Evaluated System Configurations

Before we got to evaluating the Gaming Station itself, we first opted to isolate the PowerColor Radeon RX Vega 56 Nano in order to establish its baseline performance as an internal GPU prior to its usage as an eGPU. To this (and to ensure some hardware variety) we tested it inside a couple of systems, starting with a typical high-end desktop configuration from the 2015 time-frame - the sort of system for which consumers tend to upgrade the discrete GPU. Our Custom Haswell DIY build uses an Intel Core i7-4790 in an Asus Z97-PRO Wi-Fi ac ATX motherboard, with the other components outlined in the table below. Regular readers might remember that this system (without the dGPU) was used as a direct-attached storage testbed for Thunderbolt 2 and USB 3.0 external storage devices in the 2014 - 2017 time-frame.

Custom Haswell DIY System
Motherboard Asus Z97-PRO Wi-Fi ac ATX
CPU Intel Core i7-4790
GPU PowerColor Radeon RX Vega 56 Nano
Memory Corsair Vengeance Pro CMY32GX3M4A2133C11
32 GB (4x 8GB)
DDR3-2133 @ 11-11-11-27
OS Drive Seagate 600 Pro 400 GB
Optical Drive Asus BW-16D1HT 16x Blu-ray Write (w/ M-Disc Support)
Chassis Corsair Air 540
PSU Corsair AX760i 760 W
OS Windows 10 Enterprise 1809
Thanks to Asus and Corsair for the build components

We also wanted to get an idea of the card's performance with a relatively modern system. As an internal GPU, the card was also tested in the Shuttle XPC Gaming Cube SZ270R9. Regular readers might recognize this system as one of the comparison points in our second look at the gaming performance of the Hades Canyon NUC. The only difference is the replacement of the NVIDIA GeForce GTX 1070 8GB EVGA Founders Edition with the PowerColor Radeon RX Vega 56 Nano.

Shuttle XPC Gaming Cube SZ270R9
Motherboard Z270-based Shuttle Custom
CPU Intel Core i7-7700K
GPU PowerColor Radeon RX Vega 56 Nano
Memory Kingston Technology HyperX FURY Black HX426C16FB2K2/16
16 GB (2x 8GB)
DDR4-2666 @ 16-18-18-39
OS Drive SanDisk X600 SD9SB8W-256G 256 GB
Chassis Shuttle XPC Gaming Cube
PSU 80 PLUS Silver 500 W (Custom)
OS Windows 10 Enterprise 1809
Thanks to Shuttle for the build components

A note of caution for consumers hoping to use the Radeon RX Vega 56 Nano in the XPC SZ270R9 - the PSU bundled with the Gaming Cube system (500W) can't reliably support the GPU, resulting in random reboots and shutdowns with certain workstation workloads. Using a second PSU to deliver power over one of the two power-pin connectors in the card resolved that issue.

eGFX enclosures complement ultrabooks - while the latter provides portability, the former can give it the extra power needed when GPU-intensive workloads (gaming, say) need to be processed. Most eGFX enclosures also support the power delivery profiles, and the PowerColor Gaming Station is no different. Promising up to 85W of charging capability, the enclosure has no issues keeping ultrabooks juiced up when connected. Our ultrabook platform of choice for the evaluation of the Gaming Station + Radeon RX Vega 56 Nano solution is the Razer Blade Stealth QHD model from 2016 using the Core i7-6500U processor.

Razer Blade Stealth (SKL) eGPU
Motherboard Razer Custom (SKL-U)
CPU Intel Core i7-6500U (15W TDP)
eGPU PowerColor Radeon RX Vega 56 Nano
Memory 8 GB
OS Drive Samsung PM951 MZVLV128HCGR 128 GB
OS Windows 10 Enterprise 1809

eGFX enclosures are also an attractive choice for mini-PC owners. A number of mini-PCs with Thunderbolt 3 are already in the market. Limited upgrade options are often cited as a downside for these systems. The eGFX enclosures take away the GPU part from that equation. We consider two mini-PCs in our evaluation of the eGFX solution - the Zotac MI553 (using a 45W TDP Kaby Lake mobile CPU), and the Intel NUC8i7BEH (Bean Canyon) NUC (using a 28W TDP Coffee Lake-U CPU).

Zotac MI553
Motherboard Zotac Custom (KBL-H)
CPU Intel Core i5-7300HQ (45W TDP)
GPU Intel HD Graphics 630
eGPU PowerColor Radeon RX Vega 56 Nano
Memory G.Skill Ripjaws F4-2133C15-8GRS DDR4
15-15-15-36 @ 2133 MHz
2x8 GB
OS Drive Samsung SSD 950 PRO
(512 GB; M.2 Type 2280 PCIe 3.0 x4 NVMe; 40nm; MLC V-NAND)
OS Windows 10 Enterprise 1809
Thanks to Zotac for the review sample of the MI553, and G.Skill for the RAM

The Zotac MI553 above, as well as the Bean Canyon NUC below, were both also subject to the benchmarks with the integrated GPU activated. This gives readers an idea of the benefits of using a eGFX enclosure to complement their systems.

Intel NUC8i7BEH (Bean Canyon) NUC
Motherboard Intel Custom (CFL-U)
CPU Intel Core i7-8559U (28W TDP)
GPU Intel Iris Plus Graphics 655
eGPU PowerColor Radeon RX Vega 56 Nano
Memory G.Skill Ripjaws F4-3000C16-16GRS DDR4
18-18-18-43 @ 3000 MHz
2x16 GB
OS Drive WD Black 3D NVMe SSD (2018)
(1 TB; M.2 Type 2280 PCIe 3.0 x4 NVMe; 64L BiCS 3D TLC NAND)
OS Windows 10 Enterprise 1809
Thanks to Intel for the review sample of the Bean Canyon NUC, G.Skill for the RAM, and WD for the SSD

Our choice of test systems allows readers to identify workloads that are CPU-limited. In particular, the eGPU configurations are tested with systems having 15W, 28W, and 45W TDP CPUs. These point to typical ultrabook, mini-PC, and notebook systems currently in the market.

Platform Analysis and Bandwidth Implications UL 3DMark and VRMark
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  • piroroadkill - Thursday, February 14, 2019 - link

    I have no idea how manufacturers continue to make external GPU boxes larger than the Dan A4-SFX, which can hold an entire PC.
  • umano - Sunday, February 17, 2019 - link

    I get what you mean, I'd love to build a ghost S1 to acquire video on set and then going back home, plug the eGFX and do the editing/color grade on a proper machine with 2 gpu
  • GNUminex_l_cowsay - Wednesday, February 13, 2019 - link

    Once I saw that the testing was the same GPU with radically different processors, in terms of TDP, it was pretty obvious how the bench marking would turn out. I'd be far more interested in seeing something like different GPUs say RX 560, RX 580, GTX1080ti, the same system connected through internal pcie and then again with eGPU. I don't really care whether such configurations are realistic. I'm just really curious if there are factors like latency and bandwidth involved and how that scales with different levels of GPU performance.
  • BushLin - Wednesday, February 27, 2019 - link

    I would have been happy with just one system tested with the same GPU internally 16x against using the eGPU at 4x.
  • eastcoast_pete - Wednesday, February 13, 2019 - link

    Interesting review, but I missed two points I'd like to know.
    1. Would have loved to see how this enclosure works with any recent, decent NVIDIA card, so a 970 or better/newer. You didn't have one around for that? Doesn't have to be the whole test suite, just some highlights and whether it was any more or less painful to get up and running.
    2. Would have loved to see an internal vs. external dGPU apples-to-apples comparison using the exactly same system with the same CPU, mobo, memory etc. so a true card outside (eGPU) vs. the card(s) inside the PCI-e 8x or 16x slot. Basically, how big is the loss of performance over TB3/4 lanes, all other things being equal? If possible, with the 56 Nano and any NVIDIA card you have lying around. That would have given us a quick heads-up on what to expect.
  • sorten - Thursday, February 14, 2019 - link

    Not sure I understand the request for an NVidia card. Have you experienced problems with NVidia cards inside eGPU enclosures? If you're just interested in bandwidth issues, the Vega 56 is going to show that problem much earlier than the 970 given it's 2x performance advantage.
  • eastcoast_pete - Thursday, February 14, 2019 - link

    No, I haven't. But, with eGPUs still being new-ish, just knowing that this enclosure plays nice with at least one NVIDIA card also would be good to know. I agree that the 970 has lower bandwidth demand than the Vega 56. I mentioned it only as a minimum if tested. What would be more interesting would be a 2070 or better, but not many reviewers have a spare 2070 or 2080 sitting around.
  • dave_the_nerd - Wednesday, February 13, 2019 - link

    I really wish more of these eGPU enclosures would come with an internal SATA bay or two and an HDMI port. I want a gaming dock, dagnammit, and I don't need to be carting around my Steam library when I'm out and about.
  • SirKronan - Thursday, February 14, 2019 - link

    I highly recommend the Gigabyte Gaming Box series. They can be had in 1080, 1070, and RX 580 (8GB) varieties. They are small, have 3.0 ports, display ports, and I believe an HDMI port as well. I am extremely happy with mine.

    Do NOT buy a used one on Amazon, regardless of the condition! Only get a new one. I don't think the testing validation is very thorough at all. They plug it in, it lights up, and I imaging they call it good or "like new" when that happens, and resell it. I am 0 for 2 on used eGPUs, but my new RX 580 Gaming Box is excellent. I'm surprised Anand didn't mention them in this article. It addresses some of the minor gripes of most eGPUs - especially their large sizes.
  • Fiebre - Wednesday, February 13, 2019 - link

    I'd be really interested to see results with more modern GPUs as well.

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