Bsod windows 7, error 0x4

That is a hardware error, and the error is associated with the PCIe port to which the GPU is connected.

Code:

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*                        Bugcheck Analysis                                    *
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WHEA_UNCORRECTABLE_ERROR (124)
A fatal hardware error has occurred. Parameter 1 identifies the type of error
source that reported the error. Parameter 2 holds the address of the
WHEA_ERROR_RECORD structure that describes the error conditon.
Arguments:
Arg1: 0000000000000004, PCI Express Error
Arg2: fffffa8007b5e038, Address of the WHEA_ERROR_RECORD structure.
Arg3: 0000000000000000
Arg4: 0000000000000000

Code:

===============================================================================
Section 0     : PCI Express
-------------------------------------------------------------------------------
Descriptor    @ fffffa8007b5e0b8
Section       @ fffffa8007b5e148
Offset        : 272
Length        : 208
Flags         : 0x00000001 Primary
Severity      : Recoverable

Port Type     : Root Port
Version       : 1.1
Command/Status: 0x0010/0x0407
Device Id     :
  VenId:DevId : 8086:d138
  Class code  : 030400
  Function No : 0x00
  Device No   : 0x03
  Segment     : 0x0000
  Primary Bus : 0x00
  Second. Bus : 0x00
  Slot        : 0x0000
Dev. Serial # : 0000000000000000
Express Capability Information @ fffffa8007b5e17c
  Device Caps : 00008021 Role-Based Error Reporting: 1
  Device Ctl  : 0127 ur FE NF CE
  Dev Status  : 0002 ur fe NF ce
   Root Ctl   : 0008 fs nfs cs

Now, that Vendor ID and Device ID indicates to:

Code:

I/O-port 0x000003C0-0x000003DF    Intel(R) processor PCI Express Root Port 1 - D138
I/O-port 0x000003C0-0x000003DF    AMD Radeon HD 6370M

I dont think that your laptop, Asus K52JT has multiple PCIe ports to attach the GPU elsewhere.

So first do two tests.
First, try another AC adapter, provided the BSOD is occurring with plug on.
Second, Stress test the Graphics Card using Furmark.
Video Card - Stress Test with Furmark

If nothing is found, straight go to an ASUS repair shop, and not elsewhere (hope the warranty is over, as 3 years is about to pass; if it is not over, you are extremely lucky for this issue). Because, the PCIe port error means a motherboard issue; and usually laptops use OEM license, which is tagged with the motherboard. So best let ASUS deal with the issue.

So, i havet had time to Switch my AC adapter yet, but I ran FurMark stress test and it appears that I have got some artifacts, for short period of time which disappears almost immediatly, during the test. Does it that mean the problems are caused by my graphic card?

Artifacts are not good, for sure. But that is not enough for a stop 0x124. What happened during the test? Did it crash? What was the temps during the test?

That means the GPU is not the problem.

If the same BSODs recurs, the way would be to change the motherboard, but from ASUS's place only,not elsewhere.

Yes, go for it.

Code:

BugCheck A, {0, 2, 0, fffff80002c94e52}

Probably caused by : dxgmms1.sys ( dxgmms1!VidMmiProcessTerminationCommand+5f )

Followup: MachineOwner
---------

2: kd> lmvm atikmpag
start             end                 module name
fffff880`04722000 fffff880`0476c000   atikmpag   (deferred)             
    Image path: \SystemRoot\system32\DRIVERS\atikmpag.sys
    Image name: atikmpag.sys
    Timestamp:        Thu Aug 12 06:41:05 2010 (4C634A29)
    CheckSum:         00045652
    ImageSize:        0004A000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Can you update the display driver? It is too old.