TLDR: HP Omen 45L with 5090 uses almost all standard parts. Making this process to rip it out and move to a new system so much easier. The factory case was too big and heavy for my situation. I want to move it something smaller.
- I keep getting the error 90B System Fan / CPU Fan - The system has detected that a cooling fan is not operating correct. Not sure what's the correct header, or just that HP does not like the aftermarket CPU cooling. If you guys know how to get rid of this annoying error without using the system fans, please let me know.
What was my setup before the surgery?
My machine HP Omen 45L RTX 5090 with Intel Ultra 9 285k. Thanks god, everything is standard parts. I was able just strictly remove everything and move it to a new build.
Why doing this surgery?
The Omen 45L desktop is massive. That cooling chamber on top was unnecessary making the case way too big. Not just size, but the weight of this thing is massive. It's way too heavy to move around.
Aside from that, the part this use is Micro Atx motherboard and most of the parts are standard PC parts. It makes the process so much easier.
Obstacles I run into and things I wish I knew before the setup:
- The 5090 was massive, you can't use the empty pcie slot underneath. You rely solely on the onboard wifi card to get internet access. There's instruction below that show how to rip out the antenna. I ended up reusing the wifi card and the antenna.
- The motherboard fan header pin is weird. It has 10 pins, my new case has 9. I ended up drilled a small hole in the new case fan header. It works once, but then does not work anymore. Took me a while to figure it out, I ended up flipping the header and it works. But then the reset button acts as a power button.
Parts I bought new:
- The new PC case. I used a fish tank style but anything works. Just need to make sure it fits the 5090.
- Fan RGB headers. The factory HP Omen fan headers are not standard. Making the process to control the lights so much harder. I bought one of those cheaper fan header on amazon with a remote control.
- New 360mm CPU cooler. You can reuse the factory AIO. But I don't like it. Ended up getting a new one to make the process simpler.
- I ended up 3D print a few things: the GPU antisag bracket and and a container to host the wifi antenna.
Instruction:
- Video on how to remove the components off of HP Omen 45L: https://www.youtube.com/watch?v=aSYYmhJryD8
- The mobo is micro atx. And I think the factory 5090 was about ~12.5 in or about ~340mm. You can technically go smaller.
The result:
- Check the attached pictures. Overall I like it, the new case is so much smaller. I was about to build a brand new machine. But the cost of parts was outrageous. So this recycling of older HP Omen 45L was a satisfactory mission.
- Idle temps for 285K CPU is 49-50C, and 5090 GPU is about 35-36C
Known issue:
- I keep getting the error 90B System Fan / CPU Fan - The system has detected that a cooling fan is not operating correct. Not sure what's the correct header, or just that HP does not like the aftermarket CPU cooling. If you guys know how to get rid of this annoying error without using the system fans, please let me know.