Old UPS not working with new PC

farz_ahmed · Dec 31, 2013

I had an old PC with these specs-
intel dual core 2.0 GHz
2 gb ddr2
450W PSU smarty
DVDRW and 500 gb HDD

I have replaced my CPU with-
i5 3470
2x4gb corsair vengeance 1600MHz
corsair VS650 PSU
MSI B75-P45
1 tb WD HDD

I have kept my gpu same(gt 9500 1 gb) which i am going to replace with gtx 760 in few months..

My UPS(Powercom IND601A) dint give backup to new CPU(shuts off when power down).
I changed the battery of UPS but didnt work,however it works with old CPU...

My new CPU's current usage should be below 360 W(which is the UPS rating)..

So what is going wrong?? Please help.

Metalrenok · Dec 31, 2013

Did you replaced the PSU?

KillerGamer · Dec 31, 2013

Bottlenecking. Your GPU is bottlenecking the CPU. I suggest you remove your GPU and run with integrated graphics. My CPU has the same integrated graphics and it can run games like BeamNG Drive (with mods) and The Next Car Game. Although you'll need to keep everything at low with 1024x768 resolution, it will run at above 45fps at all times.

farz_ahmed · Dec 31, 2013

Metalrenok :

Yes,with corsair's VS 650.I chose this because I figured my total Watt usage after buying gtx 760 would be around 320W..So chose 650W to keep at at half load(max Efficiency)

Metalrenok · Dec 31, 2013

farz_ahmed :

Hmm and the UPS is 600VA?
The old cpu is working with the new PSU?

KillerGamer :

What does it even has to do with the guy's problem?

photonboy · Dec 31, 2013

Your problem is likely that the UPS isn't compatible with the PFC circuit in modern power supplies.

You either require a compatible UPS like THIS (note the "PFC" in the name): http://www.cyberpowersystems.com/products/ups-systems/pfc-sinewave-series/CP1000PFCLCD.html?printVer=true

or,
You need a Power Supply without the PFC circuit, but I'd recommend a new, compatible UPS especially if your UPS is old (the battery does wear out).

farz_ahmed · Dec 31, 2013

photonboy :

What if i buy an 800VA/450W UPS which has PFC ckt???
Is it specified for every Power supply whether it has PFC ckt or not???

farz_ahmed · Dec 31, 2013

When i shut mains off,PC was on for about 30 seconds,and the UPS was making a weird sound (like vibration)..Then the PC shut off...

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Old UPS not working with new PC

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