AMD Radeon PRO W7900 vs AMD Radeon RX 6650M XT Comparison

Head-to-Head Benchmarks

The only direct benchmark comparison recorded in the database is the Geekbench OpenCL test, and the AMD Radeon PRO W7900 takes that win decisively. The W7900 scores 84,379, while the RX 6650M XT scores 76,904, producing a 9.7% delta in favor of the workstation card. That is a meaningful margin, though not a blowout; it places the two cards in overlapping performance territory for compute workloads rather than separate leagues.

Looking at the broader picture, the W7900's average benchmark score of 110,725 sits at the 94th percentile of all GPUs, while the RX 6650M XT's average of 76,904 lands at the 91st percentile. The percentile gap is narrow (three points), which underscores that both cards are high-end performers in their respective contexts, but the W7900's raw average is roughly 44% higher. The W7900 also has a second recorded benchmark, Geekbench Vulkan at 137,070, which the RX 6650M XT has no comparable entry for in this dataset.

The nearest rivals for each card further contextualize the head-to-head result. The W7900's closest competitor is the AMD Radeon Pro Vega II with an average score of 109,617 (a 1% delta), followed by the AMD Radeon Pro W6600X at 107,342 (3.2% ahead), the NVIDIA RTX A5500 Mobile at 113,944 (2.8% behind), and the NVIDIA Tesla V100 SXM2 16 GB at 114,395 (3.2% behind). The RX 6650M XT's nearest rivals cluster tightly around its score: the NVIDIA GeForce RTX 5090 D at 77,712 (1% behind the AMD card), the AMD Radeon RX 6850M XT at 78,940 (2.6% behind), and the NVIDIA Tesla P100 PCIe 12 GB and 16 GB variants at 79,396 and 79,605 respectively (3.1% and 3.4% behind). What this means is that the RX 6650M XT, despite being a mobile part with far fewer resources, is competitive with some of the most powerful desktop and workstation GPUs of its era, whereas the W7900 is trading blows with professional-grade accelerators that cost multiples of its launch MSRP.

Architecture Differences

The architectural divide here is generational and fundamental. The W7900 uses the Navi 31 chip on the RDNA 3.0 architecture, built on TSMC's 5 nm process, while the RX 6650M XT uses the Navi 23 chip on RDNA 2.0, built on TSMC's 7 nm process. That process gap (5 nm versus 7 nm) explains much of the density and efficiency difference: the W7900 packs 57,700 million transistors into a 529 mm² die for a density of 109.1 million transistors per square millimeter, whereas the RX 6650M XT fits 11,060 million transistors into 237 mm², a density of 46.7 million per square millimeter. The W7900 has over five times the transistor count and more than double the die area.

The compute resources scale accordingly. The W7900 fields 6,144 shading units, 384 texture mapping units, 192 raster operation units, and 96 ray tracing cores. The RX 6650M XT has 2,048 shading units, 128 TMUs, 64 ROPs, and 32 ray tracing cores. That is a 3x advantage in shading units and TMUs, a 3x advantage in ray tracing cores, and a 3x advantage in ROPs. The FP32 throughput tells a similar story: the W7900 delivers 61.32 TFLOPS, while the RX 6650M XT manages 9.896 TFLOPS, a ratio of roughly 6.2 to 1. Notably, the W7900's FP16 performance equals its FP32 at 61.32 TFLOPS (1:1 ratio), while the RX 6650M XT's FP16 is 19.79 TFLOPS, which is a 2:1 ratio over its FP32. This means the W7900 has no FP16 advantage over FP32, whereas the RX 6650M XT doubles its throughput when using FP16 instructions.

Memory architecture is another major differentiator. The W7900 ships with 48 GB of GDDR6 on a 384-bit bus, yielding 864.0 GB/s of bandwidth. The RX 6650M XT has 8 GB of GDDR6 on a 128-bit bus, yielding 256.0 GB/s. That is a 6x capacity advantage and a 3.4x bandwidth advantage for the W7900. Clock speeds are more nuanced: the RX 6650M XT has a higher base clock (2,068 MHz versus 1,760 MHz) and a higher game clock (2,162 MHz versus null for the W7900), but the W7900's boost clock is higher (2,495 MHz versus 2,416 MHz). The memory clocks are 2,250 MHz (18 Gbps effective) for the W7900 and 2,000 MHz (16 Gbps effective) for the RX 6650M XT.

Where Each One Wins

The W7900 wins in every scenario where raw compute throughput, memory capacity, or memory bandwidth is the limiting factor. Its 48 GB frame buffer is six times larger than the RX 6650M XT's 8 GB, which makes it suitable for massive data sets, high-resolution rendering, or large language model inference that would exceed the mobile card's capacity. Its 864.0 GB/s bandwidth is over three times the RX 6650M XT's 256.0 GB/s, so bandwidth-bound workloads like 4K texture streaming or multi-display output will see a substantial advantage. The FP32 throughput of 61.32 TFLOPS is more than six times the RX 6650M XT's 9.896 TFLOPS, so any compute-heavy task, from scientific simulation to video encoding, will favor the W7900. The W7900 also has triple-slot cooling and dual 8-pin power connectors, indicating it is designed for sustained, high-intensity workloads in a workstation chassis.

