PC Shutdown even with UPS

[Derstine Buyagan]

I recently upgraded my machine from Intel Core i5 3470 to Ryzen 7 but keep my old components and only replaces CPU, Motherboard and RAM. Now, when there's power interruption, my UPS can't handle it anymore and just shut my computer down unlike when i was using the i5 where i do still have time(3 minutes) to safely shut down my machine avoiding damage.

Here are my i5 components before upgrading it to Ryzen 7
CPU: Intel Core i5 3470
RAM: 2x8GB DDR3 1866MHz
MotherBoard: Gigabyte H61M-DS2
Storage: 1x128GB SSD | 2 x 1TB HDD
Fan: (4) 120MM Fan | (2) 80MM
PSU: DeepCool True Rated 500w
GPU: NVidia GT 220
Monitor: 2 Monitors Attach


Here are my components now
CPU: Ryzen 7 2700 @stock
RAM: 2x8GB DDR4 3000MHz
MotherBoard: MSI Bazooka
Storage: 1x128GB SSD | 2 x 1TB HDD
Fan: (4) 120MM Fan | (2) 80MM
PSU: DeepCool True Rated 500w
GPU: NVidia GT 220
Monitor: 1 Monitor Attach


UPS: 650VA
https://www.openpinoy.com/goods/images/20120430025516cont.jpg

Regards

 

[little_me]

it is pretty much certain that ryzen setup's power draw is higher than old I5's
your UPS is 650VA, which does not mean 650W but closer to 430 to 450W or so.
While that should still be enough, I suspect that the peak power draw is just a bit over what your UPS can put out at which point it fails and battery capacity doesn't matter anymore.

That is the most likely reason as far as I can think of.

Edit:
googling about it more, Ryzen should take less power since it's TDP is 65W compared to I5's 77W
DDR4 should also use a tiny bit less power than DDR3 (we are speaking of 1% to 2% less so not really noticeable)

The motherboard and all it's new shiny USB3/other stuff will likely take a bit more though compared to old motherboard and looking at PSU-UPS power ratings, it is still highly likely that you were pretty much near the top of the line as to what UPS can put out.

 

[Derstine Buyagan]

it is pretty much certain that ryzen setup's power draw is higher than old I5's
your UPS is 650VA, which does not mean 650W but closer to 430 to 450W or so.
While that should still be enough, I suspect that the peak power draw is just a bit over what your UPS can put out at which point it fails and battery capacity doesn't matter anymore.

That is the most likely reason as far as I can think of.

But the Ryzen just comes with a single monitor attach while the i5 is powering a dual monitor. I tried to compute my power consumption using the online tool from cooler master and the result is just below 400w

How much UPS power do i need now in order to power on my PC, i'm planning to attach dual monitor on the UPS just like what i do with the i5 before.

 

[little_me]

Depends on the monitor power ratings, I would suspect them to be in 50 to 75W range.
I would take computer at PSU's power rating (which will be too little if you ever upgrade GPU) add monitors and multiply it by 1.5

so 500+75+75=650*1.5=1000VA minimum to be safe. It will likely work with less but... changing UPS constantly is also a hassle.

It is also possible that the batteries inside UPS have just gone bad after and can't hold charge which is why they are not working.
Before spending money you could possibly check that. (provided said batteries are serviceable/changeable)

 

[Paperdoc]

On several other sites I see that this UPS is rated at 650 VA and 390W max. I could not find any specs on how long it can supply that max 390 W once power is off, but it is likely only a few minutes. THEN we do not know whether the battery in the unit now is weaker, and that might reduce even the 390W figure.

 

[Derstine Buyagan]

On several other sites I see that this UPS is rated at 650 VA and 390W max. I could not find any specs on how long it can supply that max 390 W once power is off, but it is likely only a few minutes. THEN we do not know whether the battery in the unit now is weaker, and that might reduce even the 390W figure.

I really don't know if the battery is weaker now as I just purchase this last August, how long is the expected lifespan of a UPS?

 

[Paperdoc]

I'd certainly expect better than 1 year, but it could be not that good. What MAY be more important is that the unit was just barely enough before, but the new system needs more power and it cannot meet that requirement, even if the battery is perfectly good. MAYBE you were misled by the "650 VA" spec, and did not realize that it can only provide 390 W max, and that can only be provided for a FEW minutes.