Celeron B840

Details and Benchmarks for Intel Celeron B840

Sysbuilds Alpha Stage!

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 Celeron B840 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,205 Rank: 1670
Rank Name Score Visual
1666 Xeon D-1518 4,209
+0.1%
1667 Xeon E5606 4,208
+0.1%
1668 Pentium 2127U 4,207
+0%
1669 Athlon 7750 4,206
+0%
1670 Celeron B840 4,205
1671 Xeon E5506 4,204
+-0%
1672 Athlon II X3 425 4,204
+-0%
1673 A6-3650 4,203
+-0%
1674 Core 2 Duo T9400 4,203
+-0%
1675 Core 2 Duo P8700 4,203
+-0%

View full ranking →

Multicore Score

Multicore performance score for Celeron B840 based on multi-threaded benchmark results.

4,456 Rank: 1312
Rank Name Score Visual
1308 Core M 5Y70 4,457
+0%
1309 Core i5-5300U 4,457
+0%
1310 Core i7-4500U 4,457
+0%
1311 Core i5-3427U 4,457
+0%
1312 Celeron B840 4,456
1313 Athlon II X3 460 4,456
+0%
1314 Core i5-5250U 4,455
+-0%
1315 Xeon X3220 4,455
+-0%
1316 Core i3-3225 4,453
-0.1%
1317 Pentium G3430 4,453
-0.1%

View full ranking →

Singlecore Score

Single-core performance score for Celeron B840 based on single-threaded benchmark results.

4,037 Rank: 1741
Rank Name Score Visual
1737 A6-4400M 4,042
+0.1%
1738 Core 2 Duo T6400 4,041
+0.1%
1739 E2-9010 4,039
+0%
1740 Xeon E7-4830 4,037
+0%
1741 Celeron B840 4,037
1742 A6-3420M 4,037
+0%
1743 A8-5545M 4,035
+-0%
1744 Phenom II X4 910 4,035
+-0%
1745 Core 2 Duo E4500 4,034
-0.1%
1746 Core i5-8200Y 4,030
-0.2%

View full ranking →

Workload Scores

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

Number Crunching

Aggregated score for Celeron B840 based on integer math, floating point math, and prime number computation benchmarks.

4,493 Rank: 1586
Rank Name Score Visual
1582 Pentium N3530 4,494
+0%
1583 Athlon II X3 400e 4,494
+0%
1584 Celeron N4000 4,493
+0%
1585 Celeron 3965Y 4,493
+0%
1586 Celeron B840 4,493
1587 Pentium E6800 4,493
+0%
1588 Phenom II X2 550 4,493
+0%
1589 Pentium E6500 4,493
+0%
1590 A6-3410MX 4,493
+0%
1591 A6-3400M 4,493
+0%

View full ranking →

Data Processing

Aggregated score for Celeron B840 based on data encryption, data compression, and string sorting benchmarks.

4,452 Rank: 1645
Rank Name Score Visual
1641 A4-9120 4,453
+0%
1642 Celeron 3855U 4,452
+0%
1643 Core i3-2377M 4,452
+0%
1644 Celeron 3965Y 4,452
+0%
1645 Celeron B840 4,452
1646 A6-9210 4,452
+0%
1647 Pentium 2127U 4,452
+0%
1648 Pentium T4500 4,452
+0%
1649 Celeron 2980U 4,452
+0%
1650 A6-1450 4,452
+0%

View full ranking →

Physics & Compute

Aggregated score for Celeron B840 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,480 Rank: 1536
Rank Name Score Visual
1532 Xeon E3110 4,481
+0%
1533 A6-3410MX 4,481
+0%
1534 A6-3400M 4,481
+0%
1535 Core i3-350M 4,481
+0%
1536 Celeron B840 4,480
1537 Athlon II X3 425 4,480
+0%
1538 Pentium 2127U 4,480
+0%
1539 A8-3550MX 4,480
+0%
1540 Celeron 3855U 4,479
+-0%
1541 Core i3-2365M 4,479
+-0%

View full ranking →

Celeron B840 Details

As of March 2026, the Intel Celeron B840 remains a relic of the early Sandy Bridge era, a mobile processor launched in July 2011 that represents a bygone age in computing. Despite its age, it still holds a place in the broader performance landscape due to its modest yet functional specifications. Built on a 32 nm process and based on the Sandy Bridge microarchitecture, the Celeron B840 is designed for entry-level mobile systems, offering a balance of power efficiency and basic performance at a time when integrated graphics were beginning to play a more significant role in mainstream computing.

