Crossfire Crashing

[Randarr]

So before in my previous system I had an FX-8350 on a 990FX board (40 PCIE lanes) and 2 gtx 780s in SLI, now I have a 4670k on a z87 board and just recently a pair of RX 580s, but I'm getting a lot of crashing issues when enabling crossfire. Purely based on instinct I would say the system is crashing when reallocating the PCIE lanes when enabling, but that's just a guess, but before I was also running nvidia cards so maybe it has something to do with crossfire as opposed to SLI. Does anyone perhaps know what the issue is and more importantly how to fix it? preferably without pulling out the second card, but if I have to I suppose I will.

[Windows7ge]

Does the motherboard say it supports CFX? It may not be necessary that it says it does but sometimes it has to be for SLI to be an option. If it isn't a physical limitation (if the two GPUs are the only expansion cards installed) then it's likely a driver issue. You can try using DDU and re-installing the latest AMD display driver. Sometimes it's also an issue of the OS not having enough support with the platform but socket 1150 isn't that old. I'd expect Windows 7/8/8.1/10 to work fine. Then there's also the issue of that AMD GPUs are power hungry. Does it only crash once in game? That could be a lack of power if your PSU isn't strong enough to run 2.

[Randarr]

It crashes as soon as adrenaline starts upon booting the OS, not making it to a load situation, or if I had it disabled and then enable it it crashes. The power supply is an EVGA 1000GQ saved from the overclocked 8350 and GTX 780s I'm consuming far less power than I did then. My motherboard a GA-Z87X-UD4H states support for both crossfire and SLI. No other expansion cards are installed, no M.2 SSDs or anything like that, without those cards there shouldn't be anything else taking up processor lanes evidenced by the fact that when a single card is installed it has all 16 to itself according to GPUz

[Stefan Payne]

11 minutes ago, Randarr said:

It crashes as soon as adrenaline starts upon booting the OS

That sounds like a dead or dying GPU.

[Randarr]

1 minute ago, Stefan Payne said:

That sounds like a dead or dying GPU.

Both work fine under load individually and I purchased both of them brand new a few months apart

[Stefan Payne]

6 minutes ago, Randarr said:

Both work fine under load individually and I purchased both of them brand new a few months apart

Go in BIOS and look for PCIe Gen stuff, disable Gen3 or force Gen2.