AMD Instinct MI455X vs Intel Arc B570 Comparison

Head-to-Head Benchmarks

The recorded database contains no direct head-to-head benchmark entries for the AMD Instinct MI455X and Intel Arc B570. The AMD Instinct MI455X has an empty benchmark array, an average benchmark score of zero, and a percentile rank of 50, while the Intel Arc B570 holds ten documented test results. This means the MI455X cannot be positioned against the Arc B570 using standardized workload scores; the comparison must rest on architecture and specification data.

The Intel Arc B570’s measured results place it in the 65th percentile of all GPUs in the database, with an average benchmark score of 20,556. Its nearest rivals in the database are the NVIDIA GeForce RTX 3070 Mobile at 20,534 (0.1% higher), the Intel Arc A750 at 20,582 (0.1% lower), the NVIDIA Quadro M4000M at 20,480 (0.4% higher), and the AMD Radeon R9 M390X at 20,662 (0.5% lower). The Arc B570 sits effectively at parity with these four cards, with deltas no larger than 0.5%, meaning its performance profile is tightly clustered around that reference group.

Individual Intel Arc B570 benchmark scores show its strongest result in Geekbench Vulkan at 96,844, followed by Geekbench OpenCL at 83,514. In Passmark tests, the graphics score reaches 14,195, while compute output is 7,281. DirectX 9 yields 164, DirectX 11 yields 118, DirectX 10 yields 65, and DirectX 12 yields 72. The 2D graphics score is 661. These figures demonstrate a card whose compute and API-specific workloads vary widely, with the higher-level Vulkan and OpenCL results far exceeding the legacy DirectX tests.

Because the AMD Instinct MI455X has no benchmark scores, the database cannot calculate win counts. The head-to-head benchmark field is empty, winsA is 0, and winsB is 0. Any claims about direct performance superiority are unsupported by the data. The MI455X’s percentile rank of 50 with zero average score reflects an absence of measurements, not a neutral mid-pack result.

Architecture Differences

The AMD Instinct MI455X uses the CDNA 5.0 architecture with the MI450 256CU chip, fabricated on a 2 nm process at TSMC. The Intel Arc B570 uses the Xe2-HPG architecture with the BMG-G21 chip, also fabricated at TSMC but on a 5 nm node. The MI455X is part of the Instinct (MIx) generation, while the Arc B570 belongs to the Battlemage (Arc 5) generation. The MI455X’s predecessor is Radeon Instinct; the Arc B570’s predecessor is Alchemist.

Transistor counts differ enormously. The MI455X packs 320,000 million transistors on a 2990 mm² die, giving a transistor density of 107.0M per mm². The Arc B570 has 19,600 million transistors on a 272 mm² die, with a density of 72.1M per mm². The MI455X die is more than ten times larger in area and holds over sixteen times the transistor count, though its density advantage is roughly 48% higher.

Memory architecture separates the two completely. The MI455X uses 432 GB of HBM4 on a 24,576-bit bus with 23.3 TB/s bandwidth, while the Arc B570 uses 10 GB of GDDR6 on a 160-bit bus with 380.0 GB/s bandwidth. The MI455X’s memory bandwidth is over sixty times higher. Clock behavior also diverges: the MI455X has a 1000 MHz base and 2400 MHz boost, with memory at 1900 MHz (7.6 Gbps effective), whereas the Arc B570 runs a flat 2500 MHz base and boost, with memory at 2375 MHz (19 Gbps effective).

Compute resources show a stark scale difference. The MI455X has 32,768 shading units, 1,024 TMUs, and zero ROPs, with a texture rate of 2,457.6 GTexel/s and a pixel rate of 0 MPixel/s. The Arc B570 has 2,304 shading units, 144 TMUs, 80 ROPs, and 18 RT cores, with a texture rate of 360.0 GTexel/s and a pixel rate of 200.0 GPixel/s. The MI455X has no RT cores listed, while the Arc B570 includes them. FP32 output for the MI455X is 157.3 TFLOPS, with FP16 at 157.3 TFLOPS (1:1). The Arc B570 delivers 11.52 TFLOPS FP32 and 23.04 TFLOPS FP16 (2:1).

Power and physical specifications differ radically. The MI455X has a TDP of 2300 W, uses an EAM Module slot width, has no power connectors, and requires a suggested PSU of 2700 W. The Arc B570 has a TDP of 150 W, is dual-slot, uses a single 8-pin connector, and needs a 450 W suggested PSU. The MI455X has no display outputs and no API support (DirectX, OpenGL, Vulkan all N/A). The Arc B570 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, with 1x HDMI 2.1a and 3x DisplayPort 2.1 outputs. The MI455X uses PCIe 6.0 x16; the Arc B570 uses PCIe 4.0 x8.

FAQ

Q: Which GPU has more shading units?

A: The AMD Instinct MI455X has 32,768 shading units, compared to the Intel Arc B570’s 2,304, a difference of over fourteen times.

Q: How do their memory bandwidths compare?

A: The MI455X provides 23.3 TB/s bandwidth from 432 GB of HBM4 on a 24,576-bit bus. The Arc B570 provides 380.0 GB/s from 10 GB of GDDR6 on a 160-bit bus. The MI455X’s bandwidth is roughly 61 times higher.

Q: What is the Intel Arc B570’s benchmark standing?

A: The Arc B570 holds a 65th percentile rank with an average score of 20,556. Its nearest rival, the NVIDIA GeForce RTX 3070 Mobile, scores 20,534, a 0.1% difference.

Q: Does the AMD Instinct MI455X support any graphics APIs?

