AMD Radeon 820M vs Intel Arc B770 Comparison

The AMD Radeon 820M and Intel Arc B770 occupy opposite ends of the graphics hardware spectrum. The 820M is a 15 W integrated processor designed for thin portable devices, while the B770 is a 225 W dual-slot discrete card built for high-performance systems. The recorded database shows no direct head-to-head benchmark results between the two, as they have no shared performance metrics. This analysis relies on the architectural, specification, and feature data available for each product to explain their distinct roles.

Where Each One Wins

The AMD Radeon 820M operates as an integrated graphics processor, or IGP, meaning it shares system memory and requires no separate power connectors. This design makes it the only option for systems that rely on a single chip for both computation and graphics output. The 820M uses the RDNA 3.5 architecture and features 128 shading units, 8 texture mapping units, and 4 render output units. Its base clock runs at 400 MHz with a boost clock of 2800 MHz. The entire chip draws 15 W, which is a fixed power envelope that fits within the thermal constraints of a portable device chassis. The 820M is best suited for basic display output, light 2D workloads, and low-demand applications where the user cannot install a discrete graphics card.

The Intel Arc B770 wins on every raw performance metric recorded in the database. It features 4096 shading units, 256 texture mapping units, and 128 render output units, which are 32 times, 32 times, and 32 times the respective counts of the 820M. The B770 has 32 ray tracing cores compared to the 820M's 2, giving it a 16 to 1 advantage in dedicated ray tracing hardware. Its pixel rate of 307.2 GPixel/s is 27.4 times higher than the 820M's 11.20 GPixel/s. The texture rate of 614.4 GTexel/s is 27.4 times higher than the 820M's 22.40 GTexel/s. The FP32 compute throughput of 19.66 TFLOPS is 27.4 times greater than the 820M's 716.8 GFLOPS. The B770 also supports FP16 at a 2:1 ratio, reaching 39.32 TFLOPS, whereas the 820M runs FP16 at a 1:1 ratio, meaning it peaks at the same 716.8 GFLOPS as its FP32 output.

FAQ

Q: What are the power consumption requirements for each product?

A: The AMD Radeon 820M has a TDP of 15 W and uses no power connectors, as it is an integrated processor. The Intel Arc B770 has a TDP of 225 W, uses one 6-pin and one 8-pin power connector, and requires a 550 W power supply as suggested by the manufacturer.

Q: How much memory does each product use and what is the bus width?

A: The Radeon 820M uses system shared memory with a system dependent bandwidth, so its memory size, type, and bus width are all listed as system shared. The Intel Arc B770 has 16 GB of GDDR6 memory on a 256-bit bus with a bandwidth of 512.0 GB/s and a memory clock of 2000 MHz or 16 Gbps effective.

Q: Which product has more ray tracing cores?

A: The Intel Arc B770 has 32 ray tracing cores. The AMD Radeon 820M has 2 ray tracing cores. This gives the B770 a 16 to 1 advantage in dedicated ray tracing hardware.

Q: What is the process node and die size for each product?

A: The AMD Radeon 820M is built on a 4 nm process at TSMC. The Intel Arc B770 is built on a 5 nm process at TSMC and has a die size of 368 mm². The 820M's die size is not recorded in the database.

Q: What PCIe interface does each product use?

A: The AMD Radeon 820M uses a PCIe 4.0 x8 interface. The Intel Arc B770 uses a PCIe 4.0 x16 interface. Both are PCIe 4.0, but the B770 has twice the lane count.

Q: What are the display output options for each product?

A: The AMD Radeon 820M's display outputs are listed as portable device dependent, meaning they vary by the laptop or handheld design. The Intel Arc B770 provides 1x HDMI 2.1a and 3x DisplayPort 2.1 outputs.

Head-to-Head Benchmarks

The database has no recorded head-to-head benchmark results for these two products, and neither has an average benchmark score or a list of nearest rivals. However, the specification data provides direct comparisons across multiple measurable metrics. The most significant difference is in shading units. The Intel Arc B770 has 4096 shading units, while the AMD Radeon 820M has 128. This is a 32 to 1 ratio. The B770's texture units number 256 against the 820M's 8, again a 32 to 1 ratio. Render output units follow the same pattern at 128 versus 4, a 32 to 1 ratio.

The clock behavior differs substantially between the two. The 820M has a base clock of 400 MHz and a boost clock of 2800 MHz, which is a relatively large boost window indicating power and thermal headroom in a mobile context. The B770 has a base clock of 2100 MHz and a boost clock of 2400 MHz, a much narrower range. Despite the B770's lower boost clock relative to the 820M's boost, the B770's enormous unit counts produce far higher throughput. The FP32 performance of the B770 is 19.66 TFLOPS versus 716.8 GFLOPS for the 820M. The pixel rate is 307.2 GPixel/s versus 11.20 GPixel/s. The texture rate is 614.4 GTexel/s versus 22.40 GTexel/s. Each of these is a 27.4 times gap.

Memory bandwidth shows the most extreme difference. The B770 has 512.0 GB/s of dedicated GDDR6 bandwidth on a 256-bit interface. The 820M has system dependent bandwidth, meaning it relies on the host system's shared memory configuration. The B770 also has a fixed 16 GB memory capacity, while the 820M has no dedicated memory of its own. The FP16 compute ratio also differs, with the B770 offering 39.32 TFLOPS at a 2:1 ratio and the 820M offering 716.8 GFLOPS at a 1:1 ratio.

