Intel Core i5-1235U vs Intel Celeron 5305U vs Intel Core i5-10310U
Intel Core i5-1235U
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The Intel Core i5-1235U is a mid-range mobile CPU for thin and light laptops based on the Alder Lake architecture. It was announced in early 2022 and offers 2 performance cores (P-cores, Golden Cove architecture) and 8 efficient cores (E-cores, Gracemont architecture). The P-cores support Hyper-Threading leading to 12 supported threads when combined with the E-cores. The clock rate ranges from 1.3 to 4.4 GHz on the performance cluster and 0.9 to 3.3 GHz on the efficient cluster. The performance of the E-cores should be similar to old Skylake cores (compare to the Core i7-6700HQ). All cores can use up to 12 MB L3 cache. Compared to the i5-1245U, the 1235U offers lower base clock speeds and only "Essentials" vPro management features. Compared to the P-series (28W) or H-series (45W), the 15W TDP may limit the sustained performance.
Performance
The average 1235U in our database is in the same league as the Ryzen 5 PRO 5650U and also, surprisingly enough, the i7-1250U and the i7-1260U, as far as multi-thread benchmark scores are concerned. This is a very respectable result, as of mid 2023.
Thanks to its decent cooling solution and a long-term CPU power limit of 27 W, the Beelink SEi12 is among the fastest systems built around the 1235U that we know of. It can be twice as fast in CPU-bound workloads as the slowest system featuring the same chip in our database, as of August 2023.
Architecture
The integrated memory controller supports various memory types up to DDR5-4800, DDR4-3200, LPDDR5-5200, and LPDDR4x-4267. The Thread Director (in hardware) can support the operating system to decide which thread to use on the performance or efficient cores for the best performance. For AI tasks, the CPU also integrates GNA 3.0 and DL Boost (via AVX2). Quick Sync in version 8 is the same as in the Rocket Lake CPUs and supports MPEG-2, AVC, VC-1 decode, JPEG, VP8 decode, VP9, HEVC, and AV1 decode in hardware. The CPU only supports PCIe 4.0 (x8 for a GPU and two x4 for SSDs).
The integrated graphics card is based on the Xe-architecture and offers 80 of the 96 EUs (Execution Units) operating at up to 1.2 GHz.
Power consumption
This ULV processor has a Base power consumption of 15 W (also known as the long-term power limit), with 55 W being its maximum Intel-recommended Turbo power consumption. Both values are too high to allow for passively cooled designs.
Core i5-1235U is manufactured on Intel's fourth-gen 10 nm process marketed as Intel 7 for decent, as of mid-2022, energy efficiency.
Intel Celeron 5305U
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The Intel Celeron 5305U is a low-power dual-core SoC for laptops, based on the Comet Lake architecture, which was introduced in 2020. Compared to Kaby Lake and Whiskey Lake, there are apparently no differences with Comet Lake apart from the two additional cores in the Top model Core i7-10710U. The processor is still manufactured using the mature 14nm process (14nm++ like Whiskey Lake). The processor cores clock at a fixed 2.3 GHz (no Turbo) and also only offer 2 threads (no HyperThreading). Compared to the more powerful Core i3, i5 and i7 variants, the Celeron does not offer SSE (2) support.
You can find more information about the Comet Lake architecture and the available processors on our Comet Lake topic page.
According to Intel, the integrated graphics card is called Intel UHD Graphics, but is an old Intel UHD Graphics 610. It is clocked in the Celeron 5205U at 300 - 900 MHz and is only sufficient for very demanding games. The CPU also offers an integrated DDR4-2666 / LPDDR4x 2933 / LPDDR3-2133 dual-channel memory controller as well as VP9 and H.265 video decoder and encoder.
Performance
The performance of the Celeron 5305U is in the lowest entry-level class of notebook processors in 2020. Due to the lack of Turbo and only 2 cores, the CPU cannot score points in either single-core or multi-core tasks. The processor is therefore only suitable for undemanding tasks such as surfing with a few tabs and office tasks.
The power consumption and performance can be set from 15 to 12.5 watts by the notebook manufacturer via cTDP-down. However, the processor then only runs at 800 MHz and significantly reduced performance. Even at 15 watts, however, the processor is suitable for thin and light notebooks.
