AMD Radeon Pro 5500 XT vs AMD Radeon RX 6900 XT Comparison

The AMD Radeon RX 6900 XT and AMD Radeon Pro 5500 XT represent two very different endpoints in AMD’s graphics lineup, despite sharing a 7 nm TSMC manufacturing process. The RX 6900 XT is a 300 W, triple-slot, end-of-life flagship from the Radeon RX 6000 series, built for maximum rasterization throughput. The Pro 5500 XT is a 125 W, IGP-class (integrated graphics processor) mobile part from the Radeon Pro Mac series, designed for professional Apple environments with no display outputs. The benchmark data shows a complete performance sweep for the RX 6900 XT across all shared tests, with deltas ranging from 223.2% to 349.3%. However, the Pro 5500 XT holds its own in percentile ranking, sitting at the 84th percentile of all GPUs compared to the RX 6900 XT’s 86th percentile, indicating that its performance class is closer to the flagship than the raw score gap suggests.

Where Each One Wins

The RX 6900 XT wins every single head-to-head benchmark recorded in the data. In Geekbench Metal, it scores 177,021 against the Pro 5500 XT’s 54,779, a 223.2% advantage. In Geekbench OpenCL, the gap widens to 349.3%, with scores of 187,673 versus 41,772. The Vulkan test shows a 275.1% lead, with 148,525 points against 39,601. The data is unambiguous: there is no workload category in the shared test suite where the Pro 5500 XT takes a win. The RX 6900 XT also dominates in additional benchmarks not shared with the Pro 5500 XT, including PassMark G3D at 26,732, PassMark GPU Compute at 14,547, and 3DMark Steel Nomad DX12 at 4,079. Its average benchmark score stands at 50,951, compared to 45,384 for the Pro 5500 XT.

The Pro 5500 XT’s wins are contextual rather than direct. Its 84th percentile ranking places it within 2 percentile points of the RX 6900 XT’s 86th percentile. This is significant because the Pro 5500 XT achieves this with a 125 W TDP, no power connectors, and an IGP slot width, making it a viable option for thermally constrained professional systems. The RX 6900 XT, by contrast, requires a 700 W suggested PSU and dual 8-pin connectors. The Pro 5500 XT is also the only one of the two with a PCIe 4.0 x8 interface, which is half the lane width of the RX 6900 XT’s x16 connection, but it does not require external power. For a system builder prioritizing power efficiency and minimal physical footprint over raw performance, the Pro 5500 XT offers a compelling trade-off, though the benchmark data does not show any scenario where it outperforms the RX 6900 XT in compute or graphics throughput.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The AMD Radeon RX 6900 XT has an average benchmark score of 50,951, while the AMD Radeon Pro 5500 XT averages 45,384.

Q: What is the biggest performance delta between the two in any shared test?

A: The largest delta is in Geekbench OpenCL, where the RX 6900 XT scores 187,673 versus 41,772 for the Pro 5500 XT, a 349.3% difference.

Q: How do their percentile rankings compare?

A: The RX 6900 XT sits at the 86th percentile of all GPUs, while the Pro 5500 XT is at the 84th percentile, a gap of just 2 percentage points.

Q: Do both GPUs support the same DirectX version?

A: No. The RX 6900 XT supports DirectX 12 Ultimate (12_2), while the Pro 5500 XT supports DirectX 12 (12_1).

Q: What is the memory capacity difference?

A: The RX 6900 XT has 16 GB of GDDR6 memory on a 256-bit bus, while the Pro 5500 XT has 8 GB of GDDR6 on a 128-bit bus.

Q: Which GPU has a higher transistor density?

A: The RX 6900 XT has a transistor density of 51.5 million transistors per square millimeter, compared to 40.5 million for the Pro 5500 XT.

Head-to-Head Benchmarks

The shared benchmark suite between the two GPUs consists of three Geekbench tests, and the RX 6900 XT wins all three with overwhelming margins. In Geekbench Metal, the RX 6900 XT produces 177,021 points against 54,779 for the Pro 5500 XT. The 223.2% delta means the RX 6900 XT delivers more than three times the Metal performance of the Pro 5500 XT. This test is particularly relevant for Apple ecosystem workloads, where Metal is the primary graphics API. The Pro 5500 XT’s inclusion in the Radeon Pro Mac generation suggests it was designed for such environments, yet it trails by a factor of 3.2x.

Geekbench OpenCL shows an even more pronounced gap. The RX 6900 XT scores 187,673, while the Pro 5500 XT manages 41,772. The 349.3% delta is the largest of any shared test, indicating that the RX 6900 XT’s compute throughput advantage is most pronounced under OpenCL. This is consistent with the specification differences: the RX 6900 XT has 5,120 shading units and 23.04 TFLOPS FP32 performance, versus 1,536 shading units and 5.398 TFLOPS for the Pro 5500 XT. The RX 6900 XT also has 320 texture mapping units and 128 ROPs, compared to 96 and 32 respectively.

