In search of the optimal card for my eGPU case I looked for tests for a long time, but unfortunately I could never find anything adequate, where a direct comparison between Radeon and GeForce graphics cards was made as well as one could explain how overclocking affects an eGPU, up to which performance class an eGPU scales reasonably at all due to the limitation by the TB3 connector. It’s all the little details that were always missing like information about what drivers, hardware, connectivity are ideal and what probably definitely won’t fit.
All of these issues had not been sufficiently illuminated to me. So what do you do? You take it into your own hands and build such a graphics card cage yourself!
|Laptop:||HP Spectre x360 15 Convertible, UHD touch panel 60 Hz|
|CPU:||Intel i7 8705G (4 cores / 8 threads) optimized @ 3.7 GHz Allcore, 4.1 GHz Singlecore|
|Ram:||16 GB DDR4 @ 2400 MHz CL 17|
|Graphics Cards:||GeForce RTX 3070 MSI Gaming X Trio||@TB3 Razer Core X||Driver 461.11|
|GeForce RTX 3060 Inno3D Twin X2 OC||@TB3 Razer Core X||Driver 461.11|
|ASRock Radeon RX 6700 XT Reference||@TB3 Razer Core X||Driver 21.3.2|
|MSI RX 5700 XT Mech OC||@TB3 Razer Core X||Driver 20.4.1|
|OnBoard Vega M GL OC||@ 1020/930 8×3.0||Driver 20.4.1|
|Tweaks:||Laptop CPU/GPU with liquid metal, Core X case with silent mod and lighting.|
The test system I had already looked at here in more detail:
Reading tip: Remedy when the notebook throttles: Intel CPU and AMD graphics meet for a joint siesta in the HP Spectre
In the meantime, of course, I have made some small changes. For this test I think the performance data of the system is enough to estimate the test base, so if you are interested in it take a look at the screens. The Core X case is very spacious and actually accommodates almost any modern GPU. With 650 watts of power, it can even handle upper-class cards. More than 2x 8 pin is not possible, which is why I could not include a RTX 3080 in the test series, since I only have a ROG White here.
Core X Mod
Since the fans of the Core X case annoyed me a bit, especially the power supply fan which makes an annoying clattering noise even in standby, I modded the case a bit. Since I do not like to describe work on a power supply here, I let the pictures speak for themselves and explain only briefly what I have replaced. If anyone is interested in the rebuild, feel free to write me here on the forum.
The side fan was replaced with a fully rubberized 120 mm NB Silentloop and is now inaudible at 6 V. I also replaced the power supply fan after a small odyssey, I had massive problems with the startup speed that the power supply connector outputs. I then ran the cable out of the power supply and connected it to the header of the board via a Y-adapter. Disadvantage here, if the case in standby now charges my laptop, the fan does not run in the power supply! However, since Thunderbolt delivers a maximum of 100 watts, I don’t see this as critical, the device is charged in a maximum of 1 hour anyway. I tried 4 fans and none started reliably. Anyone with a tip for me here, feel free to drop me a line in the comments. I left the 2 pin to 3 pin adapter installed just in case.
After some dry runs to see if everything works as it should, I also started an optical upgrade. A simple battery-powered RGB header with controller lets the Core X now shine in new splendor and the MSI Trio makes directly again a chicer figure. The construction diary in pictures: