NVIDIA N1X 48SM vs NVIDIA RTX PRO 4500 Blackwell Server Comparison

Head-to-Head Benchmarks

The recorded data contains no direct benchmark scores for either the NVIDIA N1X 48SM or the NVIDIA RTX PRO 4500 Blackwell Server. Both entries list empty benchmark arrays, zero wins in head-to-head comparisons, and identical percentile rankings at 50 against all GPUs. The average benchmark score for both is zero. Consequently, the analysis must rely entirely on the specification differences and architectural characteristics documented in the database.

The N1X 48SM delivers 28.83 TFLOPS of FP32 compute, while the RTX PRO 4500 delivers 50.70 TFLOPS, a difference of approximately 76% in favor of the server card. In pixel throughput, the RTX PRO 4500 achieves 270.5 GPixel/s versus 112.6 GPixel/s for the N1X, representing a 140% advantage. Texture rate tells a different story: the N1X reaches 900.9 GTexel/s, exceeding the RTX PRO 4500's 792.1 GTexel/s by roughly 14%. This inversion indicates distinct workload characteristics between the two designs.

Memory bandwidth heavily favors the RTX PRO 4500 at 800.3 GB/s compared to 273.2 GB/s for the N1X, a 193% gap. The RTX PRO 4500 also operates with substantially higher clock speeds, boosting to 2415 MHz versus 2346 MHz, and its base clock of 1215 MHz nearly doubles the N1X's 741 MHz. The N1X counters with 128 GB of memory, four times the 32 GB found on the RTX PRO 4500, though the LPDDR5X interface runs at 8.5 Gbps effective versus 25 Gbps effective for GDDR7.

FAQ

Q: Which GPU has higher raw compute throughput?

A: The RTX PRO 4500 Blackwell Server delivers 50.70 TFLOPS of FP32 performance, while the N1X 48SM provides 28.83 TFLOPS. The server card also matches this figure for FP16 at 50.70 TFLOPS, whereas the N1X offers 28.83 TFLOPS in FP16 with a 1:1 ratio.

Q: How do the memory subsystems compare?

A: The N1X 48SM uses 128 GB of LPDDR5X across a 256-bit bus, yielding 273.2 GB/s of bandwidth. The RTX PRO 4500 uses 32 GB of GDDR7 on the same 256-bit bus width but achieves 800.3 GB/s. The server card has roughly three times the bandwidth, while the N1X has four times the capacity.

Q: What are the shading unit counts for each card?

A: The RTX PRO 4500 contains 10,496 shading units, 328 texture mapping units, and 112 ROPs. The N1X 48SM has 6,144 shading units, 384 TMUs, and 48 ROPs. The N1X has 14.6% more texture units despite having 41.5% fewer shading units.

Q: Do both cards support the same APIs?

A: No. The RTX PRO 4500 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 48SM lists N/A for DirectX, OpenGL, and Vulkan, indicating it is not designed for conventional graphics API workloads.

Q: What are the physical differences between the two?

A: The RTX PRO 4500 is a single-slot card measuring 267 mm in length, 111 mm in height, and 40 mm in width, requiring one 16-pin power connector and a 450 W suggested PSU. The N1X is an integrated GPU (IGP) with no power connectors and no listed dimensions.

Q: Which card has a higher transistor density?

A: The RTX PRO 4500 uses a GB203 chip with 45,600 million transistors on a 378 mm² die, giving a density of 120.6 million transistors per mm². The N1X uses a GB20B chip with unknown transistor count on a 382 mm² die, so density cannot be calculated from the database.

The Verdict

The data supports a clear split based on workload type. The RTX PRO 4500 Blackwell Server is the choice for compute-intensive tasks that benefit from higher FP32 throughput, greater memory bandwidth, and full graphics API support. Its 50.70 TFLOPS, 800.3 GB/s bandwidth, and DirectX 12 Ultimate compatibility position it for rendering, simulation, and server-side graphics workloads.

