Intel Arc G3 vs NVIDIA Rubin GPU Comparison

Head-to-Head Benchmarks

The recorded data places these two parts at opposite ends of the GPU spectrum, and the benchmark results reflect that split clearly. The Intel Arc G3 delivers 6.144 TFLOPS of FP32 compute, while the NVIDIA Rubin GPU delivers 130.0 TFLOPS, a 21.2x advantage in raw shader throughput. In FP16 work, the gap narrows slightly but remains enormous: 12.29 TFLOPS for the Arc G3 versus 260.0 TFLOPS for the Rubin GPU, a 21.2x lead. These are not close figures, and no head-to-head benchmark entries exist in the database to soften the comparison.

Texture throughput tells a similar story. The Intel part reaches 96.00 GTexel/s, while the NVIDIA accelerator reaches 2,031.2 GTexel/s, which is 21.2x higher. Pixel rate is the only metric where the two parts land near each other: the Arc G3 produces 48.00 GPixel/s, and the Rubin GPU produces 54.41 GPixel/s, a 13% advantage for NVIDIA. The near parity in pixel rate is notable because the Rubin GPU has only 24 ROPs versus 20 on the Arc G3, a modest 4-ROP difference that does not scale with the massive gap in shading units and TMUs.

The FP32 and FP16 deltas both sit at 21.2x, which indicates the two architectures scale their compute ratios identically: each doubles its FP16 output from FP32. The Arc G3 lists 12.29 TFLOPS FP16 as a 2:1 ratio, and the Rubin GPU lists 260.0 TFLOPS FP16 as a 2:1 ratio. The texture rate difference also lands at 21.2x, meaning the TMU count difference (40 versus 896, a 22.4x gap) is the dominant factor, with clock speed closing the gap slightly.

Clock speeds show an interesting inversion. The Intel Arc G3 has a base clock of 300 MHz and a boost clock of 2400 MHz. The NVIDIA Rubin GPU has a base clock of 700 MHz and a boost clock of 2267 MHz. The Intel part boosts 133 MHz higher, but its 1280 shading units cannot compensate for the 28672 shading units on the Rubin GPU. The Rubin GPU's lower boost clock is offset by a 22.4x larger shader array.

The memory subsystem is not comparable in any conventional sense. The Arc G3 uses system-shared memory with system-dependent bandwidth, while the Rubin GPU uses 288 GB of HBM4 across a 16384-bit bus with 22.1 TB/s of bandwidth. The Intel part has no dedicated VRAM figure, no dedicated memory clock, and no dedicated bus width; all memory parameters are listed as system dependent.

The Verdict

The data supports only one conclusion for compute-heavy workloads: the NVIDIA Rubin GPU dominates the Intel Arc G3 by a factor of 21.2x in FP32, FP16, and texture throughput. The Rubin GPU is a server-class accelerator with a 2300 W TDP, an SXM Module slot width, and a suggested PSU of 2700 W, while the Arc G3 is a 25 W integrated graphics processor with no power connectors and an IGP bus interface.

The Arc G3 wins only in the narrow categories of portability, power draw, and display output. It has a 25 W TDP versus 2300 W, a 92x lower power envelope. It is an IGP with portable-device-dependent display outputs, while the Rubin GPU has no display outputs at all. The Arc G3 also supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, whereas the Rubin GPU lists N/A for all three APIs, reflecting its server role.

The pixel rate comparison is the only place where the Arc G3 is competitive, trailing by just 13%. This indicates that for purely rasterization-bound work where pixel output is the bottleneck, the two parts are closer than any other metric suggests. However, the Rubin GPU still wins that category.

Architecture Differences

The Intel Arc G3 uses the Panther Lake chip with the Xe3-LPG architecture, part of the Arc Graphics-M (Panther Lake) generation. The NVIDIA Rubin GPU uses the GR100 chip with the Rubin architecture, part of the Server Rubin (Rxx) generation. Both are built on a 3 nm process, but the foundries differ: Intel fabricates the Arc G3, while TSMC fabricates the Rubin GPU.

The transistor counts could not be more different. The Arc G3 lists its transistor count as unknown, while the Rubin GPU lists 336,000 million transistors. The die size follows the same pattern: unknown for the Arc G3, 1456 mm² for the Rubin GPU. The transistor density for the Rubin GPU is 230.8M / mm², a figure the Arc G3 does not report.

The compute feature sets diverge sharply. The Arc G3 has 1280 shading units, 40 TMUs, 20 ROPs, and 10 RT cores, with no tensor core count listed. The Rubin GPU has 28672 shading units, 896 TMUs, 24 ROPs, no RT core count listed, and 896 tensor cores. The Arc G3 includes dedicated ray tracing hardware and full graphics API support, while the Rubin GPU omits graphics APIs entirely and is built around its tensor core array.

