AMD Radeon PRO W7900 vs AMD Radeon Pro WX 9100 Comparison

Head-to-Head Benchmarks

The benchmark data presents a decisive generational divide. In the OpenCL workload, the AMD Radeon PRO W7900 scores 84,379 against the Radeon Pro WX 9100's 66,605, a 26.7% advantage. That is a substantial margin, but it is the Vulkan result that truly separates these two cards. The W7900 posts 137,070, while the WX 9100 manages only 54,711, yielding a staggering 150.5% delta. The W7900 wins both recorded head-to-head tests, with the Vulkan gap being roughly five times larger than the OpenCL gap.

The OpenCL result is worth examining more closely. A 26.7% lead in a compute API that both architectures support natively suggests the newer card's raw throughput advantage, but it is not an overwhelming generational leap. The Vulkan result, however, tells a different story. The WX 9100's score of 54,711 places it far behind not only the W7900 but also behind its own OpenCL performance, which is unusual. The W7900's Vulkan score of 137,070 is more than double the WX 9100's best recorded result in any API, indicating that the newer architecture extracts far more efficiency from modern graphics APIs.

When placed against their respective peer groups, both cards hold their ground differently. The W7900's average benchmark score of 110,725 puts it within 1% of the AMD Radeon Pro Vega II (109,617) and 3.2% ahead of the AMD Radeon Pro W6600X (107,342). It trails the NVIDIA RTX A5500 Mobile by 2.8% and the NVIDIA Tesla V100 SXM2 16 GB by 3.2%. The WX 9100, with an average score of 64,212, sits in a much tighter cluster: it is 0.6% ahead of the NVIDIA CMP 30HX and AMD Radeon RX 9060 XT LP, 0.7% ahead of the AMD Radeon RX 7600M, and 0.8% ahead of the AMD Radeon Pro Vega 56. These deltas are small, indicating that the WX 9100's performance class is densely populated, whereas the W7900 competes in a sparser, higher-performance tier.

Architecture Differences

The architectural gap between these two cards is vast, spanning nearly six years of process and design evolution. The W7900 uses the Navi 31 chip built on TSMC's 5 nm process, with 57,700 million transistors on a 529 mm² die, yielding a transistor density of 109.1 million per mm². The WX 9100 uses the Vega 10 chip on GlobalFoundries' 14 nm process, with 12,500 million transistors on a 495 mm² die, for a density of 25.3 million per mm². That is a 4.3x density advantage for the newer part, achieved while keeping the die size relatively similar.

The compute resources differ sharply. The W7900 carries 6,144 shading units, 384 texture mapping units, and 192 render output units, plus 96 dedicated ray tracing cores. The WX 9100 has 4,096 shading units, 256 TMUs, and only 64 ROPs, with no ray tracing hardware at all. The pixel rate tells the story: the W7900 reaches 479.0 GPixel/s versus 96.00 GPixel/s for the WX 9100, a 5x difference. Texture rate is 958.1 GTexel/s versus 384.0 GTexel/s, a 2.5x gap. FP32 throughput is 61.32 TFLOPS versus 12.29 TFLOPS, a 5x difference. The WX 9100 does have a FP16 advantage in ratio terms, delivering 24.58 TFLOPS at 2:1, but the W7900 matches its FP32 and FP16 at 61.32 TFLOPS each, so the absolute FP16 performance is still far higher on the newer card.

Memory is another fundamental split. The W7900 uses 48 GB of GDDR6 on a 384-bit bus, delivering 864.0 GB/s of bandwidth. The WX 9100 uses 16 GB of HBM2 on a 2048-bit bus, delivering 483.8 GB/s. The WX 9100's memory clock is 945 MHz (1890 Mbps effective), while the W7900 runs at 2250 MHz (18 Gbps effective). The W7900 offers three times the capacity and nearly double the bandwidth, despite using a narrower bus. The WX 9100's HBM2 implementation was advanced for its time, but the newer GDDR6 solution is simply faster and more capacious.

Clock speeds also favor the newer card. The W7900 runs at a base of 1760 MHz and boosts to 2495 MHz. The WX 9100 is at 1200 MHz base and 1500 MHz boost. The W7900's boost clock is 66% higher, which compounds with its larger shader count. The W7900 draws 295 W versus 230 W for the WX 9100, a 65 W increase that buys a 5x FP32 uplift. The W7900 requires a triple-slot cooler and two 8-pin power connectors with a 600 W suggested PSU, while the WX 9100 fits in a dual-slot with one 6-pin and one 8-pin connector and a 550 W suggested PSU.

Interface and display support also differ. The W7900 uses PCIe 4.0 x16 and outputs three DisplayPort 2.1 plus one mini-DisplayPort 2.1. The WX 9100 uses PCIe 3.0 x16 and outputs six mini-DisplayPort 1.4a connectors. The W7900 supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the WX 9100 is limited to DirectX 12 (12_1) and Vulkan 1.3. Both support OpenGL 4.6.

Where Each One Wins

The data points to a clear division of labor. The W7900 wins every recorded benchmark category, so the question is not whether it wins, but where its advantages are most pronounced and where the WX 9100 remains competitive relative to its own class.

