Core i5-8259U

Details and Benchmarks for Intel Core i5-8259U

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Please take all results with a big grain of salt. Sysbuilds is in alpha stage at the moment which can lead to wrong data, strange counting errors, silly results and more. This site is under active development.

Benchmark Results

Combined benchmark scores based on multiple data points, giving a quick overview of this processor's performance.

Overall Score

Overall score for Core i5-8259U based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

5,126 Rank: 771
Rank Name Score Visual
767 Xeon E3-1220 v6 5,131
+0.1%
768 Core i5-4590 5,131
+0.1%
769 Core i5-7260U 5,129
+0.1%
770 Core i7-8750H 5,127
+0%
771 Core i5-8259U 5,126
772 Ryzen 5 3400G 5,125
+-0%
773 Core i5-10200H 5,125
+-0%
774 Core i3-6100 5,124
+-0%
775 Ryzen 5 2400G 5,123
-0.1%
776 Xeon E3-1230 V2 5,122
-0.1%

View full ranking →

Multicore Score

Multicore performance score for Core i5-8259U based on multi-threaded benchmark results.

4,801 Rank: 841
Rank Name Score Visual
837 Core i5-4670S 4,803
+0%
838 Core i5-4590 4,803
+0%
839 Xeon E5-2450 v2 4,803
+0%
840 Ryzen 5 3550H 4,801
+0%
841 Core i5-8259U 4,801
842 Core i7-8559U 4,800
+-0%
843 Core i7-6700TE 4,800
+-0%
844 Core i7-8665U 4,799
+-0%
845 Core i7 965 4,796
-0.1%
846 Atom C3955 4,795
-0.1%

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Singlecore Score

Single-core performance score for Core i5-8259U based on single-threaded benchmark results.

5,342 Rank: 699
Rank Name Score Visual
695 Core i7-4610M 5,347
+0.1%
696 Xeon Gold 6152 5,344
+0%
697 Core i7-6650U 5,344
+0%
698 EPYC 7272 5,342
+0%
699 Core i5-8259U 5,342
700 Xeon E-2104G 5,342
+0%
701 Core i5-1035G7 5,339
-0.1%
702 Ryzen 5 3400G 5,337
-0.1%
703 Pentium Gold G5400 5,337
-0.1%
704 Pentium G4600 5,335
-0.1%

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Workload Scores

Performance scores grouped by workload type, normalized and aggregated from multiple raw benchmark results.

Number Crunching

Aggregated score for Core i5-8259U based on integer math, floating point math, and prime number computation benchmarks.

4,713 Rank: 632
Rank Name Score Visual
628 Core i7-7700 4,718
+0.1%
629 Core i5-10400H 4,716
+0.1%
630 Core i7-4980HQ 4,715
+0%
631 Core i7-990X 4,714
+0%
632 Core i5-8259U 4,713
633 Xeon E-2224G 4,712
+-0%
634 Core i5-8500T 4,712
+-0%
635 Ryzen 5 2500X 4,712
+-0%
636 Core i3-10100 4,712
+-0%
637 Core i5-10300H 4,712
+-0%

View full ranking →

Data Processing

Aggregated score for Core i5-8259U based on data encryption, data compression, and string sorting benchmarks.

4,695 Rank: 686
Rank Name Score Visual
682 Xeon E3-1275 v3 4,697
+0%
683 Xeon E5-1630 v4 4,696
+0%
684 Core i7-4770K 4,696
+0%
685 Xeon E3-1275 V2 4,696
+0%
686 Core i5-8259U 4,695
687 Core i7-8705G 4,695
+0%
688 Core i7-7700T 4,694
+-0%
689 Core i7-4770 4,694
+-0%
690 Xeon E5-2420 v2 4,693
+-0%
691 Xeon X5670 4,693
+-0%

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Physics & Compute

Aggregated score for Core i5-8259U based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,809 Rank: 560
Rank Name Score Visual
556 Xeon E-2134 4,813
+0.1%
557 Core i7-1185G7 4,813
+0.1%
558 Ryzen 3 4100 4,813
+0.1%
559 Core i7-8850H 4,811
+0%
560 Core i5-8259U 4,809
561 Core i7-9750HF 4,809
+0%
562 Xeon E-2244G 4,807
+-0%
563 Xeon E5-2643 v2 4,807
+-0%
564 Ryzen 5 PRO 4650U 4,807
+-0%
565 Core i3-9350KF 4,806
-0.1%

View full ranking →

Core i5-8259U Details

As of March 2026, the Intel Core i5-8259U remains a relevant mobile processor within the Coffee Lake-U family, though its position reflects the rapid evolution of modern computing. Released in April 2018, this 14 nm chip is now over seven years old, placing it firmly in the category of older mobile processors, yet it continues to hold a niche in low-power laptops and thin-and-light systems where efficiency and integrated graphics are prioritized. Designed for mobile use, the i5-8259U features a BGA1528 package and a 28 W TDP, making it suitable for compact systems with modest thermal constraints.

