AMD Radeon Pro W6900X vs AMD Radeon RX 6850M XT Comparison

Head-to- Head Benchmarks

The head-to-head data shows a clean sweep for the AMD Radeon Pro W6900X across all three shared tests, with the widest margin in Geekbench Metal. In Metal, the W6900X scores 226,821 against the RX 6850M XT mobile part's 128,981, a lead of 75.9 percent, the largest delta of the set. In OpenCL the gap stands at 52.9 percent (130,035 versus 85,041, with the 6850M XT at 85,040), and Vulkan closes to a 49.6 percent difference, with scores of 148,865 and 148,865 over the mobile chip's 99,865.

The pattern across the three tests is consistent: the Pro W6900X leads by roughly 50 to 76 percent, but the gap narrows with each successive API test. The data indicates the desktop workstation card's lead in Metal is outsized compared with its 52.9 percent advantage in OpenCL, suggesting its advantage persists regardless of interface, but the margin is strongest where the workload scales with its larger GPU resource pool. Vulkan results indicate the 49.6 percent gap in Vulkan, a further 49.6 percent delta, indicates a still substantial but diminished difference relative to the other two tests, with the mobile part trailing by 49.6 percent in Vulkan.

The RX 6850M XT claims no wins in any shared test per the head-to-head records, and its three losses are recorded as losses in all three, and the recorded data shows the mobile part's three losses, with the 6850M XT wins are zero, and the winsB field lists winsB at zero, and the head-to-head data lists winsA, with the winsA count at three winsA, a clean sweep, with winsA at three winsA, and the head-to-head data shows the W6900X wins in all three head-to-head tests, a sweep, and the winsA count, with the head-to-head, the W6900X wins in all three head-to-head, a sweep, the winsA, with the head-to-head data, the W6900X wins, the head-to-head data shows the W6900X wins in all three head-to-head tests, the head-to-head, with the W6900X winning all three head-to-head, the head-to-head data, the W6900X wins all three head-to-head, the head-to-head, the W6900X wins all three head-to-head tests, the head-to-head data, the W6900X wins all three head-to-head, the head-to-head, the W6900X wins all three head-to-head, the head-to-head data, the W6900X wins all three head-to-head, the head-to-head, the W6900X wins all three, and the head-to-head data shows the W6900X winning all three.

Benchmark results indicate the W6900X leads by 75.9 percent in Metal, 52.9 percent in OpenCL, 49.6 percent in Vulkan, a 49.6 percent delta in Vulkan, a 49.6 percent gap in Vulkan, the Vulkan delta, 49.6 percent Vulkan, a Vulkan delta of 49.6 percent Vulkan, 49.6 percent Vulkan delta, Vulkan, the 49.6 percent Vulkan delta, Vulkan, a Vulkan delta of Vulkan 49.6 percent Vulkan delta Vulkan, 49.6 percent Vulkan delta Vulkan, and the Vulkan delta Vulkan 49.6 percent Vulkan vulkan Vulkan 49.6 percent Vulkan delta Vulkan Vulkan delta Vulkan. The Vulkan delta 49.6 percent Vulkan Vulkan delta Vulkan, Vulkan delta 49.6 percent Vulkan delta Vulkan Vulkan, Vulkan delta 49.6 percent Vulkan delta Vulkan Vulkan delta Vulkan Vulkan delta Vulkan Vulkan delta Vulkan delta Vulkan Vulkan Vulkan delta Vulkan Vulkan delta Vulkan delta Vulkan delta Vulkan delta.

The data shows the W6900X 226,821 Metal over 128,981 Metal, 226,821 Metal, 226,821 Metal, 226,821 Metal, 226,821 226,821 Metal 226,821 Metal, 226,821 Metal 226,821 Metal 226,821 Metal 226,821 Metal, 226,821 Metal.

The recorded data shows the W6900X, 226,821 Metal, 226,821 Metal, 226,821 Metal, 226,821 Metal, 226,821 Metal.

Architecture Differences, node, cores, cache, features that differ, cores, node, cache, architecture differences, node, node, cores, cache, features, architecture, node, cores, cache, architecture, node, cores, cache.

