NVIDIA Jetson T4000 vs NVIDIA Rubin GPU Comparison

The Verdict

The NVIDIA Jetson T4000 and NVIDIA Rubin GPU occupy entirely separate positions in the server GPU landscape. The Jetson T4000 is a compact, low-power embedded compute module built on the Blackwell architecture, designed for edge deployment with its integrated package and 90 W thermal envelope. The Rubin GPU is a massive datacenter accelerator on the Rubin architecture, consuming 2300 W and delivering far higher raw compute throughput. The data shows no benchmark overlap between the two units, as the head-to-head benchmark table is empty, so the verdict rests on architectural and specification-level analysis. The Jetson T4000 suits workloads requiring a self-contained, small-footprint compute node with moderate throughput. The Rubin GPU suits high-performance datacenter compute where maximum FP32 and tensor throughput justify a 2300 W power draw. Any organization selecting between these two is choosing between an embedded system-on-module and a rack-scale accelerator, not between two comparable graphics cards.

Where Each One Wins

The Jetson T4000 wins in power efficiency per watt in practical deployment terms. Its 90 W TDP requires only a 250 W suggested PSU, and it draws power through no external connectors, using the PCIe 5.0 x8 slot's onboard power delivery. The module measures 87 mm in length, 100 mm in height, and 15 mm in width, making it suitable for space-constrained chassis. The Rubin GPU, by contrast, demands a 2700 W suggested PSU and uses an SXM Module slot width, which is a rack-scale form factor with no board dimensions listed. The Jetson T4000 also wins on clock stability, with a base and boost clock both locked at 1530 MHz, meaning sustained performance without thermal throttling variance under nominal conditions.

The Rubin GPU wins decisively in raw compute. Its FP32 throughput of 130.0 TFLOPS is over 27 times the Jetson T4000's 4.700 TFLOPS. The Rubin GPU's FP16 output reaches 260.0 TFLOPS with a 2:1 ratio, while the Jetson T4000 delivers 4.700 TFLOPS FP16 at a 1:1 ratio. Memory bandwidth heavily favors the Rubin GPU, with 22.1 TB/s from HBM4 across a 16384-bit bus, versus 273.2 GB/s from LPDDR5X across a 256-bit bus. The Rubin GPU also has 288 GB of memory versus 64 GB, and its transistor count reaches 336,000 million on a 1456 mm² die, compared to the Jetson T4000's unknown transistor count on a 391 mm² die. The Rubin GPU wins on texture rate, 2,031.2 GTexel/s versus 73.44 GTexel/s, and on pixel rate, 54.41 GPixel/s versus 24.48 GPixel/s.

Architecture Differences

The Jetson T4000 uses the GB10B chip built on the Blackwell architecture, manufactured on a 5 nm process at TSMC. The Rubin GPU uses the GR100 chip on the Rubin architecture, manufactured on a 3 nm process at TSMC. The process node difference provides the Rubin GPU with a higher transistor density of 230.8M per mm², although the Jetson T4000's density is not recorded. The die size disparity is substantial, with the Rubin GPU at 1456 mm² versus the Jetson T4000 at 391 mm², and the Rubin GPU integrates 336,000 million transistors total.

The Jetson T4000 contains 1536 shading units, 48 texture mapping units, 16 raster output units, 12 ray tracing cores, and 64 tensor cores. The Rubin GPU contains 28672 shading units, 896 texture mapping units, 24 raster output units, no recorded ray tracing cores, and 896 tensor cores. The Rubin GPU's shading unit count is over 18 times higher, and its tensor core count is exactly 14 times higher. The Jetson T4000 has a PCIe 5.0 x8 bus interface, while the Rubin GPU uses PCIe 6.0 x16, doubling the lane count and advancing one generation. Both products have no display outputs, and both list DirectX, OpenGL, and Vulkan APIs as N/A, confirming they are compute-only accelerators.

Memory architecture differs fundamentally. The Jetson T4000 uses 64 GB of LPDDR5X with a 256-bit bus and 273.2 GB/s bandwidth. The Rubin GPU uses 288 GB of HBM4 with a 16384-bit bus and 22.1 TB/s bandwidth. The memory clock also differs, with the Jetson T4000 running at 1067 MHz (8.5 Gbps effective) and the Rubin GPU at 2695 MHz (10.8 Gbps effective). The Rubin GPU's memory bandwidth advantage is roughly 81 times higher, a gap that directly impacts memory-bound workloads.

The power architecture separates the two completely. The Jetson T4000 has a 90 W TDP, an integrated package (IGP), no power connectors, and a 250 W suggested PSU. The Rubin GPU has a 2300 W TDP, an SXM Module slot width, no listed power connectors, and a 2700 W suggested PSU. The Rubin GPU's power draw is over 25 times higher, reflecting its scale of compute resources.

FAQ

Q: Which product has the higher FP32 compute throughput?

A: The NVIDIA Rubin GPU delivers 130.0 TFLOPS FP32, which is over 27 times the Jetson T4000's 4.700 TFLOPS.

Q: How do the memory sizes compare?

A: The Jetson T4000 has 64 GB of LPDDR5X, while the Rubin GPU has 288 GB of HBM4, a 4.5 times capacity advantage for the Rubin GPU.

Q: What are the power requirements for each product?

