XPS 8930, chassis top fan replacement

Thanks!  I will order the Dell 78JPW 120mm fan with bracket from the big site. Seems like the best plug and play option. With this 120mm fan and the upgraded CPU cooler KTDJC Heatsink w/ Fan, and a couple of USB fans by the case, I hope to solve the CPU temps when running Photoshop & lightroom with the new Nvidia 4060.

I hope that's why my 8930 keeps starting up & rebooting with no driver errors but with a "service exception" or "critical process failed" error. I have done all the Dell diagnostics, and the various SFC and DISM with no errors. 

@Hokie_Shankar​   if your XPS 8930 came with the small pancake CPU cooler it may not have included the VRM heatsink, which you will need if you upgrade to the blower style CPU cooler.

XPS 8930 Fan Upgrade

@ProfessorW00d​ : Thank you.  I have ordered this OEM part to replace the small CPU cooler.   Does this require that heat sink? The YouTube video did not mention this VR heat sink. 

This

T57JF KTDJC Heatsink w/ Fan for 95W 65W CPU Dell T3640 T3630 XPS 8910 8920 8930

@Hokie_Shankar​   I think you will need the VRM heatsink. With the small pancake fan, the VRM get air flow as that fan blows down over the CPU heatsink. With the blower style fan, the air is sucked in the top of the blower and forced through the fin stack . . . so minimal air flow for the VRM. I don't think Dell would spend the extra nickle on a heatsink that was not particularly necessary.

XPS 8930 VRM Heatsink

@ProfessorW00d​ : I am upgrading the CPU cooler from the original pancake fan to the version above.

@Hokie_Shankar​   understood . . . that will be a big improvement. You should consider getting the VRM heatsink I linked above.

Today, I upgraded to the blower style cpu cooler and installed the VRM heatsink and for some reason, my CPU is running hotter than this morning before the upgrades. I am hitting upper 90s on all cores for just browsing and all of them are running at 4288Mhz frequency.

All the fans are functional.

Yes: I did use thermal paste between the cooler block and the CPU. 

I am confused

Did you clean old thermal paste off top of CPU? 

Decent quality thermal paste?

Too little/too much thermal paste?

New heat sink properly seated and locked in place?

@RoHe​ 

Did you clean old thermal paste off top of CPU? 

Yes. I also cleaned the pad that came attached to the heat sink

Decent quality thermal paste?

Yes. Arctic MX-4

Too little/too much thermal paste?

I don't know the exact amount, but not in excess

New heat sink properly seated and locked in place?

Yes. I loosened and retightened

Temps. seem to be settling down. Prior to posting my last message, the CPU temps would spike to 100 Celsius and both the CPU and Top fan went nuts just booting up and when I opened Chrome.

It is now one hour later and I get an occasional spike and temps cool down rapidly. Maybe it was the thermal compound beginning to work? IDK.

The new blower fan is LOUD!

@Hokie_Shankar​   something is amiss . . . the blower fan should be very quiet; unless your CPU is 100C

maybe consider re-pasting??

drop some photos so we can see your new mod

@ProfessorW00d​  Right now all is quiet in the office. An occasional burst of fan when I edit an image in Lightroom. Temps are  reasonable for CPU and GPU

@Hokie_Shankar​   those CPU temps still look a little high to me for a 65 watt processor at idle

how do the temps compare to what you were seeing before the mod?