At this time, December 2010, AMD Phenom II N870 is the fastest mobile microprocessor with three cores. The processor is based on enhanced K10 microarchitecture, and combines 4 cores (one of them is disabled), and DDR3-capable memory controller on one die. The N870 operates at 2.3 GHz, or 100 MHz and 200 MHz faster than earlier N850 and N830 models from the same family. The triple-core Phenom II employs two-level cache architecture, where each CPU core includes 128 KB level 1 and 512 KB level 2 caches. Being a high-performance microprocessor, the N870 includes all features that can be found in other Phenom II models:
- Accommodates full 128-bit Floating Point Unit, which results in better SSE performance
- Has increased memory bandwidth due to faster DDR3-1333 memory support. This ultimately translates into higher performance in memory-intensive applications.
- AMD64 instruction set extension allows this CPU to run 64-bit operating systems.
- Enhanced Virus Protection prevents computer virus infections by blocking certain types of exploits.
- Virtualization technology speeds up execution of user and system software in virtual environments.
AMD Phenom II N870 CPU contains PowerNow! technology, as well as several other low-power features, which, combined with processor's low frequency and presumably low core voltage, helps this model to achieve 35 Watt power rating. The Phenom II N870 is manufactured in 638-pin micro-PGA package, that requires socket S1. The processor fits all variations of socket S1, but works only in S1g4 revision of the socket.
Common perception "the most expensive processor performs the
best", which more often than not works for desktop CPUs, is not true
for mobile AMD microprocessors. While triple-core N870 will outrun
dual-core Phenom II or Turion II counterparts in multi-threaded
applications, they will not be as good in single- and dual-threaded
tasks, and you may end up not just wasting your money, but also getting
worse performance. Therefore, be careful when choosing this processor
for new laptop, or as an upgrade CPU for existing laptop. An easy way
to determine, whether the Phenom II X3 will work for you or not, is to
run your favorite applications on a multi-core computer, and watch
closely CPU usage for all cores. The Phenom II N870 should be good if
the system frequently uses more than two cores.
AMD Phenom II N870 specifications
|Type||CPU / Microprocessor|
|Family||AMD Phenom II Triple-Core Mobile|
|CPU part number|
|Stepping code||NADIC AD|
|Bus speed||One 1800 MHz 16-bit HyperTransport link|
|AMD Package number||30605|
|Socket||Socket S1 (S1g4)|
|Size||1.38" x 1.38" / 3.5cm x 3.5cm|
|Weight||0.2oz / 5.8g|
|Introduction date||Jan 4, 2011|
|Architecture / Microarchitecture|
|Manufacturing process||0.045 micron SOI|
|Data width||64 bit|
|The number of cores||3|
|The number of threads||3|
|Floating Point Unit||Integrated|
|Level 1 cache size||3 x 64 KB instruction caches|
3 x 64 KB data caches
|Level 2 cache size||3 x 512 KB|
|Level 3 cache size||None|
|Low power features||PowerNow!|
|Integrated peripherals / components|
|Other peripherals||HyperTransport technology 3.0|
|Electrical / Thermal parameters|
|Thermal Design Power||35 Watt|