The Core i5-8259U is built on Intel’s Coffee Lake microarchitecture, featuring four cores and eight threads thanks to Hyper-Threading. It operates at a base frequency of 2.3 GHz and can boost up to 3.8 GHz, depending on workload and power conditions. With 6 MB of L3 cache and 1 MB of L2 cache, it provides a balanced cache hierarchy for its time, though modern processors now offer significantly larger caches and higher frequencies. It supports DDR4-2400 and LPDDR3-2133 memory over a dual-channel interface, delivering a maximum memory bandwidth of 38.4 GB/s, which was competitive in its era but now lags behind current standards.

One of the standout features of the i5-8259U is its integrated Iris Plus Graphics 655 GPU, which features 48 execution units and can reach a burst frequency of 1.05 GHz. This GPU supports up to three displays and offers decent performance for light gaming and multimedia tasks. It also includes Intel’s integrated graphics technology, enabling hardware-accelerated video decoding and encoding for formats like H.264 and HEVC. The processor supports a range of advanced technologies, including AVX, AVX2, AES-NI, Intel Speed Shift, Turbo Boost 2.0, and Intel VT-x and VT-d for virtualization.

In benchmark testing, the Core i5-8259U scores 5126 in the overall Passmark rating, placing it at #771 out of 2060 processors. Its single-core performance is stronger, with a score of 5342, ranking it #698, indicating solid performance for single-threaded applications. However, its multicore score of 4801 places it at #840, showing that while it holds its own in single-threaded workloads, it is outpaced by modern multi-core processors. The processor performs comparably to older desktop and mobile CPUs like the Core i5-4590 and Core i7-8559U but trails behind contemporary mobile and desktop offerings.

When viewed against the top 50 processors in each category, the i5-8259U is clearly positioned as a mid-tier mobile CPU from the late 2010s. While it remains capable for general productivity, web browsing, and light content creation, it is no longer suitable for demanding tasks such as 4K video editing or high-end gaming. Its strengths lie in power efficiency and integrated graphics, making it a viable option for budget-friendly laptops and ultrabooks where sustained performance is more important than raw power. As of 2026, the Core i5-8259U serves as a reminder of how far mobile computing has advanced, but it still holds a place in the ecosystem for users seeking reliable, low-power performance.
Frequently Compared

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Intel Core i5-8259U

Main Specifications

Designer: Intel
Name: Core i5-8259U
Family: Core
Series: i5-8000
Model Number: i5-8259U
Cores: 4
Threads: 8
Base Frequency: 2300 MHz
Turbo Frequency (1 core): 3800 MHz
Turbo Frequency (2 cores): 3800 MHz
Turbo Frequency (4 cores): 3600 MHz
Clock Multiplier: 23x (locked)
Microarchitecture: Coffee Lake
Core Name: Coffee Lake U
Core Family: 6
Core Model: 142
Socket: BGA1356
Package: FCBGA-1528
Chipset: 300
Target Segment: Mobile
Max CPUs: 1
TDP: 28 W
Release Price: $320.00

Cache Specifications

L1 Cache: 256 KiB
L1 Instruction Cache: 128 KiB (8-way set associative)
L1 Data Cache: 128 KiB (8-way set associative)
L2 Cache: 1 MiB (4-way set associative)
L3 Cache: 6 MiB (12-way set associative)

Memory Specifications

Supported Memory Type: DDR4-2400 and LPDDR3-2133
Memory Channels: 2
Maximum Memory: 32 GB
Maximum Bandwidth: 35.76 GB/s
ECC Support: No

PCI-Express Specifications

PCIe Revision: 3.0
PCIe Lanes: 16
PCIe Configuration: 1x4, 2x2, 1x2+2x1, 4x1

Integrated Graphics

GPU: Iris Plus Graphics 655
GPU Designer: Intel
GPU Max Frequency: 1050 MHz
Execution Units: 48

Physical Specifications

Process: 14 nm
Die Area: 123 mm²
Manufacturer: Intel
Technology: CMOS
Word Size: 64-bit
ISA: x86-64 (x86)

CPU Features

MMX EMMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX AVX2 ABM BMI1 BMI2 FMA3 AES RdRand ADX CLMUL F16C x86-16 x86-32 x86-64 Real Protected SMM FPU NX HT TBT 2.0 EIST SST TXT vPro VT-x VT-d EPT MPX SGX Secure Key SMEP IPT AVX-512 AVX512F AVX512CD AVX512BW AVX512DQ AVX512VL TSX VMD Flex Memory NM KPT PTT MBE Ctrl Run Sure Node Ctrlr MWT
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