Intel Arc Pro B65 vs NVIDIA Rubin GPU Comparison

Head-to-Head Benchmarks

The recorded data for the Intel Arc Pro B65 and the NVIDIA Rubin GPU places both at the 50th percentile among all GPUs in the database, with an average benchmark score of zero for each. No direct head-to-head benchmark results are available, so the comparison rests entirely on the architectural and specification measurements captured in the database.

The most decisive difference is raw compute throughput. The NVIDIA Rubin GPU delivers 130.0 TFLOPS of FP32 performance, while the Intel Arc Pro B65 delivers 12.29 TFLOPS. That puts the Rubin at roughly 10.6 times the FP32 throughput of the Arc Pro B65. The gap is similarly large in FP16: Rubin reaches 260.0 TFLOPS, versus 24.58 TFLOPS for Intel, a factor of about 10.6 as well. These are not marginal differences; the Rubin GPU is in a different performance tier entirely.

Texture throughput follows the same pattern. The Rubin GPU records 2,031.2 GTexel/s, while the Arc Pro B65 records 384.0 GTexel/s. This is a 5.3x advantage for NVIDIA. The pixel rate, however, tells a different story. The Intel Arc Pro B65 reaches 192.0 GPixel/s, while the Rubin GPU reaches only 54.41 GPixel/s. That means Intel holds a 3.5x advantage in pixel fill rate, despite its much lower overall compute. The reason is visible in the render output unit counts: Intel has 80 ROPs, and NVIDIA has just 24 ROPs. The Rubin GPU was not designed for rasterization-heavy workloads at high resolutions; its pixel pipeline is comparatively narrow.

Memory bandwidth reinforces the NVIDIA dominance. The Rubin GPU accesses 288 GB of HBM4 memory across a 16384-bit bus, producing 22.1 TB/s of bandwidth. The Arc Pro B65 uses 32 GB of GDDR6 across a 256-bit bus, yielding 608.0 GB/s. The bandwidth ratio is roughly 36.3x in favor of NVIDIA. This is the largest single specification gap in the entire comparison, and it reflects the fundamentally different memory architectures: a server-class accelerator with HBM4 versus a workstation-class graphics card with conventional GDDR6.

Clock speeds do not favor the larger chip. The Intel Arc Pro B65 runs at a fixed 2400 MHz for both base and boost, while the Rubin GPU has a 700 MHz base and a 2267 MHz boost. So the Intel part operates at a higher sustained frequency, but the Rubin GPU compensates with 28672 shading units versus 2560 for Intel. That is an 11.2x difference in shader count, which explains how NVIDIA achieves its massive FP32 lead despite a lower boost clock.

The transistor counts are equally lopsided. The Rubin GPU integrates 336,000 million transistors on a 1456 mm² die, while the Arc Pro B65 contains 19,600 million transistors on a 272 mm² die. That is a 17.1x difference in transistor count and a 5.4x difference in die area. The process nodes differ as well: NVIDIA uses a 3 nm TSMC process, and Intel uses a 5 nm TSMC process. The resulting transistor densities are 230.8M per mm² for Rubin and 72.1M per mm² for the Arc Pro B65.

The Verdict

The data positions these two products for completely different roles. The NVIDIA Rubin GPU is a server accelerator. It has no display outputs, uses an SXM module form factor, and is rated at 2300 W with a suggested PSU of 2700 W. The Intel Arc Pro B65 is a workstation graphics card with four DisplayPort 2.1 outputs, a dual-slot form factor, a 200 W TDP, and a suggested PSU of 550 W. One is meant to be installed in a rack and driven remotely; the other is meant to drive monitors directly.

For compute-bound workloads, the Rubin GPU is the clear choice based on the recorded measurements. Its FP32 throughput is 10.6x higher, its texture rate is 5.3x higher, and its memory bandwidth is 36.3x higher. The 288 GB of HBM4 memory dwarfs the 32 GB of GDDR6 on the Intel card, which matters for large models or datasets that exceed the 32 GB capacity. The Rubin GPU also has 896 tensor cores, while the Arc Pro B65 has no tensor core entry in the database. For any AI or machine learning workload that relies on tensor operations, the Rubin GPU is the only option between these two.

