AMD Instinct MI300A vs AMD Radeon RX 7600 XT Comparison

AMD Instinct MI300A and AMD Radeon RX 7600 XT occupy opposite ends of AMD’s compute spectrum, and the recorded data reflects that split clearly. The MI300A is a datacenter accelerator with no display outputs and no graphics API support, while the RX 7600 XT is an active production graphics card with full DirectX, OpenGL, and Vulkan capabilities. Benchmark results for the MI300A are absent from the database, leaving the RX 7600 XT’s measured scores as the only quantitative comparison points. The MI300A’s architectural specifications, however, provide a definitive contrast in raw compute capacity, memory subsystem, and power envelope.

Where Each One Wins

The RX 7600 XT wins in every measurable benchmark category because it is the only one of the two with recorded test scores. Its average benchmark score is 17,083, placing it at the 60th percentile of all GPUs in the database. The MI300A has an average benchmark score of 0 and sits at the 50th percentile, with no benchmark entries. This does not indicate equivalence; it reflects that the MI300A is not subjected to the same consumer-oriented test suite.

In standard rasterization workloads, the RX 7600 XT delivers strong results. Its PassMark G3D score is 17,132, and its DirectX 11 score is 167. The DirectX 9 score is 228, which is the highest of its legacy API results. DirectX 10 and DirectX 12 scores are 85 and 65 respectively. The compute side is represented by a PassMark GPU Compute score of 8,987 and a Geekbench OpenCL score of 92,426. Vulkan performance is measured at 48,366 in Geekbench, while 3DMark Steel Nomad DX12 produces 2,348 points.

The MI300A, by contrast, is built for a different class of work. It has no pixel rate, no ROPs, and no display outputs. Its API support is marked as N/A for DirectX, OpenGL, and Vulkan. The data shows that this accelerator is not intended for frame rendering or interactive graphics. Its wins are structural rather than benchmark-based: 128 GB of HBM3 memory, 5.32 TB/s of memory bandwidth, and 61.29 TFLOPS of FP32 throughput. These are datacenter-scale specifications.

Architecture Differences

The two chips share a manufacturer but diverge in nearly every architectural detail. The MI300A uses the CDNA 3.0 architecture on a 5 nm TSMC process, while the RX 7600 XT uses RDNA 3.0 on a 6 nm TSMC process. The MI300A’s chip is Aqua Vanjaram, and the RX 7600 XT’s chip is Navi 33, codenamed Hotpink Bonefish.

Transistor counts differ by an order of magnitude. The MI300A integrates 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4M per mm². The RX 7600 XT contains 13,300 million transistors on a 204 mm² die, with a density of 65.2M per mm². The MI300A’s die is roughly five times larger and packs over eleven times the transistors.

Compute resources follow the same pattern. The MI300A has 14,592 shading units and 912 texture mapping units. The RX 7600 XT has 2,048 shading units, 128 TMUs, and 64 ROPs. The MI300A has no ROPs, which aligns with its lack of display and rasterization hardware. The RX 7600 XT includes 32 ray tracing cores, a feature class the MI300A does not list.

Clock behavior also contrasts sharply. The MI300A runs at a 1000 MHz base and a 2100 MHz boost. The RX 7600 XT starts at 1980 MHz base, reaches 2470 MHz in game mode, and boosts to 2755 MHz. Despite the lower clocks, the MI300A produces 1,915.2 GTexel/s of texture rate versus 352.6 GTexel/s for the RX 7600 XT, a consequence of its far larger execution resource pool.

Memory subsystems are completely different classes. The MI300A uses 128 GB of HBM3 on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The RX 7600 XT uses 16 GB of GDDR6 on a 128-bit bus, delivering 288.0 GB/s. The MI300A’s memory bandwidth is over eighteen times higher. The MI300A memory clock is listed at 1300 MHz with 5.2 Gbps effective, while the RX 7600 XT memory clock is 2250 MHz with 18 Gbps effective.

Power and physical design diverge as well. The MI300A has a TDP of 750 W and is an OAM module with no power connectors and no suggested PSU rating that applies to standard builds. The RX 7600 XT has a 190 W TDP, uses a single 8-pin connector, and requires a 450 W suggested PSU. The RX 7600 XT is a dual-slot card measuring 204 mm in length and 115 mm in height. The MI300A’s dimensions are not recorded. Bus interfaces differ: PCIe 5.0 x16 for the MI300A, PCIe 4.0 x8 for the RX 7600 XT.

Release timing is also distinct. The MI300A launched on 2023-12-05, while the RX 7600 XT launched on 2024-01-23. The RX 7600 XT has a launch MSRP of 329 USD. The MI300A has no recorded launch MSRP. The RX 7600 XT lists a predecessor of Navi II and a successor of Navi IV. The MI300A’s predecessor is Radeon Instinct, with no successor recorded.

The Verdict

The data indicates that these two products serve mutually exclusive workloads. The MI300A is a compute accelerator with no graphics pipeline, no display outputs, and no consumer API support. Its 128 GB HBM3 pool and 5.32 TB/s bandwidth position it for memory-bound datacenter tasks, while its 61.29 TFLOPS FP32 rate and 1,915.2 GTexel/s texture rate provide massive throughput for parallel workloads. The RX 7600 XT is a conventional graphics card with full API coverage, ray tracing hardware, and a complete set of benchmark scores.

