if i were to build a computer with the following specs,which PSU would i need and what model do you guys recommend
Gigabyte AMD Radeon HD 7870
Intel Core i5-3550
WD black 1tb
Antec Three Hundred ATX Mid Tower
The first thing to ask, is are you intending to use TWO graphics cards? If you are, then obviously a high rated PSU will be required. If not, then there is no point to using a Z77 motherboard, with a locked processor. If you only intend one GPU and want to use a locked processor, then use a lower cost H77 mobo.
If you want to use Z77, get an unlocked i5-3570K, to at least, give yourself the option of overclocking, in the future, even if you don't necessarily want to now.
Having said that, with a locked processor, and SINGLE HD7870, 500w or slightly above is adequate. It depends, of course, where you are, but the XFX 550w is a good PSU, and normally competatively priced. 550w gives scope for GPU overclocking, and modest additions/upgrades. If you want scope for adding 2nd GPU, you really want 750w. At that rating, there are lots of decent choices; XFX again, Corsair, PC Power&Cooling, Antec, Seasonic.
i think im gonna ditch intel and change the processor to amd fx-8320,yes i will overclock the cpu and no i wont crossfire,if so what mobo would be best, i'd like the least price possible since im on a tight budget,also when i read reviews of components i always find that lots of people recieve so called "lemons"should i worried about this??
Yes, point is, if OP is changing because, in addition to gaming, he's also doing a lot of video editing, then the choice between i5, and Piledriver is close. On the other hand, if he's deciding on price, there isn't much difference; if he can use Microcenter's deal i5 actually cheaper. Hopefully it's not on the basis of "I can get 8 cores, for the price of 4, with AMD". Piledriver may not be far behind i5, for gaming, but it is still behind.
Too bad I'm not in the US so no newegg or microcenter for me. The retailers over here charge way too much so i was thinking amazon would be good,and $169 is a darn good deal for a 3570k but it seems like i'll have to go with $219 at amazon. i will be doing gaming mostly and about the ram, 8gb will be more than enough right
Amazon is often as cheap as anywhere. If purchasing through Amazon Marketplace, it is wise to check the reputation of the company that's ACTUALLY selling the item. If "partpicker" operates in your country, that will suggest the cheapest supplier, for each component, although, if there is one supplier, with a good range of stock, there are advantages, to getting everything from one source, even if not the absolute cheapest, for each component.
Yes 8GB of RAM is more than enough for gaming, most games don't actually use more than about 2GB.