Intel Arc A350M vs Intel Arc B580 Comparison

The Intel Arc A350M and Intel Arc B580 represent two very different chapters in Intel’s discrete GPU strategy. The A350M is an end-of-life mobile part from the Alchemist generation, built for low-power laptops, while the B580 is an active, dual-slot desktop card from the Battlemage generation. The data shows a massive performance gulf between them, but the A350M still holds a niche for specific portable systems. This analysis relies strictly on the provided benchmark scores and specifications.

The Verdict

The Intel Arc B580 is the clear choice for any desktop builder seeking raw performance. In the two shared benchmark tests, the B580 utterly dominates the A350M. In Geekbench OpenCL, the B580 scores 92,821 against the A350M’s 24,546, a delta of -73.6% (meaning the A350M trails by that margin). In Geekbench Vulkan, the gap is even wider: 109,672 versus 24,747, with the A350M trailing by -77.4%. If you need a GPU for gaming, rendering, or compute-heavy tasks, the B580 is the only viable option here.

The Intel Arc A350M’s only advantage is its physical form factor and power envelope. At 25 W TDP and IGP slot width, it is designed for thin, portable devices. The B580, by contrast, is a dual-slot card requiring a 1x 8-pin power connector and a 450 W suggested PSU. If you are building a desktop, the A350M is not even a consideration due to its "Portable Device Dependent" display outputs, which make it unsuitable for standard monitors. The verdict is simple: the B580 for desktop performance, the A350M only for integrated-style mobile deployments where its low power draw is mandatory.

Architecture Differences

The two GPUs come from different architectural generations. The A350M uses the Xe-HPG architecture with the DG2-128 chip, belonging to the "Alchemist (Arc 3 Mobile)" generation. The B580 uses the newer Xe2-HPG architecture with the BMG-G21 chip, part of the "Battlemage (Arc 5)" generation. This architectural leap is reflected in the process node: the A350M is fabricated on a 6 nm process at TSMC, while the B580 uses a more advanced 5 nm process at the same foundry.

The transistor counts and die sizes tell a story of scale. The A350M has 7,200 million transistors on a 157 mm² die, yielding a transistor density of 45.9M per mm². The B580 packs 19,600 million transistors on a 272 mm² die, achieving a higher density of 72.1M per mm². This is not just a bigger chip; it is a denser one, indicating significant architectural improvements.

Feature-wise, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. However, the execution resources differ drastically. The A350M has 768 shading units, 48 TMUs, 24 ROPs, and 6 ray tracing cores. The B580 has 2,560 shading units, 160 TMUs, 80 ROPs, and 20 ray tracing cores. The B580 has more than three times the shading units and ray tracing cores, which explains its benchmark dominance. The memory subsystems are equally divergent, with the A350M using 4 GB of GDDR6 on a 64-bit bus and the B580 using 12 GB of GDDR6 on a 192-bit bus.

FAQ

Q: Which GPU has higher average benchmark scores?

A: The A350M has an average benchmark score of 24,647, while the B580 has 23,021. However, this average is skewed because the A350M only has two Geekbench results, while the B580 has ten results across multiple tests including Passmark. In the head-to-head Geekbench tests, the B580 wins decisively.

Q: Is the older A350M more power-efficient?

A: Yes, the A350M has a TDP of 25 W, making it suitable for IGP-style integration. The B580 has a TDP of 190 W and requires active cooling with a dual-slot design. The A350M’s low power draw is its primary advantage for mobile devices.

Q: Can the A350M be used in a desktop PC?

A: The A350M’s display outputs are "Portable Device Dependent," meaning it is not designed for standard desktop monitors. The B580 offers 1x HDMI 2.1a and 3x DisplayPort 2.1 outputs, making it a standard desktop card.

Q: Which GPU has more VRAM?

A: The B580 has 12 GB of GDDR6 memory, while the A350M has only 4 GB. The B580 also has a much wider 192-bit memory bus versus the A350M’s 64-bit bus, resulting in 456.0 GB/s bandwidth compared to 112.0 GB/s.

Q: How do their clock speeds compare?

A: The A350M has a base clock of 1150 MHz and a boost clock of 2200 MHz. The B580 has a fixed base and boost clock of 2670 MHz. The B580 runs at a consistently higher frequency.

Q: What is the production status of each GPU?

A: The A350M is end-of-life, released on 2022-03-29. The B580 is active, released on 2024-12-12, and lists its predecessor as "Alchemist." The B580 has a launch MSRP of 249 USD.

Specification Differences

The specification sheet shows a generational leap. The A350M uses the DG2-128 chip on a 6 nm process, while the B580 uses the BMG-G21 chip on a 5 nm process. Transistor count jumps from 7,200 million to 19,600 million, and die size grows from 157 mm² to 272 mm².