Intel Core i5-10310U
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The Intel Core i5-10310U is a power efficient quad-core SoC for notebooks based on the Comet Lake (CML-U) generation and was announced in August 2019. Compared to the similar Whiskey Lake processors (e.g. Core i5-8665U), the only difference is support for higher memory speeds (DDR4-2666 vs 2400) and two additional cores in the top model (not in this i5). The processor cores are clocked between 1.7 and 4.4 GHz (unverified). Thanks to HyperThreading 8 threads can be used. Compared to the faster i5-10510U, the level 3 cache was reduced from 8 to 6 MB. More information on Comet Lake and all the models and articles on it can be found here. The CPU supports the professional management features under the vPro umbrella.
The integrated graphics adapter however is still the same as in the previous generations. It should be still called Intel HD Graphics 620 and clock from 300 - 1100 MHz in the i5. Furthermore, the SoC integrates a VP9 and H.265 de- and encoder and an integrated dual channel DDR4-2666 / LPDDR4x 2933 / LPDDR3-2133 memory controller.
Performance
The average 10310U in our database is not really any different than other quad-core laptop CPUs running at similar clock speeds, such as the Ryzen 5 3450U or the Core i5-1035G4.
Your mileage may vary depending on how high the CPU power limits are and how competent the cooling solution of your system is.
Power consumption
This Core i5 has a default TDP (also known as the long-term power limit) of 15 W, a value that laptop manufacturers are free to change to anything between 10 W and 25 W with clock speeds and performance changing correspondingly. Perhaps more importantly, short-term power consumption can be as high as 80 W or even 90 W as far as 10th gen Comet Lake U chips are concerned, making passively cooled designs unlikely.
This Intel processor is manufactured on a fairly old, as of late 2022, 14 nm Intel process for subpar energy efficiency.
Model | Intel Core i5-1235U | Intel Celeron 5305U | Intel Core i5-10310U | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Codename | Alder Lake-U | Comet Lake-U | Comet Lake-U | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Series | Intel Alder Lake-M | Intel Comet Lake | Intel Comet Lake | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Series: Comet Lake Comet Lake-U |
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Clock | 900 - 4400 MHz | 2300 MHz | 1700 - 4400 MHz | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
L1 Cache | 928 KB | 256 KB | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
L2 Cache | 9.5 MB | 1 MB | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
L3 Cache | 12 MB | 6 MB | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Cores / Threads | 10 / 12 | 2 / 2 | 4 / 8 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
TDP | 15 Watt | 15 Watt | 15 Watt | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Technology | 10 nm | 14 nm | 14 nm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
max. Temp. | 100 °C | 100 °C | 100 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Socket | BGA1744 | BGA1528 | BGA1528 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Features | DDR4-3200/LPDDR4x-4266/DDR5-4800/LPDDR5-5200 RAM, PCIe 4, Thr. Dir., DL Boost, GNA, vPro Ess., MMX SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, BMI2, ABM, FMA, ADX, SMEP, SMAP, EIST, TM1, TM2, HT, Turbo, SST, AES-NI, RDRAND, RDSEED, SHA | LPDDR3-2133/DDR4-2400 RAM, PCIe 2, 4 GT/s bus, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, BMI2, ABM, FMA, ADX, VMX, SMEP, SMAP, MPX, EIST, TM1, TM2, SST, AES-NI, RDRAND, RDSEED, SGX | LPDDR3-2133/DDR4-2666/LPDDR4-2933 RAM, PCIe 3, 4 GT/s bus, vPro, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, BMI2, ABM, FMA, ADX, VMX, SMX, SMEP, SMAP, MPX, EIST, TM1, TM2, HT, Turbo, SST, AES-NI, RDRAND, RDSEED, SGX | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
iGPU | Intel Iris Xe Graphics G7 80EUs ( - 1200 MHz) | Intel UHD Graphics 610 (300 - 900 MHz) | Intel UHD Graphics 620 (300 - 1150 MHz) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Architecture | x86 | x86 | x86 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Announced | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Manufacturer | ark.intel.com | ark.intel.com | ark.intel.com | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
$107 U.S. |
Benchmarks
Average Benchmarks Intel Core i5-1235U → 0% n=0
Average Benchmarks Intel Celeron 5305U → 0% n=0
Average Benchmarks Intel Core i5-10310U → 0% n=0

* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation