Upgrading GPU and PSU on Elitedesk G4 800 SFF

[reinaldante]

Hi!

I bought a second-hand HP Elitedesk G4 800 SFF. It came with its original 250W PSU. I want to add a graphics card, specifically the Gigabyte GeForce RTX 4060 OC Low Profile 8G. I was reading about its power consumption and I have to get a 500W PSU. The problem is that I can't find the part number for a 500W PSU for this exact model (G4 800 SFF). I thought that the 901759-013 would fit, but it turns out it is for the G4 800 TWR version and in its amazon post, it specifically reads "will not fit in SFF". I have read a lot of posts here, specially from a user called NonSequitur in which he installed another PSU on his computers (a Elitedesk G3 and a G4, among others). There is another PSU (part number L77487-003) that I think in one of his posts said it fits in a G5, being the same size of the G4 SFF. I really need to change the PSU, because the power consumption with the GPU will be higher than the 250 I actually have. 

Do you know if L77487-003 would fit in the Elitedesk G4 800 SFF model? I don't want to cut through the chassis. If not, do you know any other PSU model that would fit? 

Thanks in advance, and sorry for my english (not my first language). 

[NonSequitur777]

@reinaldante,

Welcome to our peer-to-peer HP Community Forum!

Fortunately, I just happened to come across your post.  Btw, I wished this Forum would allow some sort of messaging system, so that I won't miss any posts more or less specifically meant for me... (@JessikaV ?).

You bought a wonderful desktop: powerful and very upgradeable and parts are relatively easy/easier to come by than many other legacy desktops. Also, one of my favorite upgrade projects, before upgrading it to a G5 SFF.

And yes, there are two power supply upgrades possible for your HP EliteDesk 800 G4 SFF, a 400-watt power supply with p/n: 942332-001, (L04618-800) with one 6+2-pin PCIe power cable, and a 500-watt power supply, with p/n: L77487-003 (L89233-001), the latter being equipped with two 6+2-pin PCIe power cables.

Incidentally, if the RTX 4060 low profile card happens to be this model, even the aforementioned 400-watt power supply will do the job, even if you upgrade your processor too.

And yes, the L77487-003 fits just fine in an HP EliteDesk G4 SFF model as I have one of those installed in my desktop (switched from a G3 to a G4 to a G5 SFF motherboard):

In order for an RTX 4060 low profile card to fit, you'll probably have to modify/remove the drives bay, but it can be done.

Kind Regards,

NonSequitur777