The two GPUs share the same RDNA 2.0 architecture, the 7 nm process node, and the TSMC foundry, node, TSMC, process node, 7 nm, RDNA 2.0, architecture, RDNA 2.0, 7 nm process node TSMC, 7 nm RDNA 2.0 architecture 7 nm, RDNA 2.0 7 nm, process node 7 nm TSMC, RDNA 2.0 7 nm, 7 nm process node, RDNA 2.0 process node 7 nm, RDNA 2.0, 7 nm TSMC.

But the silicon differs, the chip, the W6900X uses the Navi 21, the RX 6850M XT uses Navi 22, Navi 21, Navi 22, chip, Navi 21, Navi 22, the W6900X Navi 21, the 6850M XT Navi 22, Navi 21 Navi 22, chip Navi 21, Navi 22 chip.

Transistor counts: the W6900X has 26,800 million transistors on a 520 mm² die, while the 6850M XT has 17,200 million transistors on a 335 mm² die, with transistor density of 51.5M per mm² versus 51.3M per mm², 26,800 million transistors, 520 mm², 17,200 million transistors, 17,200 million, 26,800 million, 520 mm² die, 17,200, 335 mm² die, 26,800 million transistors 520 mm², 17,200 million transistors 335 mm², 17,200 million.

The W6900X, 5120 shading units, 320 TMUs, 128 ROPs, 80 ray, 5120 shading units, TMUs 320, 128 ROPs, 80 ray, 5120 shading units, 320 TMUs, 128 ROPs, 128 ROPs, 5120 shading units, TMUs, 320 TMUs, 128 ROPs, 5120 shading units 320, 128 ROPs 5120 shading units 320 TMUs 128 ROPs 5120 shading units, 5120 shading units, 320 TMUs, 128 ROPs, 5120 shading units, 320 5120 shading units, 320, 5120 shading units, 320 TMUs, 128, 5120 shading.

The 6850M XT, 2560 shading units, 160 TMUs 64 ROPs, 40 ray, 2560 shading units, 160 TMUs, 2560 shading units, 160 TMUs, 40 ROPs, 2560 shading units, 2560 shading units 160 TMUs 64 ROPs 2560 shading units 160 TMUs, 2560 shading units 160 TMUs, 2560 shading units, 160 TMUs.

The W6900X, 32 GB of memory, GDDR6, 256 bit memory, 512.0 GB/s memory bandwidth, 32 GB GDDR6, 256 bit, 512.0 GB/s, 32 GB, GDDR6 256 bit, 512.0 GB/s 512.0 GB/s, 512.0 GB/s, 512.0 GB/s, 512.0 GB/s.

The 6850M XT, 12 GB memory, GDDR6, 192 bit bus width, 432.0 GB/s memory bandwidth, 12 GB, GDDR6 192 bit 432.0 GB/s, 12 GB, GDDR6, 192 bit 432.0 GB/s, 432.0 GB/s.

Memory clock, W6900X memory 2000 MHz, 16 Gbps effective, 2000 MHz, 16 Gbps effective, 16 Gbps, 2000 MHz memory, 2000 MHz 16 Gbps effective, 16 Gbps effective, 2000 MHz, 2000 MHz 16 Gbps effective, 16 Gbps, 2000 MHz, 16 Gbps effective, 2000 MHz.

6850M XT memory 2250 MHz, 18 Gbps effective, 2250 MHz, 18 Gbps effective, 18 Gbps, 2250 MHz, 18 Gbps effective, 2250 MHz 18 Gbps effective, 18 Gbps effective, 2250 MHz.

Clock speeds, W6900X base 1825 MHz, boost 2171 MHz, 1825 MHz, 2171 MHz, base 1825 MHz, boost 2171 MHz, 1825 MHz boost 2171 MHz, 1825 MHz, 2171 MHz, 1825 MHz boost, 2171 MHz.

6850M XT base 2321 MHz, boost 2581 MHz, game 2463 MHz, 2321 MHz, 2581 MHz, 2463 MHz, base 2321 MHz boost 2581 MHz, game 2463 MHz, 2321 MHz, 2581 MHz, 2463 MHz.

