AMD Radeon PRO W7800 vs AMD Radeon RX 6650M XT Comparison

Head-to-Head Benchmarks

The database contains a single direct comparison between these two GPUs: the Geekbench OpenCL test. In this benchmark, the AMD Radeon PRO W7800 records a score of 154,366, while the AMD Radeon RX 6650M XT scores 76,904. This gives the PRO W7800 a decisive delta of 100.7%, meaning it more than doubles the mobile GPU's raw compute throughput in this workload. The margin is substantial enough that no further benchmark sampling is required to establish a clear performance hierarchy between the two parts.

Context from the nearest rivals reinforces how each card sits in its respective tier. The PRO W7800's average benchmark score is 164,894, placing it at the 97th percentile among all GPUs in the database. Its closest competitor, the NVIDIA RTX A5500, posts an average score of 165,217, which is only 0.2% higher. The RTX 4500 Ada Generation is 0.7% higher at 166,094, while the AMD Radeon Pro W6900X leads by 2.2% at 168,574. The PRO W7800 also sits ahead of the NVIDIA A100 PCIe 40 GB by 1.5%, with that rival averaging 162,504. These figures indicate that the PRO W7800 is not merely faster than the RX 6650M XT; it is operating in a performance class that sits within a few percentage points of workstation GPUs that cost considerably more.

The RX 6650M XT, by contrast, has an average benchmark score of 76,904 and sits at the 91st percentile. Its nearest rivals are all within a narrow band: the NVIDIA GeForce RTX 5090 D is 1% higher at 77,712, the AMD Radeon RX 6850M XT is 2.6% higher at 78,940, and the NVIDIA Tesla P100 variants are 3.1% and 3.4% higher at 79,396 and 79,605 respectively. The RX 6650M XT is therefore competitive within its mobile segment, but that segment is operating at roughly half the absolute performance level of the PRO W7800. The delta between the two cards in the head-to-head test is larger than any gap observed between the PRO W7800 and its own rivals, which underscores the generational and market-tier gulf between them.

Architecture Differences

The architectural divide between these two GPUs is significant and explains much of the performance delta. The AMD Radeon PRO W7800 uses the Navi 31 chip built on RDNA 3.0 architecture, with the codename Plum Bonito, and belongs to the Radeon Pro Navi (Navi III Series) generation. It is fabricated on a 5 nm process at TSMC, with a transistor count of 57,700 million on a 529 mm² die, yielding a transistor density of 109.1 million transistors per mm². The AMD Radeon RX 6650M XT, in contrast, uses the Navi 23 chip based on RDNA 2.0 architecture, from the Navi Mobile (RX 6000M) generation. It is built on a 7 nm process, also at TSMC, with 11,060 million transistors on a 237 mm² die, giving a density of 46.7 million transistors per mm². The PRO W7800 therefore packs more than five times the transistor count into a die that is more than twice the area, with more than double the transistor density.

Compute resources follow a similar pattern. The PRO W7800 has 4,480 shading units, 280 texture mapping units, 128 render output units, and 70 ray tracing cores. The RX 6650M XT has 2,048 shading units, 128 TMUs, 64 ROPs, and 32 ray tracing cores. In every category, the desktop workstation card has more than double the hardware of the mobile part. The FP32 throughput reflects this: 45.25 TFLOPS for the PRO W7800 versus 9.896 TFLOPS for the RX 6650M XT. FP16 performance is 90.50 TFLOPS (2:1) for the PRO W7800 and 19.79 TFLOPS (2:1) for the mobile GPU.

Clock speeds tell a more nuanced story. The RX 6650M XT has a higher base clock of 2,068 MHz compared to 1,895 MHz on the PRO W7800, and its game clock is 2,162 MHz. The boost clocks are closer: 2,416 MHz for the mobile chip versus 2,525 MHz for the workstation card. The PRO W7800 compensates for its lower base frequency with far more compute units, which is why its pixel rate reaches 323.2 GPixel/s and texture rate hits 707.0 GTexel/s, while the RX 6650M XT manages 154.6 GPixel/s and 309.2 GTexel/s respectively.

Memory capacity and bandwidth differ by a factor of 2. The PRO W7800 comes with 32 GB of GDDR6 memory on a 256 bit bus width, delivering 576.0 GB/s of bandwidth, with memory clocked at 2,250 MHz (18 Gbps effective). The RX 6650M XT has 8 GB of GDDR6 memory on a 128 bit bus, providing 256.2 GB/s of bandwidth at 2,000 MHz (16 Gbps effective). Both GPUs support PCIe 4.0, with the PRO W7800 using x16 lanes and the RX 6650M XT using x8 lanes. The PRO W7800 also supports a 260 W TDP with 2x 8-pin power connectors, dual-slot width, and a suggested PSU of 600 W, while the RX 6650M XT operates at 120 W, with no power connectors, IGP slot width, and no suggested PSU listed. Both support DirectX 12 Ultimate (12_2, OpenGL 4.6, and Vulkan 1.4. The PRO W7800 has a length of 280 mm (11 inches), height of 110 mm (4.3 inches), width of 40 mm (1.6 inches), and display outputs of 3x DisplayPort 2.1 plus 1x mini-DisplayPort 2.1, while the RX 6650M XT has display outputs marked Portable Device Dependent.

The PRO W7800 is smaller in length at 280 mm versus 11 inches, height at 110 mm versus 4.3 inches, and width at 40 mm; the mobile part has no dimensions listed. The PRO W7800 launched on 2023-04-12T17:00:00.000Z, with a launch MSRP of 2,499 USD. The RX 6650M XT launched on 2022-01-03T17:00:00.000Z, with no launch MSRP. The PRO W7800 predecessor is the Radeon Pro Vega, while the RX 6650M XT predecessor is the Polaris Mobile. The RX 6650M XT production status is End-of-life, while the PRO W7800 is Active.