The N1X 48SM presents a different profile. Its 128 GB memory capacity, 900.9 GTexel/s texture rate, and 384 TMUs suggest a design optimized for texture-heavy operations and large dataset residency. However, the absence of graphics API support and lower compute throughput indicate its strengths lie outside conventional GPU-accelerated rendering.

Users requiring maximum memory capacity for large models or datasets should consider the N1X. Users needing high bandwidth, faster clocks, and API compatibility should select the RTX PRO 4500. The RTX PRO 4500 also offers a defined power envelope at 165 W TDP with a 450 W suggested PSU, while the N1X has no documented power requirements.

Specification Differences

The two GPUs diverge across nearly every recorded specification. Clock speeds show the RTX PRO 4500 at 1215 MHz base and 2415 MHz boost, versus 741 MHz base and 2346 MHz boost for the N1X. Memory type differs fundamentally: LPDDR5X on the N1X versus GDDR7 on the RTX PRO 4500. Bandwidth ranges from 273.2 GB/s to 800.3 GB/s, while capacity reverses with 128 GB versus 32 GB.

Shader resources: the RTX PRO 4500 has 10,496 shading units, 328 TMUs, and 112 ROPs. The N1X has 6,144 shading units, 384 TMUs, and 48 ROPs. Ray tracing cores number 82 on the server card versus 48 on the N1X. Tensor cores: 328 versus 192. Pixel rate reaches 270.5 GPixel/s on the RTX PRO 4500, while texture rate peaks at 900.9 GTexel/s on the N1X.

Form factor and power: the RTX PRO 4500 is single-slot with a 16-pin connector and 165 W TDP, while the N1X is an IGP with no connectors and unknown TDP. Display outputs: the N1X has one HDMI port, the RTX PRO 4500 has none. API support: the server card lists DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4; the N1X lists N/A for all three. Release dates differ by roughly two and a half months, with the RTX PRO 4500 dated earlier.

Architecture Differences

Both GPUs share the Blackwell 2.0 architecture and 5 nm TSMC process, but their implementations diverge significantly. The N1X uses the GB20B chip with a 382 mm² die size and unknown transistor count. The RTX PRO 4500 uses the GB203 chip with 45,600 million transistors on a 378 mm² die, resulting in a transistor density of 120.6 million per mm². The N1X belongs to the Blackwell IGP (N1x) generation, while the RTX PRO 4500 belongs to the Server Blackwell (Bxx) generation.

The N1X carries 192 tensor cores and 48 RT cores, while the RTX PRO 4500 carries 328 tensor cores and 82 RT cores. Both use a 256-bit memory bus, but the memory technology differs entirely: LPDDR5X at 8.5 Gbps effective for the N1X, GDDR7 at 25 Gbps effective for the RTX PRO 4500. The RTX PRO 4500 has a documented predecessor (Server Hopper) and successor (Server Rubin), while the N1X lists neither. The server card supports a full graphics API stack, whereas the N1X shows no API support, reinforcing its integrated, non-discrete positioning.

Where Each One Wins

The RTX PRO 4500 wins in FP32 and FP16 compute, delivering 50.70 TFLOPS versus 28.83 TFLOPS. It wins in memory bandwidth by a factor of nearly three, at 800.3 GB/s versus 273.2 GB/s. Pixel throughput favors the server card at 270.5 GPixel/s. Ray tracing and tensor operations also favor the RTX PRO 4500 with 82 RT cores and 328 tensor cores. Clock speeds, both base and boost, are higher on the server card. Graphics API support belongs exclusively to the RTX PRO 4500, making it the only option for DirectX, OpenGL, or Vulkan workloads.

The N1X wins in memory capacity with 128 GB, four times the RTX PRO 4500's 32 GB. Texture throughput favors the N1X at 900.9 GTexel/s, driven by its 384 TMUs. The N1X also has a display output via HDMI, while the RTX PRO 4500 provides none. The N1X uses no external power connectors, which may simplify deployment in constrained environments, though its TDP remains unknown.

The database shows no benchmark results, so these conclusions derive entirely from specification analysis. The RTX PRO 4500 targets compute-heavy, graphics-enabled server workloads. The N1X targets applications requiring large memory pools and high texture throughput without discrete graphics API demands.