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Author Topic: Running a 5970 and a 7970 together  (Read 1928 times)
tgbtc
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May 07, 2012, 05:53:03 PM
 #1

1000W psu, gigabyte X58-UD7 board

I can't seem to run both at the same time, when I plug them both in, I get no video on any of the outputs on either card (not connecting the crossfire patch between the two as they are not cfx compatible with eachother).

I can boot it with the 7970 plugged into the main pci-e slot and the 5970 plugged into the pci-e slot but with the two extra power plugs not plugged in (the fans run at 100% and it is not detected).

I am plugging the 7970 into the first pci-e slot (16x?) and the second into the 3rd slot as configured below:

http://i.imgur.com/aYMVo.png

The odd thing is... it boots to windows when doing this - I get the windows chime after a bit of waiting.

I guess I could try remote desktop into it while it's running but with no output.


It's also worth mentioning I have an LSI 9280-8i plugged into the last pci-e slot at the very bottom.

Also, when crunching with the 7970 at 550Mhash/s my computer beeps loudly after a while -- not sure why it would be doing this as with the 5970 (which takes more juice) it wasn't doing it.
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tgbtc
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May 08, 2012, 05:21:05 AM
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tosku
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May 08, 2012, 07:58:58 AM
 #3

Which of the two cards do you connect to your monitor? Try connecting both, and let the monitor switch the input a couple of times.

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May 09, 2012, 05:54:02 PM
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I have two monitors (both 30", so they use dvi-d) and I've tried every combination of monitor and plug.  It's like both adapters refuse to send output when they are plugged in together, but each on it's own works fine.

edit:
reading through the gigabyte manual, it looks like there may be an issue having the cards in these 2 slots and the raid card in the last one.  I'll play around with the configurations also.

It says to use both x16 though, which I am.

http://i.imgur.com/twKuC.png
tgbtc
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June 04, 2012, 05:48:46 PM
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Even with just the 7970 plugged in and crunching, I get a beeping noise after 10-15 seconds.

Has anybody else ran a 5970 and 7970 in the same system?
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June 04, 2012, 06:01:15 PM
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1BTC bounty.  If a mod can move this to support I'd appreciate it.
logicus
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June 05, 2012, 05:53:40 PM
 #7

gigabyte manual
........................................
Note 3) The PCIEX8_1 and PCIEX8_2 slots share bandwidth with the PCIEX16_1 and PCIEX16_2 slots espectively. When PCIEX8_1 is populated with an expansion card, the PCIEX16_1 slot will operate at up to x8 mode; when PCIEX8_2 is populated with an expansion card, the PC IEX16_2 slot will operate at up to x8 mode.
........................................

Try to boot without  LSI 9280-8i


Try plug 5970 in PCIEX16_1 and 7970 PCIEX16_2 and LSI 9280-8i in PCIEX16_2

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tgbtc
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June 09, 2012, 05:30:55 AM
 #8

Hard to boot without the 9280 because the o/s is on it, but I'll give it a shot to see if I can get video on it.

Currently x16_2 is the one being shared, so the 7970 would be at 16x and the 5970 and 9280 would be sharing 8x each, shouldn't affect the 7970's ability to display though.
logicus
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June 09, 2012, 03:04:54 PM
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sorry  Cheesy ,5970 in PCIEX16_1  ,the 7970 in PCIEX16_2 and LSI 9280-8i in PCIEX8_2
5970  at 16x and the 7970 and 9280  8x each - 7970 is single core,5970 is dual core  Wink

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bjornsni
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June 11, 2012, 08:54:02 PM
 #10

I have a rig that has 2x7970's and 1x5970

I have the 5970 on top then 2x7970s below...all spaced out for heat.

Video Feed off of the 5970

+1 fjordbit +1 fefox +1 tgmarks
cirthix
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June 11, 2012, 09:13:16 PM
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I run one hd5970 in the primary x16 slot and one hd7970 in an x4 slot.

The display is attached to the 7970, no image during post, have to attach a monitor to the 5970 to do pre-boot stuff.  Once the drivers load, display comes up.

I have the display on the 7970 because it is a better card for gaming.

As for mining, it works well, but only with older drivers.  12.5b and 12.6b did not play nice with the 5970 (no display attached=idle gpu, trying to sleep or something), so go and use 12.4 drivers.
tgbtc
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September 18, 2012, 02:19:50 PM
 #12

I can get it to boot without the lsi raid card, but no other combination works... I think it might be a pci limitation.
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