PC freezes at BIOS screen after installing new video card

Hi All,

I am getting a peculiar problem after installing a new graphic card.
After using onboard graphics for a year, I purchased a new “ZOTAC GeForce GTX 650 Ti Boost” card and installed it in my motherboard’s PCIe 2.0 x16 slot.

Before installing the card I updated the BIOS with the latest version and disabled the integrated graphics and selected PCI in the BIOS.

It worked perfectly fine at the first time, I played “Crysis”, “The Elder Scrolls V Skyrim” and “DmC - Devil May Cry” for like 4 to 5 hrs. The next day my PC froze at BIOS screen while displaying post message. None of these happens when I use my onboard graphics

I removed the card and cleaned the PCIe slot and installed the card again, everything worked fine. I rebooted and checked, everything was working fine. Next day the same problem.
I started troubleshooting, removed everything except a single RAM, processor, GPU and keyboard. It got past the BIOS POST and displayed message Hard disk not found. Then I switched off the PC and again switched on after 5-6 hr. Same problem

I goggled and tried all the solutions for 3 days, Then I found a workaround. Whenever my system stuck, I’ll change the 2nd RAM (I am having 2 RAM), to other DIMM slot (Corsair Ram in slot1 and Kingston Ram in slot 3 in duel channel setup), everything will works fine then, my system will stuck again when I start it in the next morning, so I’ll move the 2nd RAM back to the old slot (Corsair Ram in slot1 and Kingston Ram in slot 2 in single channel setup), and everything will work.

So in order to use my GPU, I have to toggle my RAM from slot to other or I have to make some hardware changes.

It seems that when my BIOS finds a hardware change, It scans for the hardware and it won’t stuck. But the next morning if I won’t change any hardware my system will stuck

I tried everything, resetting BIOS, changing display cable (tried DVI and AVI), using single RAM module but nothing worked. I don’t think these is any issue with the driver, RAM or my PSU, as system is getting stuck at BIOS while displaying POST message. Once I get inside Windows 7 or Windows XP (I am having Dual Boot Installation with Windows 7 and XP), my system is perfectly stable. I can play games and surf net for however long I want.

My system configuration is:
AMD Phenom(tm) II X4 955 Processor (4 CPUs), 3.2GHz
ASUS M4A785TD-V EVO/U3S6 motherboard with latest bios (BIOS Date: 07/23/10 17:10:34 Ver: 21.05)
Corsair DDR3 2 GB (1 x 2 GB) PC RAM (VS2GB1333D3)
Kingston KVR1333D3N9/2G – SP (1 x 2 GB)
Cooler Master Thunder 450W
Seagate Barracuda 1TB
AOC 22 moniter connected with DVI cable

Screenshots:

When screen will freeze:

1) at_first_boot_in_morning_1st_screen_stuck(Screen will freeze): https://docs.google.com/file/d/0B_HP5FuwveozcVJ6cy1qTVlEZE0/edit?usp=sharing
2) restarting_after_first_boot__1st_screen(It will move to next screen): https://docs.google.com/file/d/0B_HP5FuwveozTUhaNDVybHhqT00/edit?usp=sharing
3) restarting_after_first_boot__2st_screen(Screen will freeze): https://docs.google.com/file/d/0B_HP5FuwveozYUZSUzAzZE1KUXM/edit?usp=sharing

When everthing will work fine:

4) when_everyting_fine_1st_screen: https://docs.google.com/file/d/0B_HP5FuwveozWkZrNXZHWHFoWTQ/edit?usp=sharing
5) when_everyting_fine_2st_screen: https://docs.google.com/file/d/0B_HP5FuwveozU0NMV0N0Mm1rODQ/edit?usp=sharing

Please help......

Update:
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I removed my Dual Boot Installation of Windows 7 and XP and installed Windows 8. Also I enabled fast boot in bios disabling most of the Startup checks.
Now my PC is working fine since I am getting into windows in 4-5 sec. But when I try to get into BIOS or press F8 to get boot menu, my PC will freeze again. Also my PCIe slot seems fine. I checked it using my friends HD 4850 GPU. Everything works fine with this old GPU.

Is there any incompatibility issue with my AMD motherboard and NVidia GPU?