Intel Arc Pro B65 vs NVIDIA GeForce RTX 4080 Mobile Comparison

The Verdict

The database places the NVIDIA GeForce RTX 4080 Mobile firmly ahead of the Intel Arc Pro B65 in overall benchmark standing. The RTX 4080 Mobile holds an 81st percentile rank across all GPUs, while the Arc Pro B65 sits at the 50th percentile. This difference is substantial and indicates that for most compute and graphics workloads, the NVIDIA part is the stronger choice.

The RTX 4080 Mobile also has a significant advantage in raw compute metrics. Its FP32 throughput of 24.72 TFLOPS doubles the Arc Pro B65's 12.29 TFLOPS. The NVIDIA card also carries more shading units, with 7424 versus 2560 for the Intel part. These figures point to a clear performance tier separation.

The Intel Arc Pro B65, however, is not without its own merits. It offers a massive 32 GB of GDDR6 memory on a 256-bit bus, delivering 608.0 GB/s of bandwidth. This is a workstation-oriented feature set. The RTX 4080 Mobile, by contrast, has 12 GB on a 192-bit bus with 432.0 GB/s. For memory-bound professional tasks, the Intel card's capacity advantage is a decisive factor.

The choice comes down to use case. The RTX 4080 Mobile is the pick for raw compute and gaming performance. The Arc Pro B65 is the pick for memory-hungry workstation loads that require more than 12 GB of frame buffer. The data does not support a single universal winner.

Where Each One Wins

The RTX 4080 Mobile wins on every recorded benchmark metric that involves compute or graphics rendering. Its Geekbench OpenCL score of 159575 versus the Arc Pro B65's lack of recorded scores in the database means the NVIDIA card is the only one with verified compute performance data. The PassMark G3D score of 24926 for the RTX 4080 Mobile further confirms its dominance in standard 3D workloads.

The Intel Arc Pro B65 wins on memory capacity and bandwidth. With 32 GB versus 12 GB, it handles datasets that would overflow the NVIDIA card's frame buffer. Its 608.0 GB/s bandwidth also exceeds the RTX 4080 Mobile's 432.0 GB/s. This is a clear win for large texture sets, high-resolution rendering, and AI inference workloads that require large model weights in VRAM.

The RTX 4080 Mobile also wins on transistor count and density. It packs 35,800 million transistors into a 294 mm² die, yielding 121.8M transistors per mm². The Intel card has 19,600 million transistors on a 272 mm² die, for a density of 72.1M per mm². This architectural advantage translates into the NVIDIA card's higher compute throughput.

The Arc Pro B65 wins on power connector requirements. It uses a single 8-pin connector, while the RTX 4080 Mobile is an IGP with no power connectors, as it is designed for laptop integration. This is a form factor distinction, not a performance one.

Architecture Differences

The two GPUs use completely different architectures from different vendors. The Intel Arc Pro B65 is built on Xe2-HPG, specifically the Battlemage generation for the Pro Series. Its chip is designated BMG-G21. The NVIDIA GeForce RTX 4080 Mobile uses Ada Lovelace, with the AD104 chip, part of the GeForce 40 Mobile generation.

Both are manufactured on a 5 nm process at TSMC. The Intel card has a base and boost clock of 2400 MHz, flat across both. The NVIDIA card has a base clock of 1290 MHz and a boost of 1665 MHz. Despite the lower clocks, the NVIDIA card achieves higher throughput due to its wider architecture.

Memory differs significantly. The Intel card uses 32 GB of GDDR6 with a 256-bit bus and 608.0 GB/s bandwidth. The NVIDIA card uses 12 GB of GDDR6 with a 192-bit bus and 432.0 GB/s. The Intel card also has a higher memory clock at 2375 MHz, versus 2250 MHz for the NVIDIA part.

The RTX 4080 Mobile includes 58 RT cores and 232 tensor cores, while the Arc Pro B65 has 20 RT cores and no listed tensor cores. This gives NVIDIA a major advantage in ray tracing and AI-accelerated workloads. The Intel card has 160 TMUs and 80 ROPs, while NVIDIA has 232 TMUs and 80 ROPs.

Bus interface differs as well. The Intel card uses PCIe 5.0 x16, while the NVIDIA card uses PCIe 4.0 x16. The Intel card also has four DisplayPort 2.1 outputs, while the NVIDIA card's outputs are listed as portable device dependent, reflecting its mobile nature.

FAQ

Q: Which GPU has more memory?

A: The Intel Arc Pro B65 has 32 GB of GDDR6, while the NVIDIA GeForce RTX 4080 Mobile has 12 GB of GDDR6.

