AMD Instinct MI308X vs AMD Radeon PRO W7400 Comparison

# FAQ

Q: What are the core architectural differences between the AMD Instinct MI308X and the AMD Radeon PRO W7400?

A: The MI308X uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, while the PRO W7400 uses RDNA 3.0 with the Hotpink Bonefish chip (Navi 33). The MI308X is built on a 5 nm process at TSMC with 153,000 million transistors on a 1017 mm² die, whereas the PRO W7400 uses a 6 nm process with 13,300 million transistors on a 204 mm² die.

Q: How do the memory configurations compare?

A: The MI308X has 192 GB of HBM3 memory with an 8192-bit bus and 5.32 TB/s bandwidth. The PRO W7400 has 8 GB of GDDR6 memory on a 128-bit bus with 172.8 GB/s bandwidth. The MI308X's memory bandwidth is roughly 30 times higher.

Q: What are the shading unit counts and compute capabilities?

A: The MI308X has 19,456 shading units, 1,216 TMUs, and 0 ROPs, delivering 81.72 TFLOPS FP32 and 81.72 TFLOPS FP16 (1:1). The PRO W7400 has 1,792 shading units, 112 TMUs, and 64 ROPs, delivering 7.885 TFLOPS FP32 and 7.885 TFLOPS FP16 (1:1).

Q: What is the power requirement difference?

A: The MI308X has a TDP of 750 W with a suggested PSU of 1150 W. The PRO W7400 has a TDP of 55 W with a suggested PSU of 250 W. The MI308X draws over 13 times the power of the PRO W7400.

Q: Do these cards support display outputs?

A: No. The MI308X has no display outputs, while the PRO W7400 has 4x DisplayPort 2.1 outputs. The MI308X is an OAM Module with no display capability, while the PRO W7400 is a single-slot card with full display support.

Q: What are the API supports for each?

A: The MI308X lists N/A for DirectX, OpenGL, and Vulkan. The PRO W7400 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

# Architecture Differences

The AMD Instinct MI308X and AMD Radeon PRO W7400 represent two fundamentally distinct design philosophies within AMD's product stack. The MI308X, based on CDNA 3.0, is a compute-optimized accelerator built around the Aqua Vanjaram chip. The PRO W7400, using RDNA 3.0 with the Hotpink Bonefish chip (Navi 33), targets workstation graphics and visualization workloads.

The manufacturing processes differ significantly. The MI308X uses a 5 nm process at TSMC, while the PRO W7400 uses a 6 nm process at the same foundry. This process advantage, combined with the massive die size difference (1017 mm² versus 204 mm²), contributes to the MI308X's substantially higher transistor count: 153,000 million versus 13,300 million. The transistor density also reflects this: the MI308X packs 150.4M transistors per mm², while the PRO W7400 achieves 65.2M per mm².

The compute pipelines diverge sharply. The MI308X has 19,456 shading units and 1,216 TMUs but zero ROPs, reflecting its pure compute focus. Its pixel rate is recorded as 0 MPixel/s. The PRO W7400 includes 1,792 shading units, 112 TMUs, and 64 ROPs, with a pixel rate of 70.40 GPixel/s. The MI308X also lacks ray tracing cores, while the PRO W7400 includes 28 RT cores, enabling hardware-accelerated ray tracing for graphics applications.

Memory architecture is another major divergence. The MI308X uses HBM3 with 192 GB capacity, an 8192-bit bus, and 5.32 TB/s bandwidth. The PRO W7400 uses GDDR6 with 8 GB capacity, a 128-bit bus, and 172.8 GB/s bandwidth. The MI308X's memory clock is 1300 MHz (5.2 Gbps effective), while the PRO W7400's memory clock is 1350 MHz (10.8 Gbps effective). The extremely wide bus on the MI308X enables its massive bandwidth advantage.

Clock speeds also differ: the MI308X has a base clock of 1000 MHz and boost of 2100 MHz, while the PRO W7400 has a base of 330 MHz and boost of 1100 MHz. These clock differences, combined with the hardware resources, result in the MI308X delivering 81.72 TFLOPS FP32 versus 7.885 TFLOPS for the PRO W7400, a ratio of roughly 10.4 to 1.

