sincreator :
a single core sempron at only 2ghz right?
how do you now his current processor is sempron with exact 2ghz clock speed..?
well, he's ask the best, then we give the best..
but yes, 7850 will need a decent psu..that's means new psu for him..and this one causing more budget..
i think it's better buying a strong gpu (and also decent psu) right now, rather than buy a $30-$40 weak card, and at the time comes, he need to buy a gpu once more again..