A: No. The database lists DirectX, OpenGL, and Vulkan all as N/A for the MI455X. The Intel Arc B570 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What are the power requirements for each card?

A: The MI455X has a TDP of 2300 W with a suggested PSU of 2700 W and no power connectors. The Arc B570 has a TDP of 150 W, uses one 8-pin connector, and requires a 450 W suggested PSU.

Q: Which card has ray tracing support?

A: The Intel Arc B570 lists 18 RT cores. The AMD Instinct MI455X has no RT core count in the database.

Specification Differences

The two cards differ in every major specification category. Process node: 2 nm for the MI455X versus 5 nm for the Arc B570. Transistors: 320,000 million versus 19,600 million. Die size: 2990 mm² versus 272 mm². Transistor density: 107.0M per mm² versus 72.1M per mm².

Base clock: 1000 MHz versus 2500 MHz. Boost clock: 2400 MHz versus 2500 MHz. Memory clock: 1900 MHz (7.6 Gbps effective) versus 2375 MHz (19 Gbps effective). Memory size: 432 GB versus 10 GB. Memory type: HBM4 versus GDDR6. Bus width: 24,576 bit versus 160 bit. Bandwidth: 23.3 TB/s versus 380.0 GB/s.

Shading units: 32,768 versus 2,304. TMUs: 1,024 versus 144. ROPs: 0 versus 80. RT cores: not listed versus 18. Pixel rate: 0 MPixel/s versus 200.0 GPixel/s. Texture rate: 2,457.6 GTexel/s versus 360.0 GTexel/s. FP32: 157.3 TFLOPS versus 11.52 TFLOPS. FP16: 157.3 TFLOPS (1:1) versus 23.04 TFLOPS (2:1).

TDP: 2300 W versus 150 W. Slot width: EAM Module versus dual-slot. Power connectors: none versus 1x 8-pin. Suggested PSU: 2700 W versus 450 W. Bus interface: PCIe 6.0 x16 versus PCIe 4.0 x8. Display outputs: none versus 1x HDMI 2.1a and 3x DisplayPort 2.1. API support: all N/A versus DirectX 12 Ultimate (12_2), OpenGL 4.6, Vulkan 1.4. Dimensions: not listed for the MI455X versus 272 mm length, 115 mm height for the Arc B570. Release date: 2026-07-22 for the MI455X versus 2025-01-15 for the Arc B570. Production status: not listed versus Active.

Where Each One Wins

The AMD Instinct MI455X wins decisively in raw compute throughput. Its FP32 output of 157.3 TFLOPS is 13.7 times higher than the Arc B570’s 11.52 TFLOPS. FP16 output is 157.3 TFLOPS versus 23.04 TFLOPS, a 6.8 times advantage. Texture rate is 2,457.6 GTexel/s versus 360.0 GTexel/s, nearly seven times higher. Memory capacity is 432 GB versus 10 GB, and bandwidth is 23.3 TB/s versus 380.0 GB/s. The MI455X also leads in transistor count, die size, shading units, TMUs, and bus width. Its 2 nm process node gives it a density advantage over the 5 nm Arc B570.

The Intel Arc B570 wins in areas tied to graphics output and practical desktop use. It has 80 ROPs versus zero, a 200.0 GPixel/s pixel rate versus zero, and 18 RT cores versus none. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the MI455X has no API support. The Arc B570 has display outputs (1x HDMI 2.1a, 3x DisplayPort 2.1), while the MI455X has none. The Arc B570 also has a far lower TDP at 150 W versus 2300 W, a smaller suggested PSU of 450 W versus 2700 W, and a dual-slot form factor with a single 8-pin connector, whereas the MI455X uses an EAM Module with no connectors.

The Arc B570 holds the only actual benchmark data. Its average score of 20,556 places it in the 65th percentile, with rivals within 0.5%. The MI455X has no recorded scores, so any claim of benchmark superiority for it is not supported by the data. The MI455X’s wins are purely architectural, while the Arc B570’s wins are functional and measurement-based.

The Verdict

The data presents two products with no overlapping purpose. The AMD Instinct MI455X is a 2300 W compute module with 432 GB of HBM4 memory, 157.3 TFLOPS FP32, and no graphics outputs or APIs. Its architecture is CDNA 5.0 on a 2 nm node, built for massive parallel workloads where memory capacity and bandwidth dominate. The Intel Arc B570 is a 150 W dual-slot consumer card with 10 GB GDDR6, 11.52 TFLOPS FP32, 18 RT cores, full graphics API support, and display outputs. Its architecture is Xe2-HPG on a 5 nm node.

For a user needing raw compute throughput, memory scale, or extreme bandwidth, the MI455X is the only choice, based on its numeric superiority in every compute and memory category. For anyone needing a functional graphics card with API support, ray tracing, display connectivity, or reasonable power draw, the Arc B570 is the only option, because the MI455X lacks those features entirely.

The Arc B570’s benchmark percentile of 65 with an average score of 20,556 gives it a measurable performance position, closely matched to the NVIDIA GeForce RTX 3070 Mobile at 20,534 and the Intel Arc A750 at 20,582. The MI455X has no such measurements, so its performance class cannot be verified from the database. The release dates also separate them: the MI455X is dated 2026-07-22, while the Arc B570 is dated 2025-01-15, making the Arc B570 an active production card and the MI455X a newer, unmeasured entry.

The verdict aligns with the data: the MI455X wins on specification extremes, the Arc B570 wins on usability and measured results. One is a compute accelerator without display or API features, the other is a graphics card with proven benchmark scores. Neither card competes in the other’s domain, and the database provides no head-to-head results to suggest otherwise.