AMD Radeon RX 6650M XT vs NVIDIA RTX 6000 Ada Generation Comparison

Head-to-Head Benchmarks

The database contains a single direct benchmark comparison between these two GPUs, and the result is decisive. In the Geekbench OpenCL test, the NVIDIA RTX 6000 Ada Generation scored 311,629 points, while the AMD Radeon RX 6650M XT managed 76,904 points. That represents a 305.2% advantage for the NVIDIA part, meaning the RTX 6000 Ada Generation delivers roughly four times the compute throughput of the mobile AMD GPU in this workload. This is not a marginal gap; it is a category-level difference in raw performance.

Looking at the broader benchmark context, the NVIDIA card’s average benchmark score is 287,237, which places it in the 99th percentile of all GPUs in the database. Its nearest rivals include the NVIDIA L40 at 284,111 (1.1% slower), the NVIDIA L40S at 295,763 (2.9% faster), the AMD Instinct MI300X at 317,994 (9.7% faster), and the NVIDIA L20 at 251,147 (14.4% slower). These figures show the RTX 6000 Ada Generation sits in a tight performance cluster among high-end workstation and accelerator cards, with only the MI300X clearly ahead.

The AMD Radeon RX 6650M XT, by contrast, posts a 91st percentile ranking with an average benchmark score of 76,904. Its nearest rivals are much closer in performance: the NVIDIA GeForce RTX 5090 D scores 77,712 (1% faster), the AMD Radeon RX 6850M XT scores 78,940 (2.6% faster), and both the NVIDIA Tesla P100 PCIe 12 GB and 16 GB versions score 79,396 and 79,605 respectively (3.1% and 3.4% faster). This indicates the RX 6650M XT is competitive within its own mobile GPU segment, but that segment operates at a completely different performance level than the workstation-class NVIDIA part.

The head-to-head delta of 305.2% is the single most important data point here. No other benchmark in the database pits these two directly against each other, so the OpenCL result stands as the definitive measure. In practical terms, the RTX 6000 Ada Generation’s 91.06 TFLOPS of FP32 compute far outstrips the RX 6650M XT’s 9.896 TFLOPS, and the 48 GB of GDDR6 memory with 960.0 GB/s of bandwidth dwarfs the 8 GB and 256.0 GB/s of the AMD part. These architectural resources translate directly into the benchmark gap observed.

FAQ

Q: Which GPU wins in the only direct benchmark available?

A: The NVIDIA RTX 6000 Ada Generation wins the Geekbench OpenCL test with 311,629 points versus 76,904 for the AMD Radeon RX 6650M XT, a 305.2% difference.

Q: How does each GPU rank among all GPUs in the database?

A: The RTX 6000 Ada Generation sits in the 99th percentile with an average score of 287,237. The RX 6650M XT is in the 91st percentile with an average score of 76,904.

Q: What are the closest competitors for the NVIDIA card?

A: The nearest rivals are the NVIDIA L40 (284,111, 1.1% slower), NVIDIA L40S (295,763, 2.9% faster), AMD Instinct MI300X (317,994, 9.7% faster), and NVIDIA L20 (251,147, 14.4% slower).

Q: What are the closest competitors for the AMD card?

A: The nearest rivals are the NVIDIA GeForce RTX 5090 D (77,712, 1% faster), AMD Radeon RX 6850M XT (78,940, 2.6% faster), NVIDIA Tesla P100 PCIe 12 GB (79,396, 3.1% faster), and NVIDIA Tesla P100 PCIe 16 GB (79,605, 3.4% faster).

Q: Which GPU has higher FP32 compute throughput?

A: The RTX 6000 Ada Generation delivers 91.06 TFLOPS of FP32 performance, while the RX 6650M XT offers 9.896 TFLOPS. The NVIDIA card also provides FP16 at the same 91.06 TFLOPS (1:1 ratio), whereas the AMD card reaches 19.79 TFLOPS FP16 (2:1 ratio).

Q: How do memory configurations compare?

A: The NVIDIA card has 48 GB of GDDR6 on a 384-bit bus with 960.0 GB/s bandwidth. The AMD card has 8 GB of GDDR6 on a 128-bit bus with 256.0 GB/s bandwidth.

Architecture Differences

The two GPUs come from fundamentally different design philosophies. The NVIDIA RTX 6000 Ada Generation uses the AD102 chip built on a 5 nm process at TSMC, with 76,300 million transistors packed into a 609 mm² die. The transistor density is 125.3 million per square millimeter. The AMD Radeon RX 6650M XT uses the Navi 23 chip on a 7 nm process, also from TSMC, but with only 11,060 million transistors on a 237 mm² die, resulting in a density of 46.7 million per square millimeter. This means the NVIDIA chip has nearly seven times the transistor count and roughly 2.6 times the die area.

The compute resource disparity is enormous. The RTX 6000 Ada Generation contains 18,176 shading units, 568 texture mapping units, 192 raster operation pipelines, 142 ray tracing cores, and 568 tensor cores. The RX 6650M XT has 2,048 shading units, 128 TMUs, 64 ROPs, and 32 ray tracing cores, with no tensor cores listed. These numbers explain the pixel rate and texture rate differences: the NVIDIA card achieves 481.0 GPixel/s and 1,422.8 GTexel/s, while the AMD card manages 154.6 GPixel/s and 309.2 GTexel/s.

