AMD Instinct MI308X vs AMD Radeon RX 7600M XT Comparison

FAQ

Q: What is the architectural difference between the AMD Instinct MI308X and the AMD Radeon RX 7600M XT?

A: The Instinct MI308X uses CDNA 3.0 architecture on a 5 nm process with 153,000 million transistors, while the RX 7600M XT uses RDNA 3.0 architecture on a 6 nm process with 13,300 million transistors.

Q: How much memory does each GPU have and what type?

A: The Instinct MI308X has 192 GB of HBM3 memory on an 8192-bit bus with 5.32 TB/s bandwidth. The RX 7600M XT has 8 GB of GDDR6 memory on a 128-bit bus with 288.0 GB/s bandwidth.

Q: What is the FP32 compute performance of each card?

A: The Instinct MI308X delivers 81.72 TFLOPS FP32, while the RX 7600M XT delivers 20.23 TFLOPS FP32. The Instinct MI308X is roughly 4 times higher in this metric.

Q: Does the RX 7600M XT have ray tracing support?

A: Yes, the RX 7600M XT includes 32 ray tracing cores. The Instinct MI308X has no listed RT cores.

Q: What is the power consumption difference?

A: The Instinct MI308X has a 750 W TDP and requires a 1150 W suggested PSU. The RX 7600M XT has a 120 W TDP.

Q: Which card has a higher benchmark percentile ranking?

A: The RX 7600M XT ranks at the 52nd percentile among all GPUs, while the Instinct MI308X ranks at the 50th percentile, despite having no recorded benchmarks.

Architecture Differences

The AMD Instinct MI308X and AMD Radeon RX 7600M XT represent two fundamentally different design philosophies within AMD's product stack. The MI308X is based on the CDNA 3.0 architecture using the Aqua Vanjaram chip, fabricated on a 5 nm process at TSMC. It packs 153,000 million transistors into a 1017 mm² die, yielding a transistor density of 150.4 million per square millimeter. This is a compute-optimized accelerator with no display outputs, no DirectX, OpenGL, or Vulkan API support, and zero raster operation units (ROPs), indicating it is purely designed for data center workloads rather than graphics rendering.

The RX 7600M XT uses the RDNA 3.0 architecture with the Navi 33 chip, codenamed Hotpink Bonefish, on a 6 nm process. Its die size is 204 mm² with 13,300 million transistors, giving a transistor density of 65.2 million per square millimeter. This is a mobile graphics processor with 32 ray tracing cores, 64 ROPs, and full API support including DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. It also has display outputs described as "Portable Device Dependent," reflecting its mobile IGP form factor.

The shading unit counts differ dramatically: the MI308X has 19,456 shading units and 1,216 texture mapping units (TMUs), while the RX 7600M XT has 2,048 shading units and 128 TMUs. The MI308X has no RT cores listed, while the RX 7600M XT has 32. The MI308X's memory subsystem is built around 192 GB of HBM3 on an 8192-bit bus, whereas the RX 7600M XT uses 8 GB of GDDR6 on a 128-bit bus. The bus interface also differs: PCIe 5.0 x16 for the MI308X versus PCIe 4.0 x16 for the RX 7600M XT.

Clock behavior further separates the two. The MI308X runs at a 1000 MHz base and 2100 MHz boost, with memory at 1300 MHz (5.2 Gbps effective). The RX 7600M XT has a 1280 MHz base, 2469 MHz boost, and a 2023 MHz game clock, with memory at 2250 MHz (18 Gbps effective). The MI308X's higher memory bandwidth (5.32 TB/s versus 288.0 GB/s) is a direct result of the wider bus and HBM3 technology.

Head-to-Head Benchmarks

Direct head-to-head benchmark data between the MI308X and RX 7600M XT is not available in the database. The MI308X has no recorded benchmark scores, while the RX 7600M XT has ten recorded tests. This absence of comparative measurements means the analysis relies on architectural specifications and the RX 7600M XT's standalone results.

The RX 7600M XT's best standalone result is in Geekbench OpenCL with a score of 74,869. Its Geekbench Vulkan score reaches 27,793. In 3DMark Steel Nomad DX12, it scores 2,048. Passmark results include 13,907 in G3D, 7,140 in GPU Compute, 894 in G2D, 175 in DirectX 9, 137 in DirectX 11, 76 in DirectX 10, and 58 in DirectX 12.

The RX 7600M XT's average benchmark score is 12,710, placing it at the 52nd percentile among all GPUs. Its nearest rivals in the database are the NVIDIA GeForce GTX 670 with an average score of 12,773 (-0.5% delta), the NVIDIA Tesla K20Xm at 12,625 (+0.7% delta), the NVIDIA GeForce GTX 590 at 12,830 (-0.9% delta), and the AMD Radeon Pro 455 at 12,831 (-0.9% delta). This shows the RX 7600M XT sits within a very tight performance cluster, less than one percent away from each rival.

