Question UPS not working as intended, need urgent help

[Kirito-kun]

My specs:

i5-3570, H61, 4GB*2, RTX 2060, 550W Bronze+ CM PSU, 2 SSD, 2 HDD, RGB Keyboard and Mouse, Bluetooth and WIFI Adapter, 3 ARGB and 1 Non RGB Fans on case and Acer 22 inch IPS Monitor.



I have a inverter at my place but due to frequent power cut in my area, I bought ENTER UPS E-U740 LINE UPS (Output Power Wattage: 360 W) from a local shop to protect my GPU for that 1 minute when the electricity cuts off and switches to Inverter, it provides good backup during normal usage (when GPU is not in use), but whenever I am playing games COD series, GTA V, the moment electricity goes off my pc crashes and when in next second the inverter kicks in, it restarts. I thought there was something wrong with my UPS, I took my CPU and UPS to the shop, but there it managed to play GTA V, Genshin Impact and COD:MW Remastered for total 4-5 minutes before discharging. I brought it back home, separated Monitor connection directly to board and tested same thing (switched off power connection during Genshin and it survived), I thought it solved the problem but again just 30 mins back , my friend was playing COD:MW and electricity goes off and again PC goes off. This is so much frustrating!!! Please need urgent help!!!



Another point to Note: When I am cutting off the electricity first and starting PC on UPS directly, I am able to run few games (Genshin , COD:MW, GTA V) for few minutes, but whenever I am playing on electricity through UPS, the moment electricity goes off the PC shutdowns, the UPS IS NOT PROVIDING EVEN A SECOND BACKUP!

 

[BFG-9000]

Clearly, the UPS is overloading even with the monitor not connected to it. That system alone is about 330w gaming if nothing is overclocked which should usually require at least a 750VA UPS, since 330w from the PSU at 80% efficiency means 412w into the PSU, and therefore the load the UPS must support even with no monitor attached to it.

Given the claimed specs of your unit is 10-15 minutes runtime and you only get 4-5, how believable exactly is that 650VA/360w in the title of those listings when the description below it often instead lists 600VA/300w and hilariously 100% efficiency too. And even if they were telling the truth, well they don't claim to work with 400+w.

Either try a more reputable brand of UPS at 750VA (one with an actual website and official specs, rather than whatever the retailer wants to claim) or massively oversize a cheap one like ~1500VA. Just because the model number has 740 in it doesn't mean it can supply 740VA