Where Each One Wins

The PRO W7800 wins the only recorded head-to-head benchmark, so the data-based answer is that it wins in the Geekbench OpenCL compute workload. This is a general-purpose compute test, which aligns with the PRO W7800's positioning as a workstation card. Its 32 GB memory capacity and 576.0 GB/s bandwidth suggest suitability for large datasets, and its 70 RT cores and 4,480 shading units make it capable of heavy parallel workloads. The 97th percentile ranking among all GPUs, with an average score of 164,894, places it among the top tier of accelerators in the database, within 0.2% of the RTX A5500 and 0.7% of the RTX 4500 Ada Generation.

The RX 6650M XT wins no recorded head-to-head benchmarks against the PRO W7800. However, its 91st percentile ranking and an average score of 76,904 show that it is still a capable mobile part, sitting within 1% of the RTX 5090 D in the database. Its advantage is not in raw performance but in physical characteristics: it has no power connectors, an IGP slot width, and no dimensions listed, which indicates a design intended for laptop integration. The RX 6650M XT's 120 W TDP is less than half of the PRO W7800's 260 W, and its base clock is higher at 2,068 MHz versus 1,895 MHz, though that does not translate into a benchmark win. The mobile card's 8 GB memory and 256.0 GB/s bandwidth are modest but appropriate for its form factor.

For use cases, the data suggests that the PRO W7800 is the choice for compute-heavy, memory-intensive workstation tasks such as rendering, simulation, or large model inference, where 32 GB capacity and 576.0 GB/s bandwidth matter. The RX 6650M XT, with its end-of-life status and mobile form factor, is better suited to scenarios where power draw and physical footprint are constrained, though its single recorded benchmark shows roughly half the performance. The PRO W7800 also has a wider display output configuration with 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1, which is typical for desktop workstation use, whereas the mobile part's outputs are listed as portable device dependent.

FAQ

Q: Which GPU is faster in the Geekbench OpenCL benchmark?

A: The AMD Radeon PRO W7800 scores 154,366, while the AMD Radeon RX 6650M XT scores 76,904. This gives the PRO W7800 a 100.7% delta, meaning it is about twice as fast in this test.

Q: How do these GPUs compare to their nearest rivals in the database?

A: The PRO W7800 has an average score of 164,894, which is 0.2% lower than the NVIDIA RTX A5500, 0.7% lower than the RTX 4500 Ada Generation, 1.5% higher than the A100 PCIe 40 GB, and 2.2% lower than the Radeon Pro W6900X. The RX 6650M XT has an average score of 76,904, which is 1% lower than the RTX 5090 D, 2.6% lower than the RX 6850M XT, 3.1% lower than the Tesla P100 PCIe 12 GB, and 3.4% lower than the Tesla P100 PCIe 16 GB.

Q: What are the architectural differences between the two GPUs?

A: The PRO W7800 uses Navi 31 on RDNA 3.0 with a 5 nm process, 57,700 million transistors, and a 529 mm² die. The RX 6650M XT uses Navi 23 on RDNA 2.0 with a 7 nm process, 11,060 million transistors, and a 237 mm² die. The PRO W7800 has 4,480 shading units, 280 TMUs, 128 ROPs, and 70 RT cores, while the RX 6650M XT has 2,048 shading units, 128 TMUs, 64 ROPs, and 32 RT cores.

Q: How do memory configurations differ?

A: The PRO W7800 has 32 GB of GDDR6 on a 256 bit bus with 576.0 GB/s bandwidth. The RX 6650M XT has 8 GB of GDDR6 on a 128 bit bus with 256.0 GB/s bandwidth. Both use GDDR6, but the PRO W7800 has four times the capacity and more than double the bandwidth.

Q: What is the production status and release timeframe for each?

A: The PRO W7800 is listed as Active and was released on 2023-04-12T17:00:00.000Z. The RX 6650M XT is listed as End-of-life and was released on 2022-01-03T17:00:00.000Z.

Q: Which GPU has better percentile ranking among all GPUs?

A: The PRO W7800 is at the 97th percentile, while the RX 6650M XT is at the 91st percentile. The PRO W7800's average benchmark score is 164,894 versus 76,904 for the RX 6650M XT.

The Verdict

The AMD Radeon PRO W7800 is the clear winner in every measured aspect of performance. Its Geekbench OpenCL score of 154,366 is 100.7% higher than the RX 6650M XT's 76,904, and its 97th percentile ranking places it among the top GPUs in the database. The 32 GB memory capacity, 576.0 GB/s bandwidth, and 45.25 TFLOPS of FP32 throughput make it suited for workstation-class compute workloads, and its active production status indicates continued availability.

The AMD Radeon RX 6650M XT, while less powerful, is not without merit in its own context. Its 91st percentile ranking and average score of 76,904 place it within a few percentage points of competitors like the RTX 5090 D, and its 120 W TDP with no power connectors and IGP form factor make it a mobile-oriented part. Its end-of-life status, however, limits its long-term relevance.

For users seeking maximum compute performance, memory capacity, and bandwidth, the data points unequivocally to the PRO W7800. For scenarios requiring a low-power, mobile-integrated GPU, the RX 6650M XT remains a reasonable option, but it cannot match the PRO W7800 in any recorded benchmark. The choice, based strictly on the recorded numbers, is the PRO W7800 for performance and the RX 6650M XT only where its mobile characteristics are a hard requirement.