GTX 980 Ti SLI PC Rebooting During gaming.

[nicholasthrupp]

Hi there,
i have been having issues recently (last few months at least) with my PC shutting down/rebooting during gaming.

It will instantly shut off and then restart and go back to my desktop like nothing happened.

It is only playing certain games that this will happen as well, and not necessarily very demanding games either, overwatch is the game it happens on the most, alot of the time shutting down as the game finishes and enters the 'play of the match' clip.

I believe that I have ruled out that this is not an issue of the power supply being to small/being able to handle the demand on it during gaming as my power supply is A 1000w Raidmax and many other reasons below,

overwatch is not very demanding on my graphics cards as I usually play it in 4k locked at 60fps and my two 980 ti's have no problem keeping it locked there.

i have also switched out to 2k resolution and still have this problem.

my graphics cards temp's never get over 70 during gaming, my temp limit is set at 85 in MSI afterburner. (neither are overclocked), CPU temps are also fine and I have also ran intel burn test on this for a while.

I have ran through multiple unigine heaven benchmarks and had no issues at all (still getting the same scores i used to, 4200 or so)

i have had no such issues running the witcher 3 in 4k resolution 50-60FPS (obviously at my cards limit's)

I have disabled my SLI and ran some tests as well and played hours of overwatch in this state and found that I do not get any shutdowns/reboots when SLI is disabled.

I have tried going to the latest possible drivers, and also going to drivers from over a year ago, and doing a clean install each time.

i am yet to try swapping out my cards and running my games/benchmarks on my second card individually to see if its that card at fault.

I am yet to try another SLI bridge to see if that is at fault.

i have not checked the Power draw of my power supply yet either though by the ratings of my system and the 1kW power supply, I should be 100s of watts off my limits.

The graphics cards are identical ASUS Strix 980 Ti

Has anyone had similar issues? i just fInd it strange that I can get through benchmarks and the most demanding games without shutting down but then games like overwatch even in low resolution can cause it to shut down.




SOLVED - 24/05/17 - It seems to have been the 1000W Raidmax PSU causing the issues, have swapped it out with a 1000W Corsair and have been running that for weeks with no crashes.

 

[nicholasthrupp]

my opinion it is 850w sli rig stock if I were going to oc the cards and my cpu then I would want at least a 1000w I like to have at least 20% overhead

if your banging 65 amps with all that at stock with a 20% overhead that's 13 amps so that's a 78 amp psu 850 is 70 amp [70.8] so you get a 1000w psu that's 83 amps to cover and the more overhead / ''overkill'' you have in the psu the less stress and heat it will do to try to keep up

like you can easy lift 50 pounds for 2 hrs but now your forced to lift 100 so your going to get hot and tired quick and your arms may give out . [crude example ]

you got a 70 amp unit and you crank it up to 68 amps full load for hrs it going to get pretty warm and your running right at its max . if you catch my drift on that

but if you got a asus srtick cards that are the 280w cards or a 325 w card ??? see how that difference in the cards can make as far as what the total amps maybe needed ?

2-280w stock card = 47 amps [46.6]

2-325w cards = 54 amps [54.1]

now do you got a 80w CPU or a 125 w cpu ? 80w =6.6 amps 125w = 10.4 amps

everything adds to the total and little hardware changes can increase or decrease amps needed so you get too small a psu and then you add a power hungry hardware could put you over and your then looking at another new PSU to cover that .

as the say to each his own on whats best I want -0- issue psu and well covers any hardware I decide to use and not have to worry if its going to be good enough , unless I got a junk unit in some way I know the one I bought and use is and I'm covered

if I need 54 amps I stll go with a 750 850 w PSU that 70 amps will hold that easy and never stress or warm up to do so and should all way give me good clean full power at any full load all day long

anyway that's all matter of opinion

a psu is the hart and life blood of your build and everything depends on full clean stable power from it of it tends to fail in some way if not

So I have the I7 4790 (non K), so that is an 84w CPU i believe.

I did some testing last night with a watt/amp meter and got some values for what Watts my power supply was using on the Input side (230vac) of my old crappy 1000w Raidmax power supply.

Idle was 120-200w
Heaven benchmark was 500-600w
Overwatch on uncapped frames, 4k, every setting maxed out was 500-600w
Dying Light " " " 500-650w
The Witcher 3 " " " 450-550w

So the max I was able to use was 650w on the Input side of the power supply, this crappy 1000W Raidmax power supply was a 80+ gold so I will say its efficiency will be 85% (roughly) so the Output watts will be 650 x 0.85 = 552w.

That puts me roughly 300w below my max rated Output.

The new Corsair 850w should have the same Output watts.

I don't actually really intend to overclock these cards (not yet anyway) but if I do, looking at the actual figures I should still have plenty of headroom?

 

[junkeymonkey]

don't know what the AC input from the wall translates to 12v at the hardware ?

but you see here my 980ti under max GPU power was 276w that one card draw was 23amps for what ever I was running at that time when that reading was taken

http://imgur.com/kpno2wn

Board power limit
Target: 250.0 W
Limit: 275.0 W
Adj. Range: -40%, +10%

I use a seasonic x850 and I would SLI this card cause at best there going to pull 50 amps from the 70 the 850w PSU ''should'' stabily supply to the system cause its not like or near what that zotac 980ti can draw if I had 2 of them zotac cards pulling that 390w+ at sli = 65 amps ???

the 850w may not cut it for 2 of them pounding away the unit is only 70 amps then 2 zotacs may need all of that for themselves and now that 1000w psu is looking good


I guess when your new PSU comes in and you get it all going then you will know where it stands . if the issue seems to of gone may of been that raidmax

 

[nicholasthrupp]

don't know what the AC input from the wall translates to 12v at the hardware ?

but you see here my 980ti under max GPU power was 276w that one card draw was 23amps for what ever I was running at that time when that reading was taken

http://imgur.com/kpno2wn

Board power limit
Target: 250.0 W
Limit: 275.0 W
Adj. Range: -40%, +10%

I use a seasonic x850 and I would SLI this card cause at best there going to pull 50 amps from the 70 the 850w PSU ''should'' stabily supply to the system cause its not like or near what that zotac 980ti can draw if I had 2 of them zotac cards pulling that 390w+ at sli = 65 amps ???

the 850w may not cut it for 2 of them pounding away the unit is only 70 amps then 2 zotacs may need all of that for themselves and now that 1000w psu is looking good


I guess when your new PSU comes in and you get it all going then you will know where it stands . if the issue seems to of gone may of been that raidmax

i ended up Swapping out for the 1000w Corsair PSU, for may as well for just $30 more. has just arrived today.

The old Raidmax seems to have gone a lot better after having a good clean of its filter etc.. I had one crash a few hours after cleaning it all out, and maybe another crash the next day (about a week ago) and since then I would have done 25 hours of gaming with no crashes, which to me seems strange that I had crashes not long after cleaning it out but then none since then.

Either way I will put the new Corsair 1000w in, and if the crash doesn't happen for the next week or two from their I will conclude that it was the crappy Raidmax causing it.

Despite going better after a clean out and running better after having the airflow improved, the Raidmax PSU would have barely been above 50-60% load at max so should not be overheating and crashing like this.

I will update in a week or two with how the new Corsair goes.