Intel Arc Pro B50 vs Intel Arc Pro B65 Comparison

The Verdict

The Intel Arc Pro B50 and Intel Arc Pro B65 share the same BMG-G21 chip and Xe2-HPG architecture, but they are configured for different workloads. The B50 is a low-power, compact professional GPU with a 70 W TDP, 16 GB of GDDR6 memory on a 128-bit bus, and 2048 shading units. The B65 doubles memory to 32 GB, expands the bus to 256-bit, increases shading units to 2560, and raises TDP to 200 W. The recorded data shows the B50 holds an average benchmark score of 2660, placing it at the 17th percentile among all GPUs. The B65 has no benchmark scores recorded in the database, so direct numerical comparison is impossible; however, its specifications indicate it should deliver substantially higher throughput across most workloads.

The B50 is the appropriate choice for systems with strict power and space limits. Its 70 W TDP requires no power connectors, and its 167 mm length fits compact chassis. The B65, in contrast, demands a 1x 8-pin connector and a 550 W suggested PSU, indicating it targets workstations with adequate cooling and power delivery. The B50's launch MSRP is 349 USD. The B65 has no recorded launch MSRP.

The B65 is positioned for memory-intensive professional tasks. Its 32 GB frame buffer and 608.0 GB/s bandwidth are more than double the B50's 16 GB and 224.0 GB/s. The B65 also has 80 ROPs versus 16 on the B50, a 5x difference that directly impacts fill-rate-bound scenarios. The B50 wins on efficiency and simplicity; the B65 wins on raw capability.

Architecture Differences

Both cards use the same BMG-G21 chip fabricated on TSMC's 5 nm process, with 19,600 million transistors on a 272 mm² die, yielding a transistor density of 72.1M per mm². The architecture is Xe2-HPG, part of the Battlemage (Pro Series) generation. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The B50 operates with a base clock of 1700 MHz and a boost clock of 2600 MHz. The B65 has a fixed clock of 2400 MHz for both base and boost. Despite the B50's higher boost clock, the B65 compensates with more execution resources. The B50 has 2048 shading units, 128 TMUs, and 16 ROPs. The B65 has 2560 shading units, 160 TMUs, and 80 ROPs. That is 25% more shading units, 25% more TMUs, and 5x more ROPs.

Ray tracing hardware scales similarly: the B50 has 16 RT cores, the B65 has 20. The B50's pixel rate is 41.60 GPixel/s, while the B65 reaches 192.0 GPixel/s. Texture rate is 332.8 GTexel/s on the B50 versus 384.0 GTexel/s on the B65. FP32 compute is 10.65 TFLOPS for the B50 and 12.29 TFLOPS for the B65. FP16 rates are 21.30 TFLOPS and 24.58 TFLOPS, respectively, both at a 2:1 ratio.

Memory configuration differs significantly. The B50 uses 16 GB GDDR6 on a 128-bit bus with 1750 MHz memory clock (14 Gbps effective), delivering 224.0 GB/s. The B65 uses 32 GB GDDR6 on a 256-bit bus with 2375 MHz memory clock (19 Gbps effective), delivering 608.0 GB/s. The B65's bandwidth is 2.7x higher, which matters for large datasets and high-resolution rendering.

The bus interface also differs: the B50 uses PCIe 5.0 x8, while the B65 uses PCIe 5.0 x16. Both provide four display outputs, but the B50 has mini-DisplayPort 2.1 connectors, and the B65 has full-size DisplayPort 2.1. Power delivery is another key split: the B50 has no power connectors and a 70 W TDP, while the B65 requires a single 8-pin connector and has a 200 W TDP. The suggested PSU is 250 W for the B50 and 550 W for the B65.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries between the B50 and B65. The B50 has eight recorded benchmark scores; the B65 has none. This absence of data means the comparison must rely on architectural specifications and the B50's rival positioning.

The B50's recorded benchmarks show a 3DMark Steel Nomad DX12 score of 1604. PassMark scores include DirectX 10 at 58, DirectX 11 at 100, DirectX 12 at 64, DirectX 9 at 144, G2D at 717, G3D at 12553, and GPU compute at 6037. The average benchmark score is 2660. The B50 sits at the 17th percentile of all GPUs.

