I have basically the same system albeit with the 2060, and temps are absolutely a big problem under load. The choice of heatsink used on the non-K models is ridiculous. My 8 year old Ivy Bridge HP prebuilt has three times the cooler. With the pitiful heatsink Dell specs on the non-K G5 (which is not at all what is advertised in their website photos) my idle/desktop browsing temps were respectable (30-40C, within the range of my i7-3770), any moderate CPU load brings temps into the 70-80C range. Loading the 10700F with a modern game or benchmark will bring temps into the high 90s. Geekbench will hit thermal throttling at 99C. Not acceptable. Stock fans are screaming at these temps, to the point that I can't hear what I'm playing with my over ear G933 Logitechs on. It's like they raised a parts bin of surplus i3 coolers and didn't bother to even so much as benchtest the bloody thing after the engineering department slapped their prototype together. GPU temps were lower than CPU but still cresting 80+ at stock clock speeds which, again, is unacceptable in something marketed as a gaming PC. The bad news is that the thermal compound was applied perfectly so this was not the issue. I had some spare Arctic Silver 5 so I applied it hoping to buy some time until I could figure out a cooling solution. No dice. Idle temps were lower so it was actually helping but the tiny stock heatsink just doesn't have the thermal capacity to keep this chip cool. The other bad news is that the G5 does not adhere to the Intel reference cooler spec; the backing plate that is removable on other LGA11xx/12xx boards is built into the back side of the G5 case. The good news is that you can make most aftermarket coolers fit without altering anything; you just have to get creative with hardware. I used a Noctua NH-U9S after reading another forum thread here as the poster said he was able to use one set of the spacers included in the cooler hardware to mount it. All he needed to source was some M3x15 (3mm thread, 15mm long) machine screws. I also ordered a second NH-A9 PWM fan to attach to the back side of the cooler for push-pull airflow. They attach with the included y-splitter to the CPU fan pins, and do not give me any bios or hardware errors. I left the stock rear dancing place to vent airflow out the back. Idle temps are a little lower (high 20s, but it's cool in my house this time of year) but my system doesn't break 65C under full prime95 torture test load now. I didn't even try to run P95 with the stock cooler because I didn't want to burn my house down haha. The included NT-H1 thermal paste was very easy to apply, and I "tinted" the cooler and CPU cover with some first after cleaning up the Arctic Silver to be sure of a proper application. I'm quite satisfied with the G5 otherwise. I am more than a little miffed that a $1200 "gaming" PC needs me to spend another $90 on something that is inherently required (imagine buying a new VW GTi only to find out it has tractor tires on it from factory). Dell really, really dropped the ball here.  If you need any help just let me know. I'm on mobile but I got all my info from a G5 forum post right here on the Dell forums. Good luck!
So I recently bought a G5 gaming desktop, and I started reading some posts saying that the desktop has overheating issues, and some people overcame these overheating issues by modding the case. So I'm kind of scared if I bought something that will just eventually die due to thermals. How true are these posts about the G5 desktop overheating, and how can I mitigate these issues without making mods? My config is: i7 10700F 16 GB ram RTX 2070 Super 256gb SSD + 1 TB HDD
Inspiron G5 5090, thermals