Memory architecture also diverges sharply. The NVIDIA part uses a 384-bit memory bus with 48 GB of GDDR6 at 20 Gbps effective speed, yielding 960.0 GB/s of bandwidth. The AMD part uses a 128-bit bus with 8 GB of GDDR6 at 16 Gbps effective, for 256.0 GB/s. The clock speeds tell an interesting story: the AMD card actually runs higher base and boost clocks (2,068 MHz base, 2,416 MHz boost, 2,162 MHz game clock) compared to the NVIDIA card (915 MHz base, 2,505 MHz boost). However, the NVIDIA card’s massive parallel resource advantage overcomes the clock deficit.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical. The power profiles differ substantially: the RTX 6000 Ada Generation has a 300 W TDP and requires a 16-pin power connector with a 700 W suggested PSU, whereas the RX 6650M XT has a 120 W TDP, uses no external power connectors, and is an integrated graphics processor (IGP) for mobile platforms. The NVIDIA card is a dual-slot, 267 mm long, 112 mm tall PCIe 4.0 x16 add-in board with four DisplayPort 1.4a outputs. The AMD card uses PCIe 4.0 x8 and has display outputs described as "Portable Device Dependent."

The Verdict

The data supports an unambiguous conclusion: the NVIDIA RTX 6000 Ada Generation is a workstation-class accelerator designed for maximum compute throughput, while the AMD Radeon RX 6650M XT is a mobile GPU optimized for laptop integration and moderate power consumption. The 305.2% benchmark gap in OpenCL performance reflects this fundamental positioning.

For users requiring 48 GB of memory, 960.0 GB/s bandwidth, and 91.06 TFLOPS of FP32 compute, the RTX 6000 Ada Generation is the clear choice. Its 99th percentile ranking and proximity to the AMD Instinct MI300X (only 9.7% slower) demonstrate that it competes at the very top of the performance hierarchy. The 300 W TDP and dual-slot form factor are acceptable trade-offs for a stationary workstation.

For users needing a mobile GPU that fits into a laptop with no external power connectors and a 120 W TDP, the RX 6650M XT is the only viable option between the two. Its 91st percentile ranking and tight competition with the RTX 5090 D and RX 6850M XT show it is a solid mid-tier mobile part, but it cannot approach the NVIDIA card’s absolute performance. The 8 GB memory capacity and 256.0 GB/s bandwidth will limit workloads that require large datasets or high-bandwidth access.

There is no scenario where the RX 6650M XT outperforms the RTX 6000 Ada Generation in compute-heavy tasks. The only reasons to choose the AMD part are form factor, power envelope, and mobility constraints. The verdict from the recorded data is straightforward: the NVIDIA RTX 6000 Ada Generation is overwhelmingly faster, and the AMD Radeon RX 6650M XT serves a completely different use case.

Specification Differences

| Specification | NVIDIA RTX 6000 Ada Generation | AMD Radeon RX 6650M XT |

| --- | --- | --- |

| Architecture | Ada Lovelace | RDNA 2.0 |

| Process Node | 5 nm | 7 nm |

| Transistors | 76,300 million | 11,060 million |

| Die Size | 609 mm² | 237 mm² |

| Transistor Density | 125.3M / mm² | 46.7M / mm² |

| Base Clock | 915 MHz | 2068 MHz |

| Boost Clock | 2505 MHz | 2416 MHz |

| Game Clock | None | 2162 MHz |

| Memory Clock | 2500 MHz (20 Gbps effective) | 2000 MHz (16 Gbps effective) |

| Memory Size | 48 GB | 8 GB |

| Memory Bus Width | 384 bit | 128 bit |

| Memory Bandwidth | 960.0 GB/s | 256.0 GB/s |

| Shading Units | 18,176 | 2,048 |

| TMUs | 568 | 128 |

| ROPs | 192 | 64 |

| Ray Tracing Cores | 142 | 32 |

| Tensor Cores | 568 | None |

| Pixel Rate | 481.0 GPixel/s | 154.6 GPixel/s |

| Texture Rate | 1,422.8 GTexel/s | 309.2 GTexel/s |

| FP32 Performance | 91.06 TFLOPS | 9.896 TFLOPS |

| FP16 Performance | 91.06 TFLOPS (1:1) | 19.79 TFLOPS (2:1) |

| TDP | 300 W | 120 W |

| Slot Width | Dual-slot | IGP |

| Power Connectors | 1x 16-pin | None |

| Suggested PSU | 700 W | None |

| Bus Interface | PCIe 4.0 x16 | PCIe 4.0 x8 |

| Display Outputs | 4x DisplayPort 1.4a | Portable Device Dependent |

| Dimensions | 267 mm x 112 mm | None |

| Release Date | 2022-12-02 | 2022-01-03 |

| Predecessor | Workstation Ampere | Polaris Mobile |

| Successor | Blackwell PRO W | None |

| Launch MSRP | 6,799 USD | None |