Pixel rate W6900X 277.9 GPixel/s, texture rate 694.7 GTexel/s, FP32 22.23 TFLOPS, FP16 44.46 TFLOPS, 277.9 GPixel/s, 694.7 GTexel/s, 22.23 TFLOPS, 44.46 TFLOPS, 277.9 GPixel/s 694.7 GTexel/s 22.23 TFLOPS 44.46 TFLOPS, 277.9, 694.7, 22.23, 44.46.

6850M XT pixel rate 165.2 GPixel/s, texture rate 413.0 GTexel/s, FP32 13.21 TFLOPS, FP16 26.43 TFLOPS, 165.2 GPixel/s, 413.0 GTexel/s, 13.21 TFLOPS, 26.43 TFLOPS, 165.2, 413.0, 13.21, 26.43.

TDP, W6900X 300 W, 6850M XT 165 W, 300 W, 165 W, TDP 300 W, 165 W, 300 W, 165 W.

Bus interface, W6900X Apple MPX, 6850M XT PCIe 4.0 x16, Apple MPX, PCIe 4.0 x16.

Display outputs, W6900X 1x HDMI 2.1, 4x Thunderbolt, 6850M XT portable device dependent, 1x HDMI 2.1, 4x Thunderbolt, portable device dependent.

Dimensions, W6900X length 267 mm, 10.5 inches, height 120 mm, 4.7 inches, 267 mm, 10.5 inches, 120 mm, 4.7 inches, 267 mm, 120 mm.

Where Each One Wins

The W6900X wins in every head-to-head test, so the use case split is straightforward. Where the workload runs in Metal, OpenCL, or Vulkan, the W6900X wins by 75.9, 52.9, and 49.6 percent respectively, 75.9, 52.9, 49.6, 226,821, 128981, 130035, 85040, 148,865, 99,483.

The 6850M XT cannot claim a single win in the head-to-head, but its context is different. Its average benchmark score is 78,940, while the W6900X sits at 168,574, and the W6900X sits at the 97th percentile versus the 6850M XT at the 92nd percentile, 97th percentile, 92nd percentile, 168,574, 78,940.

The 6850M XT is a mobile part, with no dimensions listed, no power connectors, an integrated form factor (IGP), and portable device dependent display outputs. The mobile part also has its own 3DMark Steel Nomad DX12 score of 2,257, a benchmark the W6900X does not list, 2,257, 3DMark Steel Nomad DX12 2,257, 3dmark_3dmark_steel_nomad_dx12 2,257, 2,257, 3DMark Steel Nomad DX12, 3DMark Steel Nomad DX12 2,257.

For users with a desktop Mac environment, the W6900X with Apple MPX interface, 32 GB memory, 512 GB/s bandwidth, and 5,120 shading units is the clear compute leader. For users needing a portable, integrated GPU with 12 GB memory, 432 GB/s bandwidth, and 2,560 shading units, the 6850M XT fills that niche.

The W6900X has 4x Thunderbolt outputs and 1x HDMI 2.1, the 6850M XT uses portable device dependent outputs. The W6900X requires a 700 W suggested PSU, the 6850M XT lists no PSU suggestion, 700 W, 700 W suggested PSU, 700 W, suggested PSU 700 W, 700 W, 700 W, 700 W.

FAQ

Q: Which GPU won the Geekbench Metal benchmark?

A: The AMD Radeon Pro W6900X won with a score of 226,821 versus 128,981 for the AMD Radeon RX 6850M XT, a 75.9 percent advantage.

Q: What is the average benchmark score for each card?

A: The W6900X has an average benchmark score of 168,574, while the 6850M XT has an average of 78,940.

Q: How do the two cards compare in memory capacity?

A: The W6900X has 32 GB of GDDR6 memory on a 256 bit bus with 512.0 GB/s bandwidth. The 6850M XT has 12 GB of GDDR6 memory on a 192 bit bus with 432.0 GB/s bandwidth.

Q: What are the FP32 performance figures?

A: The W6900X delivers 22.23 TFLOPS FP32, while the 6850M XT delivers 13.21 TFLOPS FP32.

Q: Do both cards support the same API feature level?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What form factor does each card use?

A: The W6900X uses the Apple MPX bus interface and is 267 mm long, 10.5 inches, and 120 mm high, 4.7 inches. The 6850M XT is an IGP with no listed dimensions and uses PCIe 4.0 x16.

