AMD’s Budget RDNA2 For Workstation Solution: Radeon Pro W6400 Review

AMD Radeon Pro W6400 Thumbnail
by Rob Williams on March 21, 2022 in Graphics & Displays

AMD’s latest Radeon Pro workstation-grade graphics card is the W6400, a low-profile offering that doesn’t require a power connector, and is priced at $229. As usual, we’re taking this new card for a spin through a wide-range of workloads, and see how it fits into the overall performance picture.

Page 3 – Rendering: Blender, Radeon ProRender & LuxMark

We’re now going to shift our W6400 performance focus towards rendering workloads. However, we must stress that rendering is not a target scenario of this card, unless we’re talking simpler 3D projects. We could have likely focused this article entirely on viewport testing, but we wanted to be thorough, and truly show you what the card is capable of in all common scenarios.


Blender 3.0.0 - Cycles GPU Render Performance (BMW) (AMD Radeon Pro W6400)
Blender 3.0.0 - Cycles GPU Render Performance (Classroom) (AMD Radeon Pro W6400)
Blender 3.0.0 - Cycles GPU Render Performance (Still Life) (AMD Radeon Pro W6400)
Blender 3.0.0 - Cycles GPU Render Performance (Sprite Fright) (AMD Radeon Pro W6400)

We can glean pretty quickly from these results that the Radeon Pro W6400 shouldn’t be expected to tear through rendering projects. If you care about rendering performance at all, we’d heavily encourage considering splurging for the W6600 instead, or adding a second (gaming) GPU that can be used for dedicated rendering, allowing the workstation GPU to focus squarely on design workloads.

The most interesting result above is with Sprite Fright, a project we weren’t even originally planning to test, because it’s a beefy project outside the scope of what you’d expect a $229 professional GPU to deal with. Somehow, the technically less powerful W6400 placed ahead of the RX 6500 XT, something that was reiterated in subsequent sanity checking. Somehow, the W6400 managed to handle resources well enough to prove faster with that project, while it failed to do the same with the much less complex projects that came before it.

Our EEVEE projects are much less strenuous than our Cycles ones, so the scaling is far more kind to a GPU like the W6400:

Blender 3.0.0 - EEVEE Render Performance (Splash Fox) (AMD Radeon Pro W6400)
Blender 3.0.0 - EEVEE Render Performance (Red Autumn Forest) (AMD Radeon Pro W6400)

The scaling with the Splash Fox project isn’t interesting, and that’s because its rendering involves the CPU about as much as the GPU; all of these interment steps that wait on the CPU reduce the chance of notable scaling. Red Autumn Forest, meanwhile, is the opposite: the CPU is barely utilized, allowing for much more impressive scaling.

Cycles and EEVEE are not the only render engines on the block; let’s check out AMD’s own Radeon ProRender next:

Radeon ProRender

AMD Radeon ProRender Performance - Blender BMW Scene (AMD Radeon Pro W6400)
AMD Radeon ProRender Performance - Blender Classroom Scene (AMD Radeon Pro W6400)
AMD Radeon ProRender Performance - Blender Pavillion Scene (AMD Radeon Pro W6400)

Interestingly, the scaling for a GPU like the W6400 is much more complementary with RPR than it is the other render engines we tested. Clearly, the W6400 is still not a rendering powerhouse; if rendering is really important to you, you owe it to yourself to opt for a faster option.


LuxMark Performance - Food OpenCL Score (AMD Radeon Pro W6400)
LuxMark Performance - Hall Bench OpenCL Score (AMD Radeon Pro W6400)

LuxMark helps wrap up our rendering look, effectively repeating what we’ve seen so far from the others.

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Rob Williams

Rob founded Techgage in 2005 to be an 'Advocate of the consumer', focusing on fair reviews and keeping people apprised of news in the tech world. Catering to both enthusiasts and businesses alike; from desktop gaming to professional workstations, and all the supporting software.

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