this post was submitted on 15 Apr 2025
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Critique my PC build? (au.pcpartpicker.com)
submitted 2 weeks ago by [email protected] to c/[email protected]
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Dad wants a new PC. He's considering spending way-too-much on an Alienware, so I figured I'd build him something better+cheaper.

I've built a couple PCs before, but never anything this high-end or expensive so I'd very much appreciate some feedback from an experienced community.

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[–] [email protected] 7 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

What's your thought on choosing X870 over B850?
Personally I would rather spend that money to upgrade the PSU to a 1000W Seasonic and check for something like Corsair Vengeance or Kingston Fury RAM that runs at 6000 instead of 4800.

edit: For a gaming PC I would recommend 7800X3D or 9800X3D over the Ryzen 7900.

[–] [email protected] 2 points 2 weeks ago (1 children)

What’s your thought on choosing X870 over B850?

the x870 requires pcie5.0 apparently, where the b850 doesn't - figured it'd be more upgradeable for him in the future

Personally I would rather spend that money to upgrade the PSU to a 1000W

pcpartpicker says the build would only be 400W, my understanding is that peak PSU efficiency is at ~50% load, so I went for something in the ~800W range. What benefits might 1000W provide?

7800X3D or 9800X3D over the Ryzen 7900

aside from the igpu, the improvements of those CPUs seems minimal - he's probably not going to be gaming much honestly... but he wants it to be capable

[–] [email protected] 1 points 2 weeks ago

X870 / B850

You can find a B850 with PCIe 5.0 too, so that might be an idea.

PSU

The mentioning of Seasonic was important here, they're known for long lasting and high quality psus which is seen in that they usually offer 10-12 years of warranty compared to gigabytes 1 year warranty.
The 1000W was to future proof, which becomes relevant if the psu is built to be long lasting.
It's a part many brings with them into the next build.

CPU

If he's not gonna use the larger L3 through gaming then the 7900 is more than good enough.
Most games benefits from the L3 and some does so treemendously, f.e. Microsoft Flight Simulator. Here's the difference when the game is cpu bottlenecked: