AMD Radeon 840M vs Intel Arc B580 Comparison
AMD Radeon 840M
Arc B580
PERFORMANCE BENCHMARKS
Analysis: AMD Radeon 840M vs Intel Arc B580
Head-to-Head Benchmarks
The database contains no direct head-to-head benchmark comparisons between the AMD Radeon 840M and the Intel Arc B580. However, the recorded data for the Arc B580 provides a clear reference point for standalone performance. The Arc B580 achieves an average benchmark score of 23,021 across all recorded tests, placing it at the 68th percentile of all GPUs in the database. Its nearest rivals in the database are the AMD Radeon RX 580 2048SP with an average score of 23,061 (0.2% higher), the NVIDIA GeForce RTX 2080 with 22,895 (0.6% lower), the NVIDIA GeForce RTX 3080 with 23,172 (0.7% higher), and the NVIDIA P106-100 with 23,249 (1.0% higher). This places the Arc B580 in a tight cluster of mid-range to upper-mid-range discrete GPUs, with deltas of under 1% against all four recorded rivals.
The AMD Radeon 840M has no benchmark entries in the database, no average score, and no nearest rivals recorded. Its percentile versus all GPUs is 50, which indicates it sits at the median of the database distribution, but without measured scores, a direct numerical comparison against the Arc B580 is not possible from the recorded data. The Arc B580's individual benchmark results show a strong spread across different test types. In 3DMark Steel Nomad DX12, it records a score of 3,068. In Geekbench OpenCL, it scores 92,821, and in Geekbench Vulkan, it scores 109,672, indicating a significant advantage in compute-oriented workloads relative to its rasterization scores. The PassMark suite shows a G3D score of 15,748, a GPU compute score of 7,729, a G2D score of 709, and DX9, DX10, DX11, and DX12 scores of 183, 76, 128, and 76 respectively.
Architecture Differences
The two GPUs come from different manufacturers and use different underlying architectures. The AMD Radeon 840M is built on the RDNA 3.5 architecture and is part of the Navi III IGP generation for Strix Point Mobile, using the Krackan Point chip. It is fabricated on a 4 nm process at TSMC. The Intel Arc B580 uses the Xe2-HPG architecture, belongs to the Battlemage generation (Arc 5), and is built on the BMG-G21 chip. It uses a 5 nm process, also at TSMC. The Radeon 840M is an integrated graphics processor (IGP), with its memory marked as System Shared, while the Arc B580 is a discrete dual-slot card with its own dedicated memory subsystem.
The Arc B580 contains 19,600 million transistors on a 272 mm² die, yielding a transistor density of 72.1 million transistors per mm². The Radeon 840M's transistor count and die size are listed as unknown, and no density figure is recorded. The Radeon 840M has 256 shading units, 16 texture mapping units, 8 ROPs, and 4 ray tracing cores. The Arc B580 has 2,560 shading units, 160 TMUs, 80 ROPs, and 20 ray tracing cores. Neither GPU lists tensor cores. The Radeon 840M's pixel rate is 23.20 GPixel/s, its texture rate is 46.40 GTexel/s, and its FP32 performance is 1,484.8 GFLOPS. The Arc B580's pixel rate is 213.6 GPixel/s, texture rate is 427.2 GTexel/s, and FP32 performance is 13.67 TFLOPS. The FP16 figures differ in ratio: the Radeon 840M runs FP16 at 1,484.8 GFLOPS with a 1:1 ratio to FP32, while the Arc B580 runs FP16 at 27.34 TFLOPS with a 2:1 ratio.
Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Radeon 840M uses a PCIe 4.0 x8 bus interface, and the Arc B580 also uses PCIe 4.0 x8. The Radeon 840M's display outputs are portable device dependent, while the Arc B580 provides 1x HDMI 2.1a and 3x DisplayPort 2.1.
Where Each One Wins
The Intel Arc B580 dominates on raw compute and rendering throughput based on the recorded specifications. Its FP32 performance of 13.67 TFLOPS is roughly nine times higher than the Radeon 840M's 1,484.8 GFLOPS. Its texture rate of 427.2 GTexel/s is more than nine times the Radeon 840M's 46.40 GTexel/s, and its pixel rate of 213.6 GPixel/s is over nine times the Radeon 840M's 23.20 GPixel/s. The Arc B580 also has 20 ray tracing cores versus 4, and 2,560 shading units versus 256, indicating a substantial advantage in geometry processing, shading, and ray-traced workloads. The Arc B580 has a 68th percentile ranking versus all GPUs, compared to the Radeon 840M's 50th percentile, which confirms that the discrete card sits well above the median in the database while the integrated part sits exactly at it.
The AMD Radeon 840M's advantages are in power and integration, not performance. It operates at a TDP of 15 W, compared to the Arc B580's 190 W. It requires no power connectors, while the Arc B580 uses a single 8-pin connector and a suggested PSU of 450 W. The Radeon 840M is an IGP with no slot width, meaning it occupies no expansion slot, whereas the Arc B580 is a dual-slot card measuring 272 mm in length, 115 mm in height, and 45 mm in width. The Radeon 840M's base clock is 400 MHz with a boost of 2,900 MHz, while the Arc B580 runs at a fixed 2,670 MHz base and boost. For systems where space, power draw, and heat are constrained, the Radeon 840M's integrated design fits into portable devices, as its display outputs are portable device dependent. For performance-bound workloads, the Arc B580's dedicated memory and far higher throughput make it the clear choice.
