Intel Celeron 3865U

Intel 3865U

The Intel Celeron 3865U is an ULV (ultra low voltage) dual-core SoC based on the Kaby-Lake architecture and has been launched in the first quarter of 2017. The CPU can be found in ultrabooks as well as normal notebooks. In addition to two CPU cores clocked at 1.8 GHz (no Turbo Boost, no HyperThreading), the chip also integrates an HD Graphics 610 GPU and a dual-channel DDR4-2133/DDR3L-1600 memory controller. The SoC is manufactured using a 14 nm process with FinFET transistors.


Intel basically uses the same micro architecture compared to Skylake, so the per-MHz performance does not differ. The manufacturer only reworked the Speed Shift technology for faster dynamic adjustments of voltages and clocks, and the improved 14nm process allows much higher frequencies combined with better efficiency than before.


Due to the missing Turbo Boost and the low clock speeds, especially the single thread performance is very limited which results in a lower performance even for lower demanding tasks. The performance should be noticeably slower than the Celeron 3965 which offers 400 MHz higher clocked CPU cores. Therefore, the CPU is only suited for entry level tasks like office, web surfing and multimedia.


The integrated graphics unit called HD Graphics 610 (similar to the HD Graphics 510) represents the "GT1" version of the Kaby Lake GPU (Intel Gen. 9). Its 12 Execution Units, also called EUs, are clocked at 300 - 900 MHz and offer a performance somewhat below the older HD Graphics 4400. Only a few games of 2015 can be played smoothly in lowest settings.

Power Consumption

Specified at a TDP of 15 W (including CPU, GPU and memory controller), the CPU is best suited for small notebooks and ultrabooks (11-inches and above). Optionally, the TDP can be lowered to 10 watts (cTDP down), reducing both heat dissipation and performance and allowing even more compact designs.

SeriesIntel Celeron
CodenameKaby Lake
Series: Celeron Kaby Lake
Intel Celeron 3965U (compare)2200 MHz2 / 22 MB
» Intel Celeron 3865U1800 MHz2 / 22 MB
Intel Celeron 3965Y (compare)1500 MHz2 / 22 MB
Clock Rate1800 MHz
Level 1 Cache128 KB
Level 2 Cache512 KB
Level 3 Cache2 MB
Number of Cores / Threads2 / 2
Max. Power Consumption (TDP = Thermal Design Power)15 Watt
Manufacturing Technology14 nm
Max. Temperature100 °C
FeaturesDual-Channel LPDDR3-1866/DDR4-2133/DDR3L-1600 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI
GPUIntel HD Graphics 610 (300 - 900 MHz)
64 Bit64 Bit support
Starting Price$107 U.S.
Announcement Date03/01/2017
Product Link (external)Intel Celeron 3865U


WinRAR - Result
1108 KB/s (13%)
X264 HD Benchmark 4.0 - Pass 1
54.4 fps (20%)
TrueCrypt - Serpent Mean 100MB
0.1 GB/s (4%)
Super Pi mod 1.5 XS 1M *
21.4 Seconds (5%)
3DMark - Cloud Gate Standard Physics 1280x720
1375 Points (3%)
Geekbench 2 - 32 Bit - Floating Point
2838 Points (5%)
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

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