- MODEL: 2018 Dell XPS 15 9575 2-in-1
- DISPLAY: 15.6" IPS 1920x1080 Touch
- CPU: Intel Core I7-8705G CPU @ 3.10GHz (-0.160V Undervolted, Turbo Boost Off)
- VIDEO: AMD Radeon™ RX Vega M GL (4GB HMB2 Graphics Memory)
- RAM: 16GB Dual Channel DDR4 @ 1197MHz (up to 2400MHz)
- SSD: 256GB M.2 PCIe NVMe
- THUNDERBOLT: 2 x 32Gbps Thunderbolt 3
- BIOS: 1.10.0
- OS: Windows 10 Home 64-bit 20H2
- EXTERNAL DISPLAY: 1920x1080 @ 60Hz
- ENCLOSURE: Razer Core X
- CABLE: Razer Stock TB3 Cable
- EXTERNAL GPU: GigaByte GeForce RTX 3090 TURBO @ 1695MHz [2x8pin Power Connector] (GV-N3090TURBO-24GD)
- BIOS: 94.02.26.08.1C
- DRIVER: NVIDIA 457.51
- Inserted card and connected 2x8pin power cables.
- Updated OS and Thunderbolt drivers to latest, plugged in enclosure and installed the latest Nvidia driver, everything worked plug-n-play.
- Undervolted CPU @ 3.10GHz
- Disabled Turbo Bust
- External 1920x1080 @ 60Hz Display
- 24C Ambient Temp
- Closed Razer Core X
- Superposition 1080p Medium - 18841
- Superposition 1080p High - 18537
- Superposition 4K Optimized - 14468
- 3D Mark Fire Strike - 16778
- 3D Mark Time Spy - 10448
- Unigine Heaven Benchmark 4.0 - 5510 [218.7 FPS]
@romchu, Thank you for sharing this build. To confirm these performance results were done through the external monitor? They are lower than I expected for RTX 3090 eGPU. Can you try disable the RX Vega M GL dGPU and internal display to see if there's improvement?
@itsage, yes, all benchmarks done through the external 1920x1080 @ 60Hz monitor. Vega is off in Device Manager. I believe the CPU is bottlenecking. If you see CPU score in 3DMark is kinda low but GPU score is okay for 3090 through TB3.
Thanks for sharing the build. I was worried that the psu inside the core might not be sufficient for the card so to bottleneck. Can you check whether the card is running on a lower wattage so the performance might be able to jump even higher? My 3070 running on a 3440x1440 for 3DMark Timy Spy is only around 7000 points, given the resolution and card difference, that now seems to be reasonable...