For rasterization-heavy tasks, the Intel Arc Pro B65 holds the advantage. Its pixel rate of 192.0 GPixel/s is 3.5x higher than the Rubin GPU's 54.41 GPixel/s. It also supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the Rubin GPU lists N/A for all three APIs. This means the Intel card can run conventional graphics applications and games, while the Rubin GPU has no graphics API support recorded at all. The Arc Pro B65 also has 20 ray tracing cores, a feature absent from the Rubin GPU's recorded data.

The power envelope is a practical differentiator. The Arc Pro B65 draws 200 W and uses a single 8-pin connector, while the Rubin GPU draws 2300 W and has no power connector listed because it is an SXM module designed for a chassis with its own power delivery. The suggested PSU figures reflect this: 550 W for Intel versus 2700 W for NVIDIA. These are not competing in the same installation environment.

Where Each One Wins

The Intel Arc Pro B65 wins in scenarios that require direct display output, conventional graphics APIs, moderate power draw, and rasterization throughput. Its 192.0 GPixel/s pixel rate is the highest among the two, and its 4x DisplayPort 2.1 outputs make it suitable for multi-monitor workstation setups. The 32 GB GDDR6 memory is substantial for a workstation card, and the 256-bit bus provides 608.0 GB/s, which is adequate for graphics rendering and moderate compute workloads. The 80 ROPs give it a strong fill rate for high-resolution rendering, and the 20 ray tracing cores enable hardware-accelerated ray tracing in supported titles. The fixed 2400 MHz clock means consistent performance without boost variance. The PCIe 5.0 x16 interface is current-generation, and the 200 W TDP allows installation in standard workstation towers with a 550 W PSU.

The NVIDIA Rubin GPU wins in every metric that scales with massive parallel compute and memory capacity. The 28672 shading units and 896 tensor cores are orders of magnitude beyond the Intel part. The 130.0 TFLOPS FP32 and 260.0 TFLOPS FP16 figures are the headline numbers, but the 22.1 TB/s memory bandwidth is the enabling factor for feeding those compute units. The 288 GB HBM4 capacity means the Rubin GPU can hold models or datasets that would never fit in 32 GB. The 896 texture mapping units deliver 2,031.2 GTexel/s, which is critical for texture-heavy compute workloads such as volumetric rendering or scientific simulation. The 16384-bit memory bus is the widest recorded in this comparison. The 3 nm TSMC process with 230.8M transistors per mm² gives it a density advantage that the 5 nm Intel process cannot match.

Neither part wins on pixel rate for NVIDIA, and neither part wins on raw compute for Intel. The split is clean: Intel for graphics output and rasterization, NVIDIA for compute density and memory capacity.

The release dates differ by three months. The NVIDIA Rubin GPU has a release date of 2025-12-31, and the Intel Arc Pro B65 has a release date of 2026-03-31. Both are marked as Active in production status. The Rubin GPU has a predecessor listed as Server Blackwell, while the Arc Pro B65 has no predecessor recorded. Neither has a successor listed.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA Rubin GPU records 130.0 TFLOPS FP32, which is approximately 10.6 times the 12.29 TFLOPS of the Intel Arc Pro B65.

Q: Which GPU has more memory and bandwidth?

A: The NVIDIA Rubin GPU has 288 GB of HBM4 memory with 22.1 TB/s bandwidth across a 16384-bit bus. The Intel Arc Pro B65 has 32 GB of GDDR6 with 608.0 GB/s bandwidth across a 256-bit bus.

Q: Can the NVIDIA Rubin GPU output video to displays?

A: No. The database lists no display outputs for the NVIDIA Rubin GPU. The Intel Arc Pro B65 has 4x DisplayPort 2.1 outputs.

Q: Which GPU supports conventional graphics APIs?

A: The Intel Arc Pro B65 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA Rubin GPU lists N/A for DirectX, OpenGL, and Vulkan.

