PC restarts on UPS when running a game

[ahsun]

My PC restarts with a UPS beep when there is a voltage fluctuation or randomly when I'm running a game. I'm using a Mercury 1000 W UPS to run my 1000 W PSU and LCD. Earlier, I had a 750 W PSU which gave the same problem. I upgraded to 1000 W thinking maybe the system was drawing a lot of power.

I already tried plugging the LCD separately but the PC would still restart on fluctuation (running 2 gtx 780s in SLI).

I had tried disabling anti-surge support in my previous board ( Asus p8z-77) and it malfunctioned most likely due to this.

Also I have a 1000W stabilizer that I have tried both as input and output to UPS. But nothing works. A minor fluctuation restarts the PC in game.
Please help me solve this issue. Thanks

my UPS : http://www.mercury-pc.com/product-detail.php?link=p-ups&subtitle=UPS&productid=1171

 

[laviniuc]

you should enable power profiles to disable the big consumers (the graphics cards) and lower the cpu power when running on battery. you have to remember the ups is not designed to handle those kinds of loads, yes, i can carry 1000va (volt amps) of power but that's not how much power it can output max, it can deliver up to 600W over that and it restarts. and 2 780's running at full load will go over that.

look at the rating output from this page and select one with over 1000W and take into account that they may sweeten the numbers a bit - so the actual number that the psu can handle is probably closer to 500W
http://www.mercury-pc.com/product-spec.php?productid=1171

you will want the stabilizer in front of it to help it cope with the sudden power loss, the screen you should not turn on after the power is lost, the sudden increase in power draw can also restart the ups.

 

[laviniuc]

what's your psu model?

 

[ahsun]

what's your psu model?

corsair rm1000 80 plus gold
http://www.corsair.com/en-us/rm-series-rm1000-80-plus-gold-certified-power-supply

 

[laviniuc]

your problem is also the psu has a below normal hold up time (how long it can survive without power) ~10ms whereas the ups needs 8-15ms to switch to battery.

don't get me wrong, it's a very good psu overall just happens to be not so stellar at the holdup time... if you have another psu around, switch to that and just one graphics card and check if the problem replicates.
http://www.techpowerup.com/reviews/Corsair/RM1000/5.html

 

[ahsun]

Ok.. so should I go for a custom UPS-Inverter system or get this mercury elite 2000 (says rated o/p is 1200W and transfer time max 10s) http://shoprex.com/electronics/power-supplies/ups/mercury-elite-2000-pro-pc-ups-up000065-mpid13929

 

[laviniuc]

i don't know to be honest, best wait for an answer from someone else first just in case