Clock speeds differ significantly. The A350M’s base clock is 1150 MHz with a boost of 2200 MHz. The B580’s base and boost are both 2670 MHz, meaning it runs at a constant higher frequency. Memory clocks also differ: the A350M runs at 1750 MHz (14 Gbps effective), while the B580 runs at 2375 MHz (19 Gbps effective).

The memory configuration is a major differentiator. The A350M has 4 GB GDDR6 on a 64-bit bus with 112.0 GB/s bandwidth. The B580 has 12 GB GDDR6 on a 192-bit bus with 456.0 GB/s bandwidth. The B580 has four times the memory and four times the bandwidth.

Compute resources are vastly different. The A350M has 768 shading units, 48 TMUs, 24 ROPs, and 6 RT cores. The B580 has 2,560 shading units, 160 TMUs, 80 ROPs, and 20 RT cores. Pixel rate jumps from 52.80 GPixel/s to 213.6 GPixel/s, and texture rate from 105.6 GTexel/s to 427.2 GTexel/s. FP32 performance goes from 3.379 TFLOPS to 13.67 TFLOPS.

Power and physical specs are polar opposites. The A350M is 25 W with IGP slot width and no power connectors. The B580 is 190 W with dual-slot width, a 1x 8-pin connector, and a 450 W suggested PSU. The B580 has dimensions of 272 mm length, 115 mm height, and 45 mm width. The A350M has no listed dimensions.

Head-to-Head Benchmarks

The head-to-head data is lopsided. Only two shared benchmarks exist: Geekbench OpenCL and Geekbench Vulkan. The B580 wins both.

In Geekbench OpenCL, the B580 scores 92,821 against the A350M’s 24,546. The delta is -73.6%, meaning the A350M’s score is less than a third of the B580’s. This is a massive margin that reflects the B580’s 2,560 shading units versus the A350M’s 768, combined with the B580’s higher clock speed.

In Geekbench Vulkan, the B580 scores 109,672 against the A350M’s 24,747. The delta is -77.4%, an even larger gap. The B580’s Vulkan score is over 4.4 times higher. This suggests the B580’s architecture handles Vulkan workloads particularly well. The A350M’s scores are remarkably consistent across both tests (24,546 and 24,747), while the B580 shows a 16,851-point improvement in Vulkan over OpenCL.

The B580’s nearest rivals in the average benchmark data include the NVIDIA GeForce RTX 2080 (avg score 22,895, delta 0.6%) and the NVIDIA GeForce RTX 3080 (avg score 23,172, delta -0.7%). This places the B580 in the same performance tier as those high-end desktop GPUs from previous generations. The A350M’s nearest rivals include the AMD Radeon RX 590 (avg score 24,744, delta -0.4%) and the NVIDIA GeForce GTX 1630 (avg score 24,277, delta 1.5%), placing it in the entry-level desktop segment despite being a mobile part.

Where Each One Wins

Intel Arc B580 wins on raw compute and gaming performance. In both shared benchmarks, it delivers scores that are 3.7 to 4.4 times higher than the A350M. Its 13.67 TFLOPS FP32 performance and 456.0 GB/s memory bandwidth make it suitable for demanding workloads like 3D rendering, video editing, and modern gaming at high settings. The B580’s 12 GB VRAM also gives it headroom for large textures and multi-tasking. Its 20 ray tracing cores provide hardware acceleration for ray-traced effects, a feature the A350M has in smaller numbers (6 cores) but lacks the overall horsepower to utilize effectively.

Intel Arc A350M wins on power efficiency and portability. At 25 W TDP, it draws less than 15% of the B580’s 190 W power budget. Its IGP slot width means it can be soldered onto motherboards in thin laptops, whereas the B580 requires a full dual-slot expansion card with a dedicated power connector. The A350M’s "Portable Device Dependent" display outputs are a feature for mobile devices, not a limitation in that context. For any application where power draw is the primary constraint — such as ultra-portable laptops or fanless designs — the A350M is the only logical choice. Its performance, while low by desktop standards, is still competitive with entry-level desktop GPUs like the AMD Radeon RX 590, which has an average score of 24,744 (delta -0.4% versus the A350M).

To summarize: The B580 is a desktop performer that competes with NVIDIA’s RTX 2080 and RTX 3080 in average scores. The A350M is a mobile solution that trades performance for a 25 W power envelope. Choose the B580 for any desktop build; choose the A350M only if you are designing a portable device where the 190 W TDP and dual-slot size of the B580 are physically impossible to accommodate.