The memory architectures reflect their different roles. The Arc G3 shares system memory, with no dedicated VRAM size, type, bus width, or bandwidth figures. The Rubin GPU uses 288 GB of HBM4 on a 16384-bit bus with 22.1 TB/s of bandwidth and a memory clock of 2695 MHz (10.8 Gbps effective). The Intel part's memory clock is listed as system shared.

Specification Differences

The two parts differ in nearly every recorded specification field. The Arc G3 has a 300 MHz base clock and 2400 MHz boost clock; the Rubin GPU has a 700 MHz base clock and 2267 MHz boost clock. The Arc G3 draws 25 W; the Rubin GPU draws 2300 W. The Arc G3 is an IGP with no power connectors and no suggested PSU; the Rubin GPU is an SXM Module with a suggested PSU of 2700 W.

The bus interface differs: IGP for the Arc G3, PCIe 6.0 x16 for the Rubin GPU. Display outputs differ: portable-device-dependent for the Arc G3, none for the Rubin GPU. The API support differs completely: the Arc G3 lists DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the Rubin GPU lists N/A for all three.

The release dates differ by five months. The Rubin GPU has a release date of 2025-12-31, and the Arc G3 has a release date of 2026-05-31. The Rubin GPU lists its predecessor as Server Blackwell; the Arc G3 lists no predecessor or successor. Neither part has a launch MSRP in the database.

The Arc G3 reports no dimensions, while the Rubin GPU also reports no dimensions. The production status for both is Active. The Arc G3 has no memory size, type, bus width, or bandwidth figures beyond system shared and system dependent, while the Rubin GPU has full memory specifications. The Arc G3 has no tensor core count, and the Rubin GPU has 896 tensor cores. The Arc G3 has 10 RT cores, and the Rubin GPU has no RT core count listed.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA Rubin GPU delivers 130.0 TFLOPS of FP32 compute, which is 21.2x higher than the Intel Arc G3's 6.144 TFLOPS.

Q: How do the power requirements compare?

A: The Intel Arc G3 has a 25 W TDP and requires no power connectors, while the NVIDIA Rubin GPU has a 2300 W TDP and a suggested PSU of 2700 W.

Q: Does either GPU support DirectX?

A: Only the Intel Arc G3 supports DirectX 12 Ultimate (12_2), along with OpenGL 4.6 and Vulkan 1.4. The NVIDIA Rubin GPU lists N/A for DirectX, OpenGL, and Vulkan.

Q: What memory configurations do the two GPUs use?

A: The Intel Arc G3 uses system-shared memory with system-dependent bandwidth and no dedicated VRAM. The NVIDIA Rubin GPU uses 288 GB of HBM4 on a 16384-bit bus with 22.1 TB/s of bandwidth.

Q: Which GPU has more shading units?

A: The NVIDIA Rubin GPU has 28672 shading units, which is 22.4x more than the Intel Arc G3's 1280 shading units.

Q: How do the pixel rates compare?

A: The NVIDIA Rubin GPU achieves 54.41 GPixel/s, which is 13% higher than the Intel Arc G3's 48.00 GPixel/s. This is the closest performance metric between the two parts.

Where Each One Wins

The NVIDIA Rubin GPU wins every compute and memory category by a wide margin. Its 130.0 TFLOPS FP32 and 260.0 TFLOPS FP16 make it the clear choice for any workload that depends on shader throughput, tensor operations, or large memory capacity. The 288 GB of HBM4 and 22.1 TB/s of bandwidth support data-intensive server workloads, and the 896 tensor cores add dedicated AI acceleration hardware that the Arc G3 does not list at all. The 2300 W TDP and SXM Module form factor indicate a data-center installation scenario rather than a desktop or portable one.

The Intel Arc G3 wins on power efficiency and integration. Its 25 W TDP is 92x lower than the Rubin GPU's 2300 W TDP, making it suitable for portable devices where power draw is constrained. The IGP form factor with no power connectors means it requires no external power delivery. It also provides display outputs, which the Rubin GPU lacks entirely, and it supports the full graphics API stack: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The 10 RT cores give it hardware ray tracing capability, a feature the Rubin GPU does not list.

The pixel rate comparison is the only area of near parity. The Arc G3's 48.00 GPixel/s trails the Rubin GPU's 54.41 GPixel/s by only 13%. This suggests that in scenarios where pixel output is the limiting factor, the two parts perform at similar levels despite the massive differences in every other specification. The Arc G3's 2400 MHz boost clock is also 133 MHz higher than the Rubin GPU's 2267 MHz boost clock, which contributes to its competitive pixel throughput.

The release timeline puts the Rubin GPU five months earlier, with a release date of 2025-12-31 versus the Arc G3's 2026-05-31. The Rubin GPU has a recorded predecessor in Server Blackwell, while the Arc G3 lists none. Both parts are marked as Active in production status. For a user selecting between these two, the decision is binary: the Rubin GPU for raw compute and memory capacity, the Arc G3 for integrated graphics, display output, and low power draw.