AMD Radeon RX 7650 GRE vs NVIDIA GeForce RTX 4090 Mobile Comparison

The NVIDIA GeForce RTX 4090 Mobile and AMD Radeon RX 7650 GRE represent two distinct approaches to high-performance graphics, separated by process generation, memory configuration, and intended use case. The benchmark data shows a decisive overall victory for the NVIDIA part, with the RTX 4090 Mobile leading in the only shared test by a wide margin. However, the AMD card offers a different set of physical and architectural characteristics that may appeal to specific users. This analysis examines the head-to-head results, architectural divergences, and the practical implications of each GPU's design.

Head-to-Head Benchmarks

The only directly comparable benchmark in the data is Geekbench OpenCL, and the results are not close. The NVIDIA GeForce RTX 4090 Mobile scores 180,831 points, while the AMD Radeon RX 7650 GRE scores 83,109 points. This represents a 117.6% advantage for the NVIDIA GPU, meaning it more than doubles the AMD card's OpenCL performance in this test. This is a massive delta that suggests the RTX 4090 Mobile's compute resources are in a completely different class.

The NVIDIA part's average benchmark score across all recorded tests is 43,667, which places it in the 84th percentile of all GPUs. The AMD RX 7650 GRE averages 42,723, putting it in the 83rd percentile. Despite the enormous OpenCL gap, the overall average scores are separated by only 2.2%, indicating that the AMD card performs competitively in other undisclosed workloads. The RTX 4090 Mobile's closest rivals are the NVIDIA RTX A6000 (average 44,075, 0.9% higher), the NVIDIA Quadro M6000 (average 43,301, 0.8% lower), and the NVIDIA GeForce RTX 5050 Mobile (average 43,268, 0.9% lower). For the AMD card, its nearest rivals include the NVIDIA GeForce RTX 4070 SUPER (average 43,223, 1.2% higher) and the same Quadro M6000 variants, all within a 1.3% delta.

In the head-to-head OpenCL test, the RTX 4090 Mobile's 117.6% lead is the single biggest win recorded. The RX 7650 GRE has no wins in the shared benchmark suite. This asymmetry is stark, but it must be noted that the AMD card's benchmark portfolio is limited to just two tests: Geekbench OpenCL and 3DMark Steel Nomad DX12, where it scores 2,336. The NVIDIA card has a broader range of scores across Passmark DirectX 9, 10, 11, 12, G2D, G3D, and compute tests, suggesting a more comprehensive validation history.

Looking at the NVIDIA GPU's other scores, it achieves 27,212 in Passmark G3D, 12,347 in GPU compute, and 984 in G2D. The DirectX 9 score of 310 versus DirectX 12 score of 107 shows a typical regression for newer API workloads, which is a common pattern. The AMD card's 3DMark Steel Nomad score of 2,336 is its only modern gaming metric, and without a direct NVIDIA equivalent in the shared data, direct gaming comparison remains limited to the OpenCL result.

Architecture Differences

The fundamental architectural split is between NVIDIA's Ada Lovelace and AMD's RDNA 3.0. The RTX 4090 Mobile uses the AD103 chip on a 5 nm TSMC process, while the RX 7650 GRE uses the Navi 33 chip on a 6 nm TSMC process. This process advantage gives NVIDIA a significant transistor density lead: 121.1 million transistors per mm² versus AMD's 65.2 million per mm². The NVIDIA chip packs 45,900 million transistors into a 379 mm² die, whereas the AMD chip contains 13,300 million transistors on a 204 mm² die.

The compute configurations diverge sharply. The RTX 4090 Mobile features 9,728 shading units, 304 texture mapping units, 112 ROPs, 76 ray tracing cores, and 304 tensor cores. The RX 7650 GRE has 2,048 shading units, 128 TMUs, 64 ROPs, and 32 ray tracing cores, with no tensor cores listed. This 4.75x difference in shading units and 2.375x difference in TMUs explains the OpenCL performance gap, though the AMD card's higher clocks partially compensate.

Clock speeds tell a different story. The AMD card boosts to 2,695 MHz with a game clock of 2,350 MHz and a base of 1,720 MHz. The NVIDIA GPU runs at a lower 1,695 MHz boost and 1,335 MHz base. Despite lower clocks, the NVIDIA part's raw throughput numbers are much higher: 32.98 TFLOPS FP32 versus 22.08 TFLOPS for AMD. Both offer 1:1 FP16/FP32 ratios. Pixel rates are closer (189.8 GPixel/s for NVIDIA versus 172.5 GPixel/s for AMD), but texture rate favors NVIDIA at 515.3 GTexel/s versus 345.0 GTexel/s.

Memory is another major divergence. The RTX 4090 Mobile has 16 GB of GDDR6 on a 256-bit bus, delivering 576.0 GB/s of bandwidth. The RX 7650 GRE has 8 GB of GDDR6 on a 128-bit bus, halving bandwidth to 288.0 GB/s. Both run memory at 2250 MHz with 18 Gbps effective speed, but the wider bus is decisive. The NVIDIA card is an integrated GPU (IGP) with no power connectors and a 120 W TDP, while the AMD card is a dual-slot discrete card with a single 8-pin connector and 170 W TDP, requiring a 450 W PSU.

FAQ

Q: Which GPU has higher raw compute performance?

A: The NVIDIA GeForce RTX 4090 Mobile delivers 32.98 TFLOPS FP32, which is 49.4% higher than the AMD Radeon RX 7650 GRE's 22.08 TFLOPS. This is reflected in the 117.6% OpenCL score advantage.

