AMD® A8-3820 APU

The AMD A8-3820 APU is a desktop processor with 4 cores and 4 threads (32 nm process). It launched in Dec 2011. Clocks run from 2.5 GHz base to 2.8 GHz boost. It supports DDR3 memory. It uses the FM1 socket. Rated TDP is 65 W.

The AMD A8-3820 APU scores 1,127 in single-core performance and 2,181 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 1,568 for overall performance, 2,995 for productivity performance, 3,228 for creator performance, 2,099 for engineering performance and 3,926 for gaming performance. Its multi-core throughput works out to 545 per core, 545 per thread and 34 per watt. Its computed efficiency index is 195. Its performance index is 19, so its overall performance is 81% below the Intel Core i5-12400 (index 100). Each bar shows the score as a share of a reference ceiling, which is the larger of the 99th-percentile score across the Feex CPU database and a fixed baseline.

Scores for individual PassMark CPU Mark test categories. Higher is better. These are measured test scores, not computed from the single-core and multi-core ratings.

In the individual workload tests the AMD A8-3820 APU scores 6,407 in integer math, 5,010 in floating-point math, 46,497 in compression, 568 in cryptography, 202 in physics simulation, 1,160 in vector SIMD, 11 in the prime sieve and 5,778 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 89% below in integer math, 89% below in floating-point math, 80% below in compression, 95% below in cryptography, 81% below in physics simulation, 93% below in vector SIMD, 84% below in the prime sieve and 74% below in sorting. Each bar shows the score as a share of that workload's reference ceiling, the larger of the 99th-percentile score across CPUs with a recorded value and a fixed baseline.

The AMD A8-3820 APU has 4 physical cores and runs 4 logical threads. It does not use a hybrid performance and efficiency core layout. It does not support simultaneous multithreading, so its thread count equals its core count. It runs at a base clock of 2.50 GHz and boosts up to 2.80 GHz.

The AMD A8-3820 APU is a desktop processor, belongs to the AMD A-Series family and is manufactured on a 32 nm process. It launched in Dec 2011.

The AMD A8-3820 APU has 512 KB of L1 cache and 4 MB of L2 cache. That adds up to about 4.5 MB of cache, or 1.13 MB per core. Each core has 1 MB of private L2 cache.

The AMD A8-3820 APU has a 2-level cache hierarchy: L1 at 512 KB and L2 at 4 MB. L2 is the largest level and makes up about 89% of the cache listed here.

The AMD A8-3820 APU supports DDR3 memory and runs memory at up to 1,866 MT/s. It does not support DDR5, DDR4 and LPDDR memory.

The AMD A8-3820 APU includes integrated graphics (HD 6550D) and clocks the graphics up to 0.60 GHz.

The AMD A8-3820 APU uses the FM1 socket.

The AMD A8-3820 APU has a rated TDP of 65 W.

Instruction sets, security, virtualization, AI acceleration and OS readiness. Features are listed as supported, explicitly not supported, or not recorded; a feature that is not recorded is not the same as unsupported.

Feex has recorded 51% of the specifications it tracks for the AMD A8-3820 APU. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Efficiency Cores, All-Core Boost and Unlocked Multiplier. Architecture & Generation: Codename, ISA Family and Market Status. Cache: L4 Cache. Memory Support: Memory Channels, Memory Bandwidth and ECC Memory. Graphics: Graphics Base Clock, Execution Units, Display Outputs and Max Video Memory. Platform & Compatibility: Package, Package Size and PCIe Lanes. Power & Thermals: Base Power, Maximum Turbo Power, Configurable TDP (Min), Configurable TDP (Max), Max Junction Temperature and Tcase. Physical & Manufacturing: Transistor Count, Die Size, Die Count, Foundry and Launch Price. Naming & Aliases: SKU, Model Number, Processor Number and Part Number.

Processors that use the same FM1 socket as the AMD A8-3820 APU and have the closest multi-core scores in the Feex database include AMD Athlon II X4 631, AMD Athlon II X4 638, AMD A6-3650 APU, AMD A8-3800 APU and AMD Athlon II X4 641.