AMD Instinct MI300A vs AMD Radeon PRO W7900 Comparison

The Verdict

The database comparison between the AMD Instinct MI300A and the AMD Radeon PRO W7900 reveals two fundamentally different accelerators. The MI300A is a data center compute module with no display outputs, no graphics API support, and a 50th percentile standing among all GPUs. The Radeon PRO W7900 is a workstation graphics card with full API support, a 94th percentile ranking, and a recorded average benchmark score of 110,725. The data shows two distinct products serving different roles; the MI300A has no benchmark entries in the database, while the W7900 has two recorded scores. The W7900 is the only one of the two with measurable graphics performance data.

FAQ

Q: Which card has more memory bandwidth?

A: The Instinct MI300A delivers 5.32 TB/s of bandwidth from 128 GB of HBM3 memory on an 8192-bit bus. The Radeon PRO W7900 provides 864.0 GB/s from 48 GB of GDDR6 memory on a 384-bit bus. The MI300A's bandwidth is substantially higher.

Q: What is the difference in FP32 compute performance?

A: The MI300A records 61.29 TFLOPS of FP32 throughput, while the W7900 records 61.32 TFLOPS. The two figures are nearly identical, with a difference of only 0.03 TFLOPS in favor of the W7900.

Q: Does the MI300A support graphics APIs?

A: No. The MI300A lists DirectX as N/A, OpenGL as N/A, and Vulkan as N/A. It also has no display outputs. The W7900 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and provides 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1.

Q: How does the power draw compare?

A: The MI300A has a TDP of 750 W, while the W7900 has a TDP of 295 W. The suggested PSU for the MI300A is 1150 W, whereas the W7900 suggests 600 W. The MI300A uses an OAM Module slot with no power connectors, and the W7900 is a triple-slot card using 2x 8-pin connectors.

Q: What is the release timeline for both products?

A: The Radeon PRO W7900 was released on 2023-05-25, and the Instinct MI300A followed on 2023-12-05. The W7900's predecessor is the Radeon Pro Vega, and the MI300A's predecessor is the Radeon Instinct.

Q: How does the W7900 compare to its nearest rivals?

A: The W7900's average score of 110,725 places it 1% above the AMD Radeon Pro Vega II (109,617), 3.2% above the AMD Radeon Pro W6600X (107,342), 2.8% below the NVIDIA RTX A5500 Mobile (113,944), and 3.2% below the NVIDIA Tesla V100 SXM2 16 GB (114,395).

Architecture Differences

The MI300A uses the Aqua Vanjaram chip built on CDNA 3.0 architecture, while the W7900 uses the Navi 31 chip built on RDNA 3.0 architecture. Both are fabricated on a 5 nm process at TSMC, but the transistor counts diverge sharply. The MI300A packs 153,000 million transistors on a 1017 mm² die, giving a transistor density of 150.4M per mm². The W7900 contains 57,700 million transistors on a 529 mm² die, with a density of 109.1M per mm². The MI300A's die is nearly twice as large and carries nearly three times the transistor count.

The MI300A belongs to the Instinct (MIx) generation, and its memory subsystem uses HBM3 with a 1300 MHz clock and 5.2 Gbps effective data rate. The W7900 belongs to the Radeon Pro Navi (Navi III Series) generation, codenamed Plum Bonito, and uses GDDR6 memory at 2250 MHz with 18 Gbps effective. The MI300A has no ROPs, recording 0 MPixel/s pixel rate, while the W7900 has 192 ROPs and a 479.0 GPixel/s pixel rate. The MI300A lacks ray tracing cores, whereas the W7900 includes 96 ray tracing cores. Neither product lists tensor cores in the database.

The MI300A has no graphics API support at all, while the W7900 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300A has no display outputs, and the W7900 offers 3x DisplayPort 2.1 plus 1x mini-DisplayPort 2.1. The MI300A is an OAM Module with no power connectors, while the W7900 is a triple-slot card requiring 2x 8-pin power connectors.

Specification Differences

The clock speeds differ notably. The MI300A has a base clock of 1000 MHz and a boost clock of 2100 MHz. The W7900 has a base clock of 1760 MHz and a boost clock of 2495 MHz. The W7900 runs at higher clocks in both states.

