Pc acting weird, random reboots high temps suddenly?

delrocks22

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Mar 10, 2015
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System specs:
CorsairVS450 PSU
Sapphire HD 7770 GPU
Intel core 2 duo E8400 3ghz CPU stock cooler
Clean installation of Windows 7 x64
Gigabyte GA g41m combo

Recently i got my mobo replaced bcoz of random reboot problem, my problem was fixed but for like 2 days and now its acting weird again, random idle reboots again, rare - none reboots while ingame/furmark. And while playing sniper elite V2 intro just after reaching an exact checkpoint my system reboots...everytime i try to clear it..

One more problem is added now by getting this new mobo, temps of CPU reach 85-90 while stresstesting it with prime95/intel burn test ( stopped both after temp reached 90) and No, system never rebooted during one of these tests...even with 90 temp and ingame max temps of cpu on load are 79-80-81 max and completely "random reboots", not bcoz of overheating...Sniper elite v2 old game doesnt even take full load still it reboots at exact place again and again

With old mobo temps were 79 max on prime95 for cpu and mobo TMPIN2 was 40-50 with prime95
now with prime95 it shows 87 ***** http://prntscr.com/7yvkdb ******

I dont think its the GPU bcoz i tried my old gpu + onboard gpu with old mobo and it was still rebooting when IDLE

Dont think its the PSU bcoz seen many reviews and gamers with better systems and same PSU and GPU as mine..unless its defective(only 4 months old)

No overclocking done,thermal paste applied, didnt fiddle with BIOS settings since i got the mobo.

Have latest drivers...
Im at wits end i dunno what to do next, we tried to troubleshoot it in the previous thread, i showed it to the shop, they said its the mobo, i got it replaced through warranty, it worked well 2 days and now again weird problems -_-
Can anyone help me???
 
Solution
The max temperature for your CPU according to intel is 72.4C, so most of your problems could actually come from overheating. I would replace that stock cooler or at least make sure there is a decent airflow in your case to drop those temps.
You should also try running a mem test to check if your RAM is working properly.

drixkarasu

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May 13, 2015
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The max temperature for your CPU according to intel is 72.4C, so most of your problems could actually come from overheating. I would replace that stock cooler or at least make sure there is a decent airflow in your case to drop those temps.
You should also try running a mem test to check if your RAM is working properly.
 
Solution

delrocks22

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Mar 10, 2015
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The overheating is fixed..i found my old CPU intel celeron 450's heatsink fan..when i got my new cpu i thought the stock fan that came with it is new and will work better so had replaced the old one...but today tried the old one it has a bigger heatsink and bigger fan + the fan speed is awesome...my temps on idle are like 30-40 and on 100% load 60...its just abit loud on load but doesnt matter
 

delrocks22

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Mar 10, 2015
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Need a blank cd to burn the memtest, will do it tomorrow..
However, the restarting didnt get fixed...its better than before (old mobo, stock fan)...now theres rare-random reboots..its good but i cant let that happen ingame bcoz of save games getting corrupted etc...now im facing it only in fallout 3 or random games idk..sniper elite v2 reboot at exact point got proper..after the different fan..maybe just a coincidence.
Also there were no idle reboots in the past 24 hrs, and i ran furmark + prime95 once after fan change and sadly it rebooted.
Theres no way i can trigger these reboots..they are completely freaking random..i just want it fixed.......and the load on GPU and CPU isnt high when these reboots occur, completely random again..
Any solutions for this??