A8-3870K

Details and Benchmarks for AMD A8-3870K

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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 A8-3870K based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,312 Rank: 1511
Rank Name Score Visual
1507 Core i3-540 4,313
+0%
1508 A10-9620P 4,312
+0%
1509 A4-6300 4,312
+0%
1510 Core 2 Duo E8500 4,312
+0%
1511 A8-3870K 4,312
1512 Phenom II X2 B57 4,312
+0%
1513 Athlon II X2 260 4,311
+-0%
1514 Pentium E5700 4,311
+-0%
1515 Core 2 Duo T9900 4,310
+-0%
1516 Pentium G620 4,309
-0.1%

View full ranking →

Multicore Score

Multicore performance score for A8-3870K based on multi-threaded benchmark results.

4,479 Rank: 1269
Rank Name Score Visual
1265 A10-9630P 4,482
+0.1%
1266 Core i5-7Y54 4,480
+0%
1267 A8-9600 4,480
+0%
1268 Core i7-2635QM 4,479
+0%
1269 A8-3870K 4,479
1270 Phenom II X4 830 4,478
+-0%
1271 Pentium B970 4,477
+-0%
1272 A10-7800 4,477
+-0%
1273 Pentium J6426 4,477
+-0%
1274 Xeon D-1602 4,476
-0.1%

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Singlecore Score

Single-core performance score for A8-3870K based on single-threaded benchmark results.

4,200 Rank: 1573
Rank Name Score Visual
1569 Athlon II X3 435 4,208
+0.2%
1570 Xeon 5160 4,208
+0.2%
1571 A10-5757M 4,203
+0.1%
1572 Core 2 Duo E7400 4,201
+0%
1573 A8-3870K 4,200
1574 Phenom II X3 B75 4,200
+0%
1575 Pentium Silver N5000 4,199
+-0%
1576 Intel Core i7-640LM 4,199
+-0%
1577 Athlon II X2 B24 4,199
+-0%
1578 Pentium E5500 4,199
+-0%

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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 A8-3870K based on integer math, floating point math, and prime number computation benchmarks.

4,529 Rank: 1314
Rank Name Score Visual
1310 Celeron G3930 4,529
+0%
1311 Phenom II X4 B45 4,529
+0%
1312 Pentium G3250T 4,529
+0%
1313 Core i5-660 4,529
+0%
1314 A8-3870K 4,529
1315 Athlon Silver 7120U 4,529
+0%
1316 Celeron G4900T 4,528
+-0%
1317 A8-3850 4,528
+-0%
1318 Phenom II X4 920 4,528
+-0%
1319 Core i5-661 4,528
+-0%

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Data Processing

Aggregated score for A8-3870K based on data encryption, data compression, and string sorting benchmarks.

4,535 Rank: 1133
Rank Name Score Visual
1129 A10-5800K 4,535
+0%
1130 A8-7650K 4,535
+0%
1131 Phenom II X4 940 4,535
+0%
1132 Phenom II X4 840T 4,535
+0%
1133 A8-3870K 4,535
1134 Core i3-8130U 4,534
+-0%
1135 Core i7-4610M 4,534
+-0%
1136 Xeon L5520 4,534
+-0%
1137 Xeon E5472 4,534
+-0%
1138 Core i7-6650U 4,533
+-0%

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Physics & Compute

Aggregated score for A8-3870K based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,511 Rank: 1336
Rank Name Score Visual
1332 Celeron G3950 4,511
+0%
1333 Xeon E5462 4,511
+0%
1334 A10-6700T 4,511
+0%
1335 Celeron G1630 4,511
+0%
1336 A8-3870K 4,511
1337 Core i3-2370M 4,510
+-0%
1338 Xeon X5450 4,510
+-0%
1339 A10-9620P 4,510
+-0%
1340 A8-3820 4,510
+-0%
1341 Celeron G4930T 4,509
+-0%

View full ranking →

A8-3870K Details

Launched in December 2011, the AMD A8-3870K is a desktop processor built on the Llano architecture, representing a significant step in AMD's integration of CPU and GPU technologies. With a 32 nm process node and a die area of 228 mm², the chip features 1.178 billion transistors and is fabricated by GlobalFoundries, a move that reflects AMD's shift toward outsourcing manufacturing. Despite its age, the A8-3870K remains notable for its unlocked multiplier, which allows for straightforward overclocking—a rare feature in its class at the time. This makes it a compelling option for enthusiasts on a budget, even as the technology landscape has evolved dramatically since its release.

The A8-3870K features four cores operating at a base frequency of 3.0 GHz, with no simultaneous multithreading support, resulting in a 4-core, 4-thread configuration. It includes 0.122 MiB of L1 cache and 0.954 MiB of L2 cache per core, totaling 4 MiB of L2 cache. The processor supports DDR3 memory with a dual-channel interface, reaching a rated speed of 1866 MT/s, though higher speeds are possible with overclocking. Memory bandwidth is capped at 29.9 GB/s, a limitation compared to modern standards but typical for its era. The chip operates at a TDP of 100 W, requiring robust cooling, particularly when overclocked.

One of the A8-3870K’s defining characteristics is its integrated Radeon HD 6550D graphics. This GPU features 256 shaders and a max frequency of 600 MHz, capable of driving up to three displays. While not suitable for modern gaming, it provided decent multimedia performance for its time and allowed for basic graphics tasks without a discrete GPU. The processor also supports AMD-V virtualization, enhancing virtual machine performance, and includes a suite of instruction sets such as SSE, SSE2, SSE3, SSE4a, and 3DNow!, ensuring compatibility with a wide range of software.

In benchmark testing, the A8-3870K scores 4312 in the Overall Score, placing it at #1508 out of 2060 processors. Its Singlecore Score of 4200 ranks it #1573, while its Multicore Score of 4479 places it at #1268. These results indicate that while the processor holds up reasonably well in single-threaded workloads, its multicore performance is more competitive. It outperforms several older Intel Pentium and Athlon models but trails behind modern processors in both single- and multicore performance. In the top 50 lists, the A8-3870K falls far behind current leaders like the Ryzen Threadripper PRO 9995WX and Core Ultra 9 285K, highlighting the generational gap.

As of March 2026, the A8-3870K is best suited for legacy systems, retro computing, or budget builds where integrated graphics and overclocking flexibility are priorities. While it lacks the performance and efficiency of modern CPUs, its historical significance and unlocked potential make it a nostalgic yet functional choice for hobbyists and collectors.
Frequently Compared

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AMD Ryzen 5 3600 32 views

Intel Celeron G530 31 views

AMD EPYC 7402 30 views

Intel Core i7-4720HQ 30 views

AMD Ryzen 3 PRO 2200GE 29 views

AMD A6-3620 29 views

AMD Ryzen Threadripper 1900X 29 views

AMD Ryzen 5 3500X 28 views

AMD Ryzen 9 PRO 3900 26 views

AMD A8-3870K

Main Specifications

Designer: AMD
Name: A8-3870K
Cores: 4
Threads: 4
Base Frequency: 3000 MHz
Clock Multiplier: 30x (unlocked)
Core Name: Llano
Socket: Socket FM1
Package: µPGA
Target Segment: Desktop
TDP: 100 W

Cache Specifications

L1 Cache: 124.928 KiB
L2 Cache: 0.954 MiB

Memory Specifications

Supported Memory Type: DDR3

Physical Specifications

Process: 32 nm
Die Area: 228 mm²
Manufacturer: GlobalFoundries

CPU Features

MMX SSE SSE2 SSE3 SSE4a AMD-V 3DNow!
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