Intel Arc G3 EXTREME vs Intel Core Ultra 7 265K Comparison

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core Ultra 7 265K holds a substantial lead, with an average benchmark score of 70879 compared to the Intel Arc G3 EXTREME's 36699. This places the Ultra 7 265K in the 94th percentile of all CPUs, while the Arc G3 EXTREME sits in the 85th percentile.

Q: How do their core counts differ?

A: The Intel Core Ultra 7 265K provides 20 cores and 20 threads, while the Intel Arc G3 EXTREME offers 14 cores and 14 threads. Neither processor uses simultaneous multithreading.

Q: What are the clock speed differences between the two chips?

A: The Intel Core Ultra 7 265K has a base clock of 3.90 GHz and a boost clock of 5.50 GHz. The Intel Arc G3 EXTREME runs at a 1.90 GHz base clock and a 4.70 GHz boost clock.

Q: Which processor supports ECC memory?

A: The Intel Core Ultra 7 265K supports ECC memory, while the Intel Arc G3 EXTREME does not.

Q: What is the difference in L3 cache capacity?

A: The Intel Core Ultra 7 265K has 30 MB of shared L3 cache, while the Intel Arc G3 EXTREME has 18 MB of shared L3 cache.

Q: How many PCIe lanes does each processor provide?

A: The Intel Core Ultra 7 265K provides Gen 5 with 20 lanes, while the Intel Arc G3 EXTREME provides Gen 5 with 4 lanes.

Where Each One Wins

The benchmark data is unambiguous: the Intel Core Ultra 7 265K wins in all 17 recorded head-to-head tests. There are no benchmark categories where the Intel Arc G3 EXTREME takes the lead. The closest margin occurs in Cinebench R23 single-core, where the Ultra 7 265K leads by only 7.8%. The largest margin appears in Cinebench R23 multi-core, where the Ultra 7 265K leads by 59.1%.

The Intel Arc G3 EXTREME is a mobile processor with a 25 TDP, designed for power-constrained environments. Its performance profile is closer to desktop processors like the Intel Core Ultra 5 225, which scores 36938 on average, a mere 0.6% above the Arc G3 EXTREME. The Ultra 7 265K, by contrast, competes in a higher performance tier, with rivals such as the Intel Xeon 6511P (71051 average score) and the Intel Core i7-14700KF (70163 average score).

For workloads where single-threaded performance matters most, the gap narrows considerably. The Cinebench R23 single-core scores show 2020 for the Ultra 7 265K versus 1862 for the Arc G3 EXTREME, a 7.8% difference. In PassMark single-thread testing, the Ultra 7 265K scores 4928 versus 4293, a 12.9% lead. These are meaningful but far smaller than the multi-core deltas.

The data indicates that the Arc G3 EXTREME is a capable mobile part for its segment, but it cannot match the desktop-oriented Ultra 7 265K in any measured discipline. The use-case split is therefore not about workload type, but about platform: the Arc G3 EXTREME belongs to a mobile BGA 2540 socket, while the Ultra 7 265K targets desktop Socket 1851 systems.

Architecture Differences

The two processors come from different Intel architectures. The Intel Arc G3 EXTREME uses the Panther Lake architecture with the codename Panther Lake, while the Intel Core Ultra 7 265K uses the Arrow Lake architecture with the codename Arrow Lake-S. Both are built on a 3 nm process node, but the foundries differ: Intel fabricates the Arc G3 EXTREME, while TSMC fabricates the Ultra 7 265K.

The transistor counts and die sizes reflect the different design targets. The Ultra 7 265K contains 17,800 million transistors on a 243 mm² die. The Arc G3 EXTREME has no recorded transistor count or die size in the database, indicating a less publicized design.

Cache hierarchies differ in L2 and L3 capacity. Both use 192 KB of L1 cache per core, but the L2 cache is 2.5 MB per core on the Arc G3 EXTREME versus 3 MB per core on the Ultra 7 265K. The L3 cache shows a larger gap: 18 MB shared on the mobile part versus 30 MB shared on the desktop part.

Integrated graphics differ as well. The Arc G3 EXTREME pairs with an Arc B390 iGPU, while the Ultra 7 265K uses Arc Xe-LPG Graphics with 64 execution units. Memory support also diverges: the mobile chip uses LPDDR5X, while the desktop chip uses DDR5.

The production status for both is active. The Arc G3 EXTREME has a release date in May 2026, while the Ultra 7 265K was released in October 2024.

Specification Differences

The Intel Core Ultra 7 265K offers 20 cores and 20 threads, six more cores than the Arc G3 EXTREME's 14 cores and 14 threads. Base clocks differ substantially: 3.90 GHz on the Ultra 7 265K versus 1.90 GHz on the Arc G3 EXTREME. Boost clocks also favor the desktop chip: 5.50 GHz versus 4.70 GHz.

