Windows 7: super slow windows, on very decent pc

ok so first off here is my computer specs



mobo asus p8 z77-v LX
intel i5-3570k quad core cpu
16 GB ram ( 2 set of 2 4gb sticks )
Windows 7 64bit
ati hd 5450

i started without the ssd nor the gpu, preformance all around windows was laggy
about each window has to hang a bit

i thought it was a hdd problem so i got an ssd, no use
i thought it was a ram problem so i ran memtest86, everything is fine
i thought i had the cpu intalled in correctly, was fine aswell

what might be causing this ? i am going crazy over here ?!
can it be the mobo chipset ?

It could be a faulty installation. Did you do a fresh install when you moved over to the SSD? Otherwise it might be a driver issue, or you might have some faulty hardware somewhere.

3 times with Windows 7 ( 2 on hdd and 1 on ssd )
and 2 win8 attempts

what faulty hardware might it be ? i tested everything, and replaced everything that cannot be tested

You have an integrated graphics processor. Try rebooting with your ATI GPU outside of the machine, running your graphics from the integrated GPU.

i just bought the gpu today...
it was my finale attempt to fix the problem myself

And you did a prolonged Memtest86+ test for at least 24hrs without a single error?

Interesting. Definitely faulty hardware. You'll have to unplug everything and bring the system down to its smallest operating factor.

i allowed to to go for 6 hours only, but didnt have a single error and i tryed with both sets individually and the error lasted

ffs even chrome is lagging on a 16gb system....

is there any way to test the mobo ? it hard to find a test mobo with 3rd gen intel icore support

Take the system down to the lowest factor. Remove everything from the system that isn't required to boot and operate at the bare essential level.

at first, what do u expect of the speed ? how laggy it is??

second try msconfig and disable unwanted program from the startup