AMD Radeon Pro W6900X vs AMD Radeon RX 7900M Comparison

Head-to-Head Benchmarks

The recorded head-to-head data covers two cross-generational API workloads, and the results split exactly one win apiece. In Geekbench OpenCL, the AMD Radeon Pro W6900X scores 130,035 against the AMD Radeon RX 7900M's 129,499, a margin of only 0.4%. That is effectively a statistical tie, but the database credits the W6900X with the win. The RX 7900M counters in Geekbench Vulkan, scoring 158,760 versus the W6900X's 148,865, a 6.2% advantage for the mobile part. The Vulkan result is the more decisive of the two, as the delta more than doubles the OpenCL gap.

Context from the wider benchmark database helps interpret these numbers. The W6900X posts an average benchmark score of 168,574 across all recorded tests, placing it in the 97th percentile of all GPUs. Its nearest rivals include the NVIDIA RTX 4500 Ada Generation at 166,094 (1.5% behind), the NVIDIA RTX A5500 at 165,217 (2% behind), the AMD Radeon PRO W7800 at 164,894 (2.2% behind), and the NVIDIA A100 PCIe 40 GB at 162,504 (3.7% behind). The W6900X sits at the top of that cluster, meaning its lead over the closest competitor is narrow but consistent.

The RX 7900M's average benchmark score is 97,487, which places it in the 94th percentile. Its nearest rivals are a different tier: the AMD Radeon Pro VII at 97,131 (0.4% behind), the NVIDIA Quadro RTX 6000 at 101,872 (4.3% ahead of the 7900M), the AMD Radeon Instinct MI60 at 92,466 (5.4% behind), and the NVIDIA RTX A4500 at 91,671 (6.3% behind). The average score gap between the two AMD cards is substantial: the W6900X leads by roughly 73% in aggregate. Yet the head-to-head OpenCL test shows only a 0.4% difference, suggesting that OpenCL does not stress the architectural advantages that separate these two parts elsewhere.

The Vulkan result is where the RX 7900M demonstrates its strength. A 6.2% lead over the W6900X in that API aligns with the newer RDNA 3.0 architecture's improvements in graphics-centric workloads. The W6900X still holds the overall average score crown, but the RX 7900M's Vulkan showing indicates that API choice materially changes the competitive picture.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon Pro W6900X has an average benchmark score of 168,574, compared to 97,487 for the AMD Radeon RX 7900M. The W6900X also sits in the 97th percentile of all GPUs, while the RX 7900M sits in the 94th.

Q: How do the two cards compare in Geekbench OpenCL?

A: The W6900X scores 130,035 and the RX 7900M scores 129,499. The W6900X wins by 0.4%, a margin small enough to be considered negligible in real-world terms.

Q: Which card wins in Geekbench Vulkan, and by how much?

A: The RX 7900M wins with a score of 158,760 versus the W6900X's 148,865, a 6.2% advantage. This is the larger of the two head-to-head deltas.

Q: What are the closest rivals to the W6900X in the database?

A: The nearest rivals are the NVIDIA RTX 4500 Ada Generation at 166,094 (1.5% behind), the NVIDIA RTX A5500 at 165,217 (2% behind), the AMD Radeon PRO W7800 at 164,894 (2.2% behind), and the NVIDIA A100 PCIe 40 GB at 162,504 (3.7% behind).

Q: What are the closest rivals to the RX 7900M in the database?

A: The nearest rivals are the AMD Radeon Pro VII at 97,131 (0.4% behind), the NVIDIA Quadro RTX 6000 at 101,872 (4.3% ahead), the AMD Radeon Instinct MI60 at 92,466 (5.4% behind), and the NVIDIA RTX A4500 at 91,671 (6.3% behind).

Q: Which card has a higher pixel rate?

A: The RX 7900M has a pixel rate of 401.3 GPixel/s, while the W6900X has 277.9 GPixel/s. The RX 7900M leads by roughly 44%.

Where Each One Wins

The AMD Radeon Pro W6900X wins in aggregate compute performance and in OpenCL specifically. Its average score of 168,574 versus 97,487 gives it a commanding lead in the database's overall ranking, and its 97th percentile placement versus the RX 7900M's 94th reflects that dominance. The W6900X also holds the edge in raw FP32 throughput at 22.23 TFLOPS, though that figure alone does not explain the full benchmark gap. The OpenCL head-to-head win, even at 0.4%, shows the W6900X can match the newer part in compute-oriented APIs. For workloads that rely on OpenCL, such as certain scientific or professional compute tasks, the W6900X is the safer choice based on the recorded data.

The AMD Radeon RX 7900M wins in Vulkan and in several architectural efficiency metrics. Its 6.2% Vulkan lead over the W6900X indicates stronger graphics API performance, which matters for gaming and real-time rendering workloads. The RX 7900M also delivers a higher pixel rate at 401.3 GPixel/s versus 277.9 GPixel/s, and a higher memory bandwidth at 576.0 GB/s versus 512.0 GB/s. These advantages suggest the RX 7900M is better suited for framebuffer-heavy and bandwidth-sensitive tasks. The RX 7900M's lower TDP of 180 W versus 300 W also makes it the more power-efficient part, which is relevant for mobile or thermally constrained systems.

