Prime 95 freezing during blend test

[Madalin_4]

Hi guys.
Here are my specs:
CPU:i7-4790k 4,0ghz
GPU:Gigabyte gtx 760 windforce 3x of edition 2gb 256 bit
RAM:hyper x red 1x8gb DDR 3 1600 mhz
PSU:ANTEC 650w 92%
HDD:500gb Caviar Blue
MOBO:gigabyte z97x-gaming 5

Here is my problem :
After 1 minute in prime 95 blend test my PC freezes completely ,can't move the mouse ,the restart button doesn't WORK,it needs to turn off by the power button and then start again.
I experience this even in games after 15-30 minutes of playing.
If I go in bios and lower my RAM frequency to 800mhz it will still freeze but in 5 minutes in prime 95 and 1-2 hours in games.
What I've tried:
-replacing RAM
-replacing HDD
-replacing thermal paste on the CPU and GPU
-replacing video card
Please help me guys.
At this moment I ask you guys ,I've searched a lot and moved between the CPU and mobo,but it could be the CPU heatsink?

 

[Madalin_4]

Ok,so what should I do now?how I can see if my Mobo it's all right and if the bios is the fault

 

[GhislainG]

Ok,so what should I do now?how I can see if my Mobo it's all right and if the bios is the fault

You have to go into the BIOS screen and reset it to the default values.

 

[Madalin_4]

Can I RMA my bios at home?or to force downgrade it or even to remove the protection that doesn't let my downgrade my bios?

 

[Sohom]

Try reseting the CMOS by pulling out the battery from the motherboard and wait for 30 secs or more and then reinsert the battery.

 

[Madalin_4]

i've tryed this.i ask you if i can force downgrade my bios?

 

[Sohom]

No, its specifically mentioned in the F6 bios update that "This BIOS prohibits updating to earlier version BIOS". You can however downgrade from F7 bios to F6 bios. But you cannot go back to the F5 bios.

 

[Madalin_4]

I've seen that many guys are forcing the bios downgrade with fpt tools.But i cannot find an fpt tool for my z97 chipset

 

[GhislainG]

Did you contact Gigabyte about the issue?

 

[Madalin_4]

ok guys,so today i got one freeze at 54 C degrees and one at 57C degrees.So i suspect is something wrong with my mobo.What do you think it is?all the mobo or the bios considering that all of these started after a bios update

 

[GhislainG]

It could be the motherboard or the CPU, but I have a hard time believing BIOS F7 causes the issue because everyone who upgraded and uses the same CPU would run into it. Personally I would consider an RMA for the CPU (easier than the motherboard), but it really is up to you. Honestly I never ran into an issue where the BIOS caused a system freeze when the CPU gets warmer.

 

[Madalin_4]

Man,I got one freeze at 54 degrees and one at 57 degrees which is a very low temp for gaming.I remember that few months ago I was getting freezes even when just staying on chrome or watching videos on YouTube which is not stressing very much my CPU,just like 43-45 degrees

 

[GhislainG]

It has to be the CPU or the motherboard; you need to swap parts to determine which one.

 

[Madalin_4]

Today I got a freeze at 41 degrees.You still think that there is a problem with my CPU?

 

[mdd1963]

I'd pretty much always lay 4-1 on the MB over the actual CPU every being at fault....maybe even higher odds, frankly.,...(barring anyone dorking up sockets with dropped screwdrivers, sideways/upsaide down attempted CPU isntall, bent pins, spilling thermal material into socket, breaking off capacitors while delidding, etc..)

 

[GhislainG]

Today I got a freeze at 41 degrees.You still think that there is a problem with my CPU?

At 41°C it less likely is the issue.

 

[Madalin_4]

so my mobo is the problem?

 

[GhislainG]

Probably.

 

[Madalin_4]

Anyone know a way to downgrade a bios?

 

[GhislainG]

Anyone know a way to downgrade a bios?

You can't and it won't help. Contact Gigabyte support to get an RMA.