Atom C3858

Details and Benchmarks for Intel Atom C3858

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Benchmark Results

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

Overall Score

Overall score for Atom C3858 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,250 Rank: 1599
Rank Name Score Visual
1595 Phenom 9600 4,251
+0%
1596 Core 2 Duo T9600 4,251
+0%
1597 A4-4020 4,251
+0%
1598 Celeron J4005 4,250
+0%
1599 Atom C3858 4,250
1600 Celeron J4105 4,249
+-0%
1601 Core i3-4010U 4,247
-0.1%
1602 Phenom II X4 B93 4,247
-0.1%
1603 Celeron 3865U 4,246
-0.1%
1604 Celeron N2820 4,246
-0.1%

View full ranking →

Multicore Score

Multicore performance score for Atom C3858 based on multi-threaded benchmark results.

4,789 Rank: 855
Rank Name Score Visual
851 Pentium Gold G4560 4,792
+0.1%
852 Core i3-7350K 4,792
+0.1%
853 Xeon E5-2670 4,792
+0.1%
854 Core i5-8250U 4,789
+0%
855 Atom C3858 4,789
856 Ryzen 7 PRO 2700U 4,789
+0%
857 Ryzen 3 PRO 1200 4,789
+0%
858 Core i7-4720HQ 4,788
+-0%
859 Xeon E3-1240L v5 4,787
+-0%
860 Core i5-4670 4,787
+-0%

View full ranking →

Singlecore Score

Single-core performance score for Atom C3858 based on single-threaded benchmark results.

3,890 Rank: 1838
Rank Name Score Visual
1834 Intel Pentium P6200 3,893
+0.1%
1835 V140 3,893
+0.1%
1836 Intel Core i3-350M 3,892
+0.1%
1837 Celeron B800 3,890
+0%
1838 Atom C3858 3,890
1839 Core i5-4200Y 3,887
-0.1%
1840 Pentium T4500 3,884
-0.2%
1841 Athlon 64 X2 5000+ 3,880
-0.3%
1842 A4-3305M 3,877
-0.3%
1843 Athlon 5350 3,877
-0.3%

View full ranking →

Workload Scores

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

Number Crunching

Aggregated score for Atom C3858 based on integer math, floating point math, and prime number computation benchmarks.

4,664 Rank: 778
Rank Name Score Visual
774 Core i7-8665U 4,665
+0%
775 Xeon E3-1225 v3 4,665
+0%
776 Xeon E3-1230 V2 4,665
+0%
777 Xeon Silver 4112 4,664
+0%
778 Atom C3858 4,664
779 Core i5-4690K 4,664
+0%
780 Core i7-7700HQ 4,663
+-0%
781 Core i5-6600K 4,663
+-0%
782 Core i7-3770S 4,663
+-0%
783 Xeon E3-1225 v6 4,662
+-0%

View full ranking →

Data Processing

Aggregated score for Atom C3858 based on data encryption, data compression, and string sorting benchmarks.

4,744 Rank: 614
Rank Name Score Visual
610 Core i7-6700K 4,748
+0.1%
611 Xeon E3-1270 v6 4,747
+0.1%
612 Core i5-8500B 4,745
+0%
613 Core i7-1068NG7 4,745
+0%
614 Atom C3858 4,744
615 Xeon Gold 5222 4,743
+-0%
616 Xeon E5-2630 v2 4,743
+-0%
617 Xeon X5690 4,741
-0.1%
618 Core i7-7700 4,740
-0.1%
619 Core i7-990X 4,739
-0.1%

View full ranking →

Physics & Compute

Aggregated score for Atom C3858 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,603 Rank: 955
Rank Name Score Visual
951 Core i7-2860QM 4,606
+0.1%
952 Core i5-3475S 4,605
+0%
953 Core i3-8121U 4,604
+0%
954 Xeon E5645 4,604
+0%
955 Atom C3858 4,603
956 Core i5-3340 4,603
+0%
957 Core i5-3330S 4,603
+0%
958 Core i7-2920XM 4,603
+0%
959 Core i7-975 4,603
+0%
960 Core i7-2820QM 4,602
+-0%

View full ranking →

Atom C3858 Details

Ranked #854 in multicore performance out of 2060 processors, the Intel Atom C3858 delivers a measured overall score of 4250, placing it firmly in the mid-tier of the performance spectrum. While not a contender for high-end computing, its performance is surprisingly competitive in its segment, particularly when considering its 25 W TDP and embedded market focus. As of March 2026, this processor, released years ago on a 14 nm process, remains relevant for specific low-power, high-efficiency applications where integrated features and thermal constraints are paramount.

