AMD Radeon PRO W6400 vs NVIDIA Quadro M5000 Comparison

The Verdict

The data is unambiguous: the AMD Radeon PRO W6400 is the faster card in this comparison. It wins both recorded head-to-head benchmarks, taking Geekbench OpenCL by 18.8% and Geekbench Vulkan by 19.3%. The average benchmark score tells the same story: the AMD card averages 37,157 points, which is 19.0% higher than the NVIDIA Quadro M5000's 31,206. The percentile ranking also favors AMD, with the PRO W6400 sitting at the 80th percentile of all GPUs versus the M5000's 76th.

The AMD card is the clear choice for anyone running OpenCL or Vulkan workloads, which are the two benchmark categories recorded. Its wins are not marginal; they are consistent double-digit advantages across both APIs. The NVIDIA card, despite having twice the memory capacity, more shading units, and a wider memory bus, simply does not convert those resources into higher scores in these tests. The verdict is simple: if the workload is covered by the two recorded benchmarks, the AMD Radeon PRO W6400 is the superior product.

However, the Quadro M5000 retains a niche for specific use cases. Its 8 GB of VRAM is double the AMD card's 4 GB, and its 256-bit memory bus delivers 211.6 GB/s of bandwidth versus 128.0 GB/s. For tasks that are memory-capacity bound or bandwidth sensitive, the NVIDIA card has a structural advantage that raw compute benchmarks do not capture. The M5000 also has a wider physical footprint (dual-slot, 267 mm long) and consumes 150 W versus 50 W, which suggests it was built for a different class of workstation. The data does not show the M5000 winning any benchmark, but its memory subsystem is the only area where it leads.

Choose the AMD Radeon PRO W6400 for raw compute performance, newer architecture, and efficiency. Choose the NVIDIA Quadro M5000 only if the workload specifically demands more than 4 GB of frame buffer or if the application is known to favor NVIDIA's memory architecture, despite the benchmark evidence showing it loses in both recorded API tests.

Architecture Differences

The two cards represent fundamentally different design eras. The AMD Radeon PRO W6400 is built on the Navi 24 chip using RDNA 2.0 architecture, fabricated on a 6 nm process at TSMC. The NVIDIA Quadro M5000 uses the GM204 chip with Maxwell 2.0 architecture, also from TSMC but on a much older 28 nm node. This process gap explains the transistor density difference: AMD packs 50.5 million transistors per square millimeter (5,400 million total on a 107 mm² die), while NVIDIA manages only 13.1 million per square millimeter (5,200 million total on a 398 mm² die). The AMD chip is physically smaller but packs more transistors per area.

The compute layouts are inverted in scale. The NVIDIA card has 2,048 shading units, 128 texture mapping units, and 64 render output units. The AMD card has 768 shading units, 48 TMUs, and 32 ROPs. Despite having 2.7 times the shading units, the M5000 only achieves a 19.2% higher FP32 peak (4.252 TFLOPS versus 3.565 TFLOPS). The clock speeds explain this: AMD runs at 2039 MHz base and 2321 MHz boost, while NVIDIA runs at 861 MHz base and 1038 MHz boost. The AMD architecture extracts far more work per shading unit per cycle.

Memory architecture differs sharply. AMD uses 4 GB of GDDR6 on a 64-bit bus, delivering 128.0 GB/s. NVIDIA uses 8 GB of GDDR5 on a 256-bit bus, delivering 211.6 GB/s. The NVIDIA card has more capacity and bandwidth, but AMD's memory runs at 16 Gbps effective versus NVIDIA's 6.6 Gbps effective. The AMD card compensates for its narrow bus with much faster memory clocks.

Feature support diverges on modern APIs. The AMD card supports DirectX 12 Ultimate (12_2), which includes hardware ray tracing via 12 dedicated RT cores. The NVIDIA card only reaches DirectX 12 (12_1) and has no RT cores. Both support OpenGL 4.6 and Vulkan 1.4. The AMD card also lists FP16 at 7.130 TFLOPS with a 2:1 ratio, while the NVIDIA card has no recorded FP16 capability. The bus interface also differs: AMD uses PCIe 4.0 x4, while NVIDIA uses PCIe 3.0 x16.