The compute unit resources differ. The MI300A has 14,592 shading units, 912 TMUs, and 0 ROPs. The W7900 has 6,144 shading units, 384 TMUs, and 192 ROPs. The texture rate for the MI300A is 1,915.2 GTexel/s, while the W7900 delivers 958.1 GTexel/s. The MI300A has more than double the shading units and more than double the texture rate.

Memory capacity and bandwidth differ significantly. The MI300A has 128 GB of HBM3 on an 8192-bit bus with 5.32 TB/s bandwidth. The W7900 has 48 GB of GDDR6 on a 384-bit bus with 864.0 GB/s bandwidth. The MI300A offers roughly six times the bandwidth and more than double the capacity.

The power profiles are far apart. The MI300A has a TDP of 750 W and suggests a 1150 W PSU. The W7900 has a TDP of 295 W and suggests a 600 W PSU. The bus interfaces differ: the MI300A uses PCIe 5.0 x16, and the W7900 uses PCIe 4.0 x16.

Physical dimensions are only recorded for the W7900: 280 mm length, 110 mm height, and 51 mm width. The MI300A has no dimensions listed. The W7900's production status is Active, while the MI300A has no production status recorded. The W7900 has a launch MSRP of 3,999 USD. The MI300A has no launch MSRP in the database.

Head-to-Head Benchmarks

The head-to-head benchmark table in the database is empty, and the win counts are zero for both products. The MI300A has no benchmark entries at all. The only recorded data comes from the W7900, which has two Geekbench results: 84,379 in OpenCL and 137,070 in Vulkan. The average of those two scores is 110,725, which places the W7900 in the 94th percentile among all GPUs.

The W7900's nearest rivals provide context for its standing. It sits 1% above the AMD Radeon Pro Vega II (109,617) and 3.2% above the AMD Radeon Pro W6600X (107,342). It trails the NVIDIA RTX A5500 Mobile (113,944) by 2.8% and the NVIDIA Tesla V100 SXM2 16 GB (114,395) by 3.2%. These deltas are modest, indicating that the W7900 sits in a tight cluster of workstation and data center accelerators.

The MI300A has no comparable benchmark data. Its percentile of 50 among all GPUs reflects the absence of recorded measurements rather than a performance estimate. The database shows no wins for either product in a head-to-head comparison because no direct comparison benchmarks exist.

Where Each One Wins

The Radeon PRO W7900 wins in every measurable category in this database. It has recorded benchmark scores, a 94th percentile ranking, and full graphics API support. Its FP32 throughput of 61.32 TFLOPS edges out the MI300A's 61.29 TFLOPS. It also has a higher base clock (1760 MHz vs 1000 MHz) and a higher boost clock (2495 MHz vs 2100 MHz). The W7900 is the only one of the two with pixel rendering capability, delivering 479.0 GPixel/s through its 192 ROPs and 96 ray tracing cores. It supports DirectX 12 Ultimate and Vulkan 1.4, and it provides display outputs for direct monitor connection.

The Instinct MI300A wins in memory capacity, memory bandwidth, texture rate, and transistor scale. It offers 128 GB of HBM3 versus 48 GB of GDDR6, and 5.32 TB/s versus 864.0 GB/s. Its texture rate of 1,915.2 GTexel/s is double the W7900's 958.1 GTexel/s. It carries 153,000 million transistors on a 1017 mm² die, compared to 57,700 million on 529 mm². Its 14,592 shading units and 912 TMUs far exceed the W7900's 6,144 and 384, respectively.

The MI300A also uses the newer PCIe 5.0 x16 interface, while the W7900 uses PCIe 4.0 x16. The MI300A has no display outputs and no graphics API support, so its wins are confined to compute-oriented specifications. The W7900 has a recorded production status of Active, a triple-slot cooler, and a launch MSRP of 3,999 USD, none of which the MI300A's entry includes.

The data indicates that the W7900 is the only one of the two that can be evaluated through the database's benchmark framework. The MI300A's specifications point toward a compute and memory throughput role, but without recorded benchmarks, its actual performance remains unmeasured. The W7900's 94th percentile and its narrow margins against rivals in the 1% to 3.2% range suggest consistent performance across its peer group.