Built on Intel's Goldmont microarchitecture, the Atom C3858 features a 12-core, 12-thread design with a base frequency of 2.0 GHz and a clock multiplier of 20. It supports both DDR3L-1600 and DDR4-2400 memory, with a maximum capacity of 262 GB and a peak bandwidth of 35.76 GiB/s across two channels. The processor includes 0.656 MiB of L1 cache (0.281 MiB for L1d, 0.375 MiB for L1i), 12 MiB of L2 cache, and no shared L3 cache. It operates within a 25 W TDP and uses the FCBGA-1310 package, typical for embedded and server-grade applications.

The Atom C3858 integrates Intel QuickAssist Technology, which accelerates data compression and encryption tasks, making it well-suited for network appliances and storage systems. It also supports advanced virtualization features such as Intel VT-x and VT-d, along with Extended Page Tables (EPT) and Intel Enhanced SpeedStep Technology for power management. The processor supports up to 20 PCIe 3.0 lanes, 16 SATA ports, and 8 USB ports, enhancing its connectivity for embedded environments.

In single-core performance, the C3858 achieves a score of 3890, ranking #1837 of 2060, indicating modest performance in tasks that rely heavily on per-core speed. This is consistent with its design philosophy, where efficiency and core count are prioritized over raw clock speed. Its multicore score of 4789 places it just ahead of several older Core i7 and i5 models, demonstrating its ability to scale across multiple threads in workloads like data processing and network tasks.

Despite being several years old, the Atom C3858 holds its ground in embedded and low-power server environments due to its robust feature set, including ECC memory support and integrated acceleration technologies. While it lags behind modern high-performance CPUs in both single-core and multicore benchmarks, its combination of efficiency, expandability, and reliability makes it a viable option for enterprise storage and network infrastructure where power consumption and thermal output are critical factors.
Frequently Compared

Intel Xeon Platinum 8270 25 views

Intel Core m5-6Y54 24 views

AMD EPYC 7702P 23 views

AMD Ryzen 9 PRO 3900 22 views

Intel Core i7-7700 21 views

Intel Xeon Silver 4109T 20 views

Intel Xeon Silver 4112 20 views

Intel Xeon Silver 4116T 20 views

AMD Ryzen 5 PRO 3500U 19 views

AMD Ryzen 3 PRO 2200GE 18 views

Intel Atom C3858

Main Specifications

Designer: Intel
Name: Atom C3858
Family: Atom
Series: 3000
Model Number: C3858
Cores: 12
Threads: 12
Base Frequency: 2000 MHz
Clock Multiplier: 20x (locked)
Microarchitecture: Goldmont
Core Name: Denverton
Core Family: 6
Core Model: 95
Package: FCBGA-1310
Target Segment: Embedded
Max CPUs: 1
TDP: 25 W
Release Price: $332.00

Cache Specifications

L1 Cache: 671.744 KiB
L1 Instruction Cache: 384 KiB (8-way set associative)
L1 Data Cache: 287.744 KiB (6-way set associative)
L2 Cache: 12 MiB (16-way set associative)

Memory Specifications

Supported Memory Type: DDR3L-1600 and DDR4-2400
Memory Channels: 2
Maximum Memory: 256 GB
Maximum Bandwidth: 35.76 GB/s
ECC Support: Yes

PCI-Express Specifications

PCIe Revision: 3.0
PCIe Lanes: 16
PCIe Configuration: x8, x4, x2, x1

Physical Specifications

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

CPU Features

MMX EMMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AES RdRand x86-16 x86-32 x86-64 Real Protected SMM FPU NX EIST VT-x VT-d EPT MPX SHA QAT
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