Unformatted text preview: 6 to 2.7 GHz, 800 MHz bus
Core 2 Duo—2 processor cores, 1.8–3.33 GHz, 64 bit, 6 MByte L2 cache
Core 2 Quad—4 processor cores, up to 12 MByte L2 cache, 1333 MHz front side bus For More BS-IT Books, Notes & Assignments visit: www.bsit.zxq.net 42 Chapter 2 • x86
Downloaded From: www.bsit.zxq.net Processor Architecture Core i7—4 processor cores, (up to 2.93 GHz), 8 processing threads, 8 MByte smart cache,
3 channels DDR3 memory
Hyperthreading and Multi-core Processing
A dual processor system contains two separate physical computer processors, usually attached
to the same motherboard with its own socket. The computer’s operating system will schedule
two separate tasks (processes or threads) to run at the same time, in parallel.
Intel Hyper-Threading (HT) technology allows two tasks to execute on a traditional single
processor at the same time. This approach is less expensive than a dual processor system, and it
makes efﬁcient use of the processor’s resources. In effect, a single physical processor is divided
into two logical processors. The shared resources include cache, registers, and execution units.
The Intel Xeon processor and some Pentium 4 processors use HT technology.
The term Dual Core refers to integrated circuit (IC) chips that contain two complete physical
computer processor chips in the same IC package. Each processor has its own resources, and each
has its own communication path to the computer system’s front-side bus. Sometimes, dual-core
processors also incorporate HT technology, causing them to appear as four logical processors,
running four tasks simultaneously. Intel also offers packages containing more than two processors, called multi core.
CISC and RISC
The Intel 8086 processor was the ﬁrst in a line of processors using a Complex Instruction Set
Computer (CISC) design. The instruction set is large, and includes a wide variety of memoryaddressing, shifting, arithmetic, data movement, and logical operations. Complex instruction
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This note was uploaded on 11/29/2013 for the course CSE 451 taught by Professor Hussein during the Winter '13 term at Fatih Üniversitesi.
- Winter '13