AMD Instinct MI325X vs Intel Arc B770 Comparison

Head-to-Head Benchmarks

The recorded database contains no benchmark scores for either the AMD Instinct MI325X or the Intel Arc B770. The average benchmark score for both parts is zero, and the percentile ranking against all other GPUs sits at the 50th mark for each. With no head-to-head benchmark entries, there are no measured wins for either product in this comparison. The absence of scores means the performance relationship between these two accelerators cannot be established from direct testing data. Both devices hold identical percentile positions, which places them at the median of the database distribution, but this does not indicate comparable performance. The lack of recorded results leaves the measured performance comparison unresolved, and any numerical performance claims would require additional data collection.

Architecture Differences

The AMD Instinct MI325X and Intel Arc B770 diverge fundamentally in their architectural purpose. The MI325X uses the CDNA 3.0 architecture, built around the Aqua Vanjaram chip, and belongs to the Instinct (MIx) generation. The Arc B770 uses the Xe2-HPG architecture, built around the BMG-G31 chip, and belongs to the Battlemage (Arc 7) generation. Both parts are manufactured on a 5 nm process at TSMC, but the similarities end there.

The MI325X carries 153,000 million transistors on a 1017 mm² die, yielding a transistor density of 150.4 million per square millimeter. The Arc B770 has a die size of 368 mm² and its transistor count is listed as unknown in the database. The MI325X deploys 19,456 shading units, 1,216 texture mapping units, and no ROPs, yielding a texture rate of 2,553.6 GTexel/s and a pixel rate of 0 MPixel/s. The Arc B770 uses 4,096 shading units, 256 TMUs, and 128 ROPs, producing a texture rate of 614.4 GTexel/s and a pixel rate of 307.2 GPixel/s. The MI325X has no ray tracing cores listed, while the Arc B770 includes 32 ray tracing cores.

Memory configuration separates the two clearly. The MI325X uses 256 GB of HBM3e on an 8192-bit bus, delivering 6.14 TB/s of bandwidth. The Arc B770 uses 16 GB of GDDR6 on a 256-bit bus, delivering 512.0 GB/s. Clock behavior also differs: the MI325X runs at a 1000 MHz base and 2100 MHz boost with memory at 1500 MHz (6 Gbps effective), while the Arc B770 runs at a 2100 MHz base and 2400 MHz boost with memory at 2000 MHz (16 Gbps effective).

Compute output shows the scale gap. The MI325X delivers 81.72 TFLOPS FP32 and 81.72 TFLOPS FP16 with a 1:1 ratio. The Arc B770 delivers 19.66 TFLOPS FP32 and 39.32 TFLOPS FP16 with a 2:1 ratio. The MI325X has roughly 4.2 times the FP32 throughput of the Arc B770 based on these figures. Power envelopes are equally distinct: the MI325X has a TDP of 1000 W with a suggested PSU of 1400 W, while the Arc B770 has a TDP of 225 W with a suggested PSU of 550 W. The MI325X uses an OAM Module slot and has no power connectors, while the Arc B770 is a Dual-slot card requiring one 6-pin and one 8-pin connector.

Interface and display support differ as well. The MI325X uses PCIe 5.0 x16 and has no display outputs. The Arc B770 uses PCIe 4.0 x16 and provides 1x HDMI 2.1a and 3x DisplayPort 2.1. API support follows the same split: the MI325X lists DirectX, OpenGL, and Vulkan as N/A, while the Arc B770 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Release dates place the MI325X in 2024 and the Arc B770 at the end of 2025.

The Verdict

The data indicates two products aimed at entirely separate workloads. The AMD Instinct MI325X is a high-throughput compute accelerator with 256 GB of HBM3e memory, 6.14 TB/s of bandwidth, and 81.72 TFLOPS FP32. It carries a 1000 W TDP, requires a 1400 W suggested PSU, uses an OAM Module form factor, and has no display outputs. Its API support is listed as N/A for DirectX, OpenGL, and Vulkan, confirming it is not designed for conventional graphics rendering.

The Intel Arc B770 is a graphics card with 16 GB of GDDR6, 512.0 GB/s of bandwidth, 19.66 TFLOPS FP32, and 32 ray tracing cores. It uses a 225 W TDP, a 550 W suggested PSU, a Dual-slot form factor, and includes four display outputs. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, which positions it for gaming and general graphics use.

From the recorded specifications, the MI325X is the choice for memory-bound compute workloads that require large capacity and extreme bandwidth. The Arc B770 is the choice for graphics rendering, ray tracing, and display output in a conventional PCIe slot. The MI325X has no ROPs and a zero pixel rate, making it unsuitable for rasterized graphics output. The Arc B770 has 128 ROPs and a 307.2 GPixel/s pixel rate, which confirms rasterization capability. The MI325X has no ray tracing cores, while the Arc B770 has 32. The performance data cannot be compared directly because no benchmark scores exist for either product, so the verdict rests entirely on architectural and specification differences.

FAQ

Q: Which GPU has more memory bandwidth?

A: The AMD Instinct MI325X delivers 6.14 TB/s of bandwidth, while the Intel Arc B770 delivers 512.0 GB/s.

Q: What is the FP32 compute output of each GPU?

A: The MI325X delivers 81.72 TFLOPS FP32, and the Arc B770 delivers 19.66 TFLOPS FP32.