The B50's nearest rivals in the database include the NVIDIA GeForce GT 1030 with an average score of 2662 and a delta of -0.1%, the NVIDIA Quadro K1100M at 2664 (-0.2%), the NVIDIA GeForce GT 440 at 2645 (+0.6%), and the NVIDIA GeForce RTX 5070 SUPER at 2690 (-1.1%). These deltas are all within 1.1% of the B50's average score, indicating the B50 clusters with these cards in overall average performance despite the RTX 5070 SUPER being a much higher-end product in other respects. This suggests the average score metric does not capture workload-specific strengths; the B50's 3DMark Steel Nomad score of 1604 and PassMark G3D score of 12553 indicate it is not a gaming-oriented part.

The B65, by contrast, has no recorded benchmark scores and no nearest rivals. Its specifications, however, point to a clear performance tier above the B50. The B65's 12.29 TFLOPS FP32 is 15.4% higher than the B50's 10.65 TFLOPS. Its 192.0 GPixel/s pixel rate is 4.6x higher. Its 608.0 GB/s bandwidth is 2.7x higher. The B65's 80 ROPs versus 16 ROPs is the largest architectural gap and directly affects anti-aliased rendering and high-resolution compositing.

FAQ

Q: Which card has more memory bandwidth?

A: The Intel Arc Pro B65 has 608.0 GB/s bandwidth from its 256-bit bus and 19 Gbps effective memory clock. The B50 has 224.0 GB/s from a 128-bit bus and 14 Gbps effective memory clock.

Q: Do both cards use the same chip?

A: Yes, both use the BMG-G21 chip on TSMC's 5 nm process with 19,600 million transistors and a 272 mm² die. They share the Xe2-HPG architecture from the Battlemage (Pro Series) generation.

Q: What is the power requirement difference?

A: The B50 has a 70 W TDP with no power connectors and a suggested PSU of 250 W. The B65 has a 200 W TDP, requires one 8-pin power connector, and has a suggested PSU of 550 W.

Q: Why does the B65 have no benchmark scores in the database?

A: The database records no benchmark entries for the B65. Its average benchmark score is listed as 0, and it has no nearest rivals. This means no measured performance data is currently available for the B65.

Q: How does the B50 compare to its nearest rivals?

A: The B50's average score of 2660 is within 1.1% of its nearest rivals: the NVIDIA GeForce GT 1030 (2662, -0.1%), NVIDIA Quadro K1100M (2664, -0.2%), NVIDIA GeForce GT 440 (2645, +0.6%), and NVIDIA GeForce RTX 5070 SUPER (2690, -1.1%).

Q: What are the display output differences?

A: The B50 has four mini-DisplayPort 2.1 outputs. The B65 has four full-size DisplayPort 2.1 outputs. Both support the same API set: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Where Each One Wins

The B50 wins in scenarios where power draw and physical footprint are the limiting factors. Its 70 W TDP requires no auxiliary power connectors, making it suitable for systems with a 250 W PSU. Its 167 mm length and 69 mm height fit smaller chassis. The B50 also has a higher boost clock at 2600 MHz versus the B65's fixed 2400 MHz, which can benefit lightly threaded or bursty workloads that do not saturate the execution units. The B50's launch MSRP of 349 USD provides a reference point for its market position.

The B65 wins in every compute-intensive category based on specifications. Its 2560 shading units and 160 TMUs deliver 25% more shader and texture throughput than the B50. The 80 ROPs provide a 5x fill-rate advantage, which is critical for multi-sample anti-aliasing, high-resolution compositing, and heavy pixel shading. The 32 GB memory capacity and 608.0 GB/s bandwidth enable working sets that exceed the B50's 16 GB and 224.0 GB/s, particularly relevant for large 3D scenes, high-res textures, or multi-display professional output.

The B65's PCIe 5.0 x16 interface doubles the bus width of the B50's x8 link, reducing transfer bottlenecks for data-heavy workloads. The B65 also has 20 RT cores versus 16 on the B50, so ray-traced rendering tasks will scale accordingly. The B65's 200 W TDP and 550 W PSU requirement indicate it is designed for dedicated workstation builds, not compact or low-power systems.

In the absence of B65 benchmark data, the architectural deltas provide the only quantitative basis for comparison. The B50's 17th percentile ranking among all GPUs places it in the lower performance tier; the B65's specifications suggest it would land significantly higher, though no percentile is recorded. For workloads that rely on raw fill rate, memory bandwidth, or frame buffer size, the B65 is the clear choice. For constrained environments where 70 W and no power connectors are mandatory, the B50 is the only viable option.