Specification Differences
The two cards differ across nearly every recorded specification field. The Radeon 840M uses a 4 nm process, the Arc B580 uses 5 nm. The Radeon 840M's chip is Krackan Point, the Arc B580's is BMG-G21. The Radeon 840M's architecture is RDNA 3.5, the Arc B580's is Xe2-HPG. The Radeon 840M belongs to the Navi III IGP generation for Strix Point Mobile, while the Arc B580 belongs to the Battlemage generation (Arc 5). The Radeon 840M's predecessor is Navi II IGP, the Arc B580's predecessor is Alchemist. The Radeon 840M has no recorded transistor count, die size, or transistor density; the Arc B580 has 19,600 million transistors, a 272 mm² die, and a density of 72.1M per mm². The Radeon 840M's base clock is 400 MHz and boost is 2,900 MHz, while the Arc B580's base and boost are both 2,670 MHz.
Memory differs completely. The Radeon 840M uses system shared memory with system-dependent bandwidth. The Arc B580 has 12 GB of GDDR6 memory on a 192-bit bus, with a bandwidth of 456.0 GB/s and a memory clock of 2,375 MHz (19 Gbps effective). The Radeon 840M has 256 shading units, 16 TMUs, 8 ROPs, and 4 RT cores. The Arc B580 has 2,560 shading units, 160 TMUs, 80 ROPs, and 20 RT cores. The Radeon 840M's pixel rate is 23.20 GPixel/s, texture rate is 46.40 GTexel/s, FP32 is 1,484.8 GFLOPS, and FP16 is 1,484.8 GFLOPS at a 1:1 ratio. The Arc B580's pixel rate is 213.6 GPixel/s, texture rate is 427.2 GTexel/s, FP32 is 13.67 TFLOPS, and FP16 is 27.34 TFLOPS at a 2:1 ratio. The Radeon 840M has a TDP of 15 W, is an IGP with no power connectors, and has portable-device-dependent display outputs. The Arc B580 has a TDP of 190 W, is dual-slot, uses one 8-pin power connector, requires a 450 W suggested PSU, and provides 1x HDMI 2.1a plus 3x DisplayPort 2.1. The Radeon 840M's length, height, and width are unrecorded; the Arc B580 is 272 mm long, 115 mm high, and 45 mm wide. The Radeon 840M was released on 2025-02-28, the Arc B580 on 2024-12-12. The Arc B580 has a launch MSRP of 249 USD.
FAQ
Q: Which GPU has higher raw compute performance?
A: The Intel Arc B580. Its FP32 throughput is 13.67 TFLOPS, compared to the AMD Radeon 840M's 1,484.8 GFLOPS, and its FP16 throughput is 27.34 TFLOPS versus 1,484.8 GFLOPS.
Q: How do their memory configurations compare?
A: The Arc B580 uses 12 GB of GDDR6 on a 192-bit bus with 456.0 GB/s of bandwidth. The Radeon 840M relies on system shared memory with system-dependent bandwidth.
Q: What are the power requirements for each?
A: The Radeon 840M has a TDP of 15 W and needs no power connectors. The Arc B580 has a TDP of 190 W, uses one 8-pin power connector, and has a suggested PSU of 450 W.
Q: Which GPU supports ray tracing?
A: Both support it. The Radeon 840M has 4 ray tracing cores, while the Arc B580 has 20 ray tracing cores.
Q: How do their process nodes differ?
A: The Radeon 840M is fabricated on a 4 nm process at TSMC, while the Arc B580 is fabricated on a 5 nm process at TSMC.
Q: What is the Arc B580's standing relative to other GPUs in the database?
A: The Arc B580 has a 68th percentile ranking versus all GPUs and an average benchmark score of 23,021. Its nearest recorded rivals are the AMD Radeon RX 580 2048SP at 23,061 (0.2% higher), the NVIDIA GeForce RTX 2080 at 22,895 (0.6% lower), the NVIDIA GeForce RTX 3080 at 23,172 (0.7% higher), and the NVIDIA P106-100 at 23,249 (1.0% higher).
The Verdict
The data separates these two GPUs by an enormous performance gap and an equally enormous power gap. The Intel Arc B580 is a discrete, dual-slot card with 2,560 shading units, 20 ray tracing cores, 12 GB of GDDR6 memory on a 192-bit bus, and 456.0 GB/s of bandwidth. Its average benchmark score of 23,021 and 68th percentile ranking place it among established discrete GPUs like the RTX 2080 and RTX 3080, with deltas under 1% against all four nearest rivals. Its FP32 throughput of 13.67 TFLOPS and pixel rate of 213.6 GPixel/s put it in an entirely different performance class than the Radeon 840M.
The AMD Radeon 840M is an integrated GPU with 256 shading units, 4 ray tracing cores, system shared memory, and a 15 W TDP. It has no recorded benchmark scores in the database, and its 50th percentile ranking versus all GPUs is exactly the median, which is consistent with an IGP that offers moderate capability without discrete-class performance. Its FP32 throughput of 1,484.8 GFLOPS is roughly one-ninth of the Arc B580's, and its pixel rate of 23.20 GPixel/s is similarly dwarfed.
The choice comes down to the system context. A portable device with no expansion slot and a 15 W power budget will use the Radeon 840M because the Arc B580 cannot physically or electrically fit in such a design. A desktop or larger chassis that can accommodate a 272 mm dual-slot card, a 450 W PSU, and a single 8-pin connector will get dramatically higher performance from the Arc B580. The recorded data shows no scenario where the Radeon 840M matches the Arc B580 on throughput, memory bandwidth, or benchmark standing; the Arc B580 is the performance winner in every measured specification category, while the Radeon 840M wins only on power draw, physical footprint, and integration flexibility.