Intel Arc B580 vs Intel Arc G3 Comparison

Where Each One Wins

The Intel Arc B580 is the clear performance leader in this comparison, delivering substantially higher raw throughput across every measurable compute category. The B580 produces 13.67 TFLOPS of FP32 compute, more than double the 6.144 TFLOPS of the Arc G3. Its pixel rate reaches 213.6 GPixel/s versus 48.00 GPixel/s for the G3, and its texture rate of 427.2 GTexel/s dwarfs the G3's 96.00 GTexel/s. In every benchmark category where data exists, the B580 wins outright.

The Arc G3, however, is not designed to compete on raw performance. It is an integrated graphics processor (IGP) with a 25 W TDP, intended for portable devices where power consumption and physical footprint matter more than absolute speed. The G3 uses system shared memory, meaning its bandwidth is system dependent rather than fixed, and its display outputs depend on the host device. The B580, by contrast, is a dual-slot discrete card with 12 GB of dedicated GDDR6 memory on a 192-bit bus delivering 456.0 GB/s of bandwidth.

The use-case split is straightforward: the B580 serves desktop gaming and compute workloads requiring high sustained performance, while the G3 serves thin-and-light systems where a discrete card cannot physically fit. The B580 has 2560 shading units, 160 TMUs, 80 ROPs, and 20 RT cores. The G3 has 1280 shading units, 40 TMUs, 20 ROPs, and 10 RT cores. In every architectural resource count, the B580 has at least double the hardware of the G3.

The B580 also carries a dedicated 8-pin power connector and requires a 450 W suggested PSU, while the G3 needs no power connector at all. This makes the G3 suitable for systems with no expansion slots and minimal power budgets, whereas the B580 demands a full desktop platform with adequate power delivery and PCIe 4.0 x8 bandwidth.

The Verdict

Based on the recorded data, the Intel Arc B580 is the appropriate choice for any workload requiring maximum frame rates, high-resolution rendering, or compute acceleration. The B580 sits in the 68th percentile among all GPUs in the database, with an average benchmark score of 23021. Its nearest rivals bracket it closely: the AMD Radeon RX 580 2048SP scores 23061 (0.2% ahead), the NVIDIA GeForce RTX 3080 scores 23172 (0.7% ahead), the NVIDIA P106-100 scores 23249 (1% ahead), and the NVIDIA GeForce RTX 2080 scores 22895 (0.6% behind). The B580 is essentially performance-parity with these four cards, despite being a current-generation Battlemage part.

The Intel Arc G3, launching later with a 2026-05-31 release date, has no benchmark scores in the database and an average score of zero. It sits in the 50th percentile among all GPUs, which places it at the median of the performance distribution. The G3 is built on Intel's 3 nm process with the Xe3-LPG architecture, whereas the B580 uses TSMC's 5 nm process with Xe2-HPG. The G3's base clock of 300 MHz is unusually low, though its boost clock reaches 2400 MHz. The B580 runs at a flat 2670 MHz for both base and boost.

For users building a desktop system with room for a dual-slot card and a 450 W PSU, the B580 delivers discrete-class performance with 12 GB of VRAM. For users seeking integrated graphics in a portable device, the G3 provides 6.144 TFLOPS of FP32 performance within a 25 W power envelope, but it cannot match the B580 in any benchmark category. The data does not support choosing the G3 over the B580 for any performance-sensitive application.

Head-to-Head Benchmarks

The head-to-head benchmark table in the database is empty, meaning no direct comparison tests exist between the Intel Arc B580 and the Intel Arc G3. However, the individual benchmark suites for the B580 and the architectural specifications for both cards allow a quantitative comparison.

In 3DMark Steel Nomad DX12, the B580 scores 3068 points. The G3 has no recorded score in this test. In Geekbench OpenCL, the B580 scores 92821, and in Geekbench Vulkan it scores 109672. Again, the G3 has no recorded data. PassMark tests for the B580 show 76 in DirectX 10, 128 in DirectX 11, 76 in DirectX 12, 183 in DirectX 9, 709 in G2D, 15748 in G3D, and 7729 in GPU Compute.

The FP32 throughput comparison is the most direct: 13.67 TFLOPS versus 6.144 TFLOPS, meaning the B580 delivers 2.2 times the single-precision compute of the G3. FP16 performance follows the same ratio: 27.34 TFLOPS versus 12.29 TFLOPS, both with a 2:1 ratio relative to FP32. Pixel fill rate differs by a factor of 4.45 (213.6 GPixel/s versus 48.00 GPixel/s), and texture fill rate differs by a factor of 4.45 as well (427.2 GTexel/s versus 96.00 GTexel/s).

