AMD Radeon Instinct MI300X vs Intel Arc G3 Comparison

The Verdict

The AMD Radeon Instinct MI300X and Intel Arc G3 target entirely different segments of the graphics hardware market, and the recorded data reflects no direct overlap in their intended workloads. The MI300X is a data center compute accelerator built for massive parallel throughput, while the Arc G3 is an integrated graphics processor designed for portable devices. The database shows the MI300X delivers far higher raw compute metrics across every measured category, but it does so at a power envelope that is 30 times higher than the Arc G3. The Arc G3, by contrast, operates within a 25 W power budget and includes features like ray tracing cores and display outputs that the MI300X completely lacks. Benchmark results indicate the MI300X is for server-side compute tasks requiring maximum FP32 and FP16 throughput, whereas the Arc G3 is for lightweight graphics and API support in mobile systems. Neither product can substitute for the other based on the available specifications.

Architecture Differences

The two processors come from different foundries and use distinct process nodes. The AMD Radeon Instinct MI300X uses TSMC's 5 nm process, while the Intel Arc G3 uses Intel's 3 nm process. The MI300X is built on the CDNA 3.0 architecture with the Aqua Vanjaram chip, whereas the Arc G3 uses the Xe3-LPG architecture with the Panther Lake chip. The MI300X belongs to the Radeon Instinct (MIx) generation, and its predecessor is the FirePro Data Center. The Arc G3 belongs to the Arc Graphics-M (Panther Lake) generation and has no recorded predecessor.

The MI300X packs 153,000 million transistors on a 1017 mm² die, resulting in a transistor density of 150.4M per mm². The Arc G3's transistor count and die size are listed as unknown, with no density figure available. The MI300X uses HBM3 memory totaling 192 GB across an 8192-bit bus, delivering 10.3 TB/s of bandwidth. The Arc G3 uses system shared memory, with the bus width, type, and bandwidth all listed as system dependent.

Clock behavior differs significantly. The MI300X has a base clock of 1000 MHz and a boost clock of 2100 MHz, while the Arc G3 runs at a 300 MHz base and a 2400 MHz boost. The MI300X's memory clock is 2525 MHz, translating to 10.1 Gbps effective, but the Arc G3's memory clock is tied to the system. The MI300X has no display outputs, while the Arc G3's display outputs are portable device dependent.

Compute resources show a wide gap. The MI300X has 19,456 shading units, 1,216 TMUs, and zero ROPs. The Arc G3 has 1,280 shading units, 40 TMUs, and 20 ROPs. The MI300X lists no ray tracing cores, while the Arc G3 includes 10 ray tracing cores. Neither product lists tensor cores in the database.

The MI300X's pixel rate is 0 MPixel/s due to its lack of ROPs, while the Arc G3 achieves 48.00 GPixel/s. Texture rates are 2,553.6 GTexel/s for the MI300X versus 96.00 GTexel/s for the Arc G3. The MI300X delivers 81.72 TFLOPS of FP32 and 653.7 TFLOPS of FP16 (at 8:1 ratio). The Arc G3 produces 6.144 TFLOPS of FP32 and 12.29 TFLOPS of FP16 (at 2:1 ratio). The MI300X's FP32 output is roughly 13 times the Arc G3's, and its FP16 output is over 53 times higher.

Power and physical specifications diverge completely. The MI300X has a TDP of 750 W and uses an OAM Module slot width, with no power connectors listed and a suggested PSU of 1150 W. The Arc G3 has a 25 W TDP with an IGP slot width and no power connectors. The MI300X uses a PCIe 5.0 x16 bus interface, while the Arc G3's interface is IGP. The MI300X has no display outputs, while the Arc G3's outputs are portable device dependent.

API support also differs. The MI300X lists no DirectX, OpenGL, or Vulkan versions. The Arc G3 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300X was released on December 5, 2023, while the Arc G3's release date is May 31, 2026. The Arc G3 has an active production status, while the MI300X's production status is not listed.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries for these two products, so direct score comparisons are unavailable. However, the recorded specifications allow for a quantitative comparison of theoretical peak throughput. The MI300X's FP32 compute of 81.72 TFLOPS is 13.3 times higher than the Arc G3's 6.144 TFLOPS. In FP16, the MI300X's 653.7 TFLOPS is 53.2 times the Arc G3's 12.29 TFLOPS. These ratios come directly from the database values.

