A8-3870K
AMD
PassMark
2,360
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Overview
The A8-3870K is manufactured by AMD. It was released in 2014-01-01. It is based on the Llano (2011−2012) architecture. It features 4 cores and 4 threads. Base frequency is 3 GHz, with boost up to 3 GHz. L3 cache: 0 kB. L2 cache: 1 MB (per core). Built on 32 nm process technology. Socket: FM1. Thermal design power (TDP): 100 Watt. Memory support: DDR3. Passmark benchmark score: 2,360 points. Launch price was $90.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. The A8-3870K is positioned at rank #502 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar A8-3870K
FPS Benchmarks
Predicted performance for A8-3870K across popular games. Tested paired with RTX 4090 to isolate CPU performance.
Path of Exile 2
Counter-Strike 2
League of Legends
Valorant
Technical Analysis
Detailed breakdown of A8-3870K specifications and capabilities.
Processing Power
The A8-3870K is a 4-core / 4-thread processor based on the Llano (2011−2012) architecture, manufactured on a 32 nm process node. It reaches a maximum boost clock of 3 GHz from a base frequency of 3 GHz— higher boost clocks directly translate to better single-threaded performance and responsiveness in gaming. It carries 0 kB of L3 cache, plus 1 MB (per core) of L2 cache and 128 kB (per core) of L1 cache per core. In the PassMark benchmark (a comprehensive multi-threaded test), it scores 2,360, placing it in the Entry Level performance tier as a Legacy generation product. Geekbench 6 single-core (the most relevant metric for gaming FPS) records 380.
| Specification | A8-3870K |
|---|---|
| Cores / ThreadsPhysical/logical processing units | 4C / 4T |
| Max Boost ClockPeak single-core speed under boost | 3 GHz |
| Base ClockGuaranteed minimum operating frequency | 3 GHz |
| ArchitectureCPU microarchitecture design | Llano (2011−2012) |
| Process NodeFabrication technology — smaller = more efficient | 32 nm |
| L3 CacheShared cache — reduces memory latency for all cores | 0 kB |
| L2 CachePer-core fast cache for frequently accessed data | 1 MB (per core) |
| L1 CacheUltra-fast per-core cache | 128 kB (per core) |
| Die SizePhysical silicon area of the processor | 228 mm2 |
| Transistor CountMore transistors = more capabilities | 1,178 million |
| 64-bit Support | Yes |
| Windows 11 Compatible | No |
| Unlocked MultiplierWhether the CPU can be overclocked | Yes (Overclockable) |
| PassMark ScoreOverall multi-threaded benchmark score | 2,360 |
| Geekbench 6 SingleSingle-core performance — most relevant for gaming | 380 |
Memory & Platform
The A8-3870K fits into the FM1 socket and supports PCIe 2.0 with 20 total PCIe lanes for expansion cards and storage. It supports DDR3 memory at speeds up to DDR3-1866 (faster RAM improves bandwidth-sensitive workloads), with a maximum capacity of 32 GB across 2 channels (dual-channel doubles bandwidth). Integrated graphics: Radeon HD 6550D — allows display output without a dedicated GPU, useful for troubleshooting and light tasks.
| Specification | A8-3870K |
|---|---|
| TypeDesktop or Laptop processor | desktop |
| SocketMotherboard socket required | FM1 |
| PCIe GenerationPeripheral interconnect speed — affects GPU and SSD bandwidth | PCIe 2.0 |
| PCIe LanesTotal available lanes for GPUs, NVMe drives, and expansion | 20 |
| RAM TypeSupported memory standard | DDR3 |
| Max RAM SpeedMaximum officially supported memory frequency | DDR3-1866 |
| Max RAM CapacityMaximum installable memory | 32 GB |
| RAM ChannelsDual-channel doubles bandwidth vs single-channel | 2 |
| ECC SupportError-Correcting Code memory — prevents data corruption | No |
| Integrated GPUBuilt-in graphics processor | Radeon HD 6550D |
| Compatible ChipsetsMotherboard chipsets that support this CPU | A55,A75 |
| Max CPUs in ConfigMulti-socket support for servers | 1 |
Advanced Features
The A8-3870K is primarily designed for Budget Gaming Desktop. It features an unlocked multiplier, allowing enthusiasts to overclock beyond stock frequencies for additional performance. Virtualization: AMD-V — enables running virtual machines efficiently (important for development and server workloads). Its primary market competitor is the Core i3-2125.
| Specification | A8-3870K |
|---|---|
| Primary Use CaseIntended workload category | Budget Gaming Desktop |
| OverclockingWhether CPU clock can be manually increased | ✅ Unlocked |
| AVX-512Advanced vector instructions for AI/ML workloads | ❌ Not Supported |
| VirtualizationHardware-assisted virtualization technology | AMD-V |
| Direct CompetitorMarket equivalent from rival manufacturer | Core i3-2125 |
Power & Cooling
The A8-3870K has a rated TDP (Thermal Design Power) of 100 Watt — this indicates the amount of heat generated under sustained load and determines what cooling solution is needed. It ships with the Yes stock cooler. Recommended cooling: Stock.
| Specification | A8-3870K |
|---|---|
| TDPThermal Design Power — heat output under sustained workload | 100 Watt |
| Included CoolerStock cooler bundled in the box | Yes |
| Recommended CoolerSuggested aftermarket cooling solution | Stock |
Value Analysis
It currently holds Rank #502 in the overall cost-benefit ranking — this ranking factors in performance-per-dollar relative to all available processors. Performance ranking position: #2440 out of all indexed processors.
| Specification | A8-3870K |
|---|---|
| Launch PriceOriginal retail price at launch | $90 |
| Cost-Benefit RankPosition in overall value ranking | #502 |
| Performance RankPosition in overall performance ranking | #2440 |
| Release DateLaunch date | 2014-01-01 |
| Release Year | 2011 |
| DesignerArchitecture designer (e.g. Intel, AMD) | AMD |
Similar Performance
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Our Recommendation for A8-3870K
Suggested pairings based on performance balance
Minimum (Avoid Bottleneck) (12)
Recommended (Balanced) (12)
High-End (Max Performance) (12)
Popular Comparisons
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