AMD Radeon Pro WX 9100 vs AMD Radeon RX 6900 XT Comparison

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon Pro WX 9100 has an average benchmark score of 64,212, while the AMD Radeon RX 6900 XT has an average benchmark score of 50,951. However, the RX 6900 XT wins all three head-to-head benchmark comparisons in the database.

Q: How does the RX 6900 XT compare to the WX 9100 in Geekbench Metal performance?

A: The RX 6900 XT scores 177,021 in Geekbench Metal, which is 59.7% higher than the WX 9100's score of 71,319. This represents the narrowest performance gap between the two cards in the head-to-head tests.

Q: What is the largest performance difference recorded between these two GPUs?

A: The largest gap appears in Geekbench OpenCL, where the RX 6900 XT scores 187,673 versus the WX 9100's 66,605. The RX 6900 XT leads by 64.5% in that test.

Q: Do both cards support the same graphics APIs?

A: No. The WX 9100 supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3. The RX 6900 XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: Which card is positioned higher in the overall GPU percentile ranking?

A: The WX 9100 sits at the 89th percentile among all GPUs, while the RX 6900 XT sits at the 86th percentile. Despite this, the RX 6900 XT wins every head-to-head benchmark in the database.

Q: What are the memory configurations of these two cards?

A: Both cards have 16 GB of memory, but they use different types. The WX 9100 uses HBM2 with a 2048-bit bus and 483.8 GB/s bandwidth, while the RX 6900 XT uses GDDR6 with a 256-bit bus and 512.0 GB/s bandwidth.

Architecture Differences

The AMD Radeon Pro WX 9100 is built on the Vega 10 chip using the GCN 5.0 architecture, manufactured on a 14 nm process at GlobalFoundries. The AMD Radeon RX 6900 XT uses the Navi 21 chip with the RDNA 2.0 architecture, produced on a 7 nm process at TSMC. The process node difference is substantial: 14 nm versus 7 nm, and the transistor counts reflect that gap. The WX 9100 packs 12,500 million transistors on a 495 mm² die, giving a density of 25.3 million transistors per square millimeter. The RX 6900 XT contains 26,800 million transistors on a 520 mm² die, achieving 51.5 million transistors per square millimeter. That is more than double the transistor density of the older card.

The compute layout differs significantly. The WX 9100 has 4,096 shading units, 256 texture mapping units, and 64 raster operation pipelines. The RX 6900 XT increases those counts to 5,120 shading units, 320 TMUs, and 128 ROPs. The RX 6900 XT also includes 80 dedicated ray tracing cores, a feature completely absent from the WX 9100, which has no ray tracing hardware listed in the database. Neither card includes tensor cores.

Clock speeds show a clear generational jump. The WX 9100 has a base clock of 1200 MHz and a boost clock of 1500 MHz. The RX 6900 XT runs at a base clock of 1825 MHz, a game clock of 2015 MHz, and a boost clock of 2250 MHz. Memory architecture also diverges sharply. The WX 9100 uses HBM2 with a 2048-bit bus and 483.8 GB/s bandwidth, while the RX 6900 XT uses GDDR6 on a 256-bit bus with 512.0 GB/s bandwidth.

The output configurations reflect their intended roles. The WX 9100 provides six mini-DisplayPort 1.4a outputs, suited for professional multi-display setups. The RX 6900 XT offers one HDMI 2.1, two DisplayPort 1.4a, and one USB Type-C output. The bus interface also differs: PCIe 3.0 x16 for the WX 9100 versus PCIe 4.0 x16 for the RX 6900 XT.

Head-to-Head Benchmarks

The database records three direct head-to-head comparisons between these two GPUs, and the RX 6900 XT wins all three. The smallest margin is in Geekbench Metal, where the RX 6900 XT scores 177,021 against the WX 9100's 71,319. That is a 59.7% advantage for the newer card. Even at its closest, the RX 6900 XT nearly doubles the WX 9100's output, which illustrates the scale of architectural improvement between GCN 5.0 and RDNA 2.0.

Geekbench OpenCL shows a wider gap. The RX 6900 XT reaches 187,673, while the WX 9100 manages 66,605. The delta is 64.5% in favor of the RX 6900 XT. This test rewards the RX 6900 XT's higher shading unit count, higher clock speeds, and larger texture and pixel throughput. The WX 9100's 12.29 TFLOPS of FP32 performance cannot keep pace with the RX 6900 XT's 23.04 TFLOPS.

Geekbench Vulkan follows a similar pattern. The RX 6900 XT scores 148,525, which is 63.2% higher than the WX 9100's 54,711. The RX 6900 XT also supports Vulkan 1.4, while the WX 9100 is limited to Vulkan 1.3. The newer API version, combined with the RDNA 2.0 architecture, gives the RX 6900 XT a clear edge in this workload.

The recorded wins stand at 3 for the RX 6900 XT and 0 for the WX 9100. None of the three tests favor the older professional card. The average benchmark scores tell a different story at first glance, since the WX 9100's 64,212 average is higher than the RX 6900 XT's 50,951. That discrepancy comes from the different benchmark sets available for each card. The RX 6900 XT has a broader benchmark portfolio, including Passmark tests and 3DMark Steel Nomad DX12, which pull its average down. The WX 9100 only has three Geekbench entries in the database.