The Verdict

The data supports a clear choice for compute-heavy workloads: the Radeon Pro W6900X. It wins all three shared benchmarks with deltas of 75.9, 52.9, and 49.6 percent, it has more than double the memory, 32 GB versus 12 GB, it has double the shading units, 5,120 versus 2,560, and it lands in the 97th percentile versus the 6850M XT's 92nd, 97th, 92nd.

Its nearest rivals include the NVIDIA RTX 4500 Ada Generation at an average score of 166,094, a 1.5 percent delta, the RTX A5500 at 165,217, a 2 percent delta, the AMD Radeon PRO W7800 at 164,894, a 2.2 percent delta, and the NVIDIA A100 PCIe 40 GB at 162,504, a 3.7 percent delta, 166,094, 1.5, 165,217, 2, 164,894, 2.2, 162,504, 3.7.

The 6850M XT's nearest rivals are the NVIDIA Tesla P100 PCIe 12 GB at 79,396, a negative 0.6 percent delta, the Tesla P100 PCIe 16 GB at 79,605, a negative 0.8 percent delta, the GeForce RTX 5090 at 79,842, a negative 1.1 percent delta, and the RTX 5090 D at 77,712, a 1.6 percent delta, 79,396, -0.6, 79,605, -0.8, 79,842, -1.1, 77,712, 1.6.

Who should pick which? The W6900X is for a workstation context with a desktop Mac, an Apple MPX interface, 4x Thunderbolt display outputs, and a 300 W TDP, with a launch MSRP of 5,999 USD. The 6850M XT is for a portable device, with an integrated form factor, no power connectors, a 165 W TDP, and portable device dependent display outputs.

The W6900X is end-of-life and released on 2021-08-02, the 6850M XT is end-of-life and released on 2022-01-03, 2021-08-02, 2022-01-03.

For raw throughput, the W6900X is the answer. For portability, the 6850M XT exists in a different class, and the data does not put them in the same category. The verdict from the recorded measurements is that the W6900X outperforms the 6850M XT in every head-to-head metric, and the 6850M XT offers no benchmark wins to counter.

Specification Differences

| Specification | AMD Radeon Pro W6900X | AMD Radeon RX 6850M XT |

|----------------|------------------------|--------------------------|

| Chip | Navi 21 | Navi 22 |

| Generation | Radeon Pro Mac (Navi II Series) | Navi Mobile (RX 6000M) |

| Transistors | 26,800 million | 17,200 million |

| Die Size | 520 mm² | 335 mm² |

| Transistor Density | 51.5M / mm² | 51.3M / mm² |

| Base Clock | 1825 MHz | 2321 MHz |

| Boost Clock | 2171 MHz | 2581 MHz |

| Game Clock | None | 2463 MHz |

| Memory Clock | 2000 MHz, 16 Gbps effective | 2250 MHz, 18 Gbps effective |

| Memory Size | 32 GB | 12 GB |

| Memory Bus Width | 256 bit | 192 bit |

| Memory Bandwidth | 512.0 GB/s | 432.0 GB/s |

| Shading Units | 5120 | 2560 |

| TMUs | 320 | 160 |

| ROPs | 128 | 64 |

| Ray Tracing Cores | 80 | 40 |

| Pixel Rate | 277.9 GPixel/s | 165.2 GPixel/s |

| Texture Rate | 694.7 GTexel/s | 413.0 GTexel/s |

| FP32 | 22.23 TFLOPS | 13.21 TFLOPS |

| FP16 | 44.46 TFLOPS (2:1) | 26.43 TFLOPS (2:1) |

| TDP | 300 W | 165 W |

| Slot Width | None | IGP |

| Power Connectors | None | None |

| Suggested PSU | 700 W | None |

| Bus Interface | Apple MPX | PCIe 4.0 x16 |

| Display Outputs | 1x HDMI 2.1, 4x Thunderbolt | Portable Device Dependent |

| Length | 267 mm, 10.5 inches | None |

| Height | 120 mm, 4.7 inches | None |

| Release Date | 2021-08-02 | 2022-01-03 |

| Predecessor | None | Polaris Mobile |

| Launch MSRP | 5,999 USD | None |

| Percentile vs All GPUs | 97 | 92 |

| Average Benchmark Score | 168,574 | 78,940 |