AMD Radeon RX 6650M vs NVIDIA GB10 Comparison

Where Each One Wins

The benchmark split is stark. The NVIDIA GB10 wins both recorded tests in the database, with no category favoring the AMD Radeon RX 6650M. However, the margins differ substantially between the two workloads, which reveals different strengths in each part.

The GB10's largest advantage appears in Geekbench OpenCL, where it scores 120,137 against the RX 6650M's 65,800. That is a 82.6% delta, a massive gap that points to the GB10 being far more capable in compute-oriented OpenCL workloads. The RX 6650M is not close here, and the data suggests that any task heavily reliant on OpenCL compute will favor the NVIDIA part overwhelmingly.

The Vulkan result tells a different story. The GB10 still wins, scoring 114,648 to the RX 6650M's 77,735, but the delta shrinks to 47.5%. While still a decisive victory, the smaller margin indicates that the AMD part is relatively stronger in Vulkan than in OpenCL. The RX 6650M's RDNA 2.0 architecture with its native DirectX 12 Ultimate support may contribute to this comparatively tighter gap, though the GB10 remains ahead nonetheless.

In terms of overall average benchmark score, the GB10 sits at 117,393, placing it in the 95th percentile of all GPUs in the database. The RX 6650M averages 71,768, which lands in the 91st percentile. Both are high-performing parts relative to the full database, but the GB10 occupies a clearly higher tier.

For use-case planning, the data points to the GB10 as the choice for compute-heavy applications, especially those using OpenCL. The RX 6650M, while behind in both tests, is comparatively less disadvantaged in Vulkan, so users locked into Vulkan-based workloads would see a smaller gap than those running OpenCL tasks.

Architecture Differences

The two GPUs come from fundamentally different design philosophies. The GB10 is built on NVIDIA's Blackwell 2.0 architecture, fabricated on a 5 nm process at TSMC. The RX 6650M uses AMD's RDNA 2.0 architecture on a 7 nm process, also from TSMC. The process node difference gives the GB10 a density advantage from the start, though the RX 6650M's transistor density is recorded at 46.7M per mm².

The GB10's chip, designated GB20B, has a die size of 382 mm². The RX 6650M's Navi 23 die is 237 mm² with 11,060 million transistors. The GB10's transistor count is listed as unknown in the database, but its larger die and newer process node suggest a substantially more complex design.

Memory configuration is where the gap becomes extreme. The GB10 carries 128 GB of LPDDR5X on a 256 bit bus, delivering 273.2 GB/s of bandwidth. The RX 6650M has 8 GB of GDDR6 on a 128 bit bus, providing 224.0 GB/s. The GB10 has 16 times the memory capacity, though only about 22% more bandwidth. For workloads that need large working sets, the GB10 is in a different class entirely.

Compute resources diverge sharply. The GB10 has 6,144 shading units, 384 TMUs, 48 ROPs, 48 RT cores, and 384 tensor cores. The RX 6650M has 1,792 shading units, 112 TMUs, 64 ROPs, and 28 RT cores, with no tensor cores listed. The GB10's shading unit count is roughly 3.4 times higher, and its TMU count is similarly elevated at 3.4 times. Interestingly, the RX 6650M has more ROPs at 64 versus 48, which contributes to its higher pixel rate.

Clock speeds are close at the top end. The GB10 boosts to 2418 MHz, while the RX 6650M boosts to 2416 MHz. The AMD part has a higher base clock at 2068 MHz versus 1665 MHz, and it also lists a game clock of 2222 MHz. The GB10's memory runs at 1067 MHz with 8.5 Gbps effective, while the RX 6650M's memory runs at 1750 MHz with 14 Gbps effective, though the narrower bus limits overall bandwidth.

The throughput numbers reflect the resource disparity. The GB10 delivers 29.71 TFLOPS of FP32 and the same 29.71 TFLOPS of FP16 at a 1:1 ratio. The RX 6650M delivers 8.659 TFLOPS of FP32 and 17.32 TFLOPS of FP16 at a 2:1 ratio. The GB10's FP32 throughput is about 3.4 times higher, matching its shading unit advantage. Texture rate shows a similar pattern: 928.5 GTexel/s for the GB10 versus 270.6 GTexel/s for the RX 6650M. Pixel rate, however, favors the AMD part at 154.6 GPixel/s versus 116.1 GPixel/s, due to its higher ROP count.

Power and interface differences are notable. The GB10 has a 140 W TDP with a suggested PSU of 300 W, while the RX 6650M has a 120 W TDP with no suggested PSU listed. Both are IGP slot designs with no power connectors. The GB10 uses PCIe 5.0 x16, while the RX 6650M uses PCIe 4.0 x8. Display outputs are minimal on the GB10 with a single HDMI, while the RX 6650M's outputs are listed as portable device dependent.

API support is a major differentiator. The RX 6650M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The GB10's API support is listed as N/A for DirectX, OpenGL, and Vulkan. This is a critical consideration: the GB10 is a server-oriented part, while the RX 6650M is a mobile gaming GPU with full graphics API support. The GB10's benchmark scores come from compute-focused tests, not from gaming workloads.

Production status also differs. The GB10 is listed as Active with a release date of October 2025, while the RX 6650M is End-of-life with a January 2022 release. The GB10's predecessor is Server Hopper and its successor is Server Rubin. The RX 6650M's predecessor is Polaris Mobile and it has no successor listed.

