the same thing. I can't get 4 cards at once to work.

My board does not require shorting the a/b pins. The 1x riser works.

Have you tried a different board? Maybe the single board you are testing on isn't functionally correctly, I'd try another board.

af_newbie

legendary

Activity: 2702

Merit: 1468

Quote from: joshv06 on December 26, 2013, 01:33:52 PM

Wouldn't 1500W be enough for 4 R9 290's? I used to run a full system with fans, 2 hdd's, 4x 7970s on an Enermax 1350W.

Also, I made powered risers. They work, but it's the same thing. I can't get 4 cards at once to work.

My board does not require shorting the a/b pins. The 1x riser works.

I run three R9 290x with 1200W PSU and I put the 4th card on 450W second PSU.
All four are on powered risers. I'm using the same motherboard, default BIOS settings, Sempron 145 CPU, SSD drive.

Cascaders28

full member

Activity: 195

Merit: 100

What BIOS version are you using?

I think you'll actually need to make sure CF is off in the BIOS and you're not using any bridges for this board to support more than 3 cards. That is where my mind starts at least...

vm1990

legendary

Activity: 1540

Merit: 1002

this might sound strange but crossfire the card in the x1 slot to the 1st card in the 1st x16 slot

1500w should be more than enough for these configurations

joshv06

hero member

Activity: 991

Merit: 500

Wouldn't 1500W be enough for 4 R9 290's? I used to run a full system with fans, 2 hdd's, 4x 7970s on an Enermax 1350W.

Also, I made powered risers. They work, but it's the same thing. I can't get 4 cards at once to work.

My board does not require shorting the a/b pins. The 1x riser works.

dE_logics

hero member

Activity: 686

Merit: 500

Oh, and you saw this?

https://litecointalk.org/index.php?topic=2702.915

dE_logics

hero member

Activity: 686

Merit: 500

WOW MAN WOW!!!! Shocked

What OS?

woutersteven

member

Activity: 89

Merit: 100

PSU issue, use a 2nd PSU and make sure you short the plug on the 2nd PSU otherwise it wont work. http://www.overclock.net/t/15751/info-can-i-use-two-power-supplies-with-one-computer

coin123123

sr. member

Activity: 252

Merit: 250

now enough watt.
try to power two cards from second psu.

joshv06

hero member

Activity: 991

Merit: 500

I cannot get 4 cards working with 1x risers or 4 cards working at all for that matter. I have never POSTed with 4 cards plugged in.

Specs:

GIGABYTE GA-990FXA-UD5 AMD AM3+ 990FX Motherboard
R9 290 Video Cards
Enermax Revo 1500W PSU
8GB Ram

Works when:

3 cards plugged directly work
1 card with PCI-E 1x riser in 1x port works
3 cards in PCI-E 16x slots with 16x risers work

I get black screen (no POST) when:
Using 2 cards directly plugged in and the other 2 in 16x risers.

I live in Houston Texas and have a setup here at home. I will give .6 btc if anyone wants to come and try a solution.

Topic: [.25 BTC Bounty] Cannot use more than 3 cards on GigaByte motherboard - page 2. (Read 3643 times)