AMD Instinct MI455X vs AMD Radeon RX 7650 GRE Comparison

AMD Instinct MI455X and AMD Radeon RX 7650 GRE occupy opposite ends of the AMD accelerator spectrum. The MI455X is a 2300 W compute module built for massive parallel workloads, while the RX 7650 GRE is a 170 W consumer graphics card. The recorded data shows a 50th percentile standing for the MI455X against all GPUs, while the RX 7650 GRE sits at the 83rd percentile. The following analysis relies strictly on the database measurements and specification records.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries for these two accelerators. The MI455X has no benchmark scores recorded, with an average benchmark score of 0, meaning its percentile ranking of 50 reflects its specification profile rather than measured workload performance. The RX 7650 GRE, by contrast, has two recorded benchmark results: 2336 in 3DMark Steel Nomad DX12 and 83109 in Geekbench OpenCL, producing an average benchmark score of 42723.

The absence of measured data for the MI455X makes a direct performance comparison impossible. The RX 7650 GRE's nearest rivals in the database are all within a narrow band. The NVIDIA GeForce RTX 4070 SUPER averages 43223, which is 1.2% higher than the RX 7650 GRE. The NVIDIA Quadro M6000 24 GB averages 43262, also 1.2% higher. The NVIDIA GeForce RTX 5050 Mobile averages 43268, 1.3% higher. The NVIDIA Quadro M6000 averages 43301, 1.3% higher. This cluster indicates the RX 7650 GRE performs within 1.3% of four distinct NVIDIA products, placing it in a competitive mid-range bracket.

The MI455X offers no comparable measured scores, so no delta percentages can be established. The only quantitative performance indicators are theoretical throughput figures. The MI455X reaches 157.3 TFLOPS FP32 and 157.3 TFLOPS FP16, while the RX 7650 GRE reaches 22.08 TFLOPS FP32 and 22.08 TFLOPS FP16. The MI455X delivers 7.12 times the FP32 throughput of the RX 7650 GRE. Pixel rate tells the opposite story: the MI455X has 0 MPixel/s because it has 0 ROPs, while the RX 7650 GRE produces 172.5 GPixel/s. Texture rate favors the MI455X at 2457.6 GTexel/s versus 345.0 GTexel/s for the RX 7650 GRE, a 7.12 times advantage again.

Memory bandwidth is another decisive split. The MI455X has 23.3 TB/s of bandwidth from 432 GB of HBM4 on a 24576-bit bus, while the RX 7650 GRE has 288.0 GB/s from 8 GB of GDDR6 on a 128-bit bus. The MI455X offers 80.9 times the memory bandwidth. These figures confirm that the MI455X is built for data movement at scale, whereas the RX 7650 GRE targets conventional rendering workloads.

The Verdict

The data supports a clear division of purpose. The RX 7650 GRE is the only one of the two with any recorded benchmark scores, and its 83rd percentile ranking with an average score of 42723 places it within 1.3% of the RTX 4070 SUPER, the Quadro M6000 24 GB, the RTX 5050 Mobile, and the Quadro M6000. Buyers looking for a consumer graphics card with a 279 USD launch MSRP, 8 GB of GDDR6 memory, and a 170 W TDP should consider the RX 7650 GRE, as it has measurable results and an active production status.

The MI455X has no measured benchmarks and a 50th percentile standing. Its 2300 W TDP, 2700 W suggested PSU, EAM Module slot width, and lack of display outputs indicate it is not a consumer product. Its 432 GB of HBM4 memory and 23.3 TB/s bandwidth, combined with 32768 shading units and 1024 TMUs, position it for server or data center compute tasks. The RX 7650 GRE has 2048 shading units, 128 TMUs, 64 ROPs, and 32 ray tracing cores, which makes it a complete rendering solution.

The verdict from the database is straightforward. The RX 7650 GRE is the only option with recorded performance data and is suitable for graphics workloads. The MI455X is a compute accelerator with no measured graphics capability, no display outputs, and no DirectX, OpenGL, or Vulkan API support. Users requiring rendering, ray tracing, or display output must choose the RX 7650 GRE. Users requiring massive memory capacity and extreme compute throughput, and who can supply 2300 W of power, would look to the MI455X, though no benchmark scores exist to quantify its real-world advantage.

Architecture Differences

The MI455X uses CDNA 5.0 architecture, while the RX 7650 GRE uses RDNA 3.0. CDNA is AMD's compute-focused architecture line, and RDNA is the graphics-focused line. The MI455X chip is designated MI450 256CU, and the RX 7650 GRE chip is Navi 33 with the codename Hotpink Bonefish. The MI455X belongs to the Instinct (MIx) generation, and the RX 7650 GRE belongs to the Navi III (RX 7000) generation.