Head-to-Head Benchmarks

The Geekbench OpenCL test is the GB10's strongest showing. It scores 120,137 against 65,800 for the RX 6650M, a delta of 82.6%. This is more than a simple win; it is a near-doubling of the AMD part's score. The GB10's 29.71 TFLOPS of FP32 compute, combined with its 384 tensor cores and massive memory pool, likely drives this result. The RX 6650M's 8.659 TFLOPS of FP32 is simply outmatched in raw compute throughput.

In Geekbench Vulkan, the margin narrows but the outcome is the same. The GB10 scores 114,648, while the RX 6650M scores 77,735, a delta of 47.5%. The RX 6650M's Vulkan 1.4 support and RDNA 2.0 architecture help it close some of the gap, but the GB10's sheer compute resources still carry it to victory. The 47.5% delta is still a dominant win, but it is notably smaller than the OpenCL margin.

The average benchmark score of 117,393 for the GB10 sits close to its per-test results, indicating consistency across both workloads. The RX 6650M's average of 71,768 falls between its two test scores, which is expected given the 65,800 OpenCL and 77,735 Vulkan results.

Looking at the nearest rivals in the database adds context. The GB10's closest competitor is the AMD Radeon PRO W7700, which averages 118,976, putting the GB10 1.3% behind it. The GB10 is 0.3% ahead of the NVIDIA RTX 4000 SFF Ada Generation, 2.6% ahead of the NVIDIA Tesla V100 SXM2 16 GB, and 3% ahead of the NVIDIA RTX A5500 Mobile. These are tight margins, all within single digits, suggesting the GB10 sits in a competitive performance band despite its architectural distinctiveness.

The RX 6650M's nearest rivals cluster around its 71,768 average. It is 0.5% behind the NVIDIA TITAN X Pascal, 0.8% behind the AMD Radeon Pro Vega 64, 1.3% ahead of the AMD Radeon RX 6600 LE, and 2.2% behind the AMD Radeon Vega Frontier Edition. All deltas are within a narrow range, indicating that the RX 6650M's performance level is well established in this segment.

FAQ

Q: Which GPU is faster in OpenCL workloads?

A: The NVIDIA GB10 scores 120,137 in Geekbench OpenCL, which is 82.6% higher than the AMD Radeon RX 6650M's 65,800. The GB10 wins this test decisively.

Q: How do the two GPUs compare in Vulkan performance?

A: The GB10 scores 114,648 in Geekbench Vulkan, beating the RX 6650M's 77,735 by 47.5%. The GB10 wins, but the margin is smaller than in OpenCL.

Q: What are the memory specifications for each GPU?

A: The GB10 has 128 GB of LPDDR5X on a 256 bit bus with 273.2 GB/s bandwidth. The RX 6650M has 8 GB of GDDR6 on a 128 bit bus with 224.0 GB/s bandwidth.

Q: Does the RX 6650M support modern graphics APIs?

A: Yes, the RX 6650M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The GB10 lists N/A for DirectX, OpenGL, and Vulkan support.

Q: What is the average benchmark score for each GPU?

A: The GB10 has an average benchmark score of 117,393, placing it in the 95th percentile of all GPUs. The RX 6650M averages 71,768, placing it in the 91st percentile.

Q: How does the GB10 compare to its nearest rivals?

A: The GB10 is 1.3% behind the AMD Radeon PRO W7700, 0.3% ahead of the NVIDIA RTX 4000 SFF Ada Generation, 2.6% ahead of the NVIDIA Tesla V100 SXM2 16 GB, and 3% ahead of the NVIDIA RTX A5500 Mobile.

The Verdict

The data presents a clear hierarchy. The NVIDIA GB10 outperforms the AMD Radeon RX 6650M in both recorded benchmarks, with wins in Geekbench OpenCL (82.6% delta) and Geekbench Vulkan (47.5% delta). Its average benchmark score of 117,393 versus 71,768 places it 95th percentile against the RX 6650M's 91st percentile.

For compute-focused workloads, particularly those using OpenCL, the GB10 is the obvious choice. Its 29.71 TFLOPS of FP32, 128 GB of memory, and 384 tensor cores provide a level of resource that the RX 6650M cannot approach. The GB10 also has a higher TDP at 140 W versus 120 W, and it uses PCIe 5.0 x16 compared to PCIe 4.0 x8, which may matter for data transfer intensive tasks.

However, the RX 6650M has its own territory. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the GB10 lists no graphics API support. The RX 6650M also has a higher pixel rate at 154.6 GPixel/s versus 116.1 GPixel/s, and a higher base clock at 2068 MHz versus 1665 MHz. Its smaller 7 nm die at 237 mm² with 11,060 million transistors is more modest but also more power efficient per unit of silicon area.

The GB10's nearest rivals in the database are all within a 3% band, with the AMD Radeon PRO W7700 slightly ahead at 118,976 and the NVIDIA RTX A5500 Mobile slightly behind at 113,944. This suggests the GB10 is competitively positioned among workstation and server class GPUs. The RX 6650M's rivals are similarly clustered, with the AMD Radeon Vega Frontier Edition leading at 73,370 and the AMD Radeon RX 6600 LE trailing at 70,829.

Users who need massive memory capacity, high FP32 throughput, and tensor core acceleration should select the GB10. Users who need a mobile GPU with modern graphics API support and full DirectX 12 Ultimate compatibility should select the RX 6500M. The GB10 is the one to pick for compute density and raw throughput. The RX 6650M is the one to pick for a more balanced mobile part with graphics API coverage. The benchmark record is unambiguous: 2 wins for the GB10, 0 wins for the RX 6650M. The verdict follows the numbers exactly.