CPU & Heatsink Upgrade for my HP ProDesk 600 G4 MT

[BadFulcrum]

Hello Forum,

I have purchased a ProDesk 600 G4 MT and I am wondering if I can upgrade the CPU to a 9th gen i7 to replace my i5 8500. It is my understating that both 8th & 9th gen intel us the LGA1151 socket but I'm not sure if there are any HP imposed limitations to this upgrade. If this is possible, I also seek advice on which i7 model to choose.

Additionally, I have concerns on the the cooling needed to facilitate this upgrade. Does the board in this PC use proprietary CPU heatsink mounting?  If so, what options are available to me?

Also, I have installed an RX 6600 and I feel as if I am already pushing the power capabilities of the 400w PSU. Would upgrading the CPU to a more power hungry option even be feasible?

I have attached an image of what I am working with

[NonSequitur777]

@BadFulcrum,

Welcome to our HP community forum!

Unfortunately, an HP ProDesk 600 G4 MT -even though it has the Intel Q370 chipset which should make this platform compatible for 9th gen processors, HP has made it non-compatible with 9th-gen Intel processors. Btw, this desktop was one of my upgrade projects: https://h30434.www3.hp.com/t5/Desktop-Hardware-and-Upgrade-Questions/Upgrading-to-an-HP-ProDesk-600-..., and you can also see here amongst HP System ProDesk 600 G4 MT Users no 9th-gen processors.

On the bright side, your desktop is compatible with the 8th-gen "K" processors, the best being the i7-8086K and the i7-8700K, which I used.

Next, an RX 6600 has a 132-watt TDP which means that your 400-watt power supply should be quite sufficient to power your system. As a matter of fact, I installed an HP-branded RTX 3060, which has a 170-watt TDP, and even though on paper a 400-watt power supply appears to make this card underpowered, it actually worked out fine for me even with the aforementioned 95-watt TDP processor.

Cooling: yes, it would be helpful to improve the overall airflow through this desktop.  This is what I came up with while I still had the 600 G3 MT motherboard installed -before swapping it with a 600 G4 MT motherboard:

This cooling fan addition/reallocation made my PC run without heating issues.

Hope this was helpful.

Kind Regards,

NonSequitur777

[BadFulcrum]

Thanks for your extensive reply!

I've read your previous thread and found it promising. Could you advise on which of the several heatsinks you've mentioned would best apply to my situation. I've already gone away with the drive cage so space that it would impede on is not an issue.

I'm also keen on attempting the side panel mod you did.

[NonSequitur777]

@BadFulcrum,

I would recommend the 95-watt TDP rated (LGA 1151) heatsink with p/n: 644724-001 "Heatsink - 95W, Kidd".  You can purchase these heatsinks inexpensively (less than $10), such as via this Trusted eBay Seller: ⭐️⭐️⭐️⭐️⭐️ Desktop Cooling Heatsink 644724-001 HP Pavilion P6-2176S 4-Pin | eBay.

The reason why I positioned the rear-chassis cooler to the outside of the case, is to provide space for the additional cooling fan, which is positioned right above the CPU heat sink, blowing air in.

Kind Regards,

NonSequitur777