It just goes to a black screen if I untick restart...
However I can post the crash dumps analysis from WhoCrashed:
On Sat 07/07/2012 09:16:05 GMT your computer crashed
crash dump file: C:\Windows\Minidump\070712-8221-01.dmp
This was probably caused by the following module: dxgkrnl.sys (dxgkrnl+0x5D000)
Bugcheck code: 0x116 (0xFFFFFA800DB824E0, 0xFFFFF8800F588AC4, 0x0, 0x2)
Error: VIDEO_TDR_ERROR
file path: C:\Windows\system32\drivers\dxgkrnl.sys
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: DirectX Graphics Kernel
Bug check description: This indicates that an attempt to reset the display driver and recover from a timeout failed.
The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time.
Google query: dxgkrnl.sys Microsoft Corporation VIDEO_TDR_ERROR
So video driver issue... however is not solved by reinstall of drivers (any of the current working ones for my card).
I do get the sinking feeling that the last crash from W7 bricked my card maybe...?
I've posted on EVGA forums with my situation (since nvidia forums are as usual, offline ¬_¬) :
http://www.evga.com/forums/tm.aspx?high=&m=1664679&mpage=1#1664715