JSAUX Clear Back Shell PC0106b

Review Pages

1. Introduction
2. Retail Package
3. Installation
4. Tests
5. Conclusion

JSAUX has made claims that their backshell does help/improve with the working temperatures of the SteamDeck, at least compared with the default SteamDeck backplate

Our SteamDeck was running:

BIOS 0118 with stock/default options and voltage offsets at 0mV
Windows 11 x64 with all the latest updates and latest possible drivers
SteamDeck Tools v.6.22 installed, with "SteamOS" fan curve to simulate normal SteamOS fan curve
Ambient Temperature via climate control: 27.0 Celsius

In order to stress the device we used the latest available version of the OCCT Enterprise Edition 12.1.5, and we ran the following scenario:

Two minutes idle monitoring
15 minutes full CPU load with the folowing Small/Extreme/Variable/AVX2/0 Mb options
5 minutes idle monitoring

Steam Deck was placed at an aluminum low profile stand to simulate its true use, aka keeping the device in your hands and having all air vents clear.

After the end of each test, we gathered all test results in one table. The test results showed that both JSAUX Clear back shells do improve the overall thermal performance of the SteamDeck, even the new version PC0106b showed even better performance with up to 6 Celsius compared with the stock back shell.

CPU (Tctl/Tdie)	Lowest Temperature	Average Temperature	Maximum Temperature
SteamDeck Stock	44.50	75.68	87.75
JSAUX Clear PC0106	43.75	73.43	85.50
JSAUX Clear PC0106b	42.50	69.58	81.75

Since the OCCT software can gather all measured data, we made a plot for our test run, which is at least interesting. In all cases, the JSAUX Clear PC0106b showed better performance, at least for the CPU (Tctl/Tdie) probe. The graph shows the performance difference between the various back plates, indicating an advantage of the JSAUX Clear PC0106b shell vs the older PC0106 and the stock Steam Deck Shell.

We also took a look at the effective clock CPU speeds, in order to see, if there was any major differences between them, as you can see the PC0106b had the higher average effective CPU clock speeds.

Average Effective Clock	Lowest	Average	Maximum
SteamDeck Stock	198.67 MHz	1908.74 MHz	2996.01 MHz
JSAUX Clear PC0106	135.25 MHz	1915.11 MHz	2911.41 MHz
JSAUX Clear PC0106b	149.53 MHz	1920.31 MHz	2956.99 MHz

We also noticed the total CPU Package Power for any thermal throttling, which isn't present in all backshell configurations.

CPU Package Power	Lowest	Average	Maximum
SteamDeck Stock	2.40 W	11.73 W	16.73 W
JSAUX Clear PC0106	2.30 W	11.74 W	16.97 W
JSAUX Clear PC0106b	2.29 W	11.74 W	16.97 W

As an another test, we used a Bosch GTC400c thermal camera to take measurements of the external front/top/back shell and write down reported temperatures under full load ~ 10.00minutes after test started

Back Panel Shell	Front Glass Panel Center	Front Glass Panel Highest Temp	Top Vent Highest Temp	Top Vent near power	Back Panel Center	Back Panel Highest Temp
SteamDeck Stock	36.90	48.70	63.00	44.30	42.50	55.20
JSAUX Clear PC0106	37.60	47.90	61.80	44.60	40.10	54.80
JSAUX Clear PC0106b	38.70	45.60	52.30	42.50	30.00	56.40