UPS tripping/failure problem

[Abhishek_8R]

I have the following configuration:
i7 4790k
Gigabyte GA Z97 D3H
Kingston HyperX 1866MHz 8GB
Cooler Master G650M
MSI GTX 970 OC Edition
Cooler Master K380
Kingston 120GB SSD
2x2TB HDDs
Dell S2240L Monitor

The problem is of UPS,I bought a luminous 1000VA UPS and hooked my CPU to it.At idle or when light browsing etc.,whenever power fails the ups gives backup without any hiccup and the system keeps running but if I am playing some resource intensive games for e.g Crysis 3 and the power fails the UPS trips/fails and restart forcing my system to restart again and on backup mode if I try to play the game or any resource intensive app,the ups again trips and restarts.
Is this overloading or something related to APFC of smps?
I have ordered an APC apc BR1500g-in,will I face the same problem with it too?I am asking because the new ups costs too much and if it doesn't solve my problem,then I have no option.

 

[Cristi72]

Hello,

Your system has max. 400W consumption, so max. 550W from the wall (monitor included), which translates in at least an 800VA UPS.

How old is your UPS? For areas with frequent power surges, the batteries should be changed often (1 1/2, 2 years).
If it's fairly new, it could be the low quality of the UPS.

 

[Abhishek_8R]

Hello,

Your system has max. 400W consumption, so max. 550W from the wall (monitor included), which translates in at least an 800VA UPS.

How old is your UPS? For areas with frequent power surges, the batteries should be changed often (1 1/2, 2 years).
If it's fairly new, it could be the low quality of the UPS.

Its new but a tier 2 brand.I have ordered a schneider's APC BR1500G IN.How will it hold?

 

[Cristi72]

Hello,

Your system has max. 400W consumption, so max. 550W from the wall (monitor included), which translates in at least an 800VA UPS.

How old is your UPS? For areas with frequent power surges, the batteries should be changed often (1 1/2, 2 years).
If it's fairly new, it could be the low quality of the UPS.

Its new but a tier 2 brand.I have ordered a schneider's APC BR1500G IN.How will it hold?

If the UPS is new, it should hold for several seconds. One of my UPSes is a Quantex 1000VA, one of the lowest-end UPSes I have dealt with, which keeps beeping when gaming (my system draws close to 550W, and the PSU has active PFC), but still gives me 5 seconds of back-up if the power is lost... Are you sure you don't use some other power-hungry device, such as a powerful audio amplifier or a laser printer?

APC is one of the best PSU makers, it would work without issues and will give you around 8 minutes of back-up time at 500W (check the power/back-up time graph in the middle of the product webpage). Also, this specific model allows using an external battery, for even more back-up time.

 

[Abhishek_8R]

Hello,

Your system has max. 400W consumption, so max. 550W from the wall (monitor included), which translates in at least an 800VA UPS.

How old is your UPS? For areas with frequent power surges, the batteries should be changed often (1 1/2, 2 years).
If it's fairly new, it could be the low quality of the UPS.

Its new but a tier 2 brand.I have ordered a schneider's APC BR1500G IN.How will it hold?

If the UPS is new, it should hold for several seconds. One of my UPSes is a Quantex 1000VA, one of the lowest-end UPSes I have dealt with, which keeps beeping when gaming (my system draws close to 550W, and the PSU has active PFC), but still gives me 5 seconds of back-up if the power is lost... Are you sure you don't use some other power-hungry device, such as a powerful audio amplifier or a laser printer?

APC is one of the best PSU makers, it would work without issues and will give you around 8 minutes of back-up time at 500W (check the power/back-up time graph in the middle of the product webpage). Also, this specific model allows using an external battery, for even more back-up time.

Yes,the ups was a brand new one and comes from a company quite famous here for making good quality inverters,stabilisers and UPS systems.I don't know why it didn't work.I am sure nothing else was plugged in apart from the cpu and the monitor.The UPS was a 1000VA one i.e 600W(PF=0.6) and SMPS is of 650W.Even if in the overload condition for the ups i.e full 650W given by the SMPS,it should draw 748W from the UPS(being 85% efficient).But the system TDP is around 400W,so the excess power(its a lot) should be wasted as heat,but the smps isn't getting heated up at all(when operating on mains).Iknow though SMPS doesn't run this way.Just a theory.

 

[Cristi72]

Hello,

Your system has max. 400W consumption, so max. 550W from the wall (monitor included), which translates in at least an 800VA UPS.

How old is your UPS? For areas with frequent power surges, the batteries should be changed often (1 1/2, 2 years).
If it's fairly new, it could be the low quality of the UPS.

Its new but a tier 2 brand.I have ordered a schneider's APC BR1500G IN.How will it hold?

If the UPS is new, it should hold for several seconds. One of my UPSes is a Quantex 1000VA, one of the lowest-end UPSes I have dealt with, which keeps beeping when gaming (my system draws close to 550W, and the PSU has active PFC), but still gives me 5 seconds of back-up if the power is lost... Are you sure you don't use some other power-hungry device, such as a powerful audio amplifier or a laser printer?

APC is one of the best PSU makers, it would work without issues and will give you around 8 minutes of back-up time at 500W (check the power/back-up time graph in the middle of the product webpage). Also, this specific model allows using an external battery, for even more back-up time.

Yes,the ups was a brand new one and comes from a company quite famous here for making good quality inverters,stabilisers and UPS systems.I don't know why it didn't work.I am sure nothing else was plugged in apart from the cpu and the monitor.The UPS was a 1000VA one i.e 600W(PF=0.6) and SMPS is of 650W.Even if in the overload condition for the ups i.e full 650W given by the SMPS,it should draw 748W from the UPS(being 85% efficient).But the system TDP is around 400W,so the excess power(its a lot) should be wasted as heat,but the smps isn't getting heated up at all(when operating on mains).Iknow though SMPS doesn't run this way.Just a theory.

Your PSU is listed as tier 3 on Tom's, so a good PSU unless overclocking. Being loaded at max. 60% of its capacity, its efficiency is maximum, so it shouldn't have any issues delivering clean power.

The SMPS doesn't work that way, it varies the frequency and pulse width according to the load. So, if a PSU is rated at 650W, it will not draw 650W / (0.85x0.9) = 821 W (0.85: 85% efficiency; 0.9: power factor) all the time, but only when needed. For your power requirements: 400W / (0.85x0.9) = 523W from the wall (add the display, which consumes up to 19W). The 1000 VA / 600 W UPS rating should be enough; either the UPS is faulty, or the PSU's active PFC circuit is very aggressive.

How to test the UPS: try to use several light bulbs, see at what power the UPS cannot hold.