First time baby build 🥴 HP ProDesk 400 G5

Hi Everyone,

I am new to pc building and pretty clueless, but genuinely love messing around with all the bits.

I am trying to put together a very basic beginner gaming pc. I will only be using it for things like Zenless Zone Zero, Sims, Valorant, and some older games like Thief and the divisive 2008 release of Prince of Persia. (I miss those old games!)

So, what I have is:

HP ProDesk 400 G5 with i5 8500
MSI Radeon RX580

And naturally the power supply of the ProDesk is only 180w, and I think I should have minimum 500w to run the gpu.

But this is where my little brain falls short - I don’t have a lot to spend, and I don’t want to buy the wrong thing. Is it possible to run this gpu on this motherboard!? I think I need the 2 of the 4 pin connectors, and a pci-e connector from the power supply, but I can’t see any that have the right cables - which is fine if all it means is having to get a converter, but I just don’t know!

Help please! :face_exhaling:

I’m in the UK, and would like to stick to a budget of under £50 for the psu.

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350 W would suffice, you may run into issues with HP being special in regards to the pinout and connectors used in the machine though.

Maybe. I had one machine where it would not boot unless that stupid ATI card that came with it was somewhere in it.


Any chance to get some photos of the connectors in question?

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Can probably find HP PSU on ebay that would work and is cheap

Not looking good, could always do 2nd PSU not that its a super good strat

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Which ProDesk do you have, the full tower or slimmer SFF unit?

Unfortunately not for as cheap as a generic budget used ATX PSU, but they do have some in the 200-300w range with PCIe connectors.

They do make adapters, but that may offset the savings of getting an ATX PSU.

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Oh and I have three stripped i7-8700 SFF ProDesks, but I believe that the power supplies are the same as the full towers.

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Hi Everyone,

Thank you for the amazing response!

Here are some pictures of the old HP tower and what I was trying to build the pc into. Already running into a headache with the motherboard not really fitting the standard mounting points :woman_facepalming:t3:
I could only add 2 pics as I’m a new user, so let me know if anything else will be helpful!

The motherboard from the HP machine -

This is the old HP case and the new case I want to build into -

Thanks again for all the help! Honestly if the HP machine is not the right thing to be getting on with then I will try find something more suitable, any advice is appreciated!

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you could just look for a mobo that works with that cpu and it would solve a lot of the problems not sure if there would be one cheap enough tho

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With Dell and HP boxes you tend to be really stuck to their mobo/PSU/case integration. It can be worked around, the effort is likely not worth the pain though.

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Worse thing is I have a Dell SFF and got the HP on recommendation as a replacement… those front panel connectors are integrated on the mobo in a very inconvenient way… :expressionless:

Originally I wanted to build the whole thing from scratch, but was told it wasn’t a good idea (though I’m not sure why not tbh). I spent £160 on the HP, but essentially could take the money and look for the parts and do it that way.

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So, having taken onboard all the bits you awesome ppl have come back with - I decided to nope the HP. Would something like this be a better bet as a starting point:

AMD Ryzen 5 5600G
AMD Wraith Stealth Cooler
Gigabyte A520M S2H
1 TB Kingston NVMe SSD
16GB DDR4 3200 MHz Corsair Vengeance RAM

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Personally not a fan of the display connections on that.
The ASRock B550M Pro4 has HDMI, DP and VGA. Depends on what your monitor(s) have available though.

This does not narrow it down one bit :thinking:

From personal experience:

Type Rating Remark
Kingston NV 1 :neutral_face: Is fine for general purpose software dump, not great with mixed workloads
Kingston KC3000 :smile: Very satisfied with this for medium general purpose use
Kingston DC2000B :+1: Am currently (ab)using one in a Cache application, so far, holding up great!
Kingston DC600M :+1: Have 2 in one of my NAS-boxes, no complaints
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Thank you for the feedback - you make a really good point about the outputs that I hadn’t considered tbh. I have some homework! :sweat_smile:

I was looking at NV2 for the SSD, but only as a start - as I was thinking of this as an upgradeable part for future.

I thought that I would try get the best I can afford for CPU and mobo and settle on cheaper for the rest until I can spend on better bits. I don’t have an issue going for used either - I’m just not very knowledgeable and worried about getting taken advantage of! :blush:

What is the price difference between a KC3000 and NV2 where you are located?

Good plan.

NV2 is around £46 and the KC3000 around £123

For the same capacity?

Yeah, 1TB

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I’m just gonna @wertigon here to suggest a better build on the same price point

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I would swap out the 5600G for any variant of the 5600 that doesn’t have a G in its name, it has half the l3 cache of the standard models

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slap the biggest NVME you can afford, and a 4060 or RX 6500 in there and send it

those are low powered cards that can run what you brung

great machines though

bulletproof and full WIN 11 support

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