@Sam :- won't the Athlon X4 be better at gaming and multitasking ? But your suggestion includes 5770 which is a great graphics solution.
X3 is best suited for gaming. fast speed. 3 cores. X4 is like an extra pair of hands but at the expense of speed. so gaming which needs speed takes a minor hit. OC solves it.
but on the other hand X3 got some unique properties too: 4th core can be unlocked (luckily), current games use 2 cores. 1 extra core= gaming + multitasking allrounder. as 3cores, generate less heat. so OC potential is 3.5Ghz @ stock cooler.
One more thing, how much will i hve to spend more to go for x4 processors and wat is the basic difference between phenom and athlon processors of amd?
by X4 620 currently available for 4.4-4.5k. but its a 2.6Ghz part. so, at stock speed gaming will be better at a 2.9Ghz tri-core. go X4 only if u ready to OC. also multitasking is better on a X4. so decide accordingly.
Phenom II got L3 cache (6Mb). some games use it but not all. for gaming, better opt for a fast graphics card rather than trying involve a X4 or a Phenom II. cause with a HD5770, you'll get almost same result with a 2.8Ghz X4, 2.9Ghz X3 or 3Ghz Z2 (Athlon II or Phenom II), provided your system backed by 2-4Gb of ram.
Nd yeah m sure i won't be able to find NZXT Gamma here in lucknow. not much of gaming market here

. So if you can suggest something in coolermaster or iball(lol) thn it wud b better for me...
if you want a big cabinet but not want spend a lot, Zebronics Reaper @ 19" tall will solve all your cabinet problem upto an extend. for Cooler master look out for Elite 310 for style or other Elites for proper ventilation. seriously no to iBall.
Man i can spend 2-3+ bucks bt i will never take risk wit PSU...one of my gts 250 blew up coz of sucky PSU...been a little cautious after that lol
FSP Saga II 400W or Gigabyte 460W, both will be able support your rig. 500W if you got some future upgrades in your mind. also GTS250 is a power hungry card, running it in a desi PSU will result nothing but in an explosion. however i doubt Frontech or iBall PSU got enough muscle to make a sound before going off
@rohit :- CoolerMaster Elite 360 for 2k would be good. The cheapest Phenom II X4 I have come across is the Phenom II X4 925 which costs 6.8-7.2k.
Elite 360 is too small. not by length or so. actually it falls in miniATX section. can't end accommodate a ATX motherboard well. with a HD5770, better consider something
BIG.
925 is slow. 2.8Ghz. that also selling out 7k, a no go when gaming is on the list of uses.