Motherboard Faulty HOW?

From past few months i was having constant BSOD and Crashes and i don't understand the problem
first i expected memory always but i changed memory 3 times and now got Dominator series memory which are believed to be very stable
But then problem was not solved but reduced a little still getting BSOD's

Then i suspected my graphic Card but when i ran only graphic Card tests not using RAM
results were very fine and no BSOD or crash

Then i suspected CPU or Power Supply but when i ran Prime test only for cpu it passed
and Power Supply voltages were very good

Temps on test are also good enough

but when i ran full memory Prime 95 test it crashes

Now i suspected motherboard
So i put ram in each slot 1 by 1 and ran occt power supply test it crashed on two of the slots
but other two were fine no BSOD on them
and then i put second RAM now it too worked on those two slots and finally i put 2 rams in those 2 working slots but that way i can't use Dual channel since 2 working slots are of different channel
But system is very much stable on OCCT powersupply test and Prime95 test

So, thus this means my motherboard is faulty or maybe its ram slots are faulty since everything else is running fine

So what can i do to replace it its under warranty from ASUS...

My system Conf.:
Nothing is overclocked and all with standard cooler and heat sinks

CPU-AMD Phenom II x6 1090T
GPU-Nvidia GTX 470
Motherboard-Asus M4A88TDV-EVO usb3
RAM-Corsair Dominator 1600MHZ 6gb
SMPS-Cooler Master GX 750W
Chassis - Cooler Master HAF 932
Screen-LG e2360V

Windows 7 x64

yes i have checked logs,event viewer and installed windbg and used bluescreenviewer to see what's causing the problem but none use as it always gives diff. BSOD and blamed ntoskernel.exe which is main operating system kernel part and none other application was there so i read everywhere and ultimately reached a point its a hardware error