Power delivery and physical form factor reflect the different deployment scenarios. The MI308X is an OAM Module with a 750 W TDP and no power connectors listed, requiring a suggested 1150 W PSU. The PRO W7400 is a single-slot card with a 55 W TDP, no power connectors, and a suggested 250 W PSU. The MI308X has no display outputs, while the PRO W7400 provides 4x DisplayPort 2.1. The PRO W7400 measures 168 mm by 69 mm by 20 mm, while the MI308X's dimensions are not recorded.

API support further highlights the divide. The MI308X lists N/A for DirectX, OpenGL, and Vulkan, indicating it is not designed for graphics API workloads. The PRO W7400 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, making it suitable for professional graphics applications.

# Where Each One Wins

The data shows these two GPUs target entirely different workloads, and each wins in its respective domain.

The MI308X dominates in raw compute throughput and memory capacity. With 81.72 TFLOPS FP32 and FP16, it delivers approximately 10.4 times the compute performance of the PRO W7400's 7.885 TFLOPS. Its 192 GB HBM3 memory with 5.32 TB/s bandwidth enables working with datasets that would be impossible on the PRO W7400's 8 GB GDDR6 with 172.8 GB/s bandwidth. For large-scale scientific computing, AI training, and data center acceleration, the MI308X is the clear winner. Its 750 W TDP and OAM form factor indicate it is designed for server deployments where power and space are not constraints.

The PRO W7400 wins in graphics and display functionality. It has 64 ROPs and a pixel rate of 70.40 GPixel/s, while the MI308X has zero ROPs and zero pixel rate. The PRO W7400 includes 28 RT cores for hardware ray tracing, a feature absent from the MI308X. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, whereas the MI308X lists no graphics API support. The PRO W7400 provides 4x DisplayPort 2.1 outputs, making it suitable for multi-monitor professional workstations. Its 55 W TDP and single-slot design fit into standard workstation builds, and its 168 mm length and 69 mm height are manageable for most chassis.

The power efficiency comparison strongly favors the PRO W7400. At 55 W versus 750 W, the PRO W7400 delivers 7.885 TFLOPS at a fraction of the power draw. The MI308X, while delivering much higher absolute performance, requires over 13 times the power. For workloads where power consumption is a limiting factor, the PRO W7400 is the more practical choice.

The release timelines also matter. The MI308X was released on December 5, 2023, while the PRO W7400 was released on August 2, 2025. The PRO W7400 is marked as "Active" in production status, while the MI308X's production status is not recorded.

# Specification Differences

The key specification differences between the two GPUs are:

• Chip: MI308X uses Aqua Vanjaram; PRO W7400 uses Hotpink Bonefish (Navi 33)
• Architecture: CDNA 3.0 versus RDNA 3.0
• Process node: 5 nm versus 6 nm (both TSMC)
• Transistors: 153,000 million versus 13,300 million
• Die size: 1017 mm² versus 204 mm²
• Transistor density: 150.4M / mm² versus 65.2M / mm²
• Base clock: 1000 MHz versus 330 MHz
• Boost clock: 2100 MHz versus 1100 MHz
• Memory clock: 1300 MHz (5.2 Gbps effective) versus 1350 MHz (10.8 Gbps effective)
• Memory size: 192 GB (HBM3) versus 8 GB (GDDR6)
• Memory bus width: 8192 bit versus 128 bit
• Memory bandwidth: 5.32 TB/s versus 172.8 GB/s
• Shading units: 19,456 versus 1,792
• TMUs: 1,216 versus 112
• ROPs: 0 versus 64
• RT cores: None versus 28
• Pixel rate: 0 MPixel/s versus 70.40 GPixel/s
• Texture rate: 2,553.6 GTexel/s versus 123.2 GTexel/s
• FP32: 81.72 TFLOPS versus 7.885 TFLOPS
• FP16: 81.72 TFLOPS (1:1) versus 7.885 TFLOPS (1:1)
• TDP: 750 W versus 55 W
• Slot width: OAM Module versus Single-slot
• Power connectors: None for both
• Suggested PSU: 1150 W versus 250 W
• Bus interface: PCIe 5.0 x16 versus PCIe 4.0 x8
• Display outputs: No outputs versus 4x DisplayPort 2.1
• APIs: N/A for DirectX, OpenGL, Vulkan versus DirectX 12 Ultimate (12_2), OpenGL 4.6, Vulkan 1.4
• Dimensions: Not recorded versus 168 mm x 69 mm x 20 mm
• Production status: Not recorded versus Active
• Release date: December 5, 2023 versus August 2, 2025
• Predecessor: Radeon Instinct versus Radeon Pro Vega

# Head-to-Head Benchmarks

The database does not contain direct head-to-head benchmark results between these two GPUs. However, the recorded specification-level data provides clear comparative insights.