The Vulkan test continues the trend, with the RX 6900 XT scoring 148,525 against 39,601 for the Pro 5500 XT, a 275.1% delta. Across all three tests, the RX 6900 XT’s minimum lead is 223.2%, and its average delta across the suite is approximately 282.5%. The Pro 5500 XT’s nearest rivals in the overall database include the Intel Arc A730M with a delta of -0.5% and the NVIDIA GeForce RTX 5090 Mobile at +0.5%, placing its performance in the mobile discrete GPU range. The RX 6900 XT’s nearest rivals include the NVIDIA CMP 50HX at -1.6% and the AMD Radeon RX Vega 64 at +1.9%, showing it competes with dedicated mining and previous-generation flagship parts. The head-to-head data leaves no ambiguity: the RX 6900 XT is in a different performance tier entirely.

Specification Differences

The two GPUs differ across nearly every measurable specification. The RX 6900 XT has 16 GB of GDDR6 memory on a 256-bit bus, delivering 512.0 GB/s of bandwidth. The Pro 5500 XT has 8 GB of GDDR6 on a 128-bit bus, with 224.0 GB/s of bandwidth. Memory clock speeds are 2000 MHz (16 Gbps effective) for the RX 6900 XT versus 1750 MHz (14 Gbps effective) for the Pro 5500 XT. The RX 6900 XT has 5,120 shading units, 320 TMUs, and 128 ROPs, while the Pro 5500 XT has 1,536 shading units, 96 TMUs, and 32 ROPs. The RX 6900 XT also has 80 ray tracing cores, while the Pro 5500 XT has none.

Clock speeds show a similar disparity. The RX 6900 XT has a base clock of 1825 MHz, a boost clock of 2250 MHz, and a game clock of 2015 MHz. The Pro 5500 XT has a base clock of 1187 MHz and a boost clock of 1757 MHz, with no game clock listed. Pixel rate for the RX 6900 XT is 288.0 GPixel/s versus 56.22 GPixel/s for the Pro 5500 XT. Texture rates are 720.0 GTexel/s and 168.7 GTexel/s respectively. FP32 performance is 23.04 TFLOPS for the RX 6900 XT and 5.398 TFLOPS for the Pro 5500 XT, while FP16 performance is 46.08 TFLOPS (2:1) versus 10.80 TFLOPS (2:1).

Power and physical specifications also diverge sharply. The RX 6900 XT is rated at 300 W TDP with a triple-slot width, requiring two 8-pin power connectors and a 700 W suggested PSU. The Pro 5500 XT is rated at 125 W TDP with an IGP slot width, requires no power connectors, and has a 300 W suggested PSU. The RX 6900 XT measures 267 mm in length, 120 mm in height, and 50 mm in width, while the Pro 5500 XT has no listed dimensions. The RX 6900 XT has display outputs including 1x HDMI 2.1, 2x DisplayPort 1.4a, and 1x USB Type-C, while the Pro 5500 XT has no outputs. The RX 6900 XT uses a PCIe 4.0 x16 interface, while the Pro 5500 XT uses PCIe 4.0 x8. The RX 6900 XT was released on 2020-10-27 with a launch MSRP of 999 USD, while the Pro 5500 XT was released on 2020-08-03 with no launch MSRP listed.

Architecture Differences

The RX 6900 XT is built on the RDNA 2.0 architecture using the Navi 21 chip, while the Pro 5500 XT uses RDNA 1.0 with the Navi 14 chip. This architectural generation gap explains many of the performance differences. The RX 6900 XT is part of the Navi II (RX 6000) generation, while the Pro 5500 XT belongs to the Radeon Pro Mac (Navi Series) generation. Both use a 7 nm process from TSMC, but the RX 6900 XT packs 26,800 million transistors on a 520 mm² die, achieving a density of 51.5 million transistors per square millimeter. The Pro 5500 XT has 6,400 million transistors on a 158 mm² die, with a density of 40.5 million per square millimeter.

The RX 6900 XT’s RDNA 2.0 architecture brings hardware ray tracing support with 80 dedicated RT cores, a feature entirely absent from the RDNA 1.0-based Pro 5500 XT. This is a fundamental architectural difference, not just a specification gap. The RX 6900 XT also supports DirectX 12 Ultimate (12_2), which includes features like mesh shaders and variable rate shading, while the Pro 5500 XT is limited to DirectX 12 (12_1). Both GPUs support OpenGL 4.6 and Vulkan 1.4. The RX 6900 XT’s predecessor is listed as Navi and its successor as Navi III, while the Pro 5500 XT has no listed predecessor or successor. The RX 6900 XT is the newer design in terms of transistor count and die area, but both are marked as end-of-life production status. The architectural differences—RDNA 2.0 versus RDNA 1.0, 80 RT cores versus none, and a 4x difference in shading units—collectively account for the dramatic performance deltas observed in the benchmark data.