Ok, so my current cpu cant play guild wars 2 very well (12~30fps in populated areas) I am looking for an upgrade and I know intel is the best way to go, but I dont have the money for an intel board and cpu.
Ok, to get a few things stright, The A10-5800K needs a board that has an FM2 socket, While the Phenom II x4 965 needs an AM2+ (Note the plus) or AM3 socket. So AM2+/AM3 is not compatible with the FM2 socket, Pin layout is different.
Out of the 2 I would pick the Phenom II x4 965 with an AM2+/AM3 board, That will give you the best performance out of the 2.
Also if you into overclocking I would get the Phenom II x4 955 and OC it a little, its cheaper, Or heck even cheaper get the Athlon II x4 640, Lacks the cache but isn't a big deal in gaming.
A10-5800K has an on board video card which is way it uses the FM2 socket, since you have a video card, I wouldn't worry to much about the A10-5800K.
if all you're worried about is Guild Wars 2 the new APU may run it fine without the extra card. Having the extra card should enhance that......... however, that would be a guess because i could only find these recommended system requirements on one site ........................