Intel Core i3-1215U vs Intel Core i5-8500 Comparison

The database pits two very different Intel processors against each other: the Core i5-8500, a six-core Coffee Lake desktop chip from 2018, and the Core i3-1215U, a low-power Alder Lake-U mobile chip from 2022. Despite a four-year gap, a 15-watt TDP on one side and 65 watts on the other, the recorded results land remarkably close: the i5-8500 sits in the 68th percentile of all CPUs with an average benchmark score of 13142, while the i3-1215U sits in the 67th percentile at 12604. The head-to-head record is 12 wins to 7 in favor of the older desktop part, but the pattern behind those wins tells a more interesting story about how each architecture spends its resources.

Head-to-Head Benchmarks

Cinebench is a clean sweep for the Core i5-8500, and the margins are strikingly uniform. The i5-8500 scores 814 versus 669 in Cinebench R15 multi-core, a 21.7 percent lead, and posts nearly identical gaps across the rest of the suite: 3393 versus 2790 in R20 multi-core (21.6 percent), 8079 versus 6644 in R23 multi-core (21.6 percent), 478 versus 393 in R20 single-core (21.6 percent), and 1140 versus 938 in R23 single-core (21.5 percent). A sustained render workload is exactly where six full-size cores at a 65-watt TDP should dominate, and the data confirms it with unusual consistency. Even Cinebench R15 single-core goes to the desktop chip, 114 to 94.

Geekbench flips part of that script. Multi-core still belongs to the i5-8500 at 4752 versus 4365, an 8.9 percent edge, but the i3-1215U wins single-core outright, 1485 to 1342, a 9.6 percent advantage for the mobile part. The pattern sharpens in Passmark single-thread, where the i3-1215U scores 3218 against 2441, a 24.1 percent lead. Two modern Golden Cove-class performance cores boosting to 4.40 GHz simply outrun Coffee Lake's best single-thread response, even inside a 15-watt envelope.

The Passmark suite splits along the same fault line. The i5-8500 wins data compression (134673 versus 116705, up 15.4 percent), extended instructions (11480 versus 6868, a 67.2 percent blowout), prime finding (36 versus 32), physics (628 versus 583, 7.7 percent), and string sorting (16294 versus 13046, 24.9 percent). The i3-1215U counters with data encryption at 7041 versus 3027, a 57 percent win that likely reflects modern cryptography instructions the older architecture lacks, plus integer math at 35534 versus 26551 (25.3 percent ahead), floating point math at 25379 versus 22489 (11.4 percent ahead), and the overall Passmark multithread score at 10472 versus 9532 (9 percent ahead).

Architecture Differences

The two chips embody opposite design philosophies. The Core i5-8500 is a homogeneous Coffee Lake design on Intel's 14 nm node: 6 cores, 6 threads, no hyper-threading, a 3.00 GHz base clock and a 4.10 GHz boost. Its 154 mm² die carries 64 KB of L1 and 256 KB of L2 per core, plus 9 MB of shared L3. It fits Socket 1151, supports DDR4 on a dual-channel bus with 42.7 GB/s of bandwidth, offers PCIe Gen 3 with 16 CPU lanes, and pairs with UHD Graphics 630. It is now end-of-life, having launched at an MSRP of $192.

The Core i3-1215U is an Alder Lake-U hybrid on Intel's 10 nm process: 6 cores and 8 threads arranged as performance and efficiency cores, boosting as high as 4.40 GHz from a low base clock, all inside a 15-watt TDP. It carries more cache per core (80 KB L1, 1.25 MB L2) and more shared L3 at 10 MB. Its platform is newer across the board: dual-channel DDR4 or DDR5 memory, PCIe Gen 4 with 20 CPU lanes, and UHD Graphics with 64 execution units. It ships soldered on BGA 1744, meaning no socket upgrades, and it remains in active production.

The comparison is therefore not desktop versus desktop. One is a 65-watt workstation-class chip meant for sustained load in a tower; the other is a battery-conscious mobile part whose burst behavior and instruction support punch above its power class.

The Verdict

The data supports a clear split. Buyers who need throughput for sustained workloads should take the Core i5-8500: it wins every Cinebench test by roughly 21 to 22 percent, leads Geekbench multi-core by 8.9 percent, and dominates string sorting, compression, and extended-instruction tests. It sits in the 68th percentile with an average score of 13142, fractionally ahead of rivals such as the Core i5-9400F (0.8 percent behind it) and the Core i7-10750H (0.9 percent behind), while the Core i7-7700K edges it out by 1.1 percent.

Buyers who prioritize responsiveness and efficiency should take the Core i3-1215U. It leads Geekbench single-core by 9.6 percent and Passmark single-thread by 24.1 percent, wins integer math by 25.3 percent and encryption by 57 percent, and even takes the overall Passmark multithread crown by 9 percent, all at a 15-watt TDP versus 65 watts. Its nearest rivals include the Core i5-1230U (0.4 percent behind), the Core i3-10105F (0.3 percent ahead), and, curiously, the AMD EPYC 9174F (0.5 percent behind), illustrating how averaged scores can cluster across wildly different hardware.

Note that the older chip is end-of-life, while the Alder Lake part is active, which matters for platform longevity, memory choice (DDR5 support exists only on the newer chip), and PCIe lane availability.

FAQ

Q: Which CPU is faster overall?

A: The Core i5-8500 has the higher average benchmark score, 13142 versus 12604, and the better percentile rank, 68th versus 67th, with a 12-to-7 win record in the head-to-head data.

Q: Which one is better for rendering?

A: The Core i5-8500, decisively. It wins all six Cinebench tests by margins between 21.3 and 21.7 percent, including 8079 versus 6644 in R23 multi-core.

Q: Which CPU has better single-core performance?

A: The Core i3-1215U. It leads Passmark single-thread 3218 to 2441 (24.1 percent) and Geekbench single-core 1485 to 1342 (9.6 percent), though it loses the Cinebench single-core tests by about 21.5 percent.

Q: How do their power envelopes compare?

A: The i3-1215U is rated at 15 watts TDP, while the i5-8500 is rated at 65 watts, a dramatic difference that explains why the mobile chip's near-parity in average scores is impressive.

Q: What memory does each support?

A: The i5-8500 supports DDR4 only on a dual-channel bus with 42.7 GB/s of bandwidth. The i3-1215U supports both DDR4 and DDR5 on a dual-channel bus.

Q: Are both chips still in production?

A: No. The Core i5-8500 is end-of-life. The Core i3-1215U is active.

Where Each One Wins

The Core i5-8500 is the pick for sustained multi-core work: 3D rendering across every Cinebench generation, physics simulation (628 versus 583), data compression (134673 versus 116705), string sorting (16294 versus 13046), prime calculations, and any workload leaning on extended instructions, where its 67.2 percent lead is the largest gap in the entire dataset. With six equal cores and a 65-watt envelope, it delivers consistent throughput that the 15-watt hybrid cannot hold under long loads.

The Core i3-1215U is the pick where burst speed and modern instructions matter: snappy application launches and lightly threaded tasks (single-thread wins of 24.1 and 9.6 percent), integer-heavy code (25.3 percent ahead), floating point math (11.4 percent ahead), and encryption, where its 57 percent victory is the single biggest win for either chip. Its hybrid core layout, newer 10 nm node, DDR5 and PCIe Gen 4 support, and 20 CPU PCIe lanes make it the more modern platform, all while matching a 65-watt desktop chip in average performance within a fraction of a percentile. The choice reduces to this: sustained throughput favors the veteran desktop part, responsiveness and platform currency favor the mobile upstart.