Intel’s excellent and immensely overclockable Pentium G6950 retails for around £15 less than the X4 645 and while it may only be a dual-core chip, the fact that it’s based on the Clarkdale die design means it’s able to process more instructions per clock (IPC) per core than the X4 645. The lack of 元 cache helps AMD produce Athlon IIs at budget prices.Īt £94 the X4 645 has plenty of competition. The X4 645 also still lacks the large pool of Level 3 cache that AMD’s Phenom II line of processors enjoys. AMD also claims to have implemented a raft of more subtle tweaks and changes, but the fact that both the chips are based on the C3 stepping of the Propus die indicates that these changes are minor.Īs a result, the X4 645 is still made with the same 45nm SOI process as the X4 640 and retains the same 128KB of Level 1 cache and 512KB of Level 2 cache per core. The headline improvement is the addition of an extra 100MHz of frequency, meaning the 645 runs at an impressive 3.1GHz, making it AMD’s fastest quad-core Athlon chip. Enhanced virus protection acts as a preventative measure causing viruses to be localized, short-lived, and non-contagious, eventually being flushed from system memory.One such CPU is the AMD Athlon II X4 645, a quad-core chip that's modeled on the Athlon II X4 640.

Enhanced Virus ProtectionAll AMD processors equipped with AMD64 technology are Enhanced Virus Protection-enabled.

AMD Cool'n'Quiet TechnologyAMD's Cool'n'Quiet technology is an innovative solution available on AMD Athlon 64 processor-based systems that can effectively lower power consumption and enable a quieter-running system while delivering performance-on-demand.

With HT 3.0 technology the AMD Athlon II X4 620 processor enjoys 4000MHz system bus speeds.

HyperTransport 3.0 TechnologyHyperTransport Technology (HT or HTT) is a high-speed, low latency, point-to-point link designed to increase communication speeds between integrated circuits in computers, servers, embedded systems, and networking and telecommunications equipment.The integrated memory controller changes the way the processor accesses main memory, resulting in increased bandwidth, reduced memory latencies, and enhanced processor performance. Integrated DDR2 and DDR3 DRAM Memory ControllerThe AMD Athlon II X4 620 quad-core processor is integrated with DDR2 and DDR3 DRAM memory controller capable of supporting unregistered DRAM.With Quad-core technology, four complete processor cores on a single die run at the same frequency to deliver exceptional multi-tasking power, allowing users to surge through the most demanding processing loads, including advanced multitasking, critical business productivity, complicated visual design and modeling, serious gaming, and visually stunning digital media and entertainment. AMD64 Quad-core TechnologyAMD64 is designed to enable simultaneous 32- and 64-bit computing with no degradation in performance.

Athlon ii x4 640 benchmark