The RX 6650M XT's wins are narrower but real. It is an integrated graphics processor (IGP) with no power connectors and a 120 W TDP, versus the W7900's 295 W TDP and triple-slot cooler. That makes it dramatically easier to deploy in portable systems, and its higher base clock (2,068 MHz) and game clock (2,162 MHz) suggest it can hit competitive performance per watt in short bursts. Its nearest rival data shows it is only 1% behind the NVIDIA GeForce RTX 5090 D and 2.6% behind the AMD Radeon RX 6850M XT, which are both higher-power parts. For a mobile GPU, that is remarkable efficiency. The RX 6650M XT's FP16 advantage (2:1 ratio versus the W7900's 1:1) means it can double its throughput on FP16 workloads, which could close the gap in AI inference or certain graphics effects that use FP16 precision.

Specification Differences

The two cards differ across nearly every specification field. Process node: 5 nm for the W7900, 7 nm for the RX 6650M XT. Transistor count: 57,700 million versus 11,060 million. Die size: 529 mm² versus 237 mm². Transistor density: 109.1M per mm² versus 46.7M per mm². Base clock: 1,760 MHz versus 2,068 MHz. Boost clock: 2,495 MHz versus 2,416 MHz. Game clock: null for the W7900, 2,162 MHz for the RX 6650M XT. Memory clock: 2,250 MHz (18 Gbps effective) versus 2,000 MHz (16 Gbps effective). Memory size: 48 GB versus 8 GB. Memory bus width: 384-bit versus 128-bit. Memory bandwidth: 864.0 GB/s versus 256.0 GB/s. Shading units: 6,144 versus 2,048. TMUs: 384 versus 128. ROPs: 192 versus 64. Ray tracing cores: 96 versus 32. Pixel rate: 479.0 GPixel/s versus 154.6 GPixel/s. Texture rate: 958.1 GTexel/s versus 309.2 GTexel/s. FP32: 61.32 TFLOPS versus 9.896 TFLOPS. FP16: 61.32 TFLOPS (1:1) versus 19.79 TFLOPS (2:1). TDP: 295 W versus 120 W. Slot width: triple-slot versus IGP. Power connectors: 2x 8-pin versus none. Suggested PSU: 600 W versus null. Bus interface: PCIe 4.0 x16 versus PCIe 4.0 x8. Display outputs: 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1 versus portable device dependent.

The production status also differs: the W7900 is active, while the RX 6650M XT is end-of-life. Release dates are about 16 months apart, with the W7900 launching on May 25, 2023, and the RX 6650M XT on January 3, 2022. The W7900's launch MSRP is 3,999 USD; the RX 6650M XT has no recorded launch MSRP. The W7900's predecessor is the Radeon Pro Vega, while the RX 6650M XT's predecessor is the Polaris Mobile. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

FAQ

Q: Which card has more memory?

A: The AMD Radeon PRO W7900 has 48 GB of GDDR6, while the AMD Radeon RX 6650M XT has 8 GB of GDDR6, a 6x capacity difference.

Q: What is the performance gap in the only shared benchmark?

A: In Geekbench OpenCL, the W7900 scores 84,379 versus the RX 6650M XT's 76,904, giving the W7900 a 9.7% lead.

Q: Are both cards based on the same architecture?

A: No. The W7900 uses RDNA 3.0 with the Navi 31 chip, while the RX 6650M XT uses RDNA 2.0 with the Navi 23 chip.

Q: Which card has a higher boost clock?

A: The W7900 has a boost clock of 2,495 MHz, slightly higher than the RX 6650M XT's 2,416 MHz.

Q: What is the power draw difference?

A: The W7900 has a TDP of 295 W and requires 2x 8-pin power connectors and a 600 W suggested PSU. The RX 6650M XT has a 120 W TDP and no power connectors.

Q: Is one card still in production?

A: Yes. The W7900 is listed as active, while the RX 6650M XT is end-of-life.

The Verdict

The data points to a clear split: the AMD Radeon PRO W7900 is the superior performer for demanding professional workloads, while the AMD Radeon RX 6650M XT is the practical choice for mobile systems where power and space are constrained. The W7900 wins the only head-to-head benchmark by 9.7%, but its advantages extend far beyond that single test. Its 61.32 TFLOPS of FP32 compute, 48 GB of memory, and 864.0 GB/s of bandwidth put it in a different performance class for any workload that scales with compute or memory capacity. Its 94th percentile ranking and average score of 110,725, which is 44% higher than the RX 6650M XT's average, confirm that it belongs among the top-tier workstation GPUs.

The RX 6650M XT, despite its end-of-life status, is not a weak card. Its 91st percentile ranking and 76,904 average score place it just behind the NVIDIA GeForce RTX 5090 D in the database's nearest rival list. Its 120 W TDP and IGP form factor make it deployable in laptops, and its higher base and game clocks suggest it can punch above its weight in short-duration workloads. For users who need a portable GPU with solid compute performance, the RX 6650M XT is the only viable choice between these two, since the W7900 is a triple-slot card with a 600 W power supply requirement.

For workstation users, the W7900's launch MSRP of 3,999 USD reflects its positioning as a professional tool, and its active production status means it remains available. The RX 6650M XT has no recorded MSRP and is no longer produced. The verdict is straightforward: choose the W7900 for maximum compute, memory, and bandwidth in a desktop workstation; choose the RX 6650M XT for a mobile system that needs respectable performance within a 120 W envelope. There is no scenario where the RX 6650M XT outperforms the W7900 in the recorded data, so the deciding factor is deployment context rather than raw capability.