Specification Differences

The two cards differ across nearly every major specification category. The manufacturing process shifts from 14 nm at GlobalFoundries to 7 nm at TSMC. Transistor count rises from 12,500 million to 26,800 million, and transistor density climbs from 25.3M per mm² to 51.5M per mm².

Compute resources increase across the board. Shading units go from 4,096 to 5,120, TMUs from 256 to 320, and ROPs from 64 to 128. The RX 6900 XT adds 80 ray tracing cores, while the WX 9100 has none. FP32 performance jumps from 12.29 TFLOPS to 23.04 TFLOPS, and FP16 performance from 24.58 TFLOPS to 46.08 TFLOPS, both at a 2:1 ratio. Pixel rate rises from 96.00 GPixel/s to 288.0 GPixel/s, and texture rate from 384.0 GTexel/s to 720.0 GTexel/s.

Clock behavior changes substantially. The WX 9100's base clock of 1200 MHz and boost of 1500 MHz give way to a base of 1825 MHz, a game clock of 2015 MHz, and a boost of 2250 MHz on the RX 6900 XT. Memory clock also rises from 945 MHz (1890 Mbps effective) to 2000 MHz (16 Gbps effective).

Memory bus width drops from 2048-bit to 256-bit, but bandwidth still increases from 483.8 GB/s to 512.0 GB/s thanks to the faster GDDR6 signaling. Both cards carry 16 GB of memory. The physical design differs: the WX 9100 is dual-slot with a 1x 6-pin plus 1x 8-pin power connector setup, while the RX 6900 XT is triple-slot with 2x 8-pin connectors. Suggested PSU rises from 550 W to 700 W. Dimensions are similar in length, with both at 267 mm or 10.5 inches, but the RX 6900 XT is taller at 120 mm versus 111 mm and adds a 50 mm width measurement. The WX 9100 has no recorded width.

API support moves from DirectX 12 (12_1) to DirectX 12 Ultimate (12_2), and Vulkan advances from 1.3 to 1.4. Display outputs change from six mini-DisplayPort 1.4a to a mix of HDMI 2.1, two DisplayPort 1.4a, and USB Type-C. Bus interface advances from PCIe 3.0 x16 to PCIe 4.0 x16. The WX 9100 was released on 2017-07-09, while the RX 6900 XT arrived on 2020-10-27. Both are end-of-life products.

Where Each One Wins

The RX 6900 XT wins decisively in raw compute performance. Every head-to-head benchmark in the database favors it, with leads ranging from 59.7% to 64.5%. Its higher shading unit count, more than double the FP32 throughput, and significantly faster pixel and texture rates make it the stronger choice for graphics-intensive workloads. The 80 ray tracing cores give it a capability the WX 9100 simply does not possess. Gamers and users running modern DirectX 12 Ultimate applications will find the RX 6900 XT far more capable.

The WX 9100 has its own advantages, though they are not reflected in the benchmark wins. Its average benchmark score of 64,212 places it at the 89th percentile among all GPUs, three points higher than the RX 6900 XT's 86th percentile. The WX 9100's nearest rivals in the database are the NVIDIA CMP 30HX at 63,842 (0.6% behind), the AMD Radeon RX 9060 XT LP at 63,830 (0.6% behind), the AMD Radeon RX 7600M at 63,775 (0.7% behind), and the AMD Radeon Pro Vega 56 at 63,693 (0.8% behind). This clustering shows the WX 9100 sits in a competitive mid-range tier.

The WX 9100's six mini-DisplayPort 1.4a outputs make it suited for multi-display professional environments, where driving numerous monitors from a single card matters more than raw gaming performance. Its 2048-bit HBM2 memory bus, despite lower bandwidth than the RX 6900 XT's GDDR6, provides a wide memory path that can benefit certain professional applications. It also draws less power at 230 W versus 300 W, and requires a smaller 550 W PSU instead of 700 W.

The RX 6900 XT's nearest rivals include the NVIDIA CMP 50HX at 51,790 (1.6% ahead), the AMD Radeon RX Vega 64 at 50,001 (1.9% behind), the NVIDIA GeForce RTX 5070 Ti at 49,957 (2% behind), and the Intel Arc A550M at 49,737 (2.4% behind). This positions the RX 6900 XT slightly above its immediate competition, though its average score is dragged down by the wide range of benchmarks recorded for it, including lower DirectX 9, DirectX 10, and DirectX 11 Passmark scores.

For users prioritizing raw compute and modern gaming features, the RX 6900 XT is the clear winner. For professional multi-display setups where power draw is a concern and the HBM2 memory architecture is valued, the WX 9100 retains a niche. The database shows a generational gap: the 2020 RDNA 2.0 card outperforms the 2017 GCN 5.0 card in every direct comparison, even though the older card holds a higher percentile ranking and a higher average benchmark score within its narrower test set.