AMD Instinct MI455X vs NVIDIA Jetson T4000 Comparison

FAQ

Q: What are the core specifications of the AMD Instinct MI455X and NVIDIA Jetson T4000?

A: The AMD Instinct MI455X uses the MI450 256CU chip on a 2 nm TSMC process, with 320,000 million transistors on a 2990 mm² die. The NVIDIA Jetson T4000 uses the GB10B chip on a 5 nm TSMC process, with a 391 mm² die size. The MI455X has 32,768 shading units, while the Jetson T4000 has 1,536 shading units.

Q: How do the memory configurations differ between the two products?

A: The AMD Instinct MI455X features 432 GB of HBM4 memory on a 24,576-bit bus, delivering 23.3 TB/s of bandwidth. The NVIDIA Jetson T4000 features 64 GB of LPDDR5X memory on a 256-bit bus, delivering 273.2 GB/s of bandwidth.

Q: What are the clock speeds for each product?

A: The AMD Instinct MI455X has a base clock of 1000 MHz and a boost clock of 2400 MHz, with memory running at 1900 MHz (7.6 Gbps effective). The NVIDIA Jetson T4000 has a fixed base and boost clock of 1530 MHz, with memory running at 1067 MHz (8.5 Gbps effective).

Q: What is the power consumption profile for each?

A: The AMD Instinct MI455X has a TDP of 2300 W and requires a suggested PSU of 2700 W. The NVIDIA Jetson T4000 has a TDP of 90 W and a suggested PSU of 250 W.

Q: What compute performance do the two products deliver?

A: The AMD Instinct MI455X delivers 157.3 TFLOPS FP32 and 157.3 TFLOPS FP16 (1:1). The NVIDIA Jetson T4000 delivers 4.700 TFLOPS FP32 and 4.700 TFLOPS FP16 (1:1).

Q: What are the physical form factors and connectivity options?

A: The AMD Instinct MI455X is an EAM Module with PCIe 6.0 x16 interface and no display outputs. The NVIDIA Jetson T4000 is an IGP with PCIe 5.0 x8 interface, no display outputs, and dimensions of 87 mm length, 100 mm height, and 15 mm width.

The Verdict

The recorded data presents two fundamentally different products with no head-to-head benchmark results available. The AMD Instinct MI455X is positioned as a massive compute accelerator with extreme memory capacity and bandwidth, while the NVIDIA Jetson T4000 is a compact embedded processor with modest power requirements.

The AMD Instinct MI455X should be selected by users who require maximum compute throughput. The data shows 157.3 TFLOPS FP32 performance, which is 33.5 times higher than the Jetson T4000's 4.700 TFLOPS. The MI455X also offers 432 GB of HBM4 memory with 23.3 TB/s bandwidth, figures that dwarf the Jetson T4000's 64 GB LPDDR5X at 273.2 GB/s. This configuration suits workloads that demand massive parallel processing and large data residency.

The NVIDIA Jetson T4000 should be selected for applications where power efficiency and physical footprint are critical. The data shows a 90 W TDP versus 2300 W, and an IGP form factor with dimensions of 87 mm by 100 mm by 15 mm. The Jetson T4000 includes 12 RT cores and 64 tensor cores, features entirely absent from the MI455X specification. This makes it suitable for edge deployments or systems with strict power and space constraints.

Both products record a 50th percentile position among all GPUs in the database, with an average benchmark score of 0 for each. This indicates that neither has established a performance baseline in the current dataset, so direct comparisons rely entirely on the recorded specifications.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark results between the AMD Instinct MI455X and the NVIDIA Jetson T4000. Both entries show zero wins in head-to-head comparisons and zero benchmark scores. The winsA and winsB fields are both 0, confirming that no direct measurement data exists.

Without benchmark scores, the comparison must rest on the recorded specification data. The FP32 compute figures provide the clearest differentiation. The MI455X delivers 157.3 TFLOPS, which is 33.5 times the Jetson T4000's 4.700 TFLOPS. The FP16 figures are identical to the FP32 figures for both products, indicating a 1:1 ratio in each case.

Texture processing shows a similar gap. The MI455X achieves 2,457.6 GTexel/s, which is 33.5 times the Jetson T4000's 73.44 GTexel/s. The pixel rates differ in nature: the MI455X records 0 MPixel/s while the Jetson T4000 delivers 24.48 GPixel/s. This reflects the MI455X's 0 ROPs count versus the Jetson T4000's 16 ROPs.

Memory bandwidth presents the largest proportional difference. The MI455X's 23.3 TB/s is 85.3 times the Jetson T4000's 273.2 GB/s. The memory bus widths, 24,576 bits versus 256 bits, explain this gap. The MI455X also has 6.75 times the memory capacity of the Jetson T4000.

