Intel Arc B580 vs NVIDIA GeForce RTX 4050 Mobile Comparison

Where Each One Wins

The benchmark record splits cleanly along workload type. The Intel Arc B580 takes six of nine head-to-head tests, while the NVIDIA GeForce RTX 4050 Mobile wins three. The Arc B580 dominates in compute-heavy and modern API workloads. Its largest margins come in Vulkan (45.8% ahead), GPU compute (30% ahead), and DirectX 12 (24.6% ahead). These are the tests that stress raw throughput, memory bandwidth, and asynchronous compute. The RTX 4050 Mobile, by contrast, wins in legacy DirectX 9, DirectX 10, and DirectX 11, but by very slim margins: 0.5%, 3.8%, and 1.5% respectively. Those are essentially rounding errors in real-world terms.

The use-case split is clear. If the workload targets older APIs or legacy engine paths, the NVIDIA part holds a narrow edge. If the workload is modern, compute-heavy, or forward-looking, the Intel part dominates. The Arc B580 also wins the PassMark G3D aggregate at 9.2% ahead, which accounts for overall 3D raster performance. The RTX 4050 Mobile wins only in the legacy DirectX sub-tests, where the margin is small enough to be considered a statistical tie.

Architecture Differences

The two GPUs share a 5 nm TSMC process, but the designs diverge sharply after that. The Intel Arc B580 uses the BMG-G21 chip, part of the Xe2-HPG architecture, built for the Battlemage generation. It contains 19,600 million transistors on a 272 mm² die, giving a transistor density of 72.1M per mm². The NVIDIA GeForce RTX 4050 Mobile uses the AD107 chip with Ada Lovelace architecture, containing 18,900 million transistors on a much smaller 159 mm² die, yielding a density of 118.9M per mm². The NVIDIA die is 41.5% smaller, yet packs nearly the same transistor count, indicating a denser design.

Memory is a major differentiator. The Arc B580 has 12 GB GDDR6 on a 192-bit bus, delivering 456.0 GB/s of bandwidth. The RTX 4050 Mobile has 6 GB GDDR6 on a 96-bit bus, delivering 192.0 GB/s. That is a 2x bus width advantage and a 2.375x bandwidth advantage for Intel. The B580 also clocks memory at 2375 MHz (19 Gbps effective), while the 4050 runs at 2000 MHz (16 Gbps effective). For frame buffering and texture streaming, the Intel part has a clear capacity and bandwidth lead.

The compute cores show a similar pattern. Both have 2560 shading units, but the Intel chip has 160 TMUs and 80 ROPs, versus 80 TMUs and 48 ROPs for NVIDIA. That gives the B580 exactly 2x the texture units and 1.667x the ROP count. The pixel rate is 213.6 GPixel/s versus 84.24 GPixel/s, and the texture rate is 427.2 GTexel/s versus 140.4 GTexel/s. The Tensor core count differs: the RTX 4050 has 80 tensor cores, while the B580 does not report a tensor core count. Ray tracing cores are equal at 20 each.

FP32 performance is 13.67 TFLOPS for the B580 versus 8.986 TFLOPS for the RTX 4050 Mobile. FP16 performance is 27.34 TFLOPS (2:1 ratio) for Intel versus 8.986 TFLOPS (1:1) for NVIDIA. The Intel part offers 1.52x the FP32 and 3.04x the FP16 throughput. The power envelopes are opposite: the B580 is rated at 190 W, uses a dual-slot cooler with a single 8-pin connector, and recommends a 450 W PSU. The RTX 4050 Mobile is an integrated GPU at 50 W, with no power connectors and no PSU recommendation. The B580 is a desktop card at 272 mm length; the RTX 4050 is a mobile IGP with no fixed dimensions.

The API support is identical: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 for both. The bus interface is also the same: PCIe 4.0 x8. Display outputs differ: the B580 has 1x HDMI 2.1 and 3x DisplayPort 2.1, while the RTX 4050 Mobile's outputs are portable device dependent.

Head-to-Head Benchmarks

The Vulkan test shows the largest gap. The Intel Arc B580 scores 109672, the RTX 4050 Mobile scores 75235. That is 45.8% ahead. This is a massive margin, likely reflecting the B580's higher raw bandwidth and FP32 throughput. The compute test is also decisive: 7729 versus 5947, a 30% lead for Intel. This aligns with the FP32 and texture rate differences.

DirectX 12 is another strong Intel win. The B580 scores 76 versus 61, a 24.6% advantage. That is consistent with modern API scaling and the 2x texture unit count. The PassMark G2D test also favors Intel: 709 versus 633, a 12% lead. The overall 3D score, PassMark G3D, goes to Intel at 15748 versus 14423, a 9.2% edge.