Power and physical design reflect the performance approach. The AMD card is a 50 W single-slot board with no power connectors and a 250 W suggested PSU. The NVIDIA card is a 150 W dual-slot board requiring one 6-pin connector and a 450 W suggested PSU. The AMD card is dramatically more power-efficient, delivering near-parity FP32 performance at one-third the power draw. Display outputs also differ: AMD offers 2x DisplayPort 1.4a, while NVIDIA offers 1x DVI and 4x DisplayPort 1.2.

Head-to-Head Benchmarks

The recorded data shows two clear victories for the AMD Radeon PRO W6400. In Geekbench OpenCL, the AMD card scores 35,027 against the NVIDIA's 29,481, a delta of 18.8%. In Geekbench Vulkan, the AMD card scores 39,286 against 32,931, a delta of 19.3%. The AMD card wins both tests, and the Vulkan advantage is slightly larger than the OpenCL advantage.

These results are notable because the NVIDIA card has more raw hardware. The M5000 has 2,048 shading units, 128 TMUs, and 64 ROPs, all of which are higher than the AMD card's 768 shading units, 48 TMUs, and 32 ROPs. The NVIDIA card also has a higher FP32 peak at 4.252 TFLOPS versus 3.565 TFLOPS. Yet the AMD card outperforms it in both recorded workloads. The data suggests that the RDNA 2.0 architecture, with its higher clocks (2321 MHz boost versus 1038 MHz) and newer instruction set, more than compensates for the lower hardware count.

The average benchmark score confirms the head-to-head results. The AMD card averages 37,157 points across the two tests, while the NVIDIA card averages 31,206. The nearest rivals for the AMD card include the NVIDIA GeForce RTX 4070 (average 37,648, delta -1.3%) and the AMD Radeon RX Vega 56 (37,507, delta -0.9%), placing it in solid mid-range company. The NVIDIA card's nearest rivals include the NVIDIA GRID M60-1Q (31,220, delta 0%) and the NVIDIA TITAN RTX (31,676, delta -1.5%), showing it sits at a lower performance tier.

The individual benchmark deltas (18.8% and 19.3%) are larger than the average score delta (19.0%), which means the AMD card's advantage is consistent across both APIs. There is no single test where the NVIDIA card closes the gap. The data shows a uniform performance lead for AMD, not a workload-dependent one.

FAQ

Q: Which card has a higher average benchmark score?

A: The AMD Radeon PRO W6400 averages 37,157 points, which is 19.0% higher than the NVIDIA Quadro M5000's 31,206.

Q: Does the NVIDIA card win any head-to-head benchmark?

A: No. The AMD card wins both recorded tests: Geekbench OpenCL by 18.8% and Geekbench Vulkan by 19.3%.

Q: How do the memory capacities compare?

A: The NVIDIA Quadro M5000 has 8 GB of GDDR5 memory on a 256-bit bus with 211.6 GB/s bandwidth. The AMD Radeon PRO W6400 has 4 GB of GDDR6 memory on a 64-bit bus with 128.0 GB/s bandwidth.

Q: Which card supports ray tracing?

A: The AMD Radeon PRO W6400 has 12 dedicated RT cores and supports DirectX 12 Ultimate (12_2). The NVIDIA Quadro M5000 has no RT cores and supports only DirectX 12 (12_1).

Q: What are the power requirements for each card?

A: The AMD Radeon PRO W6400 has a 50 W TDP, no power connectors, and a 250 W suggested PSU. The NVIDIA Quadro M5000 has a 150 W TDP, one 6-pin connector, and a 450 W suggested PSU.

Q: Which card is newer and on a smaller process node?

A: The AMD Radeon PRO W6400 is on a 6 nm process and was released in January 2022. The NVIDIA Quadro M5000 is on a 28 nm process and was released in June 2015.

Where Each One Wins

The AMD Radeon PRO W6400 wins in every recorded compute benchmark. It takes Geekbench OpenCL with a score of 35,027 versus 29,481, and Geekbench Vulkan with 39,286 versus 32,931. Its average benchmark score of 37,157 places it at the 80th percentile of all GPUs, and its nearest rivals include the NVIDIA GeForce RTX 4070 (delta -1.3%) and the NVIDIA Tesla P4 (delta -1.3%). This makes it the choice for general compute workloads, especially those using Vulkan, where its lead is largest at 19.3%.

