GTX 970 SLI Power Supply

[Arvs]

Hey guys!
I've been having some issues like crashing or freezing with high stress moments in new games.
After doing lots of testing, I've narrowed it down to the problem being what I think is my PSU: (https://pcpartpicker.com/part/corsair-power-supply-cx750m)

I'm currently running and SLI setup with GTX970 x2 (https://pcpartpicker.com/part/msi-video-card-gtx970gaming4g)

Processor: i7-4970k 4.0GHz Intel (https://pcpartpicker.com/part/intel-cpu-bx80646i74790k)
Case: Cooler Master Storm Stryker (White) ATX Full Tower Case (https://pcpartpicker.com/part/cooler-master-case-sgc5000wkwn1)
Motherboard: Z97 Pro Gamer (https://pcpartpicker.com/part/asus-motherboard-z97progamer)
Memory: SSD- Samsung 840 EVO 250GB 2.5" Solid State Drive
HDD- Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
RAM- G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory

What would you recommend as better PSU for this setup?
And, I would also love to hear any ideas as far what else the issue could be when I crash. (I did disable my SLI setup and crashed again, but this issue never occurred until after I setup the SLI config)
Thanks!

 

[rcald2000]

I'm honestly not sure if the problem is your power supply. Corsair CX units get a very bad rap around this site, but normal recommendation is a 700 watt tier 1 or 2 PSU. Yours is 750 watts, but is tier 4. Before you consider swapping it out, would you mind doing the following:

Uninstall the GPU drivers with DDU -> reboot computer -> download and install drivers only from Nvidia (don't install Geforce Experience for now) -> Reboot. Any change?

I've heard of people having problem when the enable SLI configs, without going through this process. Give it a shot and let me know if there is any change.

Tier Four
No Japanese capacitors found. Only Taiwanese capacitors and may even include Chinese capacitors. Very basic safety circuits or even thin gauge wiring used. Not for gaming rigs or overclocking systems of any kind. Avoid unless your budget dictates your choice.

http://www.realhardtechx.com/index_archivos/Page362.htm

*** PSU tier list ***
http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

 

[turbopixel]

Your psu should be enough. Single GTX 970 requires at least 500 W psu with 30amp on 12 V rail. That includes a full setup of build. For two GTX 970 a 700 W psu is recommended. Your psu can deliver 750 W (or 744 W on 12 V rail only) and its 12 V rail states 62amp. So, it is plenty enough, with a bit room for overclocking.
> http://www.tweaktown.com/reviews/7125/corsair-cx750m-750w-80-plus-bronze-power-supply-review/index.html
The psu is not bad and should be enough for your build. But if you have enough money left, then you could consider a high efficent and top tier psu from top manufacturer, which is very silent too.
> http://www.anandtech.com/show/5464/seasonic-platinum-series-860w/6
> https://pcpartpicker.com/part/seasonic-power-supply-ss860xp2
On the other hand, it is very expensive.

 

[rcald2000]

"Uninstall the GPU drivers with DDU -> reboot computer -> download and install drivers only from Nvidia (don't install Geforce Experience for now) -> Reboot. Any change?"

Have you tried this yet?

 

[Arvs]

"Uninstall the GPU drivers with DDU -> reboot computer -> download and install drivers only from Nvidia (don't install Geforce Experience for now) -> Reboot. Any change?"

Have you tried this yet?

I haven't yet, will do this before digging into some other psu options, no sense in buying a psu if I can correct this with my driver y'know?
I really appreciate it!
I'll be back with the results

 

[Arvs]

"Uninstall the GPU drivers with DDU -> reboot computer -> download and install drivers only from Nvidia (don't install Geforce Experience for now) -> Reboot. Any change?"

Have you tried this yet?

K! Batman Arkham Knight is still crashing. This was with no sli setup, and the new drivers (not from GeForce Experience). I'm going to try a few more tests with a few games like, windowed/fullscreen, different graphic levels. I know Arkham Knight has some performance issues already so these other games will be true tests. (bf4, handful of smaller steam games, ARK)

 

[rcald2000]

Agreed. Batman Arkham Knight is a very bad game to test stability on. Please resume your testing with other titles.

 

[Arvs]

Agreed. Batman Arkham Knight is a very bad game to test stability on. Please resume your testing with other titles.

I was playing BF4 and not only did the game crash, my whole computer crashed and I got a blue screen with a message stating something about an unexception I think. (I'm running win8.1) I'd have to Wait to re create it for the exact error.

 

[rcald2000]

Check event viewer application and system logs.
Check for mini dump reports with the utility Blue Screen View (http://www.nirsoft.net/utils/blue_screen_view.html)

 

[rcald2000]

Also while gaming, check the cpu and gpu utilization and temps and report them back here. Usually excessive CPU temps would just make the CPU throttle itself and slow down, not reboot the computer. But I have heard of excess case heat causing northbridge chipset to reboot the computer. Long story short, I'm wondering if heat is your cause.

 

[Arvs]

K! I checked the event viewer, there are mini dumps here. One of these is on the same day as when I knocked a fan connector loose and the CPU did overheat. There are 2 more after that date (7/20) which state SYSTEM_SERVICE_ EXCEPTION. I'm not entirely sure what I'm looking for here though, I can confirm 4 mini dump files with a file name: "ntoskrnle.exe" highlighted in red.

 

[Arvs]

I found this as well, in regards to that "ntoskrnle.exe" (http://www.tomshardware.com/answers/id-2588365/ntoskrnl-exe-bsod-windows.html) If it's relevant.