@outlander_04:
after reading comments from c.a.l.f.s, i decided to search newegg for a similarly priced amd rig. here's what i came up with:
amd fx 6300 - $140
G.SKILL Ripjaws X Series 4GB (2 x 2GB) Model F3-12800CL9D-4GBXL - $30
ASRock 970 EXTREME3 AM3+ AMD 970 - $85 ($10 instant discount)
cm hyper 212 evo - $33 ($5 instant)
PowerColor PCS+ AX7870 2GBD5-2DHPPV3E Radeon HD 7870 MYST. Edition (Tahiti LE) - $240
corsair cx 600 v2 - $70 ($10 instant)
Corsair Carbide Series 200R - $60
seagate hdd barracuda 500 gb - $60
odd - $17-20
total - $700+
now, i chose 200r(highly subjective choice) because the powerhogs need good airflow and support for coolers to dissipate heat. you can choose a cheaper case but i think it'll still break budget. [strike]xig. asgard ii's specs say that it only has one exhaust fan and supports coolers with height less than 150mm.[/strike] edit: after re-checking, i cannot verify if cm hyper 212 evo would fit in the xig. asgard ii case or not. the width measurements say it should, but the website says that the case supports 150mm coolers. may be a clc like corsair h55/60 would fit....
😀
i would not use a cx430 with fx and tahiti. that's reckless and stupid. cx600 v2 is still not a good choice though, corsair upgraded that line with new psus afaik.
mobo is as cheap as the one in intel build. refutes the amd-favoring argument that amd boards offer much more. that's no longer true.
the powercolor myst card is out of stock at newegg. since you incessantly insisted on a 7870xt, so i added with it's listed price. going down to a 7870 or a 7850 will only make the current sbm i5 build look better.

ram is underspecced for fx, i did that to save money. fx supports ddr3 1866 while ivb supports 1600, still broke budget limit.
if you want to stay within limit, drop the cooler, get a cheaper, low watt psu (and take chance with reliability), get a worse case (and take chance with heat dissipation, stability, fitment and so on) - All tradeoffs.
if i've read the article right, this quarter's sbm's point was to Not
drop 1080p gaming performance, instead
add application performance to fight for best-bang-for-bucks crown.
if you'd actually read (you've repeatedly proved that you didn't or didn't understand those) some of the sbm articles, you'd know that games add only 30% of scores (60% in apps, 10% hdd perf) to the final tally. non gaming apps add majority amount of points to the final score. past $500 builds would underperform in apps but score high in games. this time, with added budget and a slightly different target, there was a chance to increase scores in the 60% apps performance without dropping 30% score in gaming. and this build successfully achieved that compared to previous quarter's build.
to summarize - they didn't drop 30% gaming score, instead aimed for raising the 60% app score. an fx 6300 or 4300 or core i3 wouldn't do that without trade offs.
here are the weaknesses of your fx6300 combo-
fx6300 is a 95w cpu, at stock settings. overclocked, it sucks power as much as it's octo-hog siblings.
7870xt is a 200w card, at stock settings.
corsair cx430 (not the v2 one?
😀) psu.
amd 970 chipset motherboard.
the necessity of overclocking.
when you put them in a cheap case (no intake fan, yay!) with your 430w corsair psu, it'll leave almost no headroom for overclocking. amd motherboards usually suck more power on load than intel ones.
if you do consider overclocking, both fx and tahiti le gpu are huge powerhogs. there's no getting around that. those will dissipate huge amount of heat for the barely comparable performance that the intel build offers. the stock fx6300 will bottleneck the 7870xt in games like f1 (uses same engine as amd sponsored dirt games), let alone skyrim. far cry won't be that different either.
application performance difference would be closer than you think. if you look at last quarter's $1000 amd build and this q's $800 intel build, the i5 3570k easily keeps up with fx8350 in apps, especially with overclock. in gaming benches, the fx8350 bottlenecked the gtx670 to cases where the 3570k+ 7870xt could catch up and in other cases, come within a few fps.
wait.... your fx6300+970 mobo+7870xt+corsair cx430 combo doesn't allow for high oc, it doesn't even add a cpu cooler! but the i5(in current sbm build) can be partially overclocked(with intel stock cooler as it's rated for 77w or may be the older 95w tdp) as well as allow the 7870xt be overclocked.
😀
you're also missing a decent cpu cooler for your fx6300. cooling a 69w cpu and a 95+ watt powerhog(far worse when overclocked) are two different endeavors.
also missing is a decent case with good airflow to exhaust all the hot air these hot messes will heat up.
like the others said, put together a full configuration instead of whining about components, staying within the budget limit. it will be a fascinating journey for you.

my journey was predictable and underwhelming.
amd's oh-so-admired 'killer performance per dollar' advantage(!) fizzles when you compare build against build within a budget. i am not undermining piledriver fx. those offer good upgrades for existing amd owners and people who are willing to compromise.