D5400XS won't post with Multi GPU cards

[Arkade]

Hello, Recently After reviving my old computer, the D5400XS Skulltrail from retirement, I have found it won't post with the Dual GTX 295's I have in it. I have tried swapping in 2 9800GX2's as well, but this failed too. All the cards post in normal computers. I have gotten a 9600GT, a GTX 260 216 core, and a GTX 570 to post inside the Skulltrail. Is there a reason suddely dual GPU cards won't post?

Tested all the GPU slots, tested mutliple PSU's, and Have watched the debug output during post. (GTX 295 completley halts the post, and 9800GX2 causes error E4 with 3 beeps, supposedly meaning no Memory?)

 

[Darknecron]

What kind of specs does this PC have? Minus the GPUs, obviously...

BTW, re-seat your memory.

 

[Arkade]

2 Intel X5450's, oc'ed via bus freq to 3.6ghz(bus from 333 to 400mhz, system was tested at stock speed, still no post)

2 stick of Kingston KTM5780/8G 667 mhz ram.

2 Corsair CX750m PSU's

 

[Arkade]

Weird it posts with my 7950GX2. Guessing all my other dual GPU cards are bad or something. Cause i've tried 2 7950 GX2's and they worked fine, will have to look further.