NVIDIA Jetson T4000 vs NVIDIA N1X 48SM Comparison

FAQ

Q: What are the core architectural differences between the NVIDIA Jetson T4000 and the NVIDIA N1X 48SM?

A: The Jetson T4000 uses the GB10B chip based on the Blackwell architecture, while the N1X 48SM uses the GB20B chip based on the newer Blackwell 2.0 architecture. The N1X 48SM has 6144 shading units, 384 TMUs, 48 ROPs, 48 RT cores, and 192 tensor cores, while the Jetson T4000 has 1536 shading units, 48 TMUs, 16 ROPs, 12 RT cores, and 64 tensor cores.

Q: How do their memory configurations compare?

A: The Jetson T4000 comes with 64 GB of LPDDR5X memory, while the N1X 48SM doubles that with 128 GB of LPDDR5X. Both use a 256-bit bus and offer identical memory bandwidth of 273.2 GB/s, with the same memory clock of 1067 MHz (8.5 Gbps effective).

Q: What are the clock speed differences between the two?

A: The Jetson T4000 has a base clock of 1530 MHz and a boost clock of 1530 MHz, meaning it runs at a fixed frequency. The N1X 48SM has a much lower base clock of 741 MHz but a significantly higher boost clock of 2346 MHz.

Q: Which GPU delivers higher raw compute performance?

A: The N1X 48SM delivers 28.83 TFLOPS in both FP32 and FP16 (1:1), while the Jetson T4000 delivers 4.700 TFLOPS in both FP32 and FP16 (1:1). The N1X 48SM also achieves a pixel rate of 112.6 GPixel/s and a texture rate of 900.9 GTexel/s, compared to the Jetson T4000's 24.48 GPixel/s and 73.44 GTexel/s.

Q: What are the physical and interface differences?

A: The Jetson T4000 is a compact IGP measuring 87 mm in length, 100 mm in height, and 15 mm in width, with a PCIe 5.0 x8 interface. The N1X 48SM is also an IGP but uses a wider PCIe 5.0 x16 interface and includes 1x HDMI display output, while the Jetson T4000 has no display outputs. The N1X 48SM has no recorded dimensions.

Q: What is the power requirement for the Jetson T4000?

A: The Jetson T4000 has a TDP of 90 W and a suggested PSU rating of 250 W. The N1X 48SM has an unknown TDP and no suggested PSU rating listed.

Architecture Differences

The two GPUs share a common foundation: both are built by NVIDIA at TSMC on a 5 nm process node. That is where the similarity largely ends. The Jetson T4000 is based on the GB10B chip and belongs to the Server Blackwell (Bxx) generation, with its predecessor listed as Server Hopper and its successor as Server Rubin. The N1X 48SM uses the GB20B chip from the Blackwell 2.0 architecture and sits in the Blackwell IGP (N1x) generation, with no predecessor or successor recorded.

The die sizes are close: the Jetson T4000 measures 391 mm², while the N1X 48SM is slightly smaller at 382 mm². Transistor counts are unknown for both, as is transistor density. The most dramatic divergence is in execution resources. The N1X 48SM quadruples the shading units (6144 versus 1536), multiplies TMUs by eight (384 versus 48), and triples ROPs (48 versus 16). RT cores jump from 12 to 48, and tensor cores scale from 64 to 192.

Clock behavior differs significantly. The Jetson T4000 runs at a flat 1530 MHz for both base and boost, suggesting a conservative, steady-state design. The N1X 48SM has a low base clock of 741 MHz but a high boost clock of 2346 MHz, indicating a power-management strategy that ramps up aggressively under load. Memory clocks are identical at 1067 MHz with 8.5 Gbps effective.

The memory subsystems share the same type (LPDDR5X), bus width (256-bit), and bandwidth (273.2 GB/s), but capacity differs: 64 GB on the Jetson T4000 versus 128 GB on the N1X 48SM. Both are IGP (integrated graphics processor) form factors with no power connectors, but the bus interface differs: PCIe 5.0 x8 for the Jetson T4000 versus PCIe 5.0 x16 for the N1X 48SM. The N1X 48SM also adds a single HDMI output, while the Jetson T4000 has no display outputs at all.

Head-to-Head Benchmarks

The recorded benchmark data contains no individual benchmark scores, and the head-to-head benchmark list is empty. However, the specification sheets provide enough compute metrics to establish a clear performance hierarchy. The N1X 48SM delivers 28.83 TFLOPS in FP32, which is approximately 6.1 times the Jetson T4000's 4.700 TFLOPS. The FP16 figures mirror this exactly, with the N1X 48SM again at 28.83 TFLOPS versus 4.700 TFLOPS, both operating at a 1:1 ratio.

Texture throughput tells a similar story. The N1X 48SM achieves 900.9 GTexel/s, while the Jetson T4000 manages 73.44 GTexel/s. This is a 12-fold difference, driven by the N1X 48SM's eight-fold advantage in TMUs combined with its higher boost clock. Pixel rate also favors the N1X 48SM at 112.6 GPixel/s versus 24.48 GPixel/s, a 4.6-fold advantage that reflects the triple ROP count and the faster boost clock.

