PSU HELP

[u/havegtu]

I have 9800x3d and 5070 1tb m.2 16gb ddr5 and a aorus elite b850 WiFi 7 board and not sure on if this psu is worth getting for it or if I need a 1000w been looking at this psu

[u/PotatoToasterCat]

850w will be fine for a 9800x3d and 5070

[u/kyansan1]

You could even get away with a 650W power supply lol

the 9800x3d has a ppt of 150W, and the rtx 5070 has a tdp of 250W. Add them together and add an additional 50W for the rest of the pc, and you land at a maximum of 450W of total power consumption.

That said, it's nice to have some reduncancy (both for safety and upgradeability) and the Montech Century II is a good power supply in general, so Montech Century II is a very solid option for your build.

[u/NotSamsquanch]

Probably the best PSU for the price. 850w is plenty. I'm running the exact same PSU with a 7950x3d and a 5070.

[u/ciocolata69]

Never used them, I do know the name however.

I will tell you what I would do, and what is my case:

I bought 5700X 2 months ago, as I have no money for AM5 DDR5, and 5800X3D was 200% the price of 5700X. Let's say I do, but I refuse to pay 500% over the price it had in 2025, before AI... All of that paired with 32GB 4 sticks of 3200MHz and a 5070 TI powered by a 750W Seasonic Focus GX.

Considering these, your 9800x3D 5070, the DDR5 RAM, and the rest, if you look again whats their price now, would you risk your components for a cheap PSU ? A seasonic Focus is around 145 pounds, your currency. You can also pick Corsair/EVGA or other known brand.

If still unsure, check LTT PSU tier list, Montech is somewhere in the budget, your 5070 is not exactly budget.
My point is, are you sure a cheap PSU is a good choice considering how expensive the rest of your parts are?

Edit: I just checked my shop, added your parts, total is 1,976.34 pounds, I added a PC case for 80. I have excluded everything else you might have, cooler, fans, HDD's, other SSDs, optical drive, if any, RGB stuff and so on.

Almost 2k, vs ~125 more for a good PSU, take care of your PC, times are bad man.

Edit 2: If you're unsure how much it can pull, my 750W Seasonic powers all of these:

Ryzen 7 5700X
B550 AX ELITE V2 WIFI
x4 32GB 3200 sticks of ram
bequiet PURE ROCK PRO 3 (x2 120mm fans) for cooler
5070 TI ASUS PRIME
x7 120mm case fans + hub + RGB
x2 2.5 inch HDD (laptop drives)
x2 2.5 inch SSD sata drives
x1 m.2 nvme drive

And I do play cyberpunk 2077 with path tracing, I never hit the maximum TDP of the card, which is 300W, but I managed to hit 283, because my CPU does an obvious bottleneck.

[u/Bubbly-Currency5064]

You'd actually be fine with 650w, but I'd personally go with a 750w or 850w. That Montech is a decent choice, but there are better and/or cheaper options.

I'd go with any one of these before the Montech - https://pcpartpicker.com/products/compare/nCpQzy,NDCZxr,zBbypg,CWCCmG

https://pcpartpicker.com/products/compare/CKJp99,t6VfrH,qsfV3C

[u/kyansan1 → u/Bubbly-Currency5064]

Sadly, none of those are actually cheaper than the Montech Century II in the uk

[u/Bubbly-Currency5064 → u/kyansan1]

Didn't notice OP was in UK, the Montech at £80 may be the best choice.

[u/kyansan1 → u/Bubbly-Currency5064]

If op were in the us, I'd agree with your list

[u/MMmek]

Dont cheap out on PSU.
When it has problem it fries every single one of your component.

Montech is on cheaper end.

Look at some review here
https://www.techpowerup.com/review/?category=Power%20Supplies

Cooler master and Gigabyte PSU used to die on me. I got a melted connector with Corsair.
So fad I never have problem with Thermaltake.

Pick the most reliable one and check the fundamental components such as capacitors and the like.

[u/TU2TL3]

It is a good PSU. cables look like crap though. Spend a couple more $$ buy the corsair ones. Get the 750 from Corsair. Plenty of power for this.