Recent GPU Upgrade causing PC crashes.

[ChocChipCookiee]

Hello THW,

This is my first ever post so forgive me if it's not in the right category.

My Problem is that my PC now crashes when I run games.
I recently upgraded my GPU (from an Nvidia GT 630 to an Nvidia GTX 970, big upgrade i know), anyway I didn't bother uninstalling any of my old drivers as I thought it was unnecessary due to both being Nvidia. I also upgraded from a 500W to a 550W just to be certain. Whenever I run any game (League of Legends and Assassins Creed) my PC just shuts down.

I've checked forums and not found anything too specific to my problem, I have reinstalled drivers but this didn't seem to change anything, the only option I seem to hear recurring is that cheap PSU's tend to not emit a constant power.

My Rig:
Intel i7 4790k @ 4.00GHz
Gigabyte GTX 970
8GB DDR3 RAM
Gigabyte H81M-DV2 Motherboard
Xenta 550w Power Supply

I recently updated my BIOS when i got a new processor (November) so that couldn't be an issue. I am about to buy a new PSU as I think this is the problem but if anyone has anything they can recommended I would really appreciate the help. This is my first build so my knowledge is very limited and has mostly come from forums and experience.

If I do get a new PSU, will a Corsair 650w be sufficient? http://www.amazon.co.uk/Corsair-CP-9020077-UK-Builder-Series-Semi-Modular/dp/B00GN8VZ7U/ref=sr_1_1?ie=UTF8&qid=1424538684&sr=8-1&keywords=corsair+650w

Thank you everyone!

 

[davidarad02]

update the drivers anyway, as the GT 630 and the GTX 970 are VERY different, and require different drivers.

 

[geofelt]

I would expect a GTX970 to run fine on a 550w psu.
But, Xenta is not a brand known to me; it sounds like a cheap unit that may be delivering it's watts on other than the +12v rails where the GTX970 needs it.
Your psu should say 45a or so for +12v if it is of good quality.
And, the CS corsair series are also mediocre.
Buy a tier 1 or two ynit from this list:
Seasonic, XFX, Antec are good for starters.
https://community.newegg.com/eggxpert/computer_hardware/f/135081/t/45344.aspx?Redirected=true

 

[ChocChipCookiee]

update the drivers anyway, as the GT 630 and the GTX 970 are VERY different, and require different drivers.

Like I said, I have reinstalled new drivers multiple times, both from Nvidia's website and the disk that came with my new GPU

 

[ChocChipCookiee]

I would expect a GTX970 to run fine on a 550w psu.
But, Xenta is not a brand known to me; it sounds like a cheap unit that may be delivering it's watts on other than the +12v rails where the GTX970 needs it.
Your psu should say 45a or so for +12v if it is of good quality.
And, the CS corsair series are also mediocre.
Buy a tier 1 or two ynit from this list:
Seasonic, XFX, Antec are good for starters.
https://community.newegg.com/eggxpert/computer_hardware/f/135081/t/45344.aspx?Redirected=true

Thank you, the Xenta PSU was given to me free as i have no money with the new gpu upgrade (i'm a teenager with no job) and I know very little about Power Supplies. I've never done electronics at school

 

[geofelt]

The main thing to know about power supplies is to use only a quality unit.

A cheap psu will not have the protective circuitry to keep from damaging all your parts if it fails under load.
A cheap psu can become very expensive.