The AMD card also wins on efficiency and physical footprint. It is a 50 W single-slot card with no power connectors, while the NVIDIA card is a 150 W dual-slot card requiring a 6-pin connector. The AMD card's 6 nm process and 107 mm² die size (versus 398 mm²) make it far more compact and power-lean. Its 2321 MHz boost clock and 16 Gbps effective memory speed are modern strengths that the older NVIDIA card cannot match.

The NVIDIA Quadro M5000 wins only in specific memory-related specifications. It has 8 GB of VRAM versus 4 GB, a 256-bit bus versus 64-bit, and 211.6 GB/s bandwidth versus 128.0 GB/s. These are structural advantages for workloads that exceed 4 GB of frame buffer or that are heavily bandwidth-bound, such as large texture datasets or multi-display 4K compositing. Its 2,048 shading units and 128 TMUs also give it higher theoretical texture rate (132.9 GTexel/s versus 111.4 GTexel/s) and a higher FP32 peak (4.252 TFLOPS versus 3.565 TFLOPS), though these do not translate into benchmark wins.

The M5000 also has a wider physical interface: PCIe 3.0 x16 versus PCIe 4.0 x4, which may matter for legacy systems. Its 1x DVI plus 4x DisplayPort 1.2 output set is more varied than AMD's 2x DisplayPort 1.4a, though the AMD outputs support a newer standard. For users with older monitors or DVI-based setups, the NVIDIA card offers direct connectivity without adapters.

Specification Differences

The two cards differ on nearly every recorded specification. The AMD Radeon PRO W6400 uses the Navi 24 chip on RDNA 2.0 architecture, while the NVIDIA Quadro M5000 uses GM204 on Maxwell 2.0. The process nodes are 6 nm versus 28 nm, both from TSMC. The AMD chip has 5,400 million transistors on a 107 mm² die (50.5M / mm²), while the NVIDIA chip has 5,200 million transistors on a 398 mm² die (13.1M / mm²).

Clock speeds: AMD runs at 2039 MHz base and 2321 MHz boost; NVIDIA runs at 861 MHz base and 1038 MHz boost. Memory clocks: AMD at 2000 MHz (16 Gbps effective), NVIDIA at 1653 MHz (6.6 Gbps effective). Memory configuration: AMD has 4 GB GDDR6 on a 64-bit bus with 128.0 GB/s; NVIDIA has 8 GB GDDR5 on a 256-bit bus with 211.6 GB/s.

Compute units: AMD has 768 shading units, 48 TMUs, and 32 ROPs; NVIDIA has 2,048 shading units, 128 TMUs, and 64 ROPs. AMD adds 12 RT cores; NVIDIA has none. Pixel and texture rates: AMD at 74.27 GPixel/s and 111.4 GTexel/s; NVIDIA at 66.43 GPixel/s and 132.9 GTexel/s. FP32: AMD at 3.565 TFLOPS; NVIDIA at 4.252 TFLOPS. AMD lists FP16 at 7.130 TFLOPS (2:1); NVIDIA has no FP16 figure.

Power and physical: AMD is 50 W, single-slot, no power connectors, 250 W suggested PSU; NVIDIA is 150 W, dual-slot, one 6-pin connector, 450 W suggested PSU. NVIDIA's length is 267 mm (10.5 inches) and height is 111 mm (4.4 inches); AMD lists no dimensions. Bus interface: AMD PCIe 4.0 x4; NVIDIA PCIe 3.0 x16. Display outputs: AMD 2x DisplayPort 1.4a; NVIDIA 1x DVI and 4x DisplayPort 1.2.

API support: AMD DirectX 12 Ultimate (12_2), OpenGL 4.6, Vulkan 1.4; NVIDIA DirectX 12 (12_1), OpenGL 4.6, Vulkan 1.4. Release dates: AMD January 2022, NVIDIA June 2015. Both are end-of-life. AMD's predecessor is Radeon Pro Vega, NVIDIA's is Quadro Kepler. NVIDIA has a successor (Quadro Pascal); AMD has none recorded.