All of the processors shown have extended memory.
Extended Memory 64 Technology
(EM64T) or Extended Memory 64 Technology
L3 cache
L3 cache
Dual Core
AMD anthlon x2 dual core. AMD has more quality. Much faster and hold more space/memory. INTEL are OK, but bad. anything AMD is ALOT better!
•Multi-core processor•Dual-core processor•Quad-core processor
L2 cache. Today's processors all have some memory on the processor chip (called a die). Memory on the processor die is called Level 1 cache (L1 cache). Memory in the processor package, but not on the processor die, is called Level 2 cache (L2 cache). Some processors use a third cache farther from the processor core, but still in the processor package, which is called Level 3 cache (L3 cache).
Memory is more important than the type of processor. Unless you are about to run programs like photoshop or premier pro or in Apple's case, Final Cut Pro, then you probably want the Core i5. A memory upgrade is easy and it is cheap. Do it yourself instead of letting the factory install it for you. It will save you a good amount of money. But for most people, Core i3 with 6 GB of memory is better. For more answers like this, go to jamesrealtech.com
sempron is not a dual core processor.
A processor, or more commonly a CPU, is an individualized processing device. It may contain multiple cores. A core is a bank of registers and dedicated cache structure that performs all of a processor's tasks, but is not an entire processor. For example, more multi-core processors have a separate array of logic functions that are not integrated with the core, such as the Memory Controller in AMD Phenom and Phenom II processors. There is one (or two, in the Phenom II) memory controllers total for the processor, reguardless of the number of cores. Think of a 'core' as a cylinder in an engine. A V8 enginer has 4 'cores', but the engine is the 'processor'. You can have a V12 or a W32 or a V4 or any of another combination, but there's only one processor. However the number of cores can greatly influence the overall power and capability of the processor.
There are Celeron dual core processors today. However, just because you have Celeron processor, it does not mean your Celeron processor is a dual core processor. The easiest way to tell is to look at the Intel sticker on your computer. If it says "Dual Core," then it is dual core. If it does NOT say "Dual Core," then it is not dual core.