Q: Which GPU has higher FP32 compute throughput?

A: The RTX 4080 Mobile delivers 24.72 TFLOPS, exactly double the Arc Pro B65's 12.29 TFLOPS.

Q: Which GPU has a higher memory bandwidth?

A: The Intel Arc Pro B65 has 608.0 GB/s, exceeding the RTX 4080 Mobile's 432.0 GB/s.

Q: Which GPU has a higher percentile rank?

A: The RTX 4080 Mobile is at the 81st percentile, while the Arc Pro B65 is at the 50th percentile.

Q: Which GPU has more RT cores?

A: The RTX 4080 Mobile has 58 RT cores, versus 20 for the Arc Pro B65.

Q: Which GPU has a faster boost clock?

A: The Intel Arc Pro B65 has a boost clock of 2400 MHz, while the RTX 4080 Mobile has a boost clock of 1665 MHz.

Head-to-Head Benchmarks

The database does not include head-to-head benchmark results between these two specific GPUs. However, the RTX 4080 Mobile has a full set of recorded scores. Its Geekbench OpenCL score is 159575, and its Geekbench Vulkan score is 145807. The PassMark suite shows a G3D score of 24926 and a GPU compute score of 11191.

The Arc Pro B65 has no recorded benchmark scores in the database. This absence means its actual performance cannot be directly compared using measured results. The RTX 4080 Mobile's average benchmark score is 38135, calculated from its recorded tests.

The nearest rivals to the RTX 4080 Mobile provide context for its standing. The NVIDIA GeForce MX570 scores 38299, which is 0.4% higher. The GeForce RTX 5080 Mobile scores 38349, 0.6% higher. The GeForce RTX 4070 scores 37648, or 1.3% lower. The Tesla P4 scores 37628, also 1.3% lower. These deltas show the RTX 4080 Mobile sits in a tight cluster near the top of this comparison group.

Since the Arc Pro B65 lacks scores, the only verifiable performance data in this comparison comes from the NVIDIA side. The RTX 4080 Mobile's compute scores are substantial, but the Intel card's memory capacity suggests it could win in memory-bound scenarios that these benchmarks may not capture.

Specification Differences

The two GPUs differ across nearly every specification category. The Intel Arc Pro B65 uses the BMG-G21 chip, while the NVIDIA GeForce RTX 4080 Mobile uses the AD104 chip. The Intel card has 19,600 million transistors on a 272 mm² die, while the NVIDIA card has 35,800 million transistors on a 294 mm² die.

Clock speeds differ substantially. The Intel card runs at 2400 MHz base and boost. The NVIDIA card runs at 1290 MHz base and 1665 MHz boost. The Intel card's memory clock is 2375 MHz, versus 2250 MHz for the NVIDIA card.

Memory configuration is a major differentiator. The Intel card has 32 GB, 256-bit bus, and 608.0 GB/s. The NVIDIA card has 12 GB, 192-bit bus, and 432.0 GB/s. Both use GDDR6.

Compute resources differ. The Intel card has 2560 shading units, 160 TMUs, 80 ROPs, and 20 RT cores. The NVIDIA card has 7424 shading units, 232 TMUs, 80 ROPs, 58 RT cores, and 232 tensor cores. The Intel card has no tensor cores listed.

Rates differ as well. The Intel card has a pixel rate of 192.0 GPixel/s and a texture rate of 384.0 GTexel/s. The NVIDIA card has a pixel rate of 133.2 GPixel/s and a texture rate of 386.3 GTexel/s. FP32 and FP16 both differ, with the Intel card at 12.29 TFLOPS FP32 and 24.58 TFLOPS FP16 (2:1), while the NVIDIA card is at 24.72 TFLOPS for both FP32 and FP16 (1:1).

Power and form factor differ. The Intel card has a TDP of 200 W, is dual-slot, uses a single 8-pin connector, and requires a 550 W PSU. The NVIDIA card has a TDP of 110 W, is an IGP, has no power connectors, and has no suggested PSU.

Bus and display outputs differ. The Intel card uses PCIe 5.0 x16 and has four DisplayPort 2.1 outputs. The NVIDIA card uses PCIe 4.0 x16 and has portable-device-dependent outputs.

Release dates differ. The Intel card was released on 2026-03-31, while the NVIDIA card was released on 2023-01-02. The NVIDIA card has a predecessor in the GeForce 30 Mobile and a successor in the GeForce 50 Mobile. The Intel card has no listed predecessor or successor. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.