Specification Differences

The two products differ in nearly every recorded category. The AMD Radeon 820M uses the Krackan Point 2 chip under the RDNA 3.5 architecture, classified as Navi III IGP in the Strix Point Mobile generation. The Intel Arc B770 uses the BMG-G31 chip under the Xe2-HPG architecture, classified as Battlemage in the Arc 7 generation. The process nodes differ, with the 820M on 4 nm and the B770 on 5 nm, both fabricated by TSMC. The B770 has a recorded die size of 368 mm², while the 820M's die size is unknown.

The 820M has a base clock of 400 MHz and a boost clock of 2800 MHz. The B770 has a base clock of 2100 MHz and a boost clock of 2400 MHz. The memory configuration is entirely different, with the 820M using system shared memory and the B770 using 16 GB of GDDR6 on a 256-bit bus with 512.0 GB/s bandwidth. The TDP ranges from 15 W for the 820M to 225 W for the B770. The 820M is an IGP with no slot width, while the B770 is a dual-slot card. The 820M has no power connectors, while the B770 requires one 6-pin and one 8-pin connector and suggests a 550 W power supply.

The PCIe interface differs, with the 820M using x8 and the B770 using x16, both at PCIe 4.0. Display outputs are portable device dependent for the 820M, while the B770 provides 1x HDMI 2.1a and 3x DisplayPort 2.1. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The release dates differ, with the 820M released on 2025-02-28 and the B770 on 2025-12-31. The 820M's predecessor is Navi II IGP, while the B770's predecessor is Alchemist. The production status is active for the 820M, while the B770's status is not recorded.

Architecture Differences

The AMD Radeon 820M is built on the RDNA 3.5 architecture and belongs to the Navi III IGP generation for Strix Point Mobile systems. It uses a 4 nm process at TSMC. The chip is named Krackan Point 2. The 820M has 128 shading units, 8 TMUs, 4 ROPs, and 2 ray tracing cores. Its FP16 throughput matches its FP32 throughput at 716.8 GFLOPS, indicating a 1:1 ratio. The chip is designed to operate within a 15 W power envelope and uses system shared memory, which makes it suitable for compact portable devices where the display outputs depend on the specific product design.

The Intel Arc B770 is built on the Xe2-HPG architecture and belongs to the Battlemage generation under the Arc 7 lineup. It uses a 5 nm process at TSMC and has a die size of 368 mm². The chip is named BMG-G31. The B770 has 4096 shading units, 256 TMUs, 128 ROPs, and 32 ray tracing cores. Its FP16 throughput is 39.32 TFLOPS, which is double its FP32 throughput of 19.66 TFLOPS, indicating a 2:1 ratio. The B770 uses dedicated GDDR6 memory with a 256-bit bus and 512.0 GB/s bandwidth. Its power design requires a dual-slot cooler, one 6-pin and one 8-pin power connector, and a 550 W power supply suggestion.

The memory architecture is a fundamental distinction. The 820M has no local memory, so its bandwidth is system dependent and cannot be stated as a fixed number. The B770 has a fixed memory subsystem with 16 GB capacity, 256-bit bus width, and 512.0 GB/s bandwidth. The ray tracing core count also differs by a factor of 16, with 32 cores on the B770 and 2 on the 820M. Both products share the same API support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

The Verdict

The data indicates that the AMD Radeon 820M and Intel Arc B770 are designed for entirely different system classes. The 820M is an integrated processor with a 15 W TDP, no power connectors, and system shared memory. Its performance metrics are fixed by its small unit counts: 128 shading units, 8 TMUs, 4 ROPs, and 2 ray tracing cores. The 820M produces 716.8 GFLOPS of FP32 compute, 11.20 GPixel/s of pixel throughput, and 22.40 GTexel/s of texture throughput. This product belongs in a portable device where the display outputs are dependent on the specific laptop or handheld configuration.

The Intel Arc B770 is a discrete, dual-slot graphics card with a 225 W TDP, requiring one 6-pin and one 8-pin power connector and a 550 W power supply. It has 4096 shading units, 256 TMUs, 128 ROPs, and 32 ray tracing cores. It delivers 19.66 TFLOPS of FP32 compute, 39.32 TFLOPS of FP16 compute, 307.2 GPixel/s of pixel throughput, and 614.4 GTexel/s of texture throughput. It has 16 GB of GDDR6 memory on a 256-bit bus with 512.0 GB/s bandwidth. The B770 is meant for systems that can accommodate a large card and a dedicated power delivery path.

The release timeline shows the 820M came first on 2025-02-28, with the B770 following on 2025-12-31. The 820M has an active production status, while the B770's status is not recorded. The architectural lineage also differs, with the 820M succeeding Navi II IGP and the B770 succeeding Alchemist. There is no benchmark data to compare their real-world performance, so the specification differences stand as the only quantitative basis for distinction. The 27.4 times gap in FP32, pixel rate, and texture rate, combined with the 32 to 1 difference in unit counts and the 16 to 1 difference in ray tracing cores, confirms that the B770 is a high-throughput discrete solution. The 820M is a low-power integrated solution whose performance depends on the host system's shared memory. Each product wins in its intended context: the 820M for portability and low power, the B770 for raw graphics throughput in a full-size desktop system.