Clock behavior differs between the two. The MI455X has a 1400 MHz boost range over its base clock, suggesting dynamic frequency scaling. The Jetson T4000 runs at a fixed 1530 MHz for both base and boost. The MI455X's memory clock of 1900 MHz is higher than the Jetson T4000's 1067 MHz, though the effective Gbps figures are closer at 7.6 Gbps versus 8.5 Gbps.

Specification Differences

The AMD Instinct MI455X and NVIDIA Jetson T4000 differ across nearly every recorded specification field. The process nodes differ, with the MI455X using 2 nm and the Jetson T4000 using 5 nm, both fabricated by TSMC.

Transistor counts show a stark contrast. The MI455X contains 320,000 million transistors, while the Jetson T4000's transistor count is recorded as unknown. The die sizes also differ substantially: 2990 mm² for the MI455X versus 391 mm² for the Jetson T4000. The MI455X records a transistor density of 107.0M per mm², while no density figure exists for the Jetson T4000.

Clock specifications show the MI455X with base and boost clocks of 1000 MHz and 2400 MHz respectively, while the Jetson T4000 operates at a constant 1530 MHz. Memory clocks are 1900 MHz for the MI455X and 1067 MHz for the Jetson T4000.

Memory configuration differences include size (432 GB versus 64 GB), type (HBM4 versus LPDDR5X), bus width (24,576 bit versus 256 bit), and bandwidth (23.3 TB/s versus 273.2 GB/s).

Compute unit counts differ in every category. The MI455X has 32,768 shading units, 1,024 TMUs, and 0 ROPs. The Jetson T4000 has 1,536 shading units, 48 TMUs, and 16 ROPs. The Jetson T4000 additionally has 12 RT cores and 64 tensor cores, while the MI455X records null values for both.

Power specifications show the MI455X at 2300 W TDP with a suggested PSU of 2700 W, versus the Jetson T4000 at 90 W TDP with a suggested PSU of 250 W. Both use no power connectors.

Form factors differ, with the MI455X being an EAM Module and the Jetson T4000 being an IGP. Bus interfaces are PCIe 6.0 x16 for the MI455X and PCIe 5.0 x8 for the Jetson T4000. Both have no display outputs.

Release dates are recorded as 2026-07-22 for the MI455X and 2026-01-04 for the Jetson T4000. The MI455X lists "Radeon Instinct" as its predecessor with no successor recorded. The Jetson T4000 lists "Server Hopper" as predecessor and "Server Rubin" as successor. The Jetson T4000 records a launch MSRP of 1,999 USD, while no launch MSRP exists for the MI455X.

Architecture Differences

The two products represent different architecture generations from their respective manufacturers. The AMD Instinct MI455X uses the CDNA 5.0 architecture, specifically the MI450 256CU chip. The NVIDIA Jetson T4000 uses the Blackwell architecture, specifically the GB10B chip.

The MI455X belongs to the Instinct (MIx) generation, while the Jetson T4000 belongs to the Server Blackwell (Bxx) generation. Both architectures target compute workloads rather than graphics, as indicated by the N/A values for DirectX, OpenGL, and Vulkan APIs on both products.

The manufacturing processes reflect different design philosophies. The MI455X uses a 2 nm process, which is smaller than the Jetson T4000's 5 nm process. However, the MI455X's die size of 2990 mm² is substantially larger than the Jetson T4000's 391 mm², indicating that the MI455X prioritizes raw compute scale over manufacturing efficiency.

The shading architecture differs significantly. The MI455X allocates 32,768 shading units and 1,024 TMUs, with no ROPs, reflecting a pure compute design. The Jetson T4000 allocates 1,536 shading units, 48 TMUs, and 16 ROPs, suggesting a more balanced compute pipeline.

The Jetson T4000 includes dedicated ray tracing and tensor cores, with 12 RT cores and 64 tensor cores recorded. The MI455X has null values for both RT cores and tensor cores, indicating that these features are not present or not specified in its architecture. This represents a functional difference: the Jetson T4000 can execute ray tracing and tensor operations through dedicated hardware, while the MI455X relies on its general-purpose compute units.

Memory architecture differences are pronounced. The MI455X uses HBM4 memory with a 24,576-bit bus, achieving 23.3 TB/s bandwidth. The Jetson T4000 uses LPDDR5X memory with a 256-bit bus, achieving 273.2 GB/s bandwidth. The MI455X's memory subsystem is designed for maximum throughput, while the Jetson T4000's is designed for adequate bandwidth within a low-power envelope.

The production status differs, with the Jetson T4000 recorded as "Active" and the MI455X having no production status recorded. The Jetson T4000 also has defined physical dimensions (87 mm length, 100 mm height, 15 mm width), while the MI455X has no dimensions recorded.