As for attaching the connector, it's nothing to worry about - just a socket at the top rear (or rear top) of the card (i.e. the farthest from your mobo ports for network, speakers etc). If you forget to plug it in, system will just beep at you - no harm done. Just switch off and plug it in :-)
Yeah - sounds like you will have no problem. Just pull that card out of the mobo (look for a catch on the PCIe slot if it doesn't want to come out), pull the power connector out of your NVidia, put the new card into the slot, and plug the power connector into the socket on the new card. Even without a driver, the computer will still display Windows using a generic VGA driver (until you install AMD Catalyst).
My PSU is an Aywun a1-5000.
It's crap, I know. But I built this computer on an extremely tight budget (I was 14).
Hi Sapphire recommends 500w (which means you prob can get by w 400w), but I
think you are gambling with that particular PSU, and should look to get a
500-550w quality (antec-coraisr-seasonic-XFX-enermax to name a few)
So there's no way I could run the card?
I don't have the money for a new psu.
The 7850 only uses 24 more watts than my current GPU.
Hi blahball - True - it's a low end psu. There are a lot of forums on this, JUst google it and read some of em.
I've been unable to find a lab review on it.
The best advice I can give you, since it is supposed to be a a 500w(which is more than enough)
unit, is try the 7850 with it, as long as it has the correct connector,if it's insufficient you'll know pretty quickly.
Are there any other GPU's you could recommend that would be more suited to my crappy PSU but have comparable performance to the 7850?
Hi again - both the 7770 & 7750 draw less power, but the 7850 is a big jump in performance and
does not draw a lot of power for it's performance. Your PSU doesn't have to
deliver 500w for you to run that card(prob needs 350-375w), so I'd lean towards staying with the 7850,
and start saving to upgrade your psu. The one you have should get you at least a few month's
with that card.