AMD Instinct MI308X vs AMD Radeon RX 7600S Comparison

Head-to-Head Benchmarks

The AMD Instinct MI308X and the AMD Radeon RX 7600S occupy completely different segments of the GPU market, and the recorded data reflects this divide clearly. The MI308X has no benchmark entries in the database, while the RX 7600S has a substantial set of recorded scores. This makes a direct numerical comparison impossible for most tests, but the available data for the RX 7600S and the architectural specifications for both cards provide the basis for analysis.

The RX 7600S delivers a 3DMark Steel Nomad DX12 score of 1888. Its Geekbench OpenCL score reaches 68012, while the Vulkan score climbs to 73868. In Passmark tests, the RX 7600S posts 15408 in G3D, 6520 in GPU Compute, 211 in DirectX 9, 140 in DirectX 11, 74 in DirectX 10, and 65 in DirectX 12. The G2D score is 776.

The MI308X shows no benchmark scores in the database, and its average benchmark score is recorded as zero. Its percentile ranking against all GPUs is 50, while the RX 7600S sits at the 60th percentile. The RX 7600S has an average benchmark score of 16696, placing it in a competitive position against its nearest rivals. The NVIDIA T400 4 GB scores 16792, which is 0.6 percent higher than the RX 7600S. The NVIDIA Tesla M4 scores 16932, 1.4 percent higher. The RX 7600S beats the NVIDIA T400 by 1.1 percent, with the T400 scoring 16508, and it also edges out the NVIDIA GeForce RTX 5090 D V2 by 1.2 percent, which scores 16504.

The MI308X delivers 81.72 TFLOPS of FP32 performance and the same 81.72 TFLOPS in FP16 with a 1:1 ratio. The RX 7600S delivers 15.77 TFLOPS of FP32 and 31.54 TFLOPS of FP16 with a 2:1 ratio. The FP32 figure for the MI308X is roughly five times higher than the RX 7600S, indicating a massive raw compute advantage for the accelerator card. The FP16 figure for the MI308X is about 2.6 times the RX 7600S value.

Texture rate differences are equally stark. The MI308X processes 2,553.6 GTexel/s, while the RX 7600S manages 246.4 GTexel/s. The MI308X delivers more than ten times the texture throughput. Pixel rate tells a different story, however. The RX 7600S has a pixel rate of 140.8 GPixel/s, while the MI308X is recorded at 0 MPixel/s, as it has no ROPs. The RX 7600S has 64 ROPs, whereas the MI308X has zero ROPs recorded.

Where Each One Wins

The RX 7600S wins in any scenario that requires rasterization output. Its 64 ROPs and 140.8 GPixel/s pixel rate enable traditional frame rendering for display, something the MI308X cannot do at all. The MI308X has no display outputs, making it unsuitable for any direct visual output task. The RX 7600S supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, providing full API compatibility for gaming and general graphics workloads. The MI308X lists no API support for DirectX, OpenGL, or Vulkan, confirming its role as a compute-focused device.

The MI308X wins decisively in compute throughput. Its 19,456 shading units dwarf the RX 7600S's 1,792 shading units. The MI308X has 1,216 texture mapping units versus 112 on the RX 7600S. The memory subsystem of the MI308X is in a different class entirely, with 192 GB of HBM3 memory on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The RX 7600S has 8 GB of GDDR6 memory on a 128-bit bus, providing 256.0 GB/s. The MI308X offers 24 times the memory capacity and roughly 20.8 times the bandwidth.

For machine learning and scientific computing, the MI308X's FP16 capability at 81.72 TFLOPS with 1:1 ratio is critical, as it indicates full-rate FP16 execution without the throughput penalty seen in consumer cards. The RX 7600S's FP16 output of 31.54 TFLOPS at a 2:1 ratio means its FP16 performance is half the FP32 rate, reflecting a different design priority. The MI308X's 5.32 TB/s memory bandwidth is suited for large model weights and datasets, while the RX 7600S's 256.0 GB/s is adequate for gaming textures and frame buffers.

Architecture Differences

The two GPUs come from different architectural families. The MI308X uses CDNA 3.0 architecture, designed specifically for compute accelerators. The RX 7600S uses RDNA 3.0 architecture, built for graphics rendering in mobile devices. The chip names reflect this divergence: the MI308X uses the Aqua Vanjaram chip, while the RX 7600S uses Navi 33 with the codename Hotpink Bonefish.

