AMD Radeon PRO W7900 vs AMD Radeon RX 7900M Comparison

AMD Radeon PRO W7900 vs AMD Radeon RX 7900M: the data shows a clear split between a workstation-focused 48 GB card and a mobile gaming-class part with higher raw compute scores in specific API tests. The RX 7900M wins both direct head-to-head benchmark comparisons, yet the PRO W7900 holds its ground in the broader average-score context due to its massive memory capacity and professional positioning. The verdict is straightforward: pick the PRO W7900 for memory-bound professional workloads and sustained rendering tasks, while the RX 7900M is the choice for portable systems where higher Geekbench scores and lower power consumption matter more.

The Verdict

The data delivers a decisive conclusion: the AMD Radeon RX 7900M is the faster card in the two available head-to-head benchmark tests, winning both with substantial margins. In Geekbench OpenCL, the RX 7900M scores 129,499 against the PRO W7900’s 84,379, a 34.8% advantage. In Geekbench Vulkan, the RX 7900M leads with 158,760 versus 137,070, a 13.7% gap. If your priority is raw compute performance in these specific workloads, the mobile card wins outright.

However, the PRO W7900 is not without its own strengths. It carries 48 GB of GDDR6 memory on a 384-bit bus, delivering 864.0 GB/s of bandwidth—triple the RX 7900M’s 16 GB and 576.0 GB/s. For large datasets, high-resolution textures, or multi-GPU rendering scenes that exceed 16 GB, the PRO W7900 is the only viable option here. The average benchmark score tells a similar story: the PRO W7900 averages 110,725 across its two tests, while the RX 7900M averages 97,487 across three tests, meaning the PRO card is more consistent relative to its test set.

The PRO W7900 targets a different buyer entirely. It is a triple-slot, 295 W workstation card with a 3,999 USD launch MSRP, designed for professional environments where driver certification and memory capacity trump raw speed. The RX 7900M is an integrated graphics processor (IGP) with a 180 W TDP and no power connectors, built for laptops where efficiency and portability are non-negotiable. The verdict: choose the RX 7900M for compute-heavy tasks that fit in 16 GB and value raw scores; choose the PRO W7900 for memory-hungry professional workflows where 48 GB is a hard requirement.

Architecture Differences

Both cards share the same fundamental silicon: the Navi 31 chip, built on TSMC’s 5 nm process, with 57,700 million transistors on a 529 mm² die. The transistor density is identical at 109.1M per mm². Both use RDNA 3.0 architecture and the Plum Bonito codename, and both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The underlying hardware is the same; the differentiation comes from how AMD configures it.

The PRO W7900 is the fully enabled version. It has 6,144 shading units, 384 texture mapping units, and 192 ROPs, with 96 ray tracing cores. Its boost clock reaches 2,495 MHz, and it delivers 61.32 TFLOPS of FP32 performance. The RX 7900M is a cut-down variant: 4,608 shading units, 288 TMUs, and 72 RT cores, with a boost clock of 2,090 MHz. Its FP32 throughput is 38.52 TFLOPS, roughly 37% lower. The PRO card also offers FP16 at a 1:1 ratio (61.32 TFLOPS), while the RX 7900M doubles its FP16 to 77.05 TFLOPS using a 2:1 ratio, indicating a different compute prioritization.

Memory architecture diverges sharply. The PRO W7900 uses a 384-bit bus with 48 GB GDDR6, while the RX 7900M uses a 256-bit bus with 16 GB. Memory clock is identical at 2,250 MHz with 18 Gbps effective, but bandwidth differs: 864.0 GB/s versus 576.0 GB/s. The PRO card’s pixel rate is 479.0 GPixel/s versus 401.3 GPixel/s for the RX 7900M, and texture rates are 958.1 GTexel/s versus 601.9 GTexel/s. The RX 7900M compensates with a higher base clock (1,825 MHz vs 1,760 MHz) but a lower boost clock (2,090 MHz vs 2,495 MHz).

Where Each One Wins

The RX 7900M wins in every direct benchmark comparison available. In Geekbench OpenCL, it outperforms the PRO W7900 by 34.8%, a massive margin that suggests better driver optimization or workload fitting for the mobile card’s configuration. In Geekbench Vulkan, the RX 7900M leads by 13.7%, showing a smaller but still decisive advantage. The RX 7900M also has a higher Geekbench OpenCL score than its own average, pulling its overall percentile to 94, same as the PRO W7900.

The PRO W7900 wins on capacity and bandwidth. Its 48 GB memory is three times the RX 7900M’s 16 GB, and its 864.0 GB/s bandwidth is 50% higher. For tasks that spill beyond 16 GB—large 3D scenes, high-res video editing, AI model training with big batches—the PRO W7900 is the only card that fits. Its average benchmark score of 110,725 is 13,238 points higher than the RX 7900M’s 97,487, indicating better overall consistency across its test suite. The PRO card also has a higher pixel rate (479.0 vs 401.3 GPixel/s) and a much higher texture rate (958.1 vs 601.9 GTexel/s), which helps in rasterization-heavy workloads.