The MI455X is fabricated on a 2 nm TSMC process, while the RX 7650 GRE uses a 6 nm TSMC process. The MI455X packs 320,000 million transistors on a 2990 mm² die, which gives a transistor density of 107.0 million per mm². The RX 7650 GRE has 13,300 million transistors on a 204 mm² die, a density of 65.2 million per mm². The MI455X die is 14.7 times larger and holds 24.1 times more transistors.

The MI455X has no ROPs, no ray tracing cores, and no tensor cores recorded. It also has no DirectX, OpenGL, or Vulkan API support. The RX 7650 GRE has 64 ROPs and 32 ray tracing cores, and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI455X uses HBM4 memory, and the RX 7650 GRE uses GDDR6. The MI455X connects via PCIe 6.0 x16, and the RX 7650 GRE uses PCIe 4.0 x8. The MI455X has no display outputs, and the RX 7650 GRE has 1x HDMI 2.1a and 3x DisplayPort 2.1.

The MI455X runs at a 1000 MHz base clock and a 2400 MHz boost clock, with memory at 1900 MHz (7.6 Gbps effective). The RX 7650 GRE runs at a 1720 MHz base clock, a 2350 MHz game clock, and a 2695 MHz boost clock, with memory at 2250 MHz (18 Gbps effective). The RX 7650 GRE has higher clocks in every category, which reflects its rendering focus. The MI455X compensates with 32768 shading units versus 2048, and 1024 TMUs versus 128.

Specification Differences

Memory size differs substantially: 432 GB on the MI455X versus 8 GB on the RX 7650 GRE. Memory type differs: HBM4 versus GDDR6. Bus width differs: 24576 bit versus 128 bit. Bandwidth differs: 23.3 TB/s versus 288.0 GB/s. Shading units differ: 32768 versus 2048. TMUs differ: 1024 versus 128. ROPs differ: 0 versus 64. Ray tracing cores differ: none recorded versus 32. Pixel rate differs: 0 MPixel/s versus 172.5 GPixel/s. Texture rate differs: 2457.6 GTexel/s versus 345.0 GTexel/s. FP32 and FP16 throughput both differ: 157.3 TFLOPS versus 22.08 TFLOPS.

TDP differs: 2300 W versus 170 W. Slot width differs: EAM Module versus Dual-slot. Power connectors differ: none versus 1x 8-pin. Suggested PSU differs: 2700 W versus 450 W. Bus interface differs: PCIe 6.0 x16 versus PCIe 4.0 x8. Display outputs differ: no outputs versus 1x HDMI 2.1a and 3x DisplayPort 2.1. Process node differs: 2 nm versus 6 nm. Transistors differ: 320,000 million versus 13,300 million. Die size differs: 2990 mm² versus 204 mm². Transistor density differs: 107.0 million per mm² versus 65.2 million per mm².

Clocks differ across the board. Base clock: 1000 MHz versus 1720 MHz. Boost clock: 2400 MHz versus 2695 MHz. The RX 7650 GRE records a game clock of 2350 MHz, and the MI455X has no game clock. Memory clock: 1900 MHz (7.6 Gbps effective) versus 2250 MHz (18 Gbps effective). Dimensions differ: the RX 7650 GRE measures 204 mm by 115 mm, and the MI455X has no recorded dimensions. Release dates differ: the MI455X launched on 2026-07-22, and the RX 7650 GRE launched on 2025-02-06. The RX 7650 GRE has a production status of Active, and the MI455X has none recorded. The RX 7650 GRE has a launch MSRP of 279 USD, and the MI455X has no launch MSRP recorded.

FAQ

Q: Which GPU has higher measured benchmark performance?

A: Only the RX 7650 GRE has recorded benchmark scores. It scores 2336 in 3DMark Steel Nomad DX12 and 83109 in Geekbench OpenCL, with an average benchmark score of 42723. The MI455X has no recorded benchmark scores.

Q: How does the RX 7650 GRE compare to its nearest rivals?

A: The RX 7650 GRE averages 42723, which is 1.2% below the NVIDIA GeForce RTX 4070 SUPER at 43223, 1.2% below the NVIDIA Quadro M6000 24 GB at 43262, 1.3% below the NVIDIA GeForce RTX 5050 Mobile at 43268, and 1.3% below the NVIDIA Quadro M6000 at 43301.

Q: Can the Instinct MI455X output video to a display?

A: No. The MI455X has no display outputs, while the RX 7650 GRE has 1x HDMI 2.1a and 3x DisplayPort 2.1.

Q: What is the memory configuration difference?

A: The MI455X has 432 GB of HBM4 on a 24576-bit bus with 23.3 TB/s bandwidth. The RX 7650 GRE has 8 GB of GDDR6 on a 128-bit bus with 288.0 GB/s bandwidth.

Q: Which card supports ray tracing?

A: The RX 7650 GRE has 32 ray tracing cores. The MI455X has no ray tracing cores recorded.

Q: What are the power requirements for each?

A: The MI455X has a 2300 W TDP and a 2700 W suggested PSU. The RX 7650 GRE has a 170 W TDP and a 450 W suggested PSU, using a single 8-pin power connector.