Q: Do both GPUs support ray tracing?

A: No. The Arc B770 includes 32 ray tracing cores, while the MI325X lists no ray tracing cores in the database.

Q: Which GPU has display outputs?

A: The Arc B770 provides 1x HDMI 2.1a and 3x DisplayPort 2.1. The MI325X has no display outputs.

Q: What is the power requirement difference?

A: The MI325X has a 1000 W TDP and a suggested PSU of 1400 W. The Arc B770 has a 225 W TDP and a suggested PSU of 550 W.

Q: Which GPU uses HBM3e memory?

A: The MI325X uses 256 GB of HBM3e on an 8192-bit bus. The Arc B770 uses 16 GB of GDDR6 on a 256-bit bus.

Where Each One Wins

The AMD Instinct MI325X wins on raw compute throughput. Its 81.72 TFLOPS FP32 figure is roughly 4.2 times the Arc B770's 19.66 TFLOPS. Its memory bandwidth of 6.14 TB/s is approximately 12 times the Arc B770's 512.0 GB/s. Memory capacity favors the MI325X decisively at 256 GB versus 16 GB. The MI325X also has a larger die at 1017 mm² versus 368 mm², and a higher transistor count at 153,000 million versus an unknown count for the Arc B770. Its texture rate of 2,553.6 GTexel/s exceeds the Arc B770's 614.4 GTexel/s. The MI325X uses a faster bus interface, PCIe 5.0 x16, against the Arc B770's PCIe 4.0 x16.

The Intel Arc B770 wins on graphics-specific features. It has 128 ROPs and a 307.2 GPixel/s pixel rate, while the MI325X has zero ROPs and a 0 MPixel/s pixel rate. The Arc B770 includes 32 ray tracing cores, which the MI325X lacks. The Arc B770 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the MI325X lists all three APIs as N/A. The Arc B770 provides display outputs, the MI325X provides none. The Arc B770 has a higher base clock at 2100 MHz versus 1000 MHz, and a higher boost clock at 2400 MHz versus 2100 MHz. Its memory clock runs at 2000 MHz (16 Gbps effective) versus 1500 MHz (6 Gbps effective) for the MI325X. The Arc B770 has a lower TDP at 225 W versus 1000 W, and a lower suggested PSU at 550 W versus 1400 W. Its Dual-slot form factor and standard power connectors contrast with the MI325X's OAM Module and lack of power connectors. The Arc B770 also leads in FP16 throughput ratio, delivering 39.32 TFLOPS at 2:1, which is half its FP32 rate, while the MI325X delivers FP16 at a 1:1 ratio.

Specification Differences

The two products differ across every major specification category in the database. Process node is identical at 5 nm TSMC for both, but die size differs: 1017 mm² for the MI325X versus 368 mm² for the Arc B770. Transistor count is 153,000 million for the MI325X and unknown for the Arc B770. Transistor density is 150.4M per mm² for the MI325X and not listed for the Arc B770.

Clock speeds differ in all three recorded fields. Base clock: 1000 MHz for the MI325X, 2100 MHz for the Arc B770. Boost clock: 2100 MHz for the MI325X, 2400 MHz for the Arc B770. Memory clock: 1500 MHz (6 Gbps effective) for the MI325X, 2000 MHz (16 Gbps effective) for the Arc B770.

Memory specifications diverge completely. The MI325X uses 256 GB of HBM3e on an 8192-bit bus with 6.14 TB/s bandwidth. The Arc B770 uses 16 GB of GDDR6 on a 256-bit bus with 512.0 GB/s bandwidth.

Compute unit counts differ. The MI325X has 19,456 shading units, 1,216 TMUs, and zero ROPs, with no ray tracing cores listed. The Arc B770 has 4,096 shading units, 256 TMUs, and 128 ROPs, with 32 ray tracing cores. Pixel rate is 0 MPixel/s for the MI325X and 307.2 GPixel/s for the Arc B770. Texture rate is 2,553.6 GTexel/s for the MI325X and 614.4 GTexel/s for the Arc B770.

Performance output differs in both precision formats. FP32: 81.72 TFLOPS for the MI325X, 19.66 TFLOPS for the Arc B770. FP16: 81.72 TFLOPS at 1:1 ratio for the MI325X, 39.32 TFLOPS at 2:1 ratio for the Arc B770.

Power and physical specifications differ. TDP is 1000 W for the MI325X and 225 W for the Arc B770. Suggested PSU is 1400 W for the MI325X and 550 W for the Arc B770. The MI325X uses an OAM Module slot with no power connectors; the Arc B770 is a Dual-slot card with one 6-pin and one 8-pin connector.

Interface and output support differ. Bus interface is PCIe 5.0 x16 for the MI325X and PCIe 4.0 x16 for the Arc B770. Display outputs are none for the MI325X and 1x HDMI 2.1a plus 3x DisplayPort 2.1 for the Arc B770. API support is N/A for DirectX, OpenGL, and Vulkan on the MI325X; the Arc B770 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Release dates place the MI325X in 2024 and the Arc B770 at the end of 2025. The MI325X lists its predecessor as Radeon Instinct, and the Arc B770 lists its predecessor as Alchemist. Neither product has a recorded successor, launch MSRP, production status, or physical dimensions in the database.