The RX 7900M wins on power efficiency. Its TDP is 180 W versus 295 W for the PRO W7900, a 115 W difference. It requires no power connectors, while the PRO card needs two 8-pin connectors and a 600 W suggested PSU. The RX 7900M is an IGP, meaning it is integrated into a laptop motherboard, whereas the PRO W7900 is a triple-slot card with dimensions of 280 mm length, 110 mm height, and 51 mm width. For mobile workstations or gaming laptops, the RX 7900M is the only realistic option.

FAQ

Q: Which card has higher raw compute performance?

A: The RX 7900M wins both head-to-head benchmarks: 129,499 vs 84,379 in Geekbench OpenCL (34.8% faster) and 158,760 vs 137,070 in Geekbench Vulkan (13.7% faster).

Q: Why would anyone choose the PRO W7900 if it loses every benchmark?

A: The PRO W7900 offers 48 GB of memory versus 16 GB, with 864.0 GB/s bandwidth versus 576.0 GB/s. For workloads that require more than 16 GB of VRAM, the RX 7900M is simply not an option.

Q: Are these cards based on the same chip?

A: Yes, both use the Navi 31 chip on TSMC’s 5 nm process, with 57,700 million transistors on a 529 mm² die, and both are RDNA 3.0 architecture with the Plum Bonito codename.

Q: What is the power draw difference?

A: The PRO W7900 has a 295 W TDP and requires two 8-pin power connectors with a 600 W suggested PSU. The RX 7900M has a 180 W TDP and uses no power connectors, classified as an IGP.

Q: Which card has better API support?

A: Both cards support identical APIs: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: How do these cards compare to their nearest rivals?

A: The PRO W7900 is 1% faster than the Radeon Pro Vega II but 2.8% slower than the NVIDIA RTX A5500 Mobile. The RX 7900M is 0.4% faster than the Radeon Pro VII and 5.4% faster than the Radeon Instinct MI60.

Head-to-Head Benchmarks

The only direct comparisons available are two Geekbench tests, and the RX 7900M dominates both. In Geekbench OpenCL, the RX 7900M scores 129,499 against the PRO W7900’s 84,379. That is a delta of -34.8%, meaning the PRO card is more than a third slower. This is a decisive win for the mobile part, likely reflecting the RX 7900M’s higher base clock (1,825 MHz vs 1,760 MHz) and potentially better compute unit utilization in this test. The PRO W7900’s lower score is surprising given its higher boost clock (2,495 MHz vs 2,090 MHz), but the data is unambiguous.

In Geekbench Vulkan, the gap narrows but the winner stays the same. The RX 7900M scores 158,760, while the PRO W7900 scores 137,070, a 13.7% delta. This is still a clear win for the RX 7900M, though the smaller margin suggests the PRO W7900’s higher pixel and texture rates (479.0 GPixel/s and 958.1 GTexel/s) help in Vulkan workloads. The RX 7900M’s FP16 performance of 77.05 TFLOPS (2:1) versus the PRO’s 61.32 TFLOPS (1:1) may also contribute to Vulkan’s compute-heavy paths.

The PRO W7900’s average benchmark score of 110,725 is higher than the RX 7900M’s 97,487, but this is misleading because the PRO card has only two benchmarks (both Geekbench) while the RX 7900M includes a 3DMark Steel Nomad DX12 result of 4,201, which drags its average down. The PRO card’s percentile rank is 94, same as the RX 7900M, placing both in the top tier of all GPUs. The RX 7900M’s nearest rival is the Radeon Pro VII at 0.4% delta, showing it is tightly packed with professional cards, while the PRO W7900’s closest rival is the Radeon Pro Vega II at 1% delta.

Specification Differences

The two cards diverge on nearly every measurable specification except the chip itself. Memory size is the most obvious: 48 GB on the PRO W7900 versus 16 GB on the RX 7900M. Bus width follows, 384-bit versus 256-bit, producing bandwidth of 864.0 GB/s versus 576.0 GB/s. Shading units are 6,144 versus 4,608, TMUs are 384 versus 288, and RT cores are 96 versus 72. The PRO W7900 has a higher boost clock (2,495 MHz vs 2,090 MHz) but a lower base clock (1,760 MHz vs 1,825 MHz). FP32 performance is 61.32 TFLOPS versus 38.52 TFLOPS, while FP16 differs in ratio: 1:1 on the PRO, 2:1 on the RX.

Power and physical design are polar opposites. The PRO W7900 is a 295 W triple-slot card with two 8-pin connectors and a 600 W suggested PSU, measuring 280 mm by 110 mm by 51 mm. The RX 7900M is a 180 W IGP with no power connectors and no listed dimensions, designed for portable devices. Display outputs differ: the PRO W7900 has 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1, while the RX 7900M’s outputs are dependent on the portable device. The PRO W7900 launched on 2023-05-25 with a 3,999 USD MSRP, while the RX 7900M launched later on 2023-10-18 with no MSRP listed. Both are Active in production status, and both support PCIe 4.0 x16.