AMD Instinct MI308X vs AMD Radeon RX 7650 GRE Comparison

FAQ

Q: What is the core architecture difference between the AMD Instinct MI308X and the AMD Radeon RX 7650 GRE?

A: The Instinct MI308X uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, while the RX 7650 GRE uses the RDNA 3.0 architecture with the Navi 33 chip. The MI308X is built on a 5 nm process, whereas the RX 7650 GRE uses a 6 nm process, both from TSMC.

Q: How do the memory subsystems compare between these two cards?

A: The MI308X has 192 GB of HBM3 memory on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The RX 7650 GRE has 8 GB of GDDR6 memory on a 128-bit bus, delivering 288.0 GB/s. This is a difference of 184 GB in capacity and roughly 5 TB/s in bandwidth.

Q: Which card has higher raw compute throughput in FP32?

A: The MI308X delivers 81.72 TFLOPS FP32, while the RX 7650 GRE delivers 22.08 TFLOPS FP32. The MI308X is 3.7 times faster in this metric. Both cards achieve the same FP16 throughput at a 1:1 ratio.

Q: What are the display output capabilities of each card?

A: The Instinct MI308X has no display outputs, as it is an OAM module for compute workloads. The RX 7650 GRE has 1x HDMI 2.1a and 3x DisplayPort 2.1 outputs, making it suitable for desktop use.

Q: How do the power requirements differ?

A: The MI308X has a TDP of 750 W with no power connectors (OAM module) and requires a 1150 W suggested PSU. The RX 7650 GRE has a TDP of 170 W, uses a single 8-pin connector, and requires a 450 W suggested PSU.

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

A: The MI308X was released on December 5, 2023, with no production status listed. The RX 7650 GRE was released on February 6, 2025, and is marked as Active in production.

Where Each One Wins

The AMD Instinct MI308X dominates in absolute compute throughput. Its FP32 performance of 81.72 TFLOPS is nearly four times the 22.08 TFLOPS of the RX 7650 GRE. The texture rate also heavily favors the MI308X: 2,553.6 GTexel/s versus 345.0 GTexel/s, a 7.4 times advantage. Memory bandwidth is another decisive win, with 5.32 TB/s against 288.0 GB/s, an 18.5 times difference. The MI308X also carries 192 GB of memory versus 8 GB, which is critical for large-scale datasets.

The AMD Radeon RX 7650 GRE wins in areas relevant to desktop use. It has a pixel rate of 172.5 GPixel/s, while the MI308X has 0 MPixel/s, meaning the latter cannot rasterize frames at all. The RX 7650 GRE provides display outputs (1x HDMI 2.1a, 3x DisplayPort 2.1), runs on a standard PCIe 4.0 x8 interface, and fits in a dual-slot form factor. Its 170 W TDP is manageable for consumer systems, compared to the 750 W requirement of the MI308X. The RX 7650 GRE also supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI308X lists no graphics API support.

Benchmark data for the RX 7650 GRE shows a 3DMark Steel Nomad DX12 score of 2,336 and a Geekbench OpenCL score of 83,109. Its average benchmark score is 42,723, placing it at the 83rd percentile among all GPUs. The MI308X has no recorded benchmarks and sits at the 50th percentile with an average score of zero, indicating the database has no compute measurements for it.

Architecture Differences

The MI308X is built on the CDNA 3.0 architecture, optimized for compute and AI workloads. It uses the Aqua Vanjaram chip on a 5 nm TSMC process with 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4M per mm². The architecture has 19,456 shading units and 1,216 TMUs, but zero ROPs. There are no RT cores or tensor cores listed, and the pixel rate is 0 MPixel/s, confirming it is not designed for graphics output.

The RX 7650 GRE uses the RDNA 3.0 architecture, built for gaming and consumer graphics. The Navi 33 chip is fabricated on a 6 nm TSMC process with 13,300 million transistors on a 204 mm² die, giving a density of 65.2M per mm². It has 2,048 shading units, 128 TMUs, 64 ROPs, and 32 RT cores. The pixel rate is 172.5 GPixel/s, and the texture rate is 345.0 GTexel/s.

The MI308X has no display outputs, no graphics API support, and uses an OAM Module slot width with no power connectors. The RX 7650 GRE is a dual-slot card with a single 8-pin connector, supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and includes standard display outputs. The MI308X runs on PCIe 5.0 x16, while the RX 7650 GRE uses PCIe 4.0 x8.

The transistor count difference is substantial: 153,000 million versus 13,300 million. The die size difference is 1017 mm² versus 204 mm². These figures reflect fundamentally different design goals, with the MI308X prioritizing massive parallel compute and memory capacity, and the RX 7650 GRE prioritizing efficiency and rasterization.

