Hi guys,
I got myself into troubles while upgrading my original 760 to 970.
I have X51 R2 with 330w PSU.
I bought this card https://www.evga.com/Products/Product.aspx?pn=04G-P4-1970-KR
but after I replaced my original GPU all I got is blank screen after boot. I can't access BIOS, my keyboard does not lit up, it just stays there with black blank screen with no sound. I tried to use VGA cable with DVI2VGA convertor - no luck, same outcome.
So I tried to put back my 760 to check there's no damage caused on MB or whatnot but it boots up correctly with it.

Any tip what is causing this? I read tons of threads and everyone is just reporting that 970 is working for them w/o any issues. Well, not for me though 
Is this a GPU problem or PSU? Am I missing something?