The largest performance gap appears in memory bandwidth. The MI308X delivers 5.32 TB/s, which is approximately 30.8 times the PRO W7400's 172.8 GB/s. This difference is driven by the 8192-bit memory bus versus 128-bit, and the HBM3 versus GDDR6 memory types. The MI308X's 192 GB capacity is 24 times the PRO W7400's 8 GB.

Compute throughput shows a similar magnitude of difference. The MI308X achieves 81.72 TFLOPS FP32, which is approximately 10.4 times the PRO W7400's 7.885 TFLOPS. The FP16 performance follows the same ratio at 81.72 versus 7.885 TFLOPS, since both cards implement 1:1 FP16:FP32 ratios.

Texture rate heavily favors the MI308X: 2,553.6 GTexel/s versus 123.2 GTexel/s, a difference of roughly 20.7 times. This reflects the much higher TMU count (1,216 versus 112) and higher clock speeds.

The PRO W7400 wins in pixel throughput, delivering 70.40 GPixel/s versus 0 MPixel/s for the MI308X. This is because the MI308X has no ROPs, making it incapable of rasterization. The PRO W7400 also has 28 RT cores, while the MI308X has none.

Clock speed comparisons show the MI308X running at 1000 MHz base and 2100 MHz boost, versus 330 MHz base and 1100 MHz boost for the PRO W7400. The MI308X's boost clock is approximately 1.9 times higher.

Power consumption is the reverse of compute performance. The MI308X draws 750 W TDP and suggests a 1150 W PSU, while the PRO W7400 draws 55 W TDP and suggests a 250 W PSU. The MI308X's TDP is 13.6 times larger.

# The Verdict

The benchmark data indicates these two GPUs serve completely different user populations, and the choice depends entirely on the intended workload.

The AMD Instinct MI308X is for compute-intensive, data center applications. Its 81.72 TFLOPS FP32 and FP16 performance, 192 GB HBM3 memory, and 5.32 TB/s bandwidth make it suitable for large-scale scientific computing, AI training, and high-performance computing tasks. The lack of display outputs, ROPs, and graphics API support confirms it is not intended for any graphics workload. The 750 W TDP and OAM Module form factor require server infrastructure designed for high-density accelerators. The December 5, 2023 release date places it in the previous generation of Instinct products.

The AMD Radeon PRO W7400 is for professional graphics workstations. Its 64 ROPs, 28 RT cores, and pixel rate of 70.40 GPixel/s enable rasterization and ray tracing. Support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 makes it compatible with professional graphics software. The 4x DisplayPort 2.1 outputs support multi-monitor configurations. The 55 W TDP and single-slot design fit into standard workstation builds, and the 168 mm length and 69 mm height are compact. Its August 2, 2025 release date and "Active" production status indicate it is a current product.

The data suggests that any comparison of these two cards based on raw performance numbers would be misleading. The MI308X outperforms the PRO W7400 by factors of 10 to 30 in compute and memory metrics, but it cannot render any graphics. The PRO W7400, despite its much lower absolute performance, provides the graphics capabilities that the MI308X entirely lacks.

The power efficiency picture is also clear: the PRO W7400 delivers its 7.885 TFLOPS at 55 W, while the MI308X requires 750 W for 81.72 TFLOPS. For workloads that fit within 8 GB of memory and do not require massive parallel compute, the PRO W7400 offers a much lower power footprint. For workloads that need 192 GB of memory and 5.32 TB/s bandwidth, only the MI308X can handle them.

The release timeline matters for procurement decisions. The MI308X from December 2023 may be superseded, while the PRO W7400 from August 2025 is current. The predecessor relationships also differ: the MI308X follows the Radeon Instinct lineage, while the PRO W7400 follows Radeon Pro Vega. Neither card has a recorded successor.

In summary, the MI308X is for users who need maximum compute density and memory capacity in a server environment. The PRO W7400 is for users who need professional graphics, display outputs, and ray tracing in a workstation. The data does not support picking one over the other for the same task, because they do not overlap in functionality.