I have a mini tower Optiplex 7010 that I upgraded to a Visiontek Radeon HD7850 http://accessories.us.dell.com/sna/productdetail.aspx?c=us&l=en&s=dhs&cs=19&sku=a587748.  Does anyone have problems with the system detecting the pci card when booting up?  Specifically from a cold boot (system powered down and at room temperature).  I have attempted different cards and they don't show this symptom, but they are all older pci-e 2.0 cards versus the above which is 3.0.

All steps taken:

• Visiontek in different system: No issue
• Different Graphics Cards in 7010: No Issue
• Different Power supplies in 7010: No Difference
• Update to latest 7010 Bios (01/13): No Difference
• Even attempted different Video Card bios from another manufacturer with a bit more updated AMD Bios: No difference

To get system to see card:

1. System must be "warmed up" per on state for about 7 minutes or so.
2. Powering system down, laying system on side and powering back up the system is more prone after 1 to "see" the card.

It sounds like from the above its a cold solder joint or faulty capacitor on the motherboard.  But the other graphics cards not showing the issue is what is throwing me for a loop.  The only two theories I have to account for it would be again, there is a specific error in the pci-e 3.0 circuitry route. 

Does anyone or even a Dell tech have access to a current gen AMD card with an external PCi-e adapter to test against on this system?