Intel Arc G3 vs Intel Core Ultra 5 125UL Comparison

The Verdict

The recorded data positions the Intel Arc G3 and Intel Core Ultra 5 125UL as two distinctly different mobile and desktop processors, respectively, with the Arc G3 targeting mobile platforms and the Ultra 5 125UL aimed at desktop systems. The Arc G3 operates on the Panther Lake architecture built on a 3 nm process, while the Ultra 5 125UL uses the Meteor Lake architecture on a 7 nm node. The Arc G3 offers 14 cores and 14 threads, matching the Ultra 5 125UL's thread count of 14, though the latter achieves this with 12 physical cores. The Arc G3 has a higher base clock of 1.90 GHz and boost clock of 4.60 GHz, compared to 1.30 GHz and 4.30 GHz for the Ultra 5 125UL. The TDP figures differ notably, with the Arc G3 rated at 25 watts and the Ultra 5 125UL at 15 watts.

The Arc G3 is the newer part, with a release date of May 27, 2026, while the Ultra 5 125UL launched on April 7, 2024. The Ultra 5 125UL carries a launch MSRP of $309, while the Arc G3 has no recorded launch MSRP. The Arc G3 uses the Intel BGA 2540 socket, whereas the Ultra 5 125UL uses Intel Socket 1851. The market segments differ, with the Arc G3 classified as mobile and the Ultra 5 125UL as desktop. Both processors are currently active in production and neither has an unlocked multiplier.

Where Each One Wins

The Arc G3 wins on raw processing speed, with its maximum boost clock of 4.60 GHz exceeding the Ultra 5 125UL's 4.30 GHz. This 0.30 GHz advantage gives the Arc G3 a higher ceiling for single-threaded workloads. The Arc G3 also has a larger shared L3 cache of 18 MB, compared to 12 MB on the Ultra 5 125UL, which can improve performance in workloads with large working sets. The per-core L1 cache on the Arc G3 is 192 KB, substantially larger than the 112 KB per core on the Ultra 5 125UL, and the per-core L2 cache is 2.5 MB versus 2 MB.

The memory subsystem favors the Arc G3, which supports LPDDR5X memory with a recorded bandwidth of 136.5 GB/s. The Ultra 5 125UL supports DDR5 memory with bandwidth dependent on the motherboard, and its recorded memory bandwidth is 89.6 GB/s. Both processors use dual-channel memory buses. The Arc G3 also uses PCIe Gen 5 with 4 CPU lanes, while the Ultra 5 125UL uses PCIe Gen 4 with 8 CPU lanes.

The Ultra 5 125UL wins on power efficiency, with a 15 watt TDP compared to the Arc G3's 25 watts. This 10 watt difference positions the Ultra 5 125UL as the lower-power choice for desktop deployments where energy consumption is a priority. The Ultra 5 125UL also offers more PCIe lanes, 8 versus 4, which can benefit desktop systems with multiple expansion devices.

Architecture Differences

The two processors come from different Intel architecture families. The Arc G3 uses the Panther Lake codename with a 3 nm process node, fabricated by Intel. The Ultra 5 125UL uses the Meteor Lake codename with a 7 nm process node, also fabricated by Intel. The process node difference, 3 nm versus 7 nm, indicates the Arc G3 is built on a more advanced manufacturing process.

Core configurations differ in structure. The Arc G3 has 14 cores and 14 threads, indicating a design without simultaneous multithreading. The Ultra 5 125UL has 12 cores and 14 threads, meaning it uses some form of multithreading to reach its thread count. Cache hierarchies differ across all levels. The Arc G3 has 192 KB of L1 cache per core, 2.5 MB of L2 cache per core, and 18 MB of shared L3 cache. The Ultra 5 125UL has 112 KB of L1 cache per core, 2 MB of L2 cache per core, and 12 MB of shared L3 cache.

Memory support differs significantly. The Arc G3 supports LPDDR5X memory with a fixed bandwidth of 136.5 GB/s. The Ultra 5 125UL supports DDR5 memory with bandwidth that depends on the motherboard, with a recorded figure of 89.6 GB/s. Both use dual-channel memory buses. Neither processor supports ECC memory.

PCIe connectivity also differs. The Arc G3 provides PCIe Gen 5 with 4 CPU lanes, while the Ultra 5 125UL provides PCIe Gen 4 with 8 CPU lanes. The integrated graphics differ as well, with the Arc G3 featuring Arc B370 graphics and the Ultra 5 125UL featuring Arc Xe-LPG 64EU graphics. The Arc G3 is a mobile part on Intel BGA 2540, while the Ultra 5 125UL is a desktop part on Intel Socket 1851.

