1070 SLI pc restarting while gaming

evo4ever86 · 7 Oct 2016 at 13:23

Hello all.

I've recently added another 1070 for SLI. My problem is when gaming under heavy load my pc restarts randomly in certain games. This only happens when I'm overclocking the cards. I don't get any restarts @ stock speeds.

Also they run fine on their own (no SLI) overclocked or not overclocked.

Could this be a PSU issue? I'm using an unknown (EVO LABS i think) brand 750w PSU.

Help much appreciated!

Greebo · 7 Oct 2016 at 13:25

From your symptoms highly likely to be a PSU power issue.

Your cpu is heavily overclocked and sucking tonnes of juice already, at that voltage and clocks, maybe 250W alone.

BTW I thought 1.4v and above wasnt advisable for Skylake? 1.38v is about max recommended volts?

evo4ever86 · 7 Oct 2016 at 13:26

Greebo said:
From your symptoms highly likely to be a PSU power issue.

Your cpu is heavily overclocked and sucking tonnes of juice already.

I thought 750w is enough for 2 cards? Obviously not in my case. What PSU would u recommend?

Greebo · 7 Oct 2016 at 13:36

evo4ever86 said:
I thought 750w is enough for 2 cards? Obviously not in my case. What PSU would u recommend?

Thing is not every PSU is equal plus they degrade over time. Once a PSU is ushed to its maximum, its fair more likely to have a hiccup which causes a system reboot.

As I have said already, you are using 250W of of maximum 750W PSU for your cpu alone.

Thats 500W Maximum left for your two cards, mobo, hard drives, other cards etc which isnt a lot when overclocked each 1070 can be using up to 250W

Probably why your system is fine until you overclock your cards.

I always like to never go above two thirds of the maximum of a psu so on that basis you want a 1100W or bigger PSU personally.

Im a bit out of touch as to what the best current brands are with PSU but look in the forum section on here or I always swear by Johhnyguru reviews http://www.jonnyguru.com/modules.php?name=NDReviews&op=Review_Cat&recatnum=13

evo4ever86 · 7 Oct 2016 at 13:39

Greebo said:
Thing is not every PSU is equal plus they degrade over time. Once a PSU is ushed to its maximum, its fair more likely to have a hiccup which causes a system reboot.

As I have said already, you are using 250W of of maximum 750W PSU for your cpu alone.

Thats 500W Maximum left for your two cards, mobo, hard drives, other cards etc which isnt a lot when overclocked each 1070 can be using up to 250W

Probably why your system is fine until you overclock your cards.

I always like to never go above two thirds of the maximum of a psu so on that basis you want a 1100W or bigger PSU personally.

Im a bit out of touch as to what the best current brands are with PSU but look in the forum section on here or I always swear by Johhnyguru reviews http://www.jonnyguru.com/

Would this PSU do: https://www.overclockers.co.uk/cougar-gx-v3-1050w-80-plus-gold-modular-power-supply-ca-025-cu.html

JediFragger · 7 Oct 2016 at 13:42

Evo - Your sig is too large man, 3 lines max

Greebo · 7 Oct 2016 at 13:44

Probably fine as far as power goes but I have never heard of the brand.

Never ever skimp on your psu though. I have had PSU fail before and they have taken the mobo, cpu and gfx card out with them.

Superflower, Corsair and EVGA are all good solid brands.,

Greebo · 7 Oct 2016 at 13:47

https://forums.overclockers.co.uk/showthread.php?t=18749558

Sasahara · 7 Oct 2016 at 13:50

A decent make of 750 W PSU would be ok, that EVO LABS 750w PSU is a piece of junk.

XXX Series 750W 80 Plus Bronze Modular Power Supply £85.99
https://www.overclockers.co.uk/xfx-...us-bronze-modular-power-supply-ca-025-xf.html

Golden Green HX 750W "80 Plus Gold" Semi-Modular Power Supply £86.99
https://www.overclockers.co.uk/supe...emi-modular-power-supply-black-ca-011-sf.html

The cheapest I'd recommend.

If you wanna spend more, any seasonic 750 W + would be fine.

https://www.overclockers.co.uk/pc-c...t&ckSuppliers=251-538&ckTab=0&sPage=1&sSort=3

IvanDobskey · 7 Oct 2016 at 13:54

Yep, I reckon it's nailed on that your PSU is not up to snuff. Never heard of that brand.