The Vulkan workload is the W7900's strongest territory. Its 150.5% lead over the WX 9100 in that API dwarfs the OpenCL gap. This suggests that the RDNA 3.0 architecture, with its ray tracing cores and modern API support, is far better optimized for current-generation graphics workloads. Any professional application that leverages Vulkan for rendering, simulation, or real-time visualization will see outsized gains on the W7900.

The OpenCL result, while still a clear win for the W7900, is more modest at 26.7%. This indicates that the WX 9100's GCN 5.0 architecture, which was designed with compute in mind, still holds up reasonably well in raw compute APIs. For legacy compute workloads that rely on OpenCL, the WX 9100 is not completely outclassed. It delivers 12.29 TFLOPS of FP32, which is roughly one-fifth of the W7900's 61.32 TFLOPS, and the benchmark gap is roughly one-quarter, meaning the WX 9100 extracts proportionally more of its theoretical peak in OpenCL than the W7900 does.

The WX 9100's FP16 capability deserves a note. Its 24.58 TFLOPS at 2:1 ratio is a specific strength for workloads that can use packed math. The W7900's FP16 is 61.32 TFLOPS at 1:1, meaning it treats FP16 and FP32 equally. For applications that are FP16-bound and can exploit the WX 9100's packed rate, the older card is less far behind in that specific metric than in others, though still behind in absolute terms.

The WX 9100 also holds an advantage in display connectivity. Its six mini-DisplayPort 1.4a outputs exceed the W7900's four DisplayPort 2.1 connections. For multi-display setups that require more than four outputs without daisy-chaining, the WX 9100 has a practical edge. The W7900's DisplayPort 2.1 support is newer and higher-bandwidth, but the WX 9100 offers more physical connections.

FAQ

Q: Which card has higher memory bandwidth?

A: The AMD Radeon PRO W7900 delivers 864.0 GB/s, while the AMD Radeon Pro WX 9100 provides 483.8 GB/s. The W7900 has nearly double the bandwidth despite using a 384-bit GDDR6 bus versus the WX 9100's 2048-bit HBM2 bus.

Q: Does the WX 9100 support ray tracing?

A: No. The WX 9100 has no ray tracing cores. The W7900 includes 96 dedicated ray tracing cores, which contributes to its 150.5% lead in the Vulkan benchmark.

Q: What is the FP32 performance difference?

A: The W7900 delivers 61.32 TFLOPS of FP32, while the WX 9100 delivers 12.29 TFLOPS. That is a 5x difference in raw single-precision compute throughput.

Q: Which card has more memory capacity?

A: The W7900 has 48 GB of GDDR6, three times the 16 GB of HBM2 found on the WX 9100. The W7900's 48 GB capacity is its largest memory advantage, exceeding the WX 9100 by 32 GB.

Q: How do the two cards compare in their respective peer groups?

A: The W7900's average score of 110,725 places it 1% above the AMD Radeon Pro Vega II and 3.2% above the AMD Radeon Pro W6600X, but 2.8% below the NVIDIA RTX A5500 Mobile and 3.2% below the NVIDIA Tesla V100 SXM2 16 GB. The WX 9100's average of 64,212 is 0.6% above the NVIDIA CMP 30HX and AMD Radeon RX 9060 XT LP, 0.7% above the AMD Radeon RX 7600M, and 0.8% above the AMD Radeon Pro Vega 56.

Q: What API support differences exist?

A: The W7900 supports DirectX 12 Ultimate (12_2) and Vulkan 1.4. The WX 9100 supports DirectX 12 (12_1) and Vulkan 1.3. Both support OpenGL 4.6.

The Verdict

The recorded data leaves no ambiguity for most workloads. The AMD Radeon PRO W7900 is the superior card in raw performance, memory capacity, bandwidth, and modern API support. Its 26.7% OpenCL lead and 150.5% Vulkan lead over the WX 9100 are decisive. Its 48 GB memory capacity is triple that of the WX 9100, and its 864.0 GB/s bandwidth is nearly double. The W7900's 5x FP32 advantage and 5x pixel rate advantage make it the clear choice for compute-heavy, rendering-heavy, or AI-adjacent professional workloads.

The WX 9100, however, is not without a niche. Its six mini-DisplayPort 1.4a outputs provide more physical display connections than the W7900's four DisplayPort 2.1 ports, making it preferable for multi-display configurations that exceed four monitors. Its FP16 packed rate of 24.58 TFLOPS at 2:1 is a specific feature that some legacy compute workloads can exploit, and its 230 W power draw with a 550 W suggested PSU is more modest than the W7900's 295 W and 600 W suggested PSU. For organizations with existing GCN-era software optimizations and a need for many display outputs, the WX 9100 still has a role.

For nearly every other scenario, the data points to the W7900. Its 94th percentile ranking among all GPUs, versus the WX 9100's 89th percentile, reflects its position in a higher performance class. The W7900's average benchmark score of 110,725 is 72.5% higher than the WX 9100's 64,212. The W7900 is also an active production product with a launch MSRP of 3,999 USD, while the WX 9100 is end-of-life. Professionals choosing between these two should select the W7900 unless their specific workflow demands more than four display outputs or relies on legacy FP16 packed math. The benchmark record is unambiguous: the W7900 is the modern, higher-performance part, and the WX 9100 is a legacy product whose strengths are narrow and specific.