BSOD with 280 3G Crossfire

[Bear Arms]

It seems like I always get a bluescreen when I put R9 280s in Crossfire. The OCCT test works fine but when the most demanding scene appears in 3DMark I get the BSOD. I thought it was a power issue, but I tried different power supplies. Anyone else have this problem?
Screenshot: https://steamcommunity.com/sharedfiles/filedetails/?id=1432622480

[🦊Λℚ𝓤ΛƑΛᗯҜᔕ🦊]

What temps are your video cards running under occt? If it's at or above 90c then you need to add more fans to the case. You're probably having cooling problems. Also open system info -BEFORE- you run 3dmark and watch the on-screen overlay while 3dmark is running This will tell you both your maximum power and how much power the system is using to see if you actually have enough. Also watch your video card temps while 3dmark is running. It may be possible your gpu is overheating.

[Bear Arms]

Temps are alright but power just climbs and climbs. No idea why.

[🦊Λℚ𝓤ΛƑΛᗯҜᔕ🦊]

Originally posted by Bear Arms:

Temps are alright but power just climbs and climbs. No idea why.

It will flatten out at some point, keep adding a bigger power supply until you satisfy what it needs. Your power supply isn't enough, that's the problem.

EDIT: I see in the game you're using an R9 280 pair. Click on the gpu in the store and click "More info", R9 280 requires minimum 250 watts per gpu, so you need 500 watts just for two of them at stock. If you're overclocking the video cards say +30%, then you would need a 650W unit just for the video cards alone. I have no idea what cpu you're trying to use but you might need another 100~150 watts for the CPU too.

[Bear Arms]

800W is too little. but 1000W works. I just ended up putting in some newer cards and a 650W power supply...

[🦊Λℚ𝓤ΛƑΛᗯҜᔕ🦊]

Originally posted by Bear Arms:

800W is too little. but 1000W works. I just ended up putting in some newer cards and a 650W power supply...

Now you know how to figure out power supply usage and how much you need. :)

[Egoon]

power works in a strange way in this game... it just keeps creeping up till it hits a limit. thats not how it works in real live ....

i got the same problem so guess we need a way bigger psu. even though it already has a 650 in there

[🦊Λℚ𝓤ΛƑΛᗯҜᔕ🦊]

Originally posted by Egoon:

power works in a strange way in this game... it just keeps creeping up till it hits a limit. thats not how it works in real live ....

i got the same problem so guess we need a way bigger psu. even though it already has a 650 in there

Then apparently you've never run benchmarks on real hardware in real life with big overclocked systems and watch it start out at XXX watts and slowly get higher and higher as the benchmark goes on. It totally does that with some configurations with regards to power.

[Egoon]

Originally posted by Impending Rentacle Tape:

Originally posted by Egoon:

power works in a strange way in this game... it just keeps creeping up till it hits a limit. thats not how it works in real live ....

i got the same problem so guess we need a way bigger psu. even though it already has a 650 in there

Then apparently you've never run benchmarks on real hardware in real life with big overclocked systems and watch it start out at XXX watts and slowly get higher and higher as the benchmark goes on. It totally does that with some configurations with regards to power.

granted never ran crossfire. but normaly it jumps rather fast and then stays the same doesnt it?

[🦊Λℚ𝓤ΛƑΛᗯҜᔕ🦊]

Originally posted by Egoon:

Originally posted by Impending Rentacle Tape:

Then apparently you've never run benchmarks on real hardware in real life with big overclocked systems and watch it start out at XXX watts and slowly get higher and higher as the benchmark goes on. It totally does that with some configurations with regards to power.

granted never ran crossfire. but normaly it jumps rather fast and then stays the same doesnt it?

It depends entirely on the test you're running. Current-day versions of futuremark/3dmark, that's mostly how it works. Older versions of 3dmark from back in the day had different tests that were harder or lighter on cards and temperatures and power draw would start out low and increase over time as the test went on.