Question System terrible after power supply failure

May 13, 2019
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System was running very well up until the crash. Was playing Fallout 4 and BOOM. Dead. Power supply completely died on me - no attempt to even reboot. Suspected cause - heat build up due to dust. (Multiple cats and dogs and I was remiss in my maintenance :( )

After replacing power supply, system ran like a dog. Fallout went from 60~fps to 10. Other games ran but the more they demand the worse they run. Evil Genius runs fine, but Factorio is choppy and other 3d games... yuck.

I have attempted the following:
1 - Upgrade to Windows 10 (from 7) on existing drives
2 - New SSD Drive , clean Win 10 install
3 - format new ssd, reinstall win 7
4 - ram tests - no problems found
5 - drive tests - minor issues fixed, no improvement

I'm convinced something got fried. Question is, is it CPU? GPU? Mobo? It's an older mobo so replacing it means replacing just about everything else core.

Specs and performance ratings:
Component​
Details​
Subscore​
Base score​
Processor​
Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz​
3.4
2.9
Determined by lowest subscore
Memory (RAM)​
16.0 GB​
6.4
Graphics​
NVIDIA GeForce GTX 760​
2.9
Gaming graphics​
9827 MB Total available graphics memory​
7.2
Primary hard disk​
707GB Free (954GB Total)​
7.9
Windows 7 Professional​
System​
Manufacturer​
ASUS​
Model​
All Series​
Total amount of system memory​
16.0 GB RAM​
System type​
64-bit operating system​
Number of processor cores​
4​
Storage​
Total size of hard disk(s)​
2817 GB​
Disk partition (C:)
707 GB Free (954 GB Total)​
Media drive (D:)
CD/DVD​
Disk partition (E:)
360 GB Free (931 GB Total)​
Disk partition (F:)
481 GB Free (932 GB Total)​
Media drive (H:)
CD/DVD​
Graphics​
Display adapter type​
NVIDIA GeForce GTX 760​
Total available graphics memory​
9955 MB​
Dedicated graphics memory​
2048 MB​
Dedicated system memory​
0 MB​
Shared system memory​
7907 MB​
Display adapter driver version​
26.21.14.3064​
Primary monitor resolution​
1920x1080​
DirectX version​
DirectX 10​
Network​
Network Adapter​
Realtek PCIe GBE Family Controller​


Just posting this took 25 minutes most of which was dead screen time.

Any advice/thoughts? Thank you!
EG
 

Satan-IR

Honorable
Apr 18, 2014
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A PSU failure might affect parts on other components like the motherboard and graphics cards and graphic cards are more vulnerable to those events.

If you're mainly experiencing problem in games maybe the graphics card is damaged. Can you test with another card in your system?

Also check the SMART health status of storage devices (HDDs, SSDs) with software like HD Sentinel or CrystalDiskInfo.

Also run "sfc /scannow" (wihtout quotes) from an elevated command prompt. Here's a guide on how to do it on Windows 10.
 
I would be running Hard Disk Sentinel (which I use daily on all my rigs) to check it's not a HDD dying.
The Reason HD Sentinel is good, its all in English, not just numbers on a chart and gives predictions and such as to how long your drive will last. When it gets down to 100 days or less, that's when you got to start replacing it.
 
May 13, 2019
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Posting from phone atm so will be brief.
Am on win7 at the moment.
SSD is brand new. Perfomance equally bad with old drives online or pulled.

Perfomance is bad all around. Graphic tests (DFX) ok, but network, sounds all seem affected.

I'm leaning toward the mobo right now.
 
What is the make/model of your original and replacement PSU?

A failure of a psu can damage other parts if the failing unit was a cheap unit with ought sufficient circuit protections.

Unfortunately, the main way to diagnose pc problems is by replacing parts with known good units.

If I had to guess, I would suspect the graphics card.
You could use this incident to justify a graphics card upgrade.
Perhaps to a GTX1660 class card.
 

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