Manufacturing processes differ as well. The MI308X is built on a 5 nm process at TSMC, while the RX 7600S uses a 6 nm process, also at TSMC. The MI308X packs 153,000 million transistors on a 1017 mm² die, giving a transistor density of 150.4 million per mm². The RX 7600S contains 13,300 million transistors on a 204 mm² die, with a density of 65.2 million per mm². The MI308X has more than 11.5 times the transistor count and a die area roughly five times larger.

Clock behavior differs substantially. The MI308X has a base clock of 1000 MHz and a boost clock of 2100 MHz. The RX 7600S runs a base clock of 1500 MHz, a boost clock of 2200 MHz, and a game clock of 1865 MHz. The RX 7600S has higher base clocks, but the MI308X's massive parallel resources compensate for its lower base frequency.

Memory architecture is the most profound difference. The MI308X uses HBM3 memory at 1300 MHz with 5.2 Gbps effective transfer, across an 8192-bit bus. The RX 7600S uses GDDR6 at 2000 MHz with 16 Gbps effective transfer, across a 128-bit bus. The MI308X's bus width is 64 times wider than the RX 7600S, explaining the enormous bandwidth gap despite lower memory clock speeds.

The MI308X has no ray tracing cores recorded, while the RX 7600S includes 28 ray tracing cores. The MI308X consumes 750 W of power and uses an OAM Module slot width with no power connectors and a recommended 1150 W power supply. The RX 7600S consumes 75 W, ten times less, and uses an IGP slot width with no power connectors and no suggested power supply. The RX 7600S connects via PCIe 4.0 x16, while the MI308X uses PCIe 5.0 x16.

The Verdict

The data indicates two products with no functional overlap. The MI308X is a compute accelerator with no display outputs, no rasterization hardware, and no graphics API support. It delivers 81.72 TFLOPS of FP32 and FP16 compute, 5.32 TB/s of memory bandwidth, and 192 GB of HBM3 capacity. The RX 7600S is a mobile graphics processor with 64 ROPs, 28 ray tracing cores, full DirectX 12 Ultimate support, and a 140.8 GPixel/s pixel rate.

For workloads involving large-scale parallel computation, particularly FP16 matrix operations, the MI308X is the appropriate choice. Its 1:1 FP16 ratio means no throughput loss when operating in reduced precision, and its memory bandwidth supports massive data movement. The absence of display outputs and graphics APIs means it cannot render frames for human viewing.

For gaming, graphics rendering, or any task requiring visual output, the RX 7600S is the only viable option between the two. Its API support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 covers modern graphics workloads. Its 8 GB memory capacity and 256.0 GB/s bandwidth suit typical mobile gaming requirements. The RX 7600S sits in the 60th percentile against all GPUs, with an average benchmark score of 16696, placing it slightly above the NVIDIA T400 and RTX 5090 D V2 in recorded performance.

The MI308X has no recorded benchmarks and no nearest rivals in the database, making its real-world performance relative to other accelerators unverified. The RX 7600S has clear competitive positioning, with its nearest rival being the NVIDIA T400 4 GB at 0.6 percent higher average score, and the Tesla M4 at 1.4 percent higher. The RX 7600S outperforms both the NVIDIA T400 and the RTX 5090 D V2 by margins of 1.1 and 1.2 percent respectively.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI308X delivers 81.72 TFLOPS of FP32 performance, while the AMD Radeon RX 7600S delivers 15.77 TFLOPS.

Q: Does the MI308X support display output?

A: No, the MI308X has no display outputs recorded in the database, while the RX 7600S has portable device dependent display outputs.

Q: What is the memory bandwidth difference between these two GPUs?

A: The MI308X provides 5.32 TB/s of bandwidth from 192 GB of HBM3 memory on an 8192-bit bus. The RX 7600S provides 256.0 GB/s from 8 GB of GDDR6 memory on a 128-bit bus.

Q: How does the RX 7600S compare to its nearest rivals?

A: The RX 7600S has an average benchmark score of 16696. It is 1.1 percent higher than the NVIDIA T400 and 1.2 percent higher than the NVIDIA GeForce RTX 5090 D V2. It is 0.6 percent lower than the NVIDIA T400 4 GB and 1.4 percent lower than the NVIDIA Tesla M4.

Q: Which GPU has ray tracing capability?

A: The RX 7600S includes 28 ray tracing cores. The MI308X has no ray tracing cores recorded in the database.

Q: What are the power consumption figures for each GPU?

A: The MI308X has a TDP of 750 W with a suggested power supply of 1150 W. The RX 7600S has a TDP of 75 W with no suggested power supply recorded.