For users selecting a card for rendering, gaming, or any DirectX, OpenGL, or Vulkan workload, the RX 7600 XT is the only viable option in this comparison. Its 60th percentile standing and 17,083 average score are supported by scores across multiple test suites. Its nearest rivals in the database include the NVIDIA GeForce RTX 3070, which scores 17,208 and trails by 0.7%, and the NVIDIA GeForce GTX 690, which scores 17,037 and trails by 0.3%. The RX 7600 XT also leads the AMD Radeon HD 7970M by 0.4% and the NVIDIA Tesla M4 by 0.9%.

For users with compute-heavy, non-graphics workloads, the MI300A’s specifications dominate. Its memory capacity is eight times larger than the RX 7600 XT’s, and its bandwidth is over eighteen times higher. Its FP32 throughput is roughly 2.7 times that of the RX 7600 XT’s 22.57 TFLOPS. The MI300A also draws 750 W versus 190 W, which is consistent with its datacenter orientation. No benchmark data exists for the MI300A, so direct performance comparisons cannot be quantified from the database, but the architectural record is unambiguous about the intended use case.

FAQ

Q: Which GPU has higher FP32 performance?

A: The AMD Instinct MI300A delivers 61.29 TFLOPS of FP32 throughput, while the AMD Radeon RX 7600 XT delivers 22.57 TFLOPS.

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

A: The MI300A provides 5.32 TB/s of bandwidth from 128 GB of HBM3 on an 8192-bit bus. The RX 7600 XT provides 288.0 GB/s from 16 GB of GDDR6 on a 128-bit bus.

Q: Does the MI300A support DirectX or Vulkan?

A: No. The MI300A lists DirectX, OpenGL, and Vulkan support as N/A. The RX 7600 XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What are the nearest rivals to the RX 7600 XT in the database?

A: The nearest rivals are the NVIDIA GeForce RTX 3070 with an average score of 17,208 and a delta of -0.7%, the NVIDIA GeForce GTX 690 with 17,037 and 0.3%, the AMD Radeon HD 7970M with 17,019 and 0.4%, and the NVIDIA Tesla M4 with 16,932 and 0.9%.

Q: What is the power consumption of each card?

A: The MI300A has a TDP of 750 W, while the RX 7600 XT has a TDP of 190 W. The RX 7600 XT uses a single 8-pin power connector; the MI300A has no power connectors listed.

Q: Which card has ray tracing hardware?

A: The RX 7600 XT includes 32 ray tracing cores. The MI300A does not list ray tracing cores.

Head-to-Head Benchmarks

The RX 7600 XT is the only unit with recorded scores, so all measured comparisons rest on its results. Its PassMark G3D score of 17,132 and average benchmark score of 17,083 place it just ahead of the NVIDIA GeForce GTX 690, which posts 17,037, a 0.3% gap. The margin over the AMD Radeon HD 7970M is 0.4%, with that card scoring 17,019. The NVIDIA Tesla M4 trails by 0.9% at 16,932. The only negative delta among the nearest rivals belongs to the NVIDIA GeForce RTX 3070, which leads the RX 7600 XT by 0.7% with a score of 17,208.

In compute-oriented tests, the RX 7600 XT shows a different profile. Its Geekbench OpenCL score is 92,426, while its Geekbench Vulkan score is 48,366. The PassMark GPU Compute score is 8,987. The 3DMark Steel Nomad DX12 test yields 2,348 points. Legacy DirectX performance is uneven: DirectX 9 scores 228, DirectX 11 scores 167, DirectX 10 scores 85, and DirectX 12 scores 65. The PassMark G2D score of 1,030 reflects 2D graphics throughput.

The MI300A has no corresponding entries. Its pixel rate is 0 MPixel/s, and its texture rate is 1,915.2 GTexel/s. The RX 7600 XT has a pixel rate of 176.3 GPixel/s and a texture rate of 352.6 GTexel/s. These numbers reinforce the MI300A’s lack of rasterization hardware while highlighting its superior texture throughput.

The MI300A’s FP32 figure of 61.29 TFLOPS is 2.7 times the RX 7600 XT’s 22.57 TFLOPS. The RX 7600 XT also lists FP16 at 22.57 TFLOPS with a 1:1 ratio, while the MI300A does not provide an FP16 figure. Memory bandwidth is the most lopsided metric: 5.32 TB/s versus 288.0 GB/s, an 18.5x advantage for the MI300A. Memory capacity is 128 GB versus 16 GB, an 8x advantage.

The RX 7600 XT’s clock advantage is significant. Its boost clock of 2755 MHz is 31% higher than the MI300A’s 2100 MHz boost, and its base clock of 1980 MHz is nearly double the MI300A’s 1000 MHz base. The RX 7600 XT also has a game clock of 2470 MHz, which has no counterpart on the MI300A. These higher clocks do not compensate for the MI300A’s larger execution resource pool in raw throughput calculations.

Power efficiency favors the RX 7600 XT in the recorded data. The RX 7600 XT delivers 22.57 TFLOPS at 190 W, while the MI300A delivers 61.29 TFLOPS at 750 W. Per watt, the RX 7600 XT produces approximately 0.119 TFLOPS/W, while the MI300A produces approximately 0.082 TFLOPS/W. The RX 7600 XT is nearly 45% more efficient on this metric, though the comparison does not account for the memory system differences or the datacenter-oriented design of the MI300A.

The launch dates place the MI300A roughly seven weeks ahead of the RX 7600 XT, with the former releasing on 2023-12-05 and the latter on 2024-01-23. The RX 7600 XT’s launch MSRP is 329 USD. The MI300A has no launch MSRP recorded. The RX 7600 XT is marked as Active in production status, while the MI300A’s production status is not recorded. Both are AMD products, but the MI300A belongs to the Instinct (MIx) generation, and the RX 7600 XT belongs to the Navi III (RX 7000) generation.