The B580's memory subsystem is a decisive advantage. It has 12 GB of GDDR6 running at 2375 MHz with 19 Gbps effective speed on a 192-bit bus, yielding 456.0 GB/s of bandwidth. The G3 uses system shared memory with system dependent bandwidth, which means its effective bandwidth will vary by platform and can never match a dedicated 456.0 GB/s link.

The B580's transistor count is 19,600 million on a 272 mm² die, giving a density of 72.1M per mm². The G3's transistor count and die size are listed as unknown in the database. The B580 uses TSMC's 5 nm process, while the G3 uses Intel's 3 nm process, which suggests the G3 may achieve higher density, but no numbers exist to confirm that.

FAQ

Q: How much faster is the Intel Arc B580 than the Intel Arc G3 in FP32 compute?

A: The B580 delivers 13.67 TFLOPS of FP32 performance, while the G3 delivers 6.144 TFLOPS. The B580 is approximately 2.2 times faster in this metric.

Q: Does the Intel Arc G3 have any benchmark scores in the database?

A: No. The database records zero benchmark scores for the Arc G3, and its average benchmark score is 0. The G3 sits in the 50th percentile among all GPUs, whereas the B580 sits in the 68th percentile.

Q: What memory configuration does each card use?

A: The B580 uses 12 GB of GDDR6 on a 192-bit bus with 456.0 GB/s bandwidth. The G3 uses system shared memory with system dependent bandwidth, meaning it relies on the host system's RAM.

Q: What are the power requirements for each card?

A: The B580 has a 190 W TDP and requires a 450 W suggested PSU with a single 8-pin power connector. The G3 has a 25 W TDP and requires no power connector, as it is an integrated graphics processor.

Q: Which process nodes do the two cards use?

A: The B580 uses TSMC's 5 nm process, while the G3 uses Intel's 3 nm process. The B580 has 19,600 million transistors on a 272 mm² die; the G3's transistor count and die size are unknown.

Q: What is the release timeline for each card?

A: The B580 was released on 2024-12-12 and has a launch MSRP of 249 USD. The G3 has a release date of 2026-05-31 and no recorded launch MSRP.

Architecture Differences

The Intel Arc B580 and Intel Arc G3 represent two distinct architectural generations from Intel. The B580 uses the Xe2-HPG architecture on the BMG-G21 chip, belonging to the Battlemage (Arc 5) generation. The G3 uses the Xe3-LPG architecture on the Panther Lake chip, belonging to the Arc Graphics-M (Panther Lake) generation.

The manufacturing processes differ fundamentally. The B580 is fabricated on TSMC's 5 nm node with 19,600 million transistors packed into a 272 mm² die, achieving a density of 72.1M transistors per mm². The G3 is fabricated on Intel's own 3 nm node, though its transistor count and die size are listed as unknown in the database. The B580's foundry is TSMC, while the G3's foundry is Intel.

Clock behavior differs significantly. The B580 runs at a constant 2670 MHz for both base and boost clocks, with memory clocked at 2375 MHz (19 Gbps effective). The G3 has a base clock of just 300 MHz and a boost clock of 2400 MHz, a much wider frequency range suggesting aggressive power management. The G3's memory clock is system shared, meaning it depends entirely on the host platform.

The compute resources differ by a factor of two across the board. The B580 has 2560 shading units, 160 TMUs, 80 ROPs, and 20 RT cores. The G3 has 1280 shading units, 40 TMUs, 20 ROPs, and 10 RT cores. Neither card has tensor cores listed in the database. The B580's pixel rate is 213.6 GPixel/s and its texture rate is 427.2 GTexel/s, while the G3 achieves 48.00 GPixel/s and 96.00 GTexel/s respectively.

Memory architecture is the most pronounced difference. The B580 is a discrete card with 12 GB of GDDR6 on a 192-bit bus providing 456.0 GB/s of dedicated bandwidth. The G3 is an integrated processor with no dedicated memory; its bus width, memory type, and bandwidth are all system dependent. This makes the B580's memory subsystem far more predictable and faster in absolute terms.

The physical formats diverge completely. The B580 is a dual-slot card measuring 272 mm in length, 115 mm in height, and 45 mm in width, with a PCIe 4.0 x8 bus interface and a single 8-pin power connector. The G3 is an IGP with no slot width, no power connectors, no dimensions recorded, and a bus interface listed simply as "IGP." The G3's display outputs are portable device dependent, while the B580 offers 1x HDMI 2.1a and 3x DisplayPort 2.1 outputs.

Both cards support the same API set: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The B580 has a 190 W TDP and requires a 450 W suggested PSU, while the G3 operates within a 25 W TDP with no PSU requirement. The B580 is listed as having the Alchemist architecture as its predecessor, while the G3 has no predecessor recorded. Both are marked as active production status in the database.