Not the same.
CPUs do have a cache (either L1, L2 or L3), but cache is not exclusively on the CPU.
L3 Cache
L3 cache
L3 cache
L1, L2, and L3
The Level 3 (L3) cache has the highest latency. The CPU cache is memory that is used to decrease the time that it takes the CPU to access data. Because the data is cached, it can be accessed more quickly. The CPU cache is often found directly on the CPU or built into the CPU. The L3 cache is usually larger than the L1 and L2 cache, but it is searched last. The CPU searches for data in the following order: L1 cache, L2 cache, L3 cache, RAM.
L3 cache is located on the motherboard or in CPU housing.Hope this help.
No the registry is a place in the processor that does the commands and the math. Cache is where data is stored temporarily so the CPU can access it quickly. There is L1, L2 and L3 cache. Depending on the speed of the processor and the amount of RAM all processors these days have at least L1 cache.
Processors have internal memory-- In the form of the 3 L's. L1 Cache - Usually a very small amount, like 32-128kb, this is the fastest cache, and used to store very small strings of data for immediate use. L2 Cache - The heavy lifter of a processor-- Usually 1-2MB per core. This cache stores more complex values and helps with prioritization of workloads. L3 Cache - Relatively new in the processing world, L3 caches are larger, slower banks of memory in the upwards of 12-18MB used for basically anything not covered by the first 2 caches. If you mean internal memory as in RAM, a processor will not work without RAM.
It uses L1 L2 and L3.
Because those cache memories are super fast and super expensive. (same applies for SSD and HDD hard disks..)
Some RISC server CPU designs have had L3 for many years. The first consumer CPU that could use an L3 was the AMD K6-III, in 1999. However, it didn't have an L3 cache on the die, but used the motherboard-based L2 cache present on almost all Super Socket 7 motherboards as an L3. It did have on-die L2, and was designed so that it could use the external cache as L3. The first consumer CPU to have on-die L3 was the Pentium 4 Extreme Edition, a rebranded Xeon introduced late in 2003 to counter AMD's new Athlon 64. Xeons, which are server CPU's, have had L3 since 2001.