A: The Jetson T4000 uses a 90 W TDP with a 250 W suggested PSU and no external power connectors. The Rubin GPU uses a 2300 W TDP with a 2700 W suggested PSU.

Q: Which architecture does each product use?

A: The Jetson T4000 uses the Blackwell architecture with the GB10B chip on a 5 nm TSMC process. The Rubin GPU uses the Rubin architecture with the GR100 chip on a 3 nm TSMC process.

Q: Are either of these products suitable for display output?

A: No. Both the Jetson T4000 and the Rubin GPU have no display outputs, and both list DirectX, OpenGL, and Vulkan as N/A, indicating compute-only operation.

Q: What is the bus interface difference?

A: The Jetson T4000 uses PCIe 5.0 x8, while the Rubin GPU uses PCIe 6.0 x16, providing the Rubin GPU with double the lane count and a newer bus generation.

Head-to-Head Benchmarks

The recorded head-to-head benchmark table is empty, with zero wins recorded for either product. This absence of measured benchmark data means the comparison must rely on the specification-level metrics recorded in the database. The most decisive separation appears in FP32 throughput, where the Rubin GPU's 130.0 TFLOPS dwarfs the Jetson T4000's 4.700 TFLOPS by a factor of approximately 27.7. In FP16 compute, the Rubin GPU's 260.0 TFLOPS with a 2:1 ratio represents a 55.3 times advantage over the Jetson T4000's 4.700 TFLOPS at 1:1 ratio. These ratios confirm the Rubin GPU is designed for throughput-intensive training and inference workloads, while the Jetson T4000 targets lighter edge inference tasks.

Memory bandwidth provides another major differentiator. The Rubin GPU's 22.1 TB/s from HBM4 is roughly 80.9 times the Jetson T4000's 273.2 GB/s from LPDDR5X. This bandwidth gap directly affects memory-bound operations such as large matrix multiplications and data streaming. The Rubin GPU's 16384-bit memory bus is 64 times wider than the Jetson T4000's 256-bit bus, and the memory clock runs at 2695 MHz versus 1067 MHz, a 2.5 times frequency advantage.

Texture throughput favors the Rubin GPU heavily, with 2,031.2 GTexel/s versus 73.44 GTexel/s, a 27.7 times difference. Pixel rate is less extreme but still substantial, with the Rubin GPU at 54.41 GPixel/s versus the Jetson T4000's 24.48 GPixel/s, a 2.2 times advantage. The Rubin GPU also leads in shading units, 28672 versus 1536, and in tensor cores, 896 versus 64. The Jetson T4000's only recorded advantages are its locked clock behavior at 1530 MHz base and boost, its compact dimensions, and its lower power draw, none of which translate to a benchmark win in the database. The production status for both is Active, with the Jetson T4000 releasing on 2026-01-04 and the Rubin GPU releasing on 2025-12-31, meaning the Rubin GPU entered the market five days earlier in the recorded dates.

Specification Differences

The two products differ across nearly every recorded specification field. The Jetson T4000 uses the GB10B chip, while the Rubin GPU uses the GR100 chip. Architecture differs, Blackwell versus Rubin. The process node differs, 5 nm versus 3 nm, both from TSMC. The die size differs, 391 mm² versus 1456 mm². Transistors are unknown for the Jetson T4000, while the Rubin GPU records 336,000 million transistors and a density of 230.8M per mm².

Clock behavior differs: the Jetson T4000 has base and boost both at 1530 MHz, while the Rubin GPU has a base of 700 MHz and a boost of 2267 MHz. Memory clocks differ, 1067 MHz (8.5 Gbps effective) versus 2695 MHz (10.8 Gbps effective). Memory size differs, 64 GB versus 288 GB. Memory type differs, LPDDR5X versus HBM4. Bus width differs, 256 bit versus 16384 bit. Bandwidth differs, 273.2 GB/s versus 22.1 TB/s.

Compute resources differ: shading units 1536 versus 28672, TMUs 48 versus 896, ROPs 16 versus 24, RT cores 12 versus not recorded, tensor cores 64 versus 896. Pixel rate differs, 24.48 GPixel/s versus 54.41 GPixel/s. Texture rate differs, 73.44 GTexel/s versus 2,031.2 GTexel/s. FP32 differs, 4.700 TFLOPS versus 130.0 TFLOPS. FP16 differs, 4.700 TFLOPS (1:1) versus 260.0 TFLOPS (2:1).

Power and form factor differ: TDP 90 W versus 2300 W, slot width IGP versus SXM Module, suggested PSU 250 W versus 2700 W. The Jetson T4000 records power connectors as None, while the Rubin GPU has no value recorded. Bus interface differs, PCIe 5.0 x8 versus PCIe 6.0 x16. Dimensions exist only for the Jetson T4000, at 87 mm length, 100 mm height, and 15 mm width; the Rubin GPU has no recorded dimensions. The Jetson T4000 has a launch MSRP of 1,999 USD, while the Rubin GPU has no launch MSRP recorded. The Jetson T4000 lists its predecessor as Server Hopper and successor as Server Rubin, while the Rubin GPU lists its predecessor as Server Blackwell and no successor. Both share the same generation naming pattern, Server Blackwell (Bxx) for the Jetson T4000 and Server Rubin (Rxx) for the Rubin GPU, and both have no display outputs and no supported graphics APIs.