For users prioritizing raw compute density and professional-grade throughput, the W6900X is the data-backed pick. For those prioritizing modern graphics API performance and bandwidth efficiency, the RX 7900M has the edge. The two cards are not direct substitutes; the W6900X targets a workstation segment with 32 GB of memory, while the RX 7900M targets a mobile segment with 16 GB.

Specification Differences

The two AMD GPUs differ across nearly every major specification category. The W6900X uses the Navi 21 chip on the RDNA 2.0 architecture, while the RX 7900M uses Navi 31 on RDNA 3.0. The process node moves from 7 nm to 5 nm, both fabricated by TSMC. Transistor counts differ significantly: the W6900X has 26,800 million transistors on a 520 mm² die, while the RX 7900M has 57,700 million transistors on a 529 mm² die. Transistor density jumps from 51.5M per mm² to 109.1M per mm².

Memory configurations diverge sharply. The W6900X offers 32 GB of GDDR6 on a 256-bit bus, with 512.0 GB/s bandwidth and 2000 MHz memory clock (16 Gbps effective). The RX 7900M offers 16 GB of GDDR6 on a 256-bit bus, with 576.0 GB/s bandwidth and 2250 MHz memory clock (18 Gbps effective). The RX 7900M has higher bandwidth but half the capacity.

Compute unit counts also differ. The W6900X has 5120 shading units, 320 texture mapping units, 128 render output units, and 80 ray tracing cores. The RX 7900M has 4608 shading units, 288 TMUs, 192 ROPs, and 72 ray tracing cores. The W6900X has more shading units and TMUs, but the RX 7900M has more ROPs. Clock speeds are close at base (both 1825 MHz), but the W6900X boosts higher at 2171 MHz versus 2090 MHz.

Rates and throughput favor each in different areas. The W6900X has a pixel rate of 277.9 GPixel/s and texture rate of 694.7 GTexel/s. The RX 7900M has a pixel rate of 401.3 GPixel/s and texture rate of 601.9 GTexel/s. FP32 performance is 22.23 TFLOPS for the W6900X and 38.52 TFLOPS for the RX 7900M. FP16 performance is 44.46 TFLOPS (2:1) versus 77.05 TFLOPS (2:1). The RX 7900M is significantly ahead in raw floating-point throughput.

Power and physical specifications diverge. The W6900X has a TDP of 300 W and a suggested PSU of 700 W, while the RX 7900M has a TDP of 180 W and no suggested PSU listed. The W6900X uses an Apple MPX bus interface, while the RX 7900M uses PCIe 4.0 x16. Display outputs differ: the W6900X has 1x HDMI 2.1 and 4x Thunderbolt, while the RX 7900M's outputs are portable device dependent. The W6900X has physical dimensions of 267 mm length and 120 mm height, while the RX 7900M lists no dimensions. The W6900X is end-of-life, while the RX 7900M is active.

Architecture Differences

The architectural gap between these two GPUs is generational. The W6900X is built on RDNA 2.0 with the Navi 21 chip, while the RX 7900M uses RDNA 3.0 with the Navi 31 chip. The RX 7900M's codename is Plum Bonito, and it belongs to the Navi Mobile (RX 7000M) generation. The W6900X belongs to the Radeon Pro Mac (Navi II Series) generation.

The process node change from 7 nm to 5 nm is the most fundamental difference. The RX 7900M packs more than double the transistor count (57,700 million versus 26,800 million) into a nearly identical die size (529 mm² versus 520 mm²). This density improvement, from 51.5M to 109.1M transistors per mm², enables the RX 7900M to achieve higher FP32 throughput despite having fewer shading units. The RX 7900M delivers 38.52 TFLOPS FP32 from 4608 shading units, while the W6900X delivers 22.23 TFLOPS from 5120 shading units. This indicates that RDNA 3.0's per-shader efficiency is substantially higher.

Memory architecture also reflects the generational shift. Both use GDDR6 on a 256-bit bus, but the RX 7900M runs its memory at 2250 MHz (18 Gbps effective) versus 2000 MHz (16 Gbps effective), yielding 576.0 GB/s versus 512.0 GB/s. The RX 7900M compensates for its smaller 16 GB capacity with higher bandwidth, which is typical for a mobile part where capacity is constrained by physical space.

The RX 7900M's ROP count is 192 versus 128 on the W6900X, which explains its higher pixel rate of 401.3 GPixel/s versus 277.9 GPixel/s. The W6900X counters with more TMUs (320 versus 288) and more ray tracing cores (80 versus 72), though the RX 7900M's ray tracing cores are from a newer generation. The API support is identical in both cards: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The W6900X's Apple MPX bus interface and Thunderbolt outputs indicate a design tailored for Apple Mac Pro systems, while the RX 7900M's PCIe 4.0 x16 interface and portable-device-dependent outputs indicate a mobile-first design. The W6900X's 300 W TDP and 267 mm length reflect a desktop workstation card, while the RX 7900M's 180 W TDP and IGP slot width reflect an integrated mobile solution. The RX 7900M is the newer product, released on 2023-10-18, versus the W6900X's 2021-08-02 release. Its predecessor is listed as Polaris Mobile, while the W6900X has no listed predecessor or successor.