Computer disfunctioning driving me insane

[RoiMan]

A mounth or so ago we've bought some new components for our beat up computer and replaced most of the stuff.
Ever since, games are crashing, blue screens strike like there's no tomorrow, the computer is shutting down with no warning..

Processor is i7 3770K
Graphics is GTX 660 Ti
16 gigs of RAM
Windows 7 64bit
Motherboard is P8Z77-M

I have tried in countless forums and communities to figure out what's wrong..
Some games crash with the note "~game~ has encountered a problem and has to be shut down" or "Windows has encountered a problem with ~game~"
and trying to search for solutions.. some just crash to desktop without warning.

I've recovered a blue screen says : "DRIVER_IRQL_LESS_OR_EQUAL"
and obviously it's drivers related [ GENIUS ]

and local information says something started with this

TOP: 0x00000001 (0xFFRFFFFFFRFDG610,0x0000000000000002 .... etc.

I have no clue what all of these mean.. help?

[Calum]

First things first, download Memtest86+ and let it run preferably overnight to test your RAM, to see if that's at fault.  DRIVER_IRQL_LESS_OR_EQUAL is often caused by bad memory.
Let us know how the test goes and we'll go from there.
Additionally, what make and model of PSU do you have?  Also, did you do a fresh install of Windows when you replaced those components?

[RoiMan]

First things first, download Memtest86+ and let it run preferably overnight to test your RAM, to see if that's at fault.  DRIVER_IRQL_LESS_OR_EQUAL is often caused by bad memory.
Let us know how the test goes and we'll go from there.
Additionally, what make and model of PSU do you have?  Also, did you do a fresh install of Windows when you replaced those components?

I didn't really understand how this Memtest thing runs. As I said, I'm a starter.. I've burned it on a disk, re-inserted and got nothing.. tried booting, got a security notification. Is there a simpler way?
PSU is some no-name product, probably from China. Though, it was tested and is O.K for use. It's 500W.

It's not only Blue screens, It's just shutting down, quits randomly, Crashed by Windows 7..
We have put together the Motherboard, memory and processor on XP, then upgraded to Windows 7 and then added the graphics card.

[patio]

It's the PSU...replace it.

[RoiMan]

It's the PSU...replace it.

Are you 100% sure? where's the problem? not enough power?
Have a recommendation for a good PSU in a fair price?

[Chrisxs5]

First things first, download Memtest86+ and let it run preferably overnight to test your RAM, to see if that's at fault.  DRIVER_IRQL_LESS_OR_EQUAL is often caused by bad memory.
Let us know how the test goes and we'll go from there.
Additionally, what make and model of PSU do you have?  Also, did you do a fresh install of Windows when you replaced those components?

I would start here as well. You might need to check the Bios for boot order to ensure it will come up. Memtest also released USB boot version. Also make sure your memory is compliant with your motherboard. Here is your mem spec for yours:

4 x DIMM, Max. 32GB, DDR3 2400(O.C.)/2200(O.C.)/2133(O.C.)/2000(O.C.)/1866(O.C.)/1800(O.C.)/1600/1333 MHz Non-ECC, Un-buffered

To see what you have installed now, you can go to Crucial.com and run there scan software.

[patio]

My 1st clue...

       

PSU is some no-name product, probably from China.

You can alternatively borrow a known good one of a bit higher wattage and swap it in overnite to test this theory however...

[RoiMan]

My 1st clue...

       
You can alternatively borrow a known good one of a bit higher wattage and swap it in overnite to test this theory however...

Perhaps.. though it was tested and determined 100% functioning..

On the memory scan.. so I burn it on a CD, boot the computer with the disk and then what? where will the results be? how do I know something's wrong?

[Chrisxs5]

Here is really nice presentation that should just about take you from start to finish:
http://www2.corsair.com/training/how_to_memtest/

[patio]

Perhaps.. though it was tested and determined 100% functioning..

Tested how exactly ? ?

[RoiMan]

Tested how exactly ? ?

Power supply checker.

[Geek-9pm]

Pardon me again. 
I was a super tech in  Silicon gulch and a Certified Electronic Technician for many years. Blah, blah, blah.  I know what I am talking about.
The power supply testers advertised on poplar places are not suitable for really doing analytic measures of power supply issues.

Direct substitution is the  way for a home or small business to prove a power supply.Otherwise rReal testing requires lavatory grade equipment the costs more that three power supplies. Moral: keep at least one new PSU on hand if you do your own troubleshooting.

[patio]

Replace the PSU...
Last time i'll suggest it.
Don't get a $39.00 unit this time

[RoiMan]

Replace the PSU...
Last time i'll suggest it.
Don't get a $39.00 unit this time

Sorry master. I'll not doubt you again. Got a good advice on a good, fair price PSU? I quess my abomination of a PSU won't do.
And thanks. Thanks alot too, Geek. And Chris.

[Calum]

Sorry master. I'll not doubt you again. Got a good advice on a good, fair price PSU? I quess my abomination of a PSU won't do.
And thanks. Thanks alot too, Geek. And Chris.

Not sure if you're saying that jokingly or not, but an off brand (low quality) PSU can be the root cause of many issues, even if they're seemingly unrelated.  Even if it appears to work fine, the voltage can easily go out of spec especially when loaded up, and this can damage hardware over time.  They can even explode or set on fire.  I'm not saying buying a known good quality unit means it will run forever and never die, but I am saying there's no point scrimping on the power supply of all things.

What do you define as a good, fair price PSU?  XFX and Antec make a lot of good quality units at reasonable prices.  Corsair make some "OK" and some very good units, but you often pay more for the name.  Seasonic make excellent units and in fact actually make all of XFX's units, some of Antec and Corsair's, and many more, but again they tend to be priced higher.  There are a lot of good units and a lot of bad ones, if you give us a rough price range we can certainly recommend a good one.