Phenom X4 9850B
AMD
PassMark
1,946
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 Phenom X4 9850B is manufactured by AMD. It was released in 2009-01-01. It is based on the Agena (2007−2008) architecture. It features 4 cores and 4 threads. Max frequency: 2.5 GHz. L3 cache: 2 MB (total). L2 cache: 512 kB (per core). Built on 65 nm process technology. Socket: AM2+. Thermal design power (TDP): 95 Watt. Passmark benchmark score: 1,946 points. Launch price was $149.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. 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
FPS Benchmarks
Predicted performance for Phenom X4 9850B across popular games. Tested paired with RTX 4090 to isolate CPU performance.
Apex Legends
Counter-Strike 2
Dead by Daylight
Delta Force
Garry's Mod
Honkai: Star Rail
League of Legends
Marvel Rivals
Minecraft
Path of Exile 2
Technical Analysis
Detailed breakdown of Phenom X4 9850B specifications and capabilities.
Processing Power
The Phenom X4 9850B is a 4-core / 4-thread processor based on the Agena (2007−2008) architecture, manufactured on a 65 nm process node. It reaches a maximum boost clock of 2.5 GHz— higher boost clocks directly translate to better single-threaded performance and responsiveness in gaming. It carries 2 MB (total) of L3 cache, plus 512 kB (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 1,946, placing it in the Entry Level performance tier as a Legacy generation product.
| Specification | Phenom X4 9850B |
|---|---|
| Cores / ThreadsPhysical/logical processing units | 4C / 4T |
| Max Boost ClockPeak single-core speed under boost | 2.5 GHz |
| ArchitectureCPU microarchitecture design | Agena (2007−2008) |
| Process NodeFabrication technology — smaller = more efficient | 65 nm |
| L3 CacheShared cache — reduces memory latency for all cores | 2 MB (total) |
| L2 CachePer-core fast cache for frequently accessed data | 512 kB (per core) |
| L1 CacheUltra-fast per-core cache | 128 kB (per core) |
| Die SizePhysical silicon area of the processor | 285 mm2 |
| Transistor CountMore transistors = more capabilities | 450 million |
| 64-bit Support | Yes |
| Windows 11 Compatible | No |
| PassMark ScoreOverall multi-threaded benchmark score | 1,946 |
Memory & Platform
The Phenom X4 9850B fits into the AM2+ socket and supports PCIe 2.0.
| Specification | Phenom X4 9850B |
|---|---|
| TypeDesktop or Laptop processor | desktop |
| SocketMotherboard socket required | AM2+ |
| PCIe GenerationPeripheral interconnect speed — affects GPU and SSD bandwidth | PCIe 2.0 |
| Max CPUs in ConfigMulti-socket support for servers | 1 |
Power & Cooling
The Phenom X4 9850B has a rated TDP (Thermal Design Power) of 95 Watt — this indicates the amount of heat generated under sustained load and determines what cooling solution is needed.
| Specification | Phenom X4 9850B |
|---|---|
| TDPThermal Design Power — heat output under sustained workload | 95 Watt |
Value Analysis
Performance ranking position: #2608 out of all indexed processors.
| Specification | Phenom X4 9850B |
|---|---|
| Launch PriceOriginal retail price at launch | $149 |
| Performance RankPosition in overall performance ranking | #2608 |
| Release DateLaunch date | 2009-01-01 |
| Release Year | 2008 |
| DesignerArchitecture designer (e.g. Intel, AMD) | AMD |
Specifications Reference
Raw spec sheet for quick lookup. The analysis cards above explain what these fields mean in practice.
3 categories
General Information
6 specs
General Information
6 specs
| Type | desktop |
| Designer | AMD |
| Launch Price | $149 |
| Release Date | 2009-01-01 |
| Architecture Codename | Agena (2007−2008) |
| Performance Ranking Position | 2608 |
Technical Specifications
11 specs
Technical Specifications
11 specs
| Cores | 4 |
| Threads | 4 |
| Die Size | 285 mm2 |
| L1 Cache | 128 kB (per core) |
| L2 Cache | 512 kB (per core) |
| L3 Cache | 2 MB (total) |
| Max Frequency | 2.5 GHz |
| 64-Bit Support | + |
| Transistor Count | 450 million |
| Process Technology | 65 nm |
| Windows 11 Compatible | - |
Compatibility
4 specs
Compatibility
4 specs
| Socket | AM2+ |
| PCIe Generation | PCIe 2.0 |
| Power Consumption (TDP) | 95 Watt |
| Max Processors In Config | 1 |
Similar Performance
Processors with benchmark scores closest to the current hardware, grouped by manufacturer.
Intel (8)
AMD (8)
Our Recommendation for Phenom X4 9850B
Suggested pairings based on performance balance
Minimum (Avoid Bottleneck) (12)
Recommended (Balanced) (12)
High-End (Max Performance) (12)
Popular Comparisons
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