The boost clock gap is notable: 2346 MHz versus 1530 MHz. The N1X 48SM's boost clock is 53% higher than the Jetson T4000's fixed clock. Yet the base clock tells the opposite story: 741 MHz on the N1X 48SM versus 1530 MHz on the Jetson T4000. This suggests the Jetson T4000 is designed for predictable, sustained workloads at a moderate clock, while the N1X 48SM is built to burst to much higher frequencies when thermal and power headroom allow.

Both GPUs hold the same percentile rank of 50 against all GPUs in the database, and both have an average benchmark score of 0, which reflects the absence of recorded benchmark runs rather than actual performance parity. The wins count is 0 for each side, as no head-to-head benchmark entries exist.

Specification Differences

The following fields differ between the two GPUs:

• Chip: GB10B (Jetson T4000) versus GB20B (N1X 48SM)
• Architecture: Blackwell versus Blackwell 2.0
• Generation: Server Blackwell (Bxx) versus Blackwell IGP (N1x)
• Die Size: 391 mm² versus 382 mm²
• Base Clock: 1530 MHz versus 741 MHz
• Boost Clock: 1530 MHz versus 2346 MHz
• Memory Size: 64 GB versus 128 GB
• Shading Units: 1536 versus 6144
• TMUs: 48 versus 384
• ROPs: 16 versus 48
• RT Cores: 12 versus 48
• Tensor Cores: 64 versus 192
• Pixel Rate: 24.48 GPixel/s versus 112.6 GPixel/s
• Texture Rate: 73.44 GTexel/s versus 900.9 GTexel/s
• FP32: 4.700 TFLOPS versus 28.83 TFLOPS
• FP16: 4.700 TFLOPS versus 28.83 TFLOPS
• TDP: 90 W versus unknown
• Suggested PSU: 250 W versus null
• Bus Interface: PCIe 5.0 x8 versus PCIe 5.0 x16
• Display Outputs: No outputs versus 1x HDMI
• Dimensions: 87 mm x 100 mm x 15 mm versus null
• Release Date: 2026-01-04 versus 2026-05-31
• Launch MSRP: 1,999 USD versus null
• Predecessor: Server Hopper versus null
• Successor: Server Rubin versus null

Fields that are identical include the manufacturer (NVIDIA), process node (5 nm), foundry (TSMC), memory type (LPDDR5X), memory bus width (256-bit), memory bandwidth (273.2 GB/s), memory clock (1067 MHz 8.5 Gbps effective), slot width (IGP), power connectors (None), API support (all N/A), and production status (Active).

The Verdict

The data points to a clear compute hierarchy. The N1X 48SM dominates in every raw throughput metric: FP32, FP16, pixel rate, and texture rate. Its 6144 shading units, 384 TMUs, and 48 ROPs provide a structural advantage that no clock difference can offset. The Jetson T4000's flat 1530 MHz clock is respectable for a 90 W part, but the N1X 48SM's 2346 MHz boost clock, combined with quadruple the shading units and eight times the TMUs, creates a compute gap of roughly 6.1 times in FP32 and 12.3 times in texture rate.

The Jetson T4000 does hold some advantages. It has a defined power envelope (90 W TDP) with a suggested PSU of 250 W, while the N1X 48SM's power draw is unrecorded. The Jetson T4000 also has a smaller physical footprint with recorded dimensions, and it carries a launch MSRP of 1,999 USD, whereas the N1X 48SM has no listed price. For systems where power consumption and physical size are constrained, the Jetson T4000 offers a predictable, compact solution. For workloads that demand maximum compute throughput, the N1X 48SM is the only choice.

The memory capacity difference is also meaningful. The N1X 48SM's 128 GB allows it to hold larger datasets in local memory compared to the Jetson T4000's 64 GB, which can reduce data movement in memory-bound workloads. Both share the same bandwidth, so the extra capacity does not speed up transfers but does expand the working set size.

Where Each One Wins

NVIDIA Jetson T4000: This GPU wins in scenarios where power draw is a hard constraint. Its 90 W TDP and 250 W suggested PSU make it suitable for compact, low-power systems. The fixed 1530 MHz clock provides predictable performance without boost variability, which can be beneficial for real-time or latency-sensitive tasks. Its smaller die (391 mm² versus 382 mm² is actually larger, but the physical dimensions of 87 mm x 100 mm x 15 mm are recorded, while the N1X 48SM has no dimensions) and IGP form factor with no power connectors simplify integration. The launch MSRP of 1,999 USD gives it a defined cost point, though pricing comparisons are not part of this analysis. It also has a defined release date of 2026-01-04, earlier than the N1X 48SM's 2026-05-31.

NVIDIA N1X 48SM: This GPU wins decisively in raw compute. The 28.83 TFLOPS FP32 and FP16 throughput, 900.9 GTexel/s texture rate, and 112.6 GPixel/s pixel rate place it far ahead. The 128 GB memory capacity doubles the Jetson T4000's 64 GB, supporting larger models and datasets. The 48 RT cores and 192 tensor cores provide substantial acceleration for ray tracing and AI inference workloads. The PCIe 5.0 x16 interface offers double the lane width of the Jetson T4000's x8, which can improve host communication. The single HDMI output enables direct display connectivity, which the Jetson T4000 lacks entirely. The high boost clock of 2346 MHz indicates strong burst performance, though the low 741 MHz base clock suggests the need for adequate cooling to sustain high clocks.