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so choose the AMD because its slightly cheaper even though it runs much hotter, unupgradable ( AM3+ = dead ) and must be highly overclocked to even come close to matching the i3 in terms of performance ( and it still gets beat in everything that doesnt utilize more than 2 cores [ie most applications and all games])??... if he doesnt need the discrete graphics card then i would definitely recommend the AMD cheap as its IGP is much better than Intels token effort. However the i3 and 7770 is a nasty bang for buck combination. Ideally some more information is required before a "best" choice can be ascertained, however if your building from scratch and the price difference ( 20 bucks lol ) doesn't bother go get the i3/7770 hands down. .. and disregard the fanboy's advice (like esrever above me) and try to find truly objective literature based on what YOUR needs are ( can be difficult here i know)
http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-5.html
http://www.cpubenchmark.net/cpu_lookup.php?cpu=AMD+Phenom+II+X4+810
facts > heresy
the i3 >>> phenom ii x4, however as you mentioned the 5800k is a much more viable option, but as other have said if youre going to get a discrete card then grab the intel chip all day
i dont think my view is dated im just being realistic on how much you'll utilize those extra cores on a day to day basis whilst the advantages the intel chip provide are evident every time you turn your machine on
it seems you picked an older i3 version to validate your point, try doing that again with the latest ivy bridge i3
http://www.cpubenchmark.net/cpu_lookup.php?cpu=Intel+Core+i3-3220+%40+3.30GHz
either way i think we both agree the a10 is a solid option, however the i3 is still faster in programs that use 1 or 2 cores ( which regardless of where were headed, this encompasses most every day computing and most games)
http://www.tomshardware.com/reviews/gaming-fx-pentium-apu-benchmark,3120-9.html
^^ and this is based off older sandy bridge i3s like the one you listed, which Ivy bridge are much faster than ( when at stock clocks which will always be the case when an i3 is involved )