A decent brand 750+ watt PSU will do the job. Never ever skimp on your PSU. Most important part of your PC.

Radox-0 · 7 Oct 2016 at 13:55

I would check your CPU overclock and tone it down say 200ghz and see what happens. I get that happen when my CPU OC is not fully stable. May be when you added your second card has added some more CPU load.

Greebo · 7 Oct 2016 at 13:56

Personally with his system pulling 700W I wouldnt skimp on just getting a decent brand 750W. I would go 850W at least and have a bit of breathing space

evo4ever86 · 7 Oct 2016 at 14:06

Thanks for the replies guys. My suspicions were correct on the PSU. I've also noticed I'm running out of RAM while gaming at 4k maxed out. Nearly all my games throw an 'out of memoy' or 'memory low' issue. Increasing the page file to 16GB fixes it but not recommended for long term use. So it's a new PSU and more RAM lol

Greebo · 7 Oct 2016 at 14:19

There is no way you should be running out of ram. Until last week I had 16Gb and never ever saw a message to say that I was running out of ram. I upgraded to 32Gb for other reasons.

You did install 64 bit version of windows?

Sasahara · 7 Oct 2016 at 14:20

Greebo said:
Personally with his system pulling 700W I wouldnt skimp on just getting a decent brand 750W. I would go 850W at least and have a bit of breathing space

I would say he's pulling 650 W from the wall max (Gold PSU). If he has something that runs the CPU and SLI GPUS all at 100%, which would be a rare task in gaming.

I would expect most of the time less.

650W from the wall on a gold PSU, that's only 585 W output.

Not that there's anything wrong with over specing, but it's not absolutely required here.

A wall meter is a nice item to have and they only cost £10-£20.

Greebo · 7 Oct 2016 at 14:35

Sasahara said:
I would say he's pulling 650 W from the wall max (Gold PSU). If he has something that runs the CPU and SLI GPUS all at 100%, which would be a rare task in gaming.

I would expect most of the time less.

650W from the wall on a gold PSU, that's only 585 W output.

Not that there's anything wrong with over specing, but it's not absolutely required here.

A wall meter is a nice item to have and they only cost £10-£20.

Thought it would be higher than that. Googling suggested 250W for his cpu alone (v high oc and voltage on that) and his 1070s overclocked can both pull 200 to 250W each.

Just advising that replacing his troublesome psu with one with little head room might not be the best idea for the little bit extra it costs.

Plus, personally I like to stick around two thirds capacity but thats just me. Means the psu isnt ever stressed and the fan ticks over or doesnt even spin when load is down.

I didnt need 1200W in my current system and doubt I am using 500W atm but my psu has lasted 7 years now without skipping a beat and seeing me through 3 different builds including SLI and xfire where i might have peaked at 800 to 900W.

evo4ever86 · 7 Oct 2016 at 14:54

Greebo said:
There is no way you should be running out of ram. Until last week I had 16Gb and never ever saw a message to say that I was running out of ram. I upgraded to 32Gb for other reasons.

You did install 64 bit version of windows?

Yeah I get errors from windows saying 'low on system memory' or 'out of system memoy' while gaming. Only on 4k though. Increasing the page file in virtual memory to 16GB fixes the problem. I'm running win10 x64.

JediFragger · 7 Oct 2016 at 14:56

Tbf, is it really worth £100+ in order to run your 1070's overclocked for a few more fps? I'd personally run them at stock and be happy I saved the dosh tbh

But then again I run a pair of FTW's for 3440 res so I'm probably overkill

evo4ever86 · 7 Oct 2016 at 14:58

JediFragger said:
Tbf, is it really worth £100+ in order to run your 1070's overclocked for a few more fps? I'd personally run them at stock and be happy I saved the dosh tbh

But then again I run a pair of FTW's for 3440 res so I'm probably overkill

I get an extra 10-15fps maybe more while overclocked. and thats very welcome when playing at 4k lol.

Greebo · 7 Oct 2016 at 16:16

JediFragger said:
Tbf, is it really worth £100+ in order to run your 1070's overclocked for a few more fps? I'd personally run them at stock and be happy I saved the dosh tbh

But then again I run a pair of FTW's for 3440 res so I'm probably overkill

To be fair with £1000's of internals why would you run it from a unknown make PSU? Ignoring the overclock issue he should be changing his PSU ASAP!!!!!