Q: How do their memory configurations compare?

A: The RTX 4090 Mobile has 16 GB of GDDR6 on a 256-bit bus, yielding 576.0 GB/s bandwidth. The RX 7650 GRE has 8 GB on a 128-bit bus, yielding 288.0 GB/s. Both use 18 Gbps effective memory speed.

Q: What is the physical form factor difference?

A: The NVIDIA GPU is an IGP with no power connectors and a 120 W TDP, while the AMD GPU is a dual-slot card measuring 204 mm in length with a single 8-pin connector and a 170 W TDP, requiring a 450 W PSU.

Q: Are their API support levels the same?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. However, the NVIDIA card includes 304 tensor cores, which the AMD card lacks entirely.

Q: How do their overall benchmark averages compare?

A: The RTX 4090 Mobile averages 43,667 across all tests (84th percentile), while the RX 7650 GRE averages 42,723 (83rd percentile). The 2.2% difference is small despite the large OpenCL gap.

Q: Which card has better transistor efficiency?

A: The NVIDIA AD103 chip has 121.1M transistors per mm² on a 5 nm process, versus AMD's 65.2M per mm² on 6 nm. NVIDIA's die is 379 mm², while AMD's is 204 mm².

Specification Differences

| Specification | NVIDIA GeForce RTX 4090 Mobile | AMD Radeon RX 7650 GRE |

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

| Architecture | Ada Lovelace | RDNA 3.0 |

| Process Node | 5 nm | 6 nm |

| Transistors | 45,900 million | 13,300 million |

| Die Size | 379 mm² | 204 mm² |

| Transistor Density | 121.1M / mm² | 65.2M / mm² |

| Base Clock | 1335 MHz | 1720 MHz |

| Boost Clock | 1695 MHz | 2695 MHz |

| Game Clock | N/A | 2350 MHz |

| Memory Size | 16 GB | 8 GB |

| Memory Bus | 256 bit | 128 bit |

| Memory Bandwidth | 576.0 GB/s | 288.0 GB/s |

| Shading Units | 9728 | 2048 |

| TMUs | 304 | 128 |

| ROPs | 112 | 64 |

| Ray Tracing Cores | 76 | 32 |

| Tensor Cores | 304 | N/A |

| Pixel Rate | 189.8 GPixel/s | 172.5 GPixel/s |

| Texture Rate | 515.3 GTexel/s | 345.0 GTexel/s |

| FP32 | 32.98 TFLOPS | 22.08 TFLOPS |

| TDP | 120 W | 170 W |

| Slot Width | IGP | Dual-slot |

| Power Connectors | None | 1x 8-pin |

| Suggested PSU | N/A | 450 W |

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

| Display Outputs | Portable Device Dependent | 1x HDMI 2.1a, 3x DisplayPort 2.1 |

| Dimensions | N/A | 204 mm x 115 mm |

| Release Date | 2023-01-02 | 2025-02-06 |

| Launch MSRP | N/A | 279 USD |

Where Each One Wins

The NVIDIA GeForce RTX 4090 Mobile wins decisively in raw compute performance, as evidenced by the 117.6% OpenCL lead. Its 32.98 TFLOPS FP32 throughput, 76 ray tracing cores, and 304 tensor cores make it the clear choice for AI-accelerated workloads, ray-traced rendering, and any application that leverages NVIDIA's tensor core technology. The 16 GB memory capacity on a 256-bit bus provides 576.0 GB/s bandwidth, which is critical for large datasets, high-resolution textures, and compute-heavy tasks. Its higher average benchmark score (43,667) and 84th percentile ranking place it among the top GPUs, with nearest rivals including the RTX A6000 and Quadro M6000. The lower 120 W TDP and IGP form factor mean it can be integrated into portable devices without discrete power connectors, making it suitable for thin-and-light gaming laptops that still demand desktop-class performance.

The AMD Radeon RX 7650 GRE wins in efficiency of physical design for desktop use. As a dual-slot card with a single 8-pin connector, it is easier to install in a standard desktop chassis. Its higher boost clock of 2,695 MHz suggests strong per-clock efficiency, and its 22.08 TFLOPS FP32 is still substantial. The 8 GB memory, while half the capacity, is paired with a 128-bit bus for 288.0 GB/s bandwidth, which is adequate for 1080p gaming. The 3DMark Steel Nomad DX12 score of 2,336 provides a modern gaming metric, and its average benchmark score of 42,723 places it in the 83rd percentile, just 0.9% behind the RTX 5050 Mobile. The AMD card's nearest rivals are the RTX 4070 SUPER and Quadro M6000 24 GB, all within a tight 1.3% band. The RX 7650 GRE's launch date of February 2025 makes it a newer product, and its 279 USD launch MSRP is notably lower, though pricing is not a factor in performance analysis.

The use-case split is clear. For mobile workstations, AI inference, and maximum compute throughput, the RTX 4090 Mobile is the superior choice. Its tensor cores, higher memory bandwidth, and larger frame buffer give it an insurmountable lead in the shared benchmark. For desktop builders seeking a modern discrete card with DisplayPort 2.1 outputs and a compact 204 mm length, the RX 7650 GRE offers a viable alternative, particularly where the IGP form factor of the NVIDIA part is not applicable. The data shows the RTX 4090 Mobile wins the only direct comparison, but the AMD card's different physical profile and newer release date target a separate segment of the market.