Thermal design power shows the starkest contrast. The Ultra 7 265K has a TDP of 125, while the Arc G3 EXTREME has a TDP of 25, a five-fold difference that reflects their respective desktop and mobile market segments.

The Ultra 7 265K uses an unlocked multiplier, the Arc G3 EXTREME does not. The desktop chip supports ECC memory; the mobile chip does not. Memory bandwidth favors the mobile part: 136.5 GB/s for the Arc G3 EXTREME versus 102.4 GB/s for the Ultra 7 265K, despite the latter's higher performance in other areas.

PCIe connectivity differs greatly. The Ultra 7 265K provides Gen 5 with 20 lanes, while the Arc G3 EXTREME provides Gen 5 with 4 lanes. Sockets are entirely different: Intel BGA 2540 for the mobile chip, Intel Socket 1851 for the desktop chip.

The Ultra 7 265K has a launch MSRP of $394. The Arc G3 EXTREME has no recorded launch MSRP in the database.

Head-to-Head Benchmarks

The 17 benchmark comparisons all favor the Intel Core Ultra 7 265K. The smallest delta appears in Cinebench R23 single-core: the Ultra 7 265K scores 2020 versus 1862 for the Arc G3 EXTREME, a 7.8% advantage. PassMark single-thread shows a 12.9% gap, with scores of 4928 and 4293.

The largest delta is in Cinebench R23 multi-core. The Ultra 7 265K scores 35850, the Arc G3 EXTREME scores 14655, giving the desktop chip a 59.1% lead. Cinebench R15 multi-core shows a similar story: 5020 versus 2192, a 56.3% gap. Cinebench R20 multi-core delivers 20918 versus 10945, a 47.7% difference.

PassMark workloads consistently show the Ultra 7 265K ahead by roughly half. Data compression scores 665554 versus 307094, a 53.9% lead. Data encryption scores 48246 versus 23881, a 50.5% lead. Extended instructions score 54333 versus 24017, a 55.8% lead. Floating-point math scores 189629 versus 86929, a 54.2% lead. Integer math scores 143242 versus 71164, a 50.3% lead. Random string sorting scores 79752 versus 37331, a 53.2% lead. Find prime numbers scores 491 versus 248, a 49.5% lead.

PassMark multithread shows a 47.7% gap, with 58594 versus 30659. PassMark physics shows a smaller 32.6% gap, with 3731 versus 2515.

The Cinebench R20 single-core test shows a 47.7% gap, with 2953 versus 1545. Cinebench R15 single-core shows the second-largest single-thread delta at 62.3%, with 708 versus 267.

The pattern is consistent: the Ultra 7 265K delivers roughly double the multi-threaded performance and a smaller but still decisive single-thread advantage. The only test where the gap falls below 10% is Cinebench R23 single-core.

The Verdict

The Intel Core Ultra 7 265K is the clear performance leader in every measured benchmark. Its 20 cores, higher clocks (up to 5.50 GHz boost), and 30 MB of L3 cache produce scores that place it in the 94th percentile of all CPUs. The Arc G3 EXTREME, with 14 cores, a 4.70 GHz boost, and 18 MB of L3 cache, sits in the 85th percentile.

The data shows that the Ultra 7 265K is the appropriate choice for workloads that stress multi-threaded performance: Cinebench R23 multi-core shows a 59.1% advantage, and PassMark multithread shows a 47.7% advantage. For single-threaded tasks, the Ultra 7 265K still leads, but the margin shrinks to as little as 7.8% in Cinebench R23 single-core.

The Arc G3 EXTREME targets a different platform entirely. Its BGA 2540 socket, 25 TDP, and LPDDR5X memory support indicate a mobile-first design. Its 136.5 GB/s memory bandwidth exceeds the Ultra 7 265K's 102.4 GB/s, which may benefit memory-sensitive tasks in a low-power envelope. However, the recorded benchmarks do not isolate memory bandwidth effects, and the Arc G3 EXTREME loses every recorded test.

The Ultra 7 265K, with its Socket 1851, 125 TDP, DDR5 support, ECC capability, and unlocked multiplier, is the choice for a high-performance desktop build. It also carries a launch MSRP of $394. The Arc G3 EXTREME, with no launch MSRP recorded, is the choice for a mobile system where the 25 TDP and integrated Arc B390 graphics matter more than raw compute scores.

Neither processor should be chosen for a workload where the other excels, because the Ultra 7 265K wins everywhere. The decision rests on form factor and power constraints: mobile users get the Arc G3 EXTREME, desktop users get the Ultra 7 265K. The benchmark data does not support any other conclusion.