Specification Differences

| Specification | AMD Instinct MI308X | AMD Radeon RX 7650 GRE |

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

| Architecture | CDNA 3.0 | RDNA 3.0 |

| Chip | Aqua Vanjaram | Navi 33 |

| Process Node | 5 nm | 6 nm |

| Transistors | 153,000 million | 13,300 million |

| Die Size | 1017 mm² | 204 mm² |

| Base Clock | 1000 MHz | 1720 MHz |

| Boost Clock | 2100 MHz | 2695 MHz |

| Memory Size | 192 GB | 8 GB |

| Memory Type | HBM3 | GDDR6 |

| Memory Bus Width | 8192 bit | 128 bit |

| Memory Bandwidth | 5.32 TB/s | 288.0 GB/s |

| Shading Units | 19,456 | 2,048 |

| TMUs | 1,216 | 128 |

| ROPs | 0 | 64 |

| Pixel Rate | 0 MPixel/s | 172.5 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 345.0 GTexel/s |

| FP32 | 81.72 TFLOPS | 22.08 TFLOPS |

| FP16 | 81.72 TFLOPS (1:1) | 22.08 TFLOPS (1:1) |

| TDP | 750 W | 170 W |

| Slot Width | OAM Module | Dual-slot |

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

| Suggested PSU | 1150 W | 450 W |

| Bus Interface | PCIe 5.0 x16 | PCIe 4.0 x8 |

| Display Outputs | No outputs | 1x HDMI 2.1a, 3x DisplayPort 2.1 |

| DirectX Support | N/A | 12 Ultimate (12_2) |

| OpenGL Support | N/A | 4.6 |

| Vulkan Support | N/A | 1.4 |

| Release Date | 2023-12-05 | 2025-02-06 |

The RX 7650 GRE has a higher base clock (1720 MHz versus 1000 MHz) and boost clock (2695 MHz versus 2100 MHz). It also has a game clock of 2350 MHz, which the MI308X does not list. The memory clock for the MI308X is 1300 MHz (5.2 Gbps effective), while the RX 7650 GRE runs at 2250 MHz (18 Gbps effective).

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark results between the MI308X and RX 7650 GRE. Instead, each card has its own measurements. The RX 7650 GRE has two recorded benchmarks: a 3DMark Steel Nomad DX12 score of 2,336 and a Geekbench OpenCL score of 83,109. Its average benchmark score is 42,723.

The MI308X has no benchmarks in the database. Its average benchmark score is 0, and it holds the 50th percentile among all GPUs. The RX 7650 GRE holds the 83rd percentile, indicating it outperforms a large majority of recorded GPUs in the database.

For context, the RX 7650 GRE's nearest rivals are all NVIDIA products. The GeForce RTX 4070 SUPER has an average score of 43,223, which is 1.2% higher than the RX 7650 GRE. The Quadro M6000 24 GB scores 43,262, also 1.2% higher. The GeForce RTX 5050 Mobile scores 43,268, 1.3% higher. The Quadro M6000 scores 43,301, 1.3% higher. These deltas show the RX 7650 GRE is competitive with these cards, trailing by roughly one percent.

The FP32 comparison is the most striking numerical difference. The MI308X at 81.72 TFLOPS is 3.7 times the RX 7650 GRE's 22.08 TFLOPS. The texture rate difference is even larger: 2,553.6 GTexel/s versus 345.0 GTexel/s. Memory bandwidth shows the largest gap, with the MI308X at 5.32 TB/s versus 288.0 GB/s.

The RX 7650 GRE wins on pixel rate, as the MI308X has none. The RX 7650 GRE also wins on clock speeds, with a boost clock of 2695 MHz versus 2100 MHz. The base clock difference is 1720 MHz versus 1000 MHz.

The Verdict

The data indicates these are entirely different classes of hardware. The AMD Instinct MI308X is a compute accelerator with 192 GB of HBM3 memory, 81.72 TFLOPS FP32, and 5.32 TB/s bandwidth. It has no display outputs, no graphics API support, and zero pixel rate. This card is designed for tasks that require massive memory capacity and raw throughput, such as large-scale compute workloads.

The AMD Radeon RX 7650 GRE is a consumer graphics card with 8 GB GDDR6, 22.08 TFLOPS FP32, and 288.0 GB/s bandwidth. It has 64 ROPs, 32 RT cores, and full graphics API support. It also has display outputs and a 170 W TDP, making it suitable for standard desktop systems.

For compute workloads, the MI308X is the clear choice based on its 3.7 times FP32 advantage, 7.4 times texture rate advantage, and 18.5 times memory bandwidth advantage. The 192 GB memory capacity versus 8 GB means it can handle datasets that would be impossible for the RX 7650 GRE.

For gaming or general desktop graphics, the RX 7650 GRE is the only viable option, as the MI308X cannot output video. The RX 7650 GRE's 83rd percentile ranking and its proximity to the RTX 4070 SUPER (1.2% lower average score) show it is a solid performer in its category.

The MI308X has no benchmark data, so its percentile ranking of 50 is based on zero recorded scores. This does not reflect its actual capability, only the absence of measurements. The RX 7650 GRE has concrete benchmark results, with an average score of 42,723.

The user should select based on workload. The MI308X for compute density and memory scale, the RX 7650 GRE for rasterization, display output, and standard desktop use. The two do not compete in the same market segment.