E2160 oc`ed vs 5200x2

i am trying to build a budget gaming rig .. and damn its pretty hard...
the components i have in mind are:
mb:gigabyte p31-ds3l/asus mn2-e-sli
ram:corsair xms2 pc6400 cl5 2x1gb
hdd:WD400gb sata 2 16 mb buffer
DVDRW:asus retail
Case:Raidmax Sagitta black
PSU:sirtec hpc 460w or ASUS 450w or
graphix card:gigabyte turbo zalman cooled 8800GT 512mb
processor E2160 @3.2 on stock cooler/5200x2 @stock

TOTAL=865$ on intel platform and 950$ on amd platform ... (dont ask why so expensive .. i live in romania , here anything is possible)

i was wondering if you could help clarify the performance difference that will be between the E2160oc`ed and the 5200+
is it going to be significant or is it going to be un noticed?
are any of the cpu's going to bottleneck my videocard?
is the sistem going to be able to run crysis all on high on 1024/1280?
and most important .. is it going to start with one of those psu's?

well thats the thing .. i have to build a custom pc budget 900$.
if i had money i probabily would buy a 600w psu just to make sure it would run fine .. but i dont
and the 460w psu costs about 80$ cand a 500 brand psu around 130$
thats why i realy need to know if the sirtec 460w will run my sistem ... anyone with knowledge on this remark please reply.

yea its nice but it costs like 200$ here... my budget is only 80$ for a psu. wwww.pcgarage.ro check it out

Dont worry about the max watt-use, the system you have described will draw a max of about 270 watts, if not less. You can see tests around on similar systems where this is the case.
People tend to vastly overdo the powersupply.

It is though important that the PSU you buy is a quality one so that it's stable on the volt-lines and also effective and durable.

I would go for the 1,6 duo also, though a 3,2 overclock is optimistic. I'm not too worried for the CPU or cooling, but I believe your motherboard will have trouble handling the FSB needed. 2,7 would be a safe bet for a stable system likely even without having to raise the voltage for your CPU.

Also in games tests show difference between 2,7 and 3,2 is very small since and such cpu-hungry games, the smalle cache of the 1,6 duo seems to be the bottleneck. Still an extremely good cpu for the budget buyer :-)

I am putting a similar system together with this PSU. http://www.newegg.com/Product/Prod [...] 6817371007

I don't think I would need more unless I was running two GPUs.

for e2160 ddr2 800 is not necessary, dr2 667 is good enough.