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RX480 Crossfire issues

cDc1979

cDc1979

cDc1979

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Joined
8 May 2007
Posts
35
Hello all.

I have two 4gb RX480's and I cannot seem to get the second card working. I initially ran DDU, installed the drivers and rebooted fine with a single card. Then I add the second card but as soon as windows comes up the machine just resets. It detects the card as the fan stops (I assume the zero fan rpm bit of the driver kicks in) but then as soon as the fans stop the PC reboots.

If I take the second card out and then reboot it messes up the drivers so after that even a single card wont work.

I have run DDU again, reinstalled the latest driver and now back on a single card working absolutely fine, but can anyone give me any tips on getting crossfire working?

Without any drivers windows boots OK with two cards in, and I can see two "unknown" cards in device manager, both seem to be powered up fine. Any tips/tricks I could try?

I have an Asrock Extreme 4 Z77, I5 cpu and a corsair tx750 PSU
 
Put both cards in before you install the drivers.

After installing the drivers leave the PC alone for 5 minutes even if it reboots a couple of times.

If the drivers install ok, use MSI afterburner to disable ULPS.
 
cDc1979 said:
I have an Asrock Extreme 4 Z77, I5 cpu and a corsair tx750 PSU
Click to expand...

That Corsair PSU is 10 years old model, Bronze rating......

Assuming that you have connected the cards each connector on each different cable (not 2 connectors on same cable) it might work.

But personal I am not trusting that PSU run 2 cards nowadays.
 
PSU mentioned but I've also had black screens when booting Windows after installing multiple cards caused by Crossfire automatically enabling and ULPS crashing the additional GPUs.

One way to get round these sort of issues is to uninstall drivers first or just boot into Windows safe mode (F8 cold booting) disable GPUs. Reboot into windows then enable first GPU (use PCI slot numbers to identify) and try to disable ULPS with Wattman/AF/Strixx etc. and then enable 2nd (or 3rd or 4th) after.
 
I'm running a bronze rated TX850 and it hasn't missed a beat in the 5 years (roughly) I've had it, They're solid psu's unlike the RM that replaced them. I'd look elsewhere before blaming that, As mentioned try the gpu's individually then as Kaap said install both first and then do a driver install. Then if the problem persists start in on the settings.
 
nashathedog said:
I'm running a bronze rated TX850 and it hasn't missed a beat in the 5 years (roughly) I've had it, They're solid psu's unlike the RM that replaced them. I'd look elsewhere before blaming that, As mentioned try the gpu's individually then as Kaap said install both first and then do a driver install. Then if the problem persists start in on the settings.
Click to expand...

Less wattage(750W) and 10 years old, I'd point to PSU first.
 
I'm running overclocked RX 480 with i7 4970 on a 350W superflower bronze PSU in my HTPC without any issues.
 
Well some good news...

I had another go, and this time after installing the second card I booted into safe mode and manually disabled the second card in device manager. Then I booted back into windows (normally) and when I enabled the card in device manager it appears to have worked - the PC boots and I can see crossfire is now enabled in the AMD software.

Must have been something to do with windows attempting to detect and install the driver automatically during boot up.

One weird thing (maybe to do with ULPS?) is that the second card's sapphire logo doesn't light up when windows starts, but does as soon as i do anything it does. Have not yet tried it in anger - will try some gaming later but at least its booting now. Will try run some benchmarks too.

Thanks all!
 
subbytna said:
Less wattage(750W) and 10 years old, I'd point to PSU first.
Click to expand...

750w is more than enough for current gen(polaris and pascal 1070 or lower) mgpu(2x) setups. Just because the model came to market 10 years ago does not mean its no longer adequate. Not that many advances has happened anyway in that market.
 
Phixsator said:
750w is more than enough for current gen(polaris and pascal 1070 or lower) mgpu(2x) setups. Just because the model came to market 10 years ago does not mean its no longer adequate. Not that many advances has happened anyway in that market.
Click to expand...

I suppose yeah, fair point.
 
This is why I like these forums. Everyone has a different bit of advice and they all attack the problem from different angles which gives the OP a lot of things to try to fix the issue with.

It's even better when a fix is successful for the OP too. :)

Now let's cut out this nonsense and get back to arguing over AMD and Nvidia :p
 
nashathedog said:
I'm running a bronze rated TX850 and it hasn't missed a beat in the 5 years (roughly) I've had it, They're solid psu's unlike the RM that replaced them. I'd look elsewhere before blaming that, As mentioned try the gpu's individually then as Kaap said install both first and then do a driver install. Then if the problem persists start in on the settings.
Click to expand...

Agreed, the TX series were solid PSU's. I'm still running the 850W on my bench table and it's never once failed me, even when i ran a 295x2/290 crossfire with a i7 [email protected], it literally should have blown up, but it ran through firestrike no problem :) (disclaimer... this was 1 run not a regular gaming rig)

On topic, I had very few issues with crossfire in windows7 (must be lucky), wouldn't touch multi card setups under windows 10, had no end of issues trying to bench stuff with 2 cards, seems to crash to desktop a lot with driver issues.

I would still do a few loops benchmarking both cards individually to make sure they are stable.
 
Seems to be purring now tried a bunch of games and seems stable. Thanks for all the advice - much appreciated. Hope this thread might help someone who has similar spec & issues!

Here is a little pic of the beast for good measure :-)

ioesfo.jpg
 
Why did you get 4GB versions for crossfire setup.? So much power and you won't be able to max out some games now not not to mention in the future.
 
my god, i think i need another rx480, it looks so pretty :P

id be keen to find out some benchmark results with that.
 
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