The NVIDIA wins are smaller in magnitude. DirectX 11: 130 versus 128, a 1.5% lead. DirectX 10: 79 versus 76, a 3.8% lead. DirectX 9: 184 versus 183, a 0.5% lead. None of these exceed 4%, and the two older APIs are effectively within noise. The RTX 4050 Mobile's single notable advantage is in the legacy feature set, but the margins are too thin to call it a meaningful strength.

The aggregate benchmark score tells the same story. The Intel Arc B580 averages 23021 points across all tests, versus 19049 for the RTX 4050 Mobile. That is a 20.8% difference in favor of Intel. The B580's percentile rank among all GPUs is 68, while the RTX 4050 Mobile sits at 63. The nearest rivals for the B580 are the AMD Radeon RX 580 2048SP (23061, -0.2%), NVIDIA GeForce RTX 2080 (22895, +0.6%), NVIDIA GeForce RTX 3080 (23172, -0.7%), and NVIDIA P106-100 (23249, -1%). For the RTX 4050 Mobile, the nearest rivals are the AMD Radeon RX 6600 (19036, +0.1%), NVIDIA Quadro K6000 (19030, +0.1%), NVIDIA Tesla K20m (19089, -0.2%), and NVIDIA RTX 2000 Ada Generation (18954, +0.5%). These neighbors indicate that the B580 is positioned among older high-end desktop parts, while the RTX 4050 Mobile is among midrange desktop and older workstation parts.

FAQ

Q: Which GPU performs better in compute workloads?

A: The Intel Arc B580 wins the PassMark GPU compute test by 30% (7729 versus 5947). Its FP32 rate is 13.67 TFLOPS versus 8.986 TFLOPS, and its FP16 rate is 27.34 TFLOPS versus 8.986 TFLOPS.

Q: How do the memory specs compare?

A: The B580 has 12 GB GDDR6 on a 192-bit bus with 456.0 GB/s bandwidth. The RTX 4050 Mobile has 6 GB GDDR6 on a 96-bit bus with 192.0 GB/s. The B580 has a 2x bus width and 2.375x bandwidth advantage.

Q: Which card wins in DirectX 12?

A: The Intel Arc B580 wins DirectX 12 with a 24.6% lead (76 vs 61). It also has more texture units (160 vs 80) and a higher pixel rate.

Q: Does the RTX 4050 Mobile win any benchmark?

A: Yes, it wins DirectX 9 (184 vs 183), DirectX 10 (79 vs 76), and DirectX 11 (130 vs 128). The margins are 0.5%, 3.8%, and 1.5%, respectively.

Q: What is the power consumption difference?

A: The Intel B580 is rated at 190 W, while the RTX 4050 Mobile is rated at 50 W. The B580 is a dual-slot card with an 8-pin connector; the RTX 4050 is an IGP with no connectors.

Q: How does the B580's overall score compare to the RTX 4050 Mobile?

A: The B580's average benchmark score is 23021, and the RTX 4050's is 19049. The B580 scores 20.8% higher on average.

Q: Which GPU has a higher transistor density?

A: The RTX 4050 Mobile has a density of 118.9M per mm², versus 72.1M per mm² for the B580. The NVIDIA die is smaller (159 mm² vs 272 mm²) but has nearly the same transistor count.

The Verdict

The data points to a clear recommendation. The Intel Arc B580 is the higher-performing GPU for modern workloads. It wins the majority of benchmark tests, and its wins are large. In Vulkan, it is 45.8% ahead. In GPU compute, it is 30% ahead. In DirectX 12, it is 24.6% ahead. The aggregate average score is 20.8% higher. The B580 also carries 12 GB of VRAM versus 6 GB, which is a significant capacity advantage for texture-heavy games. Its nearest rivals include the RTX 2080 and RTX 3080, placing it in the desktop high-end tier.

The RTX 4050 Mobile, however, has its own place. It wins three legacy API tests, but by margins of less than 4%. Its 50 W power envelope makes it suitable for devices where power and heat are limited. It is an integrated mobile part with no power connectors. The B580 is not a mobile part at all: it is a 190 W desktop card that requires an 8-pin connector and a 450 W PSU.

For a desktop user who wants raw performance, the Intel Arc B580 is the choice. It offers higher scores in every modern benchmark and a deeply higher memory bandwidth. For a mobile user who needs a GPU inside a laptop, the RTX 4050 Mobile is the only viable option of the two; the B580 cannot fit into that form factor. The RTX 4050 Mobile's wins are narrow, but they are relevant for older software stacks that rely on DirectX 9 through 11. The B580's wins are broader and much larger. Select the B580 for performance, select the RTX 4050 Mobile for portability and legacy API compatibility. The benchmark data does not support choosing the RTX 4050 Mobile for raw speed.