Random shut downs after CPU and Bios Upgrade

[TylerMH1996]

Specs

Base Computer

Dell Optiplex 755mt

Mother Board

Intel Q35 Express

Processor Socket

LGA775 Socket

Upgrades

BIOS Version

A22

CPU

Intel q9650 / 3GHz (No Overclock, yet?)

RAM

4 x 2GB: Samsung 2GB 4GB 8GB DDR2 800MHz PC2-6400U DIMM

GPU

MSI GT 710 1gb DDR3 Low Profile

Hard drive 

Seagate FireCuda 1000GB Internal 3.5" (ST1000DX002) SSHD (Solid State Hybrid)

Powersupply

Corsair CX500 80 Plus Bronze Active PFC ATX12V & EPS12V

CPU Heat Sink

Dell Optiplex Heat Sink D9729 0D9729

CPU Thermal Paste

Coollaboratory Liquid Pro

Extra Cooling

80mm fan, 30mm fan, stock CPU fan

Operating System

Windows 10 Home 64-bit

Problem

As far as I can tell the shut downs are completely random. As long as I don't run any applications it will stay on. Once I open an application like chrome to watch a YouTube video there's a chance that a shut down and reboot will happen, but it doesn't always happen -i.e. completely random. When it does shut down it resembles unplugging the power cable while the computer is still on. 

 

This started after I replaced the CPU, RAM, and upgraded the BIOS. It's not a power supply issue because I have tried fixing it with 2 different power supplies now; the base 305W PSU and the Corsair 500W PSU. I have download both CPUID and Core Temp to see how the CPU is holding up and it appears to be doing alright running at between 35C normal load and 55C under heavier load.

 

At this point I don't know what to try next. I've read that the CPU and Mother board should run fine with the A22 BIOS so I don't know if a down grade to A21 BIOS is warranted. Also, I've never done a downgrade on a BIOS before so I don't know if downgrades screw with other drivers and if I need to do a clean install of Windows. If any one has any suggestions they would be greatly appreciated. I would like to try everything possible before I go buy a new Q9650. I understand that it would have been easier to buy a new computer but this was about the learning experience  which has been amazing so far.

 

If you need any other information, feel free to ask.

 

Thanks in advance!

 

[Astarore]

Sounds like it could perhaps be a ram issue if it only happens once you stress the ram with running applications.Especially with Chrome which is known to be quite ram hungry

[TylerMH1996]

17 minutes ago, Astarore said:

Sounds like it could perhaps be a ram issue if it only happens once you stress the ram with running applications.Especially with Chrome which is known to be quite ram hungry

There were two things I was hoping no one would suggest, CPU and RAM. But I'm thinking you're right. I'll let ya know how swapping the ram goes. Thanks for the suggestion m8.

[TylerMH1996]

On 8/22/2018 at 8:46 PM, Astarore said:

Sounds like it could perhaps be a ram issue if it only happens once you stress the ram with running applications.Especially with Chrome which is known to be quite ram hungry

Night one with new RAM and no reboots. <3 we'll give it a week. Thank you if this works.

[TylerMH1996]

On 8/22/2018 at 9:05 PM, TylerMH1996 said:

There were two things I was hoping no one would suggest, CPU and RAM. But I'm thinking you're right. I'll let ya know how swapping the ram goes. Thanks for the suggestion m8.

We got a reboot :'-(

[TylerMH1996]

On 8/22/2018 at 8:46 PM, Astarore said:

Sounds like it could perhaps be a ram issue if it only happens once you stress the ram with running applications.Especially with Chrome which is known to be quite ram hungry

Was a RAM voltage issue. You were right. GG