For the MI308X, the FP32 compute of 81.72 TFLOPS is 4.04 times the RX 7600M XT's 20.23 TFLOPS. The texture rate of 2,553.6 GTexel/s versus 316.0 GTexel/s gives the MI308X an 8.1 times advantage. Memory bandwidth at 5.32 TB/s versus 288.0 GB/s is an 18.5 times difference. These ratios indicate the MI308X is designed for massively parallel compute tasks, while the RX 7600M XT targets conventional graphics with its 158.0 GPixel/s pixel rate, a metric the MI308X cannot match at 0 MPixel/s.

The Verdict

The data indicates two distinct products for separate markets. The AMD Instinct MI308X is a data center accelerator with enormous memory capacity (192 GB), extreme bandwidth (5.32 TB/s), and no graphics output. Its FP32 throughput of 81.72 TFLOPS and FP16 throughput of 81.72 TFLOPS (1:1 ratio) show a design optimized for compute density. The 750 W TDP and OAM Module slot width confirm its server-oriented nature.

The AMD Radeon RX 7600M XT is a mobile graphics processor with 8 GB GDDR6, 32 RT cores, full graphics API support, and a 120 W TDP. Its 52nd percentile ranking and average benchmark score of 12,710 place it in the mid-range mobile segment, comparable to older desktop cards like the GTX 670 and GTX 590. Its production status is listed as Active, while the MI308X has no production status recorded.

Users requiring display output, ray tracing, or DirectX/Vulkan support must choose the RX 7600M XT. Users needing massive memory capacity, extreme bandwidth, or peak FP32 compute must choose the MI308X. The two cards share almost no overlapping use cases. The MI308X has no recorded benchmarks, so its real-world performance cannot be compared directly, but its specifications point to a compute accelerator with no graphics capability whatsoever.

Specification Differences

The two GPUs differ in nearly every recorded specification. The MI308X uses a 5 nm process with 153,000 million transistors on a 1017 mm² die, while the RX 7600M XT uses a 6 nm process with 13,300 million transistors on a 204 mm² die. Transistor density is 150.4M per mm² for the MI308X versus 65.2M per mm² for the RX 7600M XT.

Clock speeds: the MI308X has a 1000 MHz base and 2100 MHz boost, with no game clock. The RX 7600M XT has a 1280 MHz base, 2469 MHz boost, and 2023 MHz game clock. Memory clocks are 1300 MHz (5.2 Gbps effective) for the MI308X and 2250 MHz (18 Gbps effective) for the RX 7600M XT.

Memory: 192 GB HBM3 on an 8192-bit bus with 5.32 TB/s bandwidth versus 8 GB GDDR6 on a 128-bit bus with 288.0 GB/s bandwidth. Shading units: 19,456 versus 2,048. TMUs: 1,216 versus 128. ROPs: 0 versus 64. RT cores: none listed versus 32. Pixel rate: 0 MPixel/s versus 158.0 GPixel/s. Texture rate: 2,553.6 GTexel/s versus 316.0 GTexel/s. FP32: 81.72 TFLOPS versus 20.23 TFLOPS. FP16: 81.72 TFLOPS (1:1) versus 40.45 TFLOPS (2:1). TDP: 750 W versus 120 W. Slot width: OAM Module versus IGP. Suggested PSU: 1150 W versus none listed. Bus interface: PCIe 5.0 x16 versus PCIe 4.0 x16. Display outputs: none versus Portable Device Dependent. API support: none versus DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4.

Release dates differ as well: the MI308X launched on 2023-12-05, while the RX 7600M XT launched on 2023-01-03. The MI308X's predecessor is Radeon Instinct, and the RX 7600M XT's predecessor is Polaris Mobile.

Where Each One Wins

The AMD Instinct MI308X wins decisively in compute-heavy scenarios. Its 81.72 TFLOPS FP32 and FP16 (1:1) throughput makes it suitable for scientific simulation, AI training, and large-scale data processing. The 192 GB HBM3 memory with 5.32 TB/s bandwidth supports massive datasets that would not fit in the RX 7600M XT's 8 GB GDDR6. The 8192-bit bus width is 64 times wider than the RX 7600M XT's 128-bit bus. The texture rate of 2,553.6 GTexel/s is 8.1 times higher, benefiting workloads that rely on texture sampling.

The AMD Radeon RX 7600M XT wins in graphics rendering and mobile deployment. Its 158.0 GPixel/s pixel rate, 64 ROPs, and 32 RT cores enable conventional rasterization and ray-traced visuals. Full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support means it can run modern games and graphics applications, which the MI308X cannot. The 2,469 MHz boost clock is higher than the MI308X's 2,100 MHz, and the 120 W TDP allows integration into portable devices, while the MI308X requires a 750 W power budget and an OAM module slot.

The RX 7600M XT also wins on benchmark availability. Its recorded scores, including 74,869 in Geekbench OpenCL and 13,907 in Passmark G3D, provide measurable performance data. The MI308X has no benchmarks in the database, leaving its real-world behavior unverified. The RX 7600M XT's 52nd percentile ranking exceeds the MI308X's 50th percentile, although this ranking for the MI308X is based on no recorded scores.

In summary, the MI308X is the choice for raw compute density, memory capacity, and bandwidth. The RX 7600M XT is the choice for graphics rendering, ray tracing, API compatibility, and mobile integration. There is no overlap in their optimal use cases.