XPS 15 9550 temperature observations (undervolt + repaste)

I had a couple of hours to mess around with the XPS 15 9550 in my sig (i5 version) and decided to see what temperatures I was hitting. I tested it under Prime95 small fft's for 20 minutes and looked at the average temperature. I tested it first with all stock settings/paste and then undervolted by 185mv (a setting that is prime stable for me). After that I repasted the cpu and gpu with IC Diamond thermal paste, tried it at stock voltage, and then undervolted again.

Here are the results

Stock - 73*C
Undervolt by 185mv - 59*C
Stock voltage with repaste - 68*C
Repaste and undervolt by 185mv - 53*C

One good thing with the undervolt is the fans were also able to run at a step slower - reducing noise output by a fair amount. The undervolt and repaste again allowed the fans to step down again, producing the best results.

Another thing I looked at was my 950pro SSD. My laptop came with the 32gb cache drive, so it did not have the thermal pad. Using AIDA64 I was idling at 40*C and hitting 63*C in ATTO. I put some 2mm thermal pad between the SSD and the bottom case and now it idles at 29*C and hit 39*C in ATTO. A fairly good reduction I'd say.

Figured I'd throw up some results for you guys. I wanted to get some GPU temps (before and after repaste), but I didn't have enough time.

*ON EDIT*
So I have had a couple of people ask me to do a repasting how-to so here is a brief one:

1. Get your laptop and tools ready. You will need a phillips screwdriver, T5 driver, something to clean the old thermal paste off (I like arctic clean), new thermal paste (recently tried and absolutely love kryonaut thermal grizzly).

2. Remove the back cover of your XPS 9550.

3. Unplug the battery cable (carefully).

4. Remove the heatsink. See how wonderful of a job dell does at pasting...

5. Remove old paste making sure to clean it well and not get it on anything else.

6. Apply a small line of paste to the cpu and gpu. Note that this application doesn't look very good and it may be difficult to see how much I applied. It's always a good idea to do a trial fit where you apply it and seat the heatsink and then take it off to see how well the application went (you have to clean it and reapply after that though). You can also see that I changed the thermal pad under the heat pipe to one that is around 1.5mm thick because the stock pad did not come near touching the ram chip.

7. Reinstall the heatsink, plug in the battery cable, put the back of the case on...

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XPS 15 9550 temperature observations (undervolt + repaste)