The MI300X's texture rate of 2,553.6 GTexel/s is 26.6 times the Arc G3's 96.00 GTexel/s. The Arc G3's pixel rate of 48.00 GPixel/s has no comparable figure on the MI300X, which sits at 0 MPixel/s because it lacks ROPs. The MI300X's memory bandwidth of 10.3 TB/s vastly exceeds the Arc G3's system dependent bandwidth, which cannot be quantified from the database.

Clock speeds show a different pattern. The Arc G3's boost clock of 2400 MHz is 300 MHz higher than the MI300X's 2100 MHz boost. The Arc G3 also has a higher pixel fill rate per clock due to its 20 ROPs. The MI300X's base clock of 1000 MHz is more than triple the Arc G3's 300 MHz base, but the Arc G3's boost clock closes that gap to a 14% difference.

The power efficiency comparison favors the Arc G3 when considering FP32 per watt. The Arc G3 delivers 6.144 TFLOPS at 25 W, which is 0.246 TFLOPS per watt. The MI300X delivers 81.72 TFLOPS at 750 W, which is 0.109 TFLOPS per watt. The Arc G3's efficiency is more than double the MI300X's based on these database figures. In FP16, the Arc G3 produces 12.29 TFLOPS at 25 W, or 0.492 TFLOPS per watt, while the MI300X produces 653.7 TFLOPS at 750 W, or 0.872 TFLOPS per watt, giving the MI300X a 1.77 times efficiency advantage in FP16.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Radeon Instinct MI300X delivers 81.72 TFLOPS, which is 13.3 times higher than the Intel Arc G3's 6.144 TFLOPS.

Q: Does the Intel Arc G3 support ray tracing?

A: Yes, the Arc G3 includes 10 ray tracing cores. The MI300X does not list any ray tracing cores in the database.

Q: What memory configuration does each GPU use?

A: The MI300X uses 192 GB of HBM3 on an 8192-bit bus with 10.3 TB/s bandwidth. The Arc G3 uses system shared memory with system dependent bandwidth.

Q: What is the power consumption difference?

A: The MI300X has a 750 W TDP, while the Arc G3 has a 25 W TDP, making the MI300X 30 times more power hungry.

Q: Which GPU supports modern graphics APIs?

A: The Arc G3 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The MI300X lists no DirectX, OpenGL, or Vulkan support in the database.

Q: What form factor does each GPU use?

A: The MI300X uses an OAM Module slot width with a PCIe 5.0 x16 interface and no display outputs. The Arc G3 uses an IGP slot width with display outputs that are portable device dependent.

Where Each One Wins

The AMD Radeon Instinct MI300X wins decisively in raw compute throughput, memory capacity, and memory bandwidth. Its 192 GB of HBM3 with 10.3 TB/s bandwidth provides massive data handling capability that the Arc G3 cannot match with system shared memory. The MI300X's 81.72 TFLOPS FP32 and 653.7 TFLOPS FP16 make it suitable for data center compute tasks where maximum arithmetic throughput is the priority. Its 2,553.6 GTexel/s texture rate supports heavy texture processing workloads. The MI300X also wins on transistor count and die area, with 153,000 million transistors on 1017 mm², though the Arc G3's transistor figures are unknown.

The Intel Arc G3 wins in power efficiency, API compatibility, and mobile integration. Its 25 W TDP is 30 times lower than the MI300X's 750 W, making it viable for portable devices where power draw is constrained. The Arc G3 provides display outputs and supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, all of which are absent from the MI300X's specification list. The Arc G3's 10 ray tracing cores enable hardware-accelerated ray tracing, a feature the MI300X does not offer. The Arc G3's boost clock of 2400 MHz exceeds the MI300X's 2100 MHz, giving it a higher maximum clock speed. The Arc G3 also has ROPs, allowing a measured pixel rate of 48.00 GPixel/s, while the MI300X has no pixel output capability.

The database shows the MI300X's FP16 efficiency of 0.872 TFLOPS per watt exceeds the Arc G3's 0.492 TFLOPS per watt, so the MI300X retains an efficiency lead in half-precision workloads. However, the Arc G3's FP32 efficiency of 0.246 TFLOPS per watt beats the MI300X's 0.109 TFLOPS per watt, indicating the Arc G3 handles single-precision tasks more efficiently per watt. The MI300X's release date of December 5, 2023, places it earlier than the Arc G3's May 31, 2026 release, so the Arc G3 is a newer product with active production status. The Arc G3's 3 nm process node is smaller than the MI300X's 5 nm node, though the MI300X's higher transistor count compensates in absolute compute terms.