Dell Precision 7540 and 7740 Owner's Thread

I don't see any temperatures worth worrying about on the drives in those screenshots. The GPU temperature on the other hand is quite high and past the normal thermal throttle limit.

I am also suspect of the NGFF event report. There might be something else listed in the Dell bios thermal event log.

 

GPU temperature in the upper 80's seems safe to me. I routinely push my Quadro M5000M up into that range with no trouble. (It hits the power limit before it can go any higher.)

 

I've never seen my RTX 4000 anywhere near 87c because like yours, it will power throttle before going that high. This machine is still 25W from the power limit but already well above the normal temperature where mine will start reducing GPU boost clocks.

 

Any breakthroughs on bumping the ram speed to 3200 mhz without XMP? I've been keeping an eye on the forum since purchasing my 7540 awhile back but haven't seen anything definitive. I currently have 64gb (4x16) of Crucial Ballistix 3200 mhz currently installed and running fine at 2667 mhz, but would love to see some higher speeds if possible. My 7540 has the Xenon E-2286M, RTX 5000, & Evo 970 SSD's.

 

Hi all,
What height of thermal pads is needed for 7540? I'd like to repaste mine when it arrives. Planning to use Kryonaut and pads from Thermal Grizzly, but they come in different thicknesses.

 

Happy Monday, similar to @ov_Darkness, I too have recently ordered a 7540, with the Quadro RTX 5000 included. From Dell, the GPU thermal pad dimensions are: 16.6 x 13.0 x 0.2 cm (or: 166 x 130 x 2 mm), when asked about the W/mK, all they could give was that it had a heat dispersion rating for their stock pad is 129°F. What does that convert to in W/mK? Also, they couldn't find any information on the VRAM thermals, so does anyone happen to know those specs? Lastly, are there any other parts that would benefit from adding thermal pads to them (e.g. VRMs), and what thickness and W/mK pads should I get for them?
Cheers!

 

@ov_Darkness and @Baiano42:
I feel like there will be little to no benefit in re-padding the GPU VRAM and VRM modules, as the GPU itself is massively power limited (Max-Q RTX 5000, power-rated at 80 W). If you want to beef up the cooling, the GPU and friends have plenty of that—the CPU side is far more anaemic with regards to this, and you might consider focusing on that instead. I have an image of the heatsink and the thermal pads, as provided, stock:


Blue are VRAM, pink are MOSFETs and VRMs. The GPU area generally gets plenty of cooling.

 

@Ionising_Radiation, thank you for your reply and image, that is most helpful. Regarding you comment:

I will be using the Thermal Grizzly Kryonaut for my paste, besides that, what additional mods would help with improving it's performance? (If it helps, I have the 9th gen i9)

 

7540 just gets 9th gen CPUs. You can undervolt them. (Later BIOS versions remove this capability but apparently it is back after resetting the BIOS settings to default.) That will improve temperatures. You cannot undervolt 10th gen CPUs in the 7550, so repasting is really the only option to lower the temperature.

Dell sounds really confident that the new thermal paste that they switched to (in 2019?) is competitive with third-party offerings. This is from the excellent interview series recently posted (first part here). I'd love to see someone do detailed measurements to see if this is true, but if it is, the benefit from repasting will be minimal at best.

 

Thanks for the link. Based on the interview, Dell is using Shin Etsu 7921 6W/mk (specified only for Alienware or Inspiron, didn't mention full stack). Based on that, I still feel good about going ahead and re-pasting with Kryonaut.