The processor features two cores and two threads, with a base clock of 1.9 GHz and a locked multiplier that prevents overclocking. It operates on a Socket G2 (rPGA988B) platform and is part of the Celeron lineup, which targets budget-conscious users. Its thermal design power (TDP) of 35 W ensures low power consumption, making it suitable for lightweight laptops and netbooks. The Celeron B840 supports dual-channel DDR3-1333 and DDR3-1066 memory, with a maximum capacity of 16 GB and a peak memory bandwidth of 19.87 GiB/s. It includes 2 MB of L3 cache, 0.5 MB of L2 cache, and 0.125 MiB of L1 cache, distributed across its two cores.

Integrated into the chip is the Intel HD Graphics (Sandy Bridge) GPU, which features six execution units and a base frequency of 650 MHz, capable of reaching up to 1000 MHz in burst mode. This GPU supports dual display outputs and provides basic graphics acceleration, suitable for office tasks, web browsing, and light multimedia playback. The processor also includes support for a range of Intel technologies, including Intel Enhanced SpeedStep, Intel Flex Memory Access, and Intel VT-x, enhancing virtualization and power management capabilities.

In benchmark testing, the Celeron B840 achieves an Overall Score of 4205, ranking #1670 out of 2060 processors, with a Singlecore Score of 4037 (#1740) and a Multicore Score of 4456 (#1312). These results place it behind modern processors like the Core i5-5300U and Core i7-4500U, which share similar core counts but benefit from more advanced architectures and higher clock speeds. However, it outperforms older dual-core CPUs such as the Core 2 Duo T6400 and the Pentium G3430 in single-threaded workloads. Its performance is constrained by its age and lack of modern instruction set support beyond AVX2, limiting its relevance in today’s computing environment.

The Celeron B840 is best suited for legacy systems, light productivity tasks, or as a replacement in older laptops where performance and power efficiency are more critical than raw speed. While it has been surpassed by decades of technological advancement, its enduring presence in the benchmark data highlights the longevity of Intel’s mobile processor designs from the early 2010s. For users seeking a capable system without a discrete GPU, the B840 still offers a functional, if outdated, solution.
Frequently Compared

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Intel Core i9-9820X 6 views

AMD Ryzen 9 PRO 3900 3 views

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Intel Xeon Silver 4214 1 view

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Intel Xeon Silver 4110 1 view

Intel Celeron B840

Main Specifications

Designer: Intel
Name: Celeron B840
Family: Celeron
Series: 800
Model Number: B840
Cores: 2
Threads: 2
Base Frequency: 1900 MHz
Clock Multiplier: 19x (locked)
Microarchitecture: Sandy Bridge
Core Name: Sandy Bridge M
Core Family: 6
Core Model: 42
Socket: Socket
Package: rPGA988B
Chipset: Cougar
Target Segment: Mobile
Max CPUs: 1
TDP: 35 W
Release Price: $86.00

Cache Specifications

L1 Cache: 128 KiB
L1 Instruction Cache: 64 KiB (8-way set associative)
L1 Data Cache: 64 KiB (8-way set associative)
L2 Cache: 0.5 MiB (8-way set associative)
L3 Cache: 2 MiB (8-way set associative)

Memory Specifications

Supported Memory Type: DDR3-1333 and DDR3-1066
Memory Channels: 2
Maximum Memory: 16 GB
Maximum Bandwidth: 19.87 GB/s
ECC Support: No

PCI-Express Specifications

PCIe Revision: 2.0
PCIe Lanes: 16
PCIe Configuration: 1x16, 2x8, 1x8+2x4

Integrated Graphics

GPU: HD
GPU Designer: Intel
GPU Max Frequency: 1000 MHz
Execution Units: 6

Physical Specifications

Process: 32 nm
Die Area: 131 mm²
Transistor Count: 0.50 billion
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 BMI1 BMI2 FMA3 AES CLMUL F16C x86-16 x86-32 x86-64 Real Protected SMM FPU NX HT TBT 2.0 EIST TXT VT-x TSX Flex Memory FMA
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