How many watts is my PSU?

ButterflyEffect15 · May 28, 2015

I need to know there wattage of my PSU.
I have taken the case off and can't find anything in bold or in the model number, in small writing it says.

Peak: 360w( last for 17 second) also
TOTAL 300W MAX.

I'm planning on installing a GTX 750ti and assuming this will be ok if it is 300w? Thanks

Zerk2012 · May 28, 2015

Power supply questions always list all the parts of your PC, but in general should be fine.
Unless your processor draws 125 Watts.

ButterflyEffect15 · May 28, 2015

CPU: I5 4460
MOBI: Asus H81M-E
Ram: 6gb ddr3 (4/2)
1TB HDD
Dvd-rw
Nvidia GT 620 (to be replaced)

Sapphire Thunder · May 28, 2015

The wattage indeed is 300W. All power supplies can go over their said maximum for a little while, so that is what the "peak" wattage is.

750Ti takes about 80-120W through the motherboard, leaving 220W-180W for everything else so it should be ok.
Cpus don't usually take more than 150W. (high clock cpus like AMD FX-8xxx and Intel i7).

helpstar · May 28, 2015

Look for a 750ti, which doesn't need an additional 6 pin power plug.
Before upgrading, install up to date NVIDIA drivers and flash the bios of the motherboard to the latest version. Use an USB thumb drive and extract the latest bios file to it. Reboot and enter bios, search for flash or bios update.
Never update bios in Windows!

ButterflyEffect15 · May 28, 2015

OK thanks for quick replies also would 750ti play all games atleast 30fps on low settings, games such as GTA V and COD:AW or is it worth saving for a better card and new psu

ButterflyEffect15 · May 28, 2015

I have latest drivers for GT620 is that same or are they model specific?

Sapphire Thunder · May 28, 2015

ButterflyEffect15 :

Well, it surely can run GTA V at good enough graphics (1080p 60fps low-mid on GTA V and COD)
But at the same time, it would be better to save up for better gpu and psu.

ButterflyEffect15 · May 28, 2015

Think I will buy this now and upgrade In near future

nukemaster · May 28, 2015

I would not mind an image of your power supply sticker.

While 300 watts is 300 watts. How much of that is on the important 12 volt rail is another question.

The 750ti should not take over 75 watts because it sticks to the older PCI-E specs for power draw. I do not think many companies push this limit because older boards may have issues.

While I agree that a 300 watt power supply should be enough. It depends on the 12 volt out out. It can range from 14-24amps @ 12 volts. This is quite a range from 168 watts to 288watts. This makes a difference because many of the heavy parts of the system run on the 12 volt rail. The CPU/GPU and most of a 3.5 inch hard drive and parts of a motherboard run on 12 volts.

Example image. This 300 watt power supply has a combined 12 volt rail current of 22 amps or 264 watts @ 12 volts.

boosted1g · May 28, 2015

Is the PC an OEM computer (like HP or Dell) or a custom built.

OEM with no brand on label power supply - you are fine.

Custom built with such a cheap power supply they wont even put a brand name on it - I wouldn't advise you use it out of fear of it frying everything.

ButterflyEffect15 · May 28, 2015

Its a pre- built Asus m32ad
Sticker branding is Ac Bel, 80 plus bronze rating

12v stats look like this:

+12v1===10A}
} TOTAL 228W MAX
+12v2===12A}

Zerk2012 · May 28, 2015

Sapphire Thunder :

65 Watts a PCI lane can only push 75 watts nothing near 120.

ButterflyEffect15 · May 28, 2015

http://www.acbel.com/eng/Product.aspx?id=79&&sd=31&&pid=426
This the exact PSU, so do you think will be OK?

nukemaster · May 28, 2015

As long as it delivers the rated output it will be fine. You do not have much headroom.

You have 19amps @ 12 volts.

The only "low power" system i have to compare to is my i5 750 + GTX 650ti system. It will not break 180 watts even under very heavy loads. I have a bit more headroom because the power supply has 264 watts @ 12 volts.

It should work, but it on the lower end for sure. Remember modern hardware uses much less power at idle and you have some fairly efficient parts in the system helping keep your power consumption low.

ButterflyEffect15 · May 29, 2015

Thanks I will get a 750ti without 6pin and underclock until I get a new PSU if needed

nukemaster · May 29, 2015

You should not have to under-clock the card. It is very power friendly.

I am not even sure if your power supply has a 6 pin connector.

How many watts is my PSU?

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