FAQ

Q: Which processor has a higher boost clock?

A: The Intel Arc G3 has a boost clock of 4.60 GHz, which is 0.30 GHz higher than the Intel Core Ultra 5 125UL's boost clock of 4.30 GHz.

Q: What is the difference in TDP between the two processors?

A: The Intel Arc G3 has a TDP of 25 watts, while the Intel Core Ultra 5 125UL has a TDP of 15 watts, a difference of 10 watts.

Q: How do the cache sizes compare?

A: The Intel Arc G3 has 192 KB of L1 cache per core, 2.5 MB of L2 cache per core, and 18 MB of shared L3 cache. The Intel Core Ultra 5 125UL has 112 KB of L1 cache per core, 2 MB of L2 cache per core, and 12 MB of shared L3 cache.

Q: What memory types do the two processors support?

A: The Intel Arc G3 supports LPDDR5X memory with a bandwidth of 136.5 GB/s. The Intel Core Ultra 5 125UL supports DDR5 memory with bandwidth dependent on the motherboard, recorded at 89.6 GB/s.

Q: What are the release dates for these processors?

A: The Intel Arc G3 was released on May 27, 2026, and the Intel Core Ultra 5 125UL was released on April 7, 2024.

Q: Which processor uses the more advanced manufacturing process?

A: The Intel Arc G3 uses a 3 nm process node, while the Intel Core Ultra 5 125UL uses a 7 nm process node, making the Arc G3 the more advanced process.

Head-to-Head Benchmarks

The recorded benchmark data shows no head-to-head benchmark scores for this pair, so the comparison relies on the documented specifications. The Arc G3 holds a clear advantage in clock speeds. Its base clock of 1.90 GHz is 0.60 GHz higher than the Ultra 5 125UL's 1.30 GHz, and its boost clock of 4.60 GHz is 0.30 GHz higher than the Ultra 5 125UL's 4.30 GHz. These differences suggest the Arc G3 can deliver higher peak processing throughput in single-threaded tasks.

The cache hierarchy favors the Arc G3 across all three levels. The L1 cache per core is 192 KB on the Arc G3 versus 112 KB on the Ultra 5 125UL, a 80 KB advantage. The L2 cache per core is 2.5 MB versus 2 MB, a 0.5 MB advantage. The shared L3 cache is 18 MB versus 12 MB, a 6 MB advantage. These larger caches can reduce memory latency for frequently accessed data.

Memory bandwidth also favors the Arc G3, with 136.5 GB/s versus 89.6 GB/s, a 46.9 GB/s difference. This bandwidth advantage could benefit memory-intensive workloads, though the Ultra 5 125UL's DDR5 support depends on the motherboard configuration.

The Ultra 5 125UL counters with a lower TDP of 15 watts versus 25 watts, making it more power-efficient in absolute terms. The Ultra 5 125UL also provides 8 PCIe Gen 4 lanes, doubling the lane count of the Arc G3's 4 PCIe Gen 5 lanes. For desktop systems with multiple NVMe drives or expansion cards, the higher lane count may be more practical, despite the older PCIe generation.

Thread counts are equal at 14 threads, though the Arc G3 achieves this with 14 physical cores while the Ultra 5 125UL uses 12 cores with multithreading. The Arc G3's 14-core design may provide better raw multi-threaded performance, while the Ultra 5 125UL's fewer physical cores could mean lower complexity in power management. Both processors have active production status and locked multipliers, meaning neither offers overclocking.

The Arc G3 is the newer processor by approximately two years, with a release date of May 27, 2026, versus April 7, 2024, for the Ultra 5 125UL. The Arc G3 also uses the newer PCIe Gen 5 standard, though with fewer lanes. The integrated graphics differ, with the Arc G3 using Arc B370 and the Ultra 5 125UL using Arc Xe-LPG 64EU, suggesting different graphical capabilities within their respective power envelopes.

Both processors are positioned at the 50th percentile versus all CPUs in the database, indicating they occupy similar mid-range standing in overall CPU performance rankings. The Arc G3's higher clock speeds, larger caches, and higher memory bandwidth give it the specification-level advantage for compute-heavy workloads, while the Ultra 5 125UL's lower TDP and greater PCIe lane count make it the more flexible choice for power-conscious desktop systems. The data does not include head-to-head benchmark scores, so these conclusions derive strictly from the recorded specifications.