Phenom X4 9850B vs Phenom II X3 P820
Aggregate performance score
Phenom X4 9850B outperforms Phenom II X3 P820 by an impressive 86% based on our aggregate benchmark results.
Primary details
Comparing Phenom II X3 P820 and Phenom X4 9850B processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2740 | 2315 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | 3x AMD Phenom II | no data |
| Power efficiency | 2.50 | 1.23 |
| Architecture codename | Champlain (2010−2011) | Agena (2007−2008) |
| Release date | 12 May 2010 (14 years ago) | August 2008 (16 years ago) |
Detailed specifications
Phenom II X3 P820 and Phenom X4 9850B basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 3 (Tri-Core) | 4 (Quad-Core) |
| Threads | 3 | 4 |
| Boost clock speed | 1.8 GHz | 2.5 GHz |
| Bus rate | 3600 MHz | no data |
| L1 cache | 384 KB | 128 KB (per core) |
| L2 cache | 1.5 MB | 512 KB (per core) |
| L3 cache | no data | 2 MB (shared) |
| Chip lithography | 45 nm | 65 nm |
| Die size | no data | 285 mm2 |
| Number of transistors | no data | 450 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Phenom II X3 P820 and Phenom X4 9850B compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | no data | 1 |
| Socket | S1 | AM2+ |
| Power consumption (TDP) | 25 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X3 P820 and Phenom X4 9850B. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Virtualization, AMD64, Advanced Virus Protection, SSE(1,2,3,4a) | no data |
| VirusProtect | + | - |
Virtualization technologies
Virtual machine speed-up technologies supported by Phenom II X3 P820 and Phenom X4 9850B are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X3 P820 and Phenom X4 9850B. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | no data |
Pros & cons summary
| Performance score | 0.66 | 1.23 |
| Physical cores | 3 | 4 |
| Threads | 3 | 4 |
| Chip lithography | 45 nm | 65 nm |
| Power consumption (TDP) | 25 Watt | 95 Watt |
Phenom II X3 P820 has a 44.4% more advanced lithography process, and 280% lower power consumption.
Phenom X4 9850B, on the other hand, has a 86.4% higher aggregate performance score, and 33.3% more physical cores and 33.3% more threads.
The Phenom X4 9850B is our recommended choice as it beats the Phenom II X3 P820 in performance tests.
Be aware that Phenom II X3 P820 is a notebook processor while Phenom X4 9850B is a desktop one.
Should you still have questions on choice between Phenom II X3 P820 and Phenom X4 9850B, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
