Firstly, pc spec etc
Mobo = Gigabyte GA-N650SLI-DS4 http://www.gigabyte.com/products/product-page.aspx?pid=2514#ov
RAM = Corsair XMS2 6400c5c 1.8v ver 5.1 (currently at 2*2gb sticks)
Graphics Card = Nvidia Geforce 260 GTX "approx" total memory 2671 MB (as read from dxdiag)
CPU = Intel Core 2 Quad @ 2.40hz(4 CPUs)
The issue im having is im trying to upgrade to 8gb or ram on the above mentioned ram sticks but when ever i go above 2 sticks and enter the realms of >4gb ram Windows gets as far as the "Starting Windows" screen and thats it, it wont even play the little animation. The usual hold-down-power for 4 secs to get a power down goes to a single push at this point (unsure if thats relavent). I have 4 slots and I have tried all the sticks in all the slots (its been a long night). This is all on the back of a new install after something went horribly wrong in the msconfig interface and my machine was stuck in a loop asking if i wanted to repair windows or start normally.. both would just reboot the machine back to those options.
In the MSconfig interface i have unticked the Maxi mum Memory (an IT support told me to tick it and set it to 0 which is how i got the above issue)
Regarding BIOS.. my BIOS can see i have 6gb running when i have the 3 sticks in, not even got to 4 sticks yet. But it just seems windows doesnt wanna play ball. Iv never ungraded my BIOS before as all the warnings signs tell me not to unless its really REALLY needed.
I really hope someone can help with this as iv ran out of things to try.