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Is a PSU Wattage over what your system uses ok to use?

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Topic

Derpitron 29 days ago

For clarification, my build uses about 109 watts, but I can only find PSU's for 350 watts. Is using something like a 400 watt PSU ok, or would it be overkill, or would it (heaven forbid) destroy something with too much charge, or worse?

Comments Sorted by:

kschendel 1 Build 2 points 29 days ago

It's perfectly fine. The only thing bad that happens when you buy a PSU with excess wattage is that your wallet becomes emptier.

I could maybe imagine that massively overbuying a PSU could put you on a very bad part of the efficiency curve, but you'd have to be doing something like a 1500w PSU in a 100w build. Even then, nothing bad would happen except the PSU would waste a bit more electricity.

Power estimates are just guesses, so it's not a bad thing to have a PSU rated for a little bit more than the estimate shown.

mark5916 2 points 29 days ago

You should at least select a 450 PSU regardless how low your builds power consumption is estimated for.

For the reason, that there aren't any decent PSUs with a rated wattage of 350 or 400.

And the most of them aren't good enough for the demands of a recent build.

Decent PSU's are having very good efficiency ratings, even with a build that does not consume more than 100 Watts!

So choosing such a PSU unit, wouldn't be a problem at all. :)

thunder-93 1 point 29 days ago

Derpitron,

If your build will use around 109 watts, then any PSU above that is just fine. The PSU will only draw/use the power needed and won't ever provide "too much charge". So using a 350W or 400W PSU is just fine...it won't hurt anything at all, and you won't have any problems.

If you'd like more assurances, please share a little more info about the components of your build. I do partially agree with mark5916 that I don't typically recommend any PSUs below 450W ... but it does depend a lot on your specific build and what you're using it for. With only 109W, I'm assuming this is a machine basically for surfing the web and maybe some office automation applications.

Derpitron submitter 1 point 29 days ago

PCPartPicker part list / Price breakdown by merchant

Type Item Price
CPU AMD - Ryzen 5 2400G 3.6 GHz Quad-Core Processor ₹13495.00 @ Amazon India
Motherboard MSI - B450M PRO-M2 Micro ATX AM4 Motherboard ₹6963.00 @ Amazon India
Memory Corsair - Vengeance LPX 16 GB (1 x 16 GB) DDR4-2400 Memory ₹9200.00 @ Amazon India
Memory Corsair - Vengeance LPX 16 GB (1 x 16 GB) DDR4-2400 Memory ₹9200.00 @ Amazon India
Storage Kingston - A400 120 GB 2.5" Solid State Drive ₹1788.00 @ Amazon India
Storage Western Digital - Caviar Blue 1 TB 3.5" 7200RPM Internal Hard Drive ₹3230.00 @ Amazon India
Optical Drive LG - GH24NSD1 DVD/CD Writer ₹1018.00 @ Amazon India
Monitor Asus - VP228H 21.5" 1920x1080 60 Hz Monitor ₹13099.00 @ Amazon India
Other ZEBRONICS COMPUTER CASE (COAL) ₹2799.00 @ Amazon India
Other Gigabyte GP-PW400 400-Watt Power Supply (Black) ₹2799.00 @ Amazon India
Prices include shipping, taxes, rebates, and discounts
Total ₹63591.00
Generated by PCPartPicker 2019-03-24 12:20 IST+0530

This is my Parts List. It's not really for just web surfing, but it's for low to mid end gaming.

ImperiousBattlestar 1 point 28 days ago

Then, it should be fine, but a few things first.

  • Why 32GB RAM? (it isn’t really necessary unless you pave got the workloads to back it up)
  • SSD is on the small side.
  • PSU is mediocre
  • Is an optical drive really needed
Derpitron submitter 1 point 28 days ago

-32 GB Ram, because I'll be playing Minecraft (that stuff needs way more than 6Gb ram to even work with mods), and also BeamNG (it needs quite a bit of RAM) -The SSD's small, but I won't be having many games, mostly just Minecraft, and BeamNG Drive. -I'm still working out the PSU -Unfortunately, an Optical Drive is still needed a lot where I live in India, so I just added it in.

ImperiousBattlestar 1 point 27 days ago

Still, you could improve your list

PCPartPicker part list / Price breakdown by merchant

Type Item Price
CPU AMD - Ryzen 5 1600 3.2 GHz 6-Core Processor ₹12836.00 @ Amazon India
Motherboard MSI - B450M PRO-VDH Micro ATX AM4 Motherboard ₹7589.00 @ Amazon India
Memory *ADATA - XPG GAMMIX D10 16 GB (2 x 8 GB) DDR4-3000 Memory ₹11320.00 @ Amazon India
Storage Kingston - A400 120 GB 2.5" Solid State Drive ₹1788.00 @ Amazon India
Storage *Western Digital - Caviar Blue 1 TB 3.5" 7200RPM Internal Hard Drive ₹3235.00 @ Amazon India
Video Card Zotac - GeForce GTX 1060 3GB 3 GB Mini Video Card ₹14900.00 @ Amazon India
Optical Drive LG - GH24NSD1 DVD/CD Writer ₹1017.00 @ Amazon India
Monitor Asus - VP228H 21.5" 1920x1080 60 Hz Monitor ₹13099.00 @ Amazon India
Other CORSAIR CP-9020120-NA 450W Power Supply ₹4099.00 @ Amazon India
Other ZEBRONICS COMPUTER CASE (COAL) ₹2799.00 @ Amazon India
Prices include shipping, taxes, rebates, and discounts
Total ₹72682.00
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2019-03-26 07:49 IST+0530
  • Better PSU
  • Better CPU and GPU combo (this should be fine with both titles mentioned)
  • 32GB RAM isn’t really needed (only if you plan on doing heavy workloads). 16GB should be fine, even with larger maps
Goodperson5656 -1 points 29 days ago

Yes. According to PCPartPicker, My build draws approximately 300-400 watts (But you can never completely trsut wattage estimators.) But the graphics card manual recommends to have a 650 watt power supply. I took the old 750 watt power supply from my old build and stuck it in.

mark5916 2 points 29 days ago

GPU manufacturers always overestimates the PSU recommendation, because they don't know the remaining parts of your build.

So for being sure, they always suggests PSU units... that in the most cases are way over the real power consumption of the build in question.

You could just find out a good estimate about your build, by reading some reviews from your GPU in question, as that's the part that takes away the most wattage from your PSU, at full load. :)

Derpitron submitter 1 point 29 days ago

I'll be using a Ryzen 5 2400g, so no discrete GPU needed..

mark5916 1 point 28 days ago

Yeah, that makes your build to be compatible with any available PSU on the market.

But keep in mind to get a good quality PSU.

You buy a PSU unit only once (mostly), so a decent one should it be with at least 5 years of warranty.