No dmp file created when crashing ???

I don't get any blue screen ...... Just hard lock up freeze ... no mouse or keyboard reaction ... I have then to reset or hold power button.

It will only be creating .dmp files if there is a blue screen.

Well ... how can I know wth is going wrong with my machine then ???
On evga forums they saying this motherboard could be the issue ( evga 790i ultra sli ) cause it's very capricious about the ram you run it with but beside that I changed the video card already ( had nvidia 9800 and now ati 4850 so can't be that ) which would leave me with only cpu or hdd ( checked with western digital tools and nothing wrong with my raptor 300 gbs ) or eventually faulty motherboard ... if it was hardware caused.
Temps never go over 60 celsius on any part so I'd say can't be overheating either.

I would test all of your hardware and make sure all of them are not faulty.

RAM: RAM - Test with Memtest86+
- Run at least 7 passes (this will take 6-8 hours)
- Do this overnight
- Burn .iso to CD/DVD using a CD burning program (Imgburn is recommended)
- Just remember, any time Memtest reports errors, it can be either bad RAM or a bad motherboard slot. Test the sticks individually, and if you find a good one, test it in all slots.

CPU: https://www.sevenforums.com/tutorials...t-prime95.html
- Run Prime95, use the tourture test, Blend. This will test CPU and RAM.

HDD: | Seagate

I did try memtest a long while ago and let it run for 5 hours + no error ... One thing though if I remember right it had frozen during one of them memtest .... No error on the error count though.
I did prime95 and intelburn to test my cpu and never had any error there either.
Hdd tested with western digital ( tried seagate thing but wouldn't show my hdd on there for some reason ) and no error showed either.
I don't have any other motherboard handy to test though

Do the memtest and give at least 7 passes.

Did a memtest while I was gone and came back to 5th pass no error ... but comp had frozen hehe Does that mean it could be bad ram or ???

Are you overclocking anything? Can you check your computer for a while if it is overheating? And can you blow out the dust in the heatsink?

Maybe take some photos inside your computer?

I'm 100% positive it's not overheating ...
Using everest ultimate and NOT ONE temperature over 60 celsius ever ... Even while using 100% cpu and stuff with stress tests / gaming or what not.
( cpu max at 59 celsius , both cores , spp max around 53 celsius , mcp max around 58 / 59 celsius , gpu ( depending on it being displayIO / memIO or shader ) range from 48 celsius to 56 celsius and hdd max around 27 celsius so ....
But yeah I repeat my question ... Could freeze during a memtest just be ram's fault or more likely not hardware ??? Or maybe no way to figure it out ???
I have bought this comp to a friend who shipped it over seas ... And it hasn't worked for more than 9 days straight without a freeze ever ... I could have shipped it back but it cost me more in shipping than it actual cost me buying it off him so I kept it and trying to figure out what's wrong with it.

Bump!!!