Q: Which GPU has a higher pixel fill rate?

A: The Intel Arc Pro B65 records 192.0 GPixel/s, which is 3.5 times the 54.41 GPixel/s of the NVIDIA Rubin GPU. This is due to the Intel card's 80 ROPs versus 24 ROPs for NVIDIA.

Q: What are the power requirements for each GPU?

A: The Intel Arc Pro B65 has a 200 W TDP and a suggested PSU of 550 W, using a single 8-pin connector. The NVIDIA Rubin GPU has a 2300 W TDP and a suggested PSU of 2700 W, with an SXM module form factor and no power connector listed.

Architecture Differences

The two GPUs are built on different architectures from different vendors. The Intel Arc Pro B65 uses the Xe2-HPG architecture on the BMG-G21 chip, part of the Battlemage generation for the Pro Series. The NVIDIA Rubin GPU uses the Rubin architecture on the GR100 chip, part of the Server Rubin generation.

The process nodes differ. Intel uses a 5 nm TSMC process, while NVIDIA uses a 3 nm TSMC process. The transistor counts reflect this: 19,600 million for Intel and 336,000 million for NVIDIA. Die sizes are 272 mm² for Intel and 1456 mm² for NVIDIA. Transistor density is 72.1M per mm² for Intel and 230.8M per mm² for NVIDIA, indicating that the 3 nm process packs nearly three times more transistors per square millimeter.

The memory systems are fundamentally different. The Intel Arc Pro B65 uses 32 GB of GDDR6 with a 256-bit bus, operating at 2375 MHz with 19 Gbps effective speed. The NVIDIA Rubin GPU uses 288 GB of HBM4 with a 16384-bit bus, operating at 2695 MHz with 10.8 Gbps effective speed. The bandwidth difference is enormous: 608.0 GB/s versus 22.1 TB/s. The memory type alone separates these into different classes: GDDR6 is a standard graphics memory, while HBM4 is a high-bandwidth stacked memory used in accelerators.

The compute units differ in both count and type. The Intel Arc Pro B65 has 2560 shading units, 160 texture mapping units, 80 render output units, and 20 ray tracing cores. It has no tensor cores recorded. The NVIDIA Rubin GPU has 28672 shading units, 896 texture mapping units, 24 render output units, and 896 tensor cores. It has no ray tracing cores recorded. The absence of tensor cores on Intel and the absence of ray tracing cores on NVIDIA indicate different design priorities: Intel covers graphics features, NVIDIA covers matrix math.

The clock behavior differs as well. The Intel part runs at a flat 2400 MHz for both base and boost, which is a conservative, consistent clock. The NVIDIA part has a 700 MHz base clock and a 2267 MHz boost clock, a wide boost range that suggests aggressive power management. The memory clocks are 2375 MHz for Intel and 2695 MHz for NVIDIA, but the effective data rates are 19 Gbps and 10.8 Gbps respectively because of the different memory types.

The bus interfaces differ by one generation. The Intel Arc Pro B65 uses PCIe 5.0 x16, while the NVIDIA Rubin GPU uses PCIe 6.0 x16. The power delivery also differs: Intel uses a 1x 8-pin connector with a 200 W TDP, while NVIDIA uses an SXM module with no connector listed and a 2300 W TDP. The slot widths reflect this: dual-slot for Intel, SXM Module for NVIDIA.

The display capabilities are entirely one-sided. The Intel Arc Pro B65 has 4x DisplayPort 2.1 outputs. The NVIDIA Rubin GPU has no outputs. This confirms the server orientation of the Rubin GPU and the workstation orientation of the Arc Pro B65.

The API support also diverges sharply. The Intel card lists DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA card lists N/A for all three. This means the Rubin GPU cannot be used for conventional graphics rendering through these APIs, while the Intel card covers the full modern graphics stack.

The release timeline shows the NVIDIA Rubin GPU dated 2025-12-31 and the Intel Arc Pro B65 dated 2026-03-31. The NVIDIA part has a predecessor, Server Blackwell, while the Intel part has none recorded. Both are listed as Active in production status.