1745-PCC A-B 口碑好,信誉优
1745-PCC A-B 口碑好,信誉优
1745-PCC A-B 口碑好,信誉优
CPU是英语“Central Processing Unit/中央处理器”的缩写,CPU一般由逻辑运算单元、控制单元和存储单元组成。在逻辑运算和控制单元中包括一些寄存器,这些寄存器用于CPU在处理数据过程中数据的暂时保存, 其实我们在买CPU时,并不需要知道它的构造,只要知道它的性能就可以了。
CPU主要的性能指标有:
主频即CPU的时钟频率(CPU Clock Speed)。这是我们关心的,我们所说的233、300等就是指它,一般说来,主频越高,CPU的速度就越快,整机的就越高。 时钟频率即CPU的外部时钟频率,由电脑主板提供,以前一般是66MHz,也有主板支持75各83MHz,目前Intel公司新的芯片组BX以使用100MHz的时钟频率。另外VIA公司的MVP3、MVP4等一些非Intel的芯片组也开始支持100MHz的外频。精英公司的BX主板甚至可以支持133MHz的外频,这对于超频者来是的。
内部缓存(L1 Cache):封闭在CPU芯片内部的高速缓存,用于暂时存储CPU运算时的部分指令和数据,存取速度与CPU主频一致,L1缓存的容量单位一般为KB。L1缓存越大,CPU工作时与存取速度较慢的L2缓存和内存间交换数据的次数越少,相对电脑的运算速度可以提高。
外部缓存(L2 Cache):CPU外部的高速缓存,Pentium Pro处理器的L2和CPU运行在相同频率下的,但成本昂贵,所以Pentium II运行在相当于CPU频率一半下的,容量为512K。为降低成本Inter公司生产了一种不带L2的CPU命为赛扬,性能也不错,是超频的理想。
MMX技术是“多媒体扩展指令集”的缩写。MMX是Intel公司在1996年为增强Pentium CPU在音像、图形和通信应用方面而采取的新技术。为CPU增加57条MMX指令,除了指令集中增加MMX指令外,还将CPU芯片内的L1缓存由原来的16KB增加到32KB(16K指命+16K数据),因此MMX CPU比普通CPU在运行含有MMX指令的程序时,处理多媒体的能力上提高了60%左右。目前CPU基本都具备MMX技术,除P55C和Pentium ⅡCPU还有K6、K6 3D、MII等。
制造工艺:现在CPU的制造工艺是0.35微米,新的PII可以达到0.28微米,在将来的CPU制造工艺可以达到0.18微米。
CPU的厂商
Advanced Micro Devices - AMD,其中一个生产兼容x86计算机的CPU生产商
ARM Ltd - 安谋国际科技,少数只授权其CPU设计而没有自行制造的公司。嵌入式应用软件常被ARM架构微处理器执行。
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HARMONIC DRIVE TECH HDC04M2002A
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HARMONIC DRIVE TECH HDC2M200
HARMONIC DRIVE TECH HDC-40100-2A
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HARMONIC DRIVE TECH HDUC-40100-2A
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HARMONIC DRIVE TECH HTL8000-1L-AS-DC
HARMONIC DRIVE TECH ME07E1501
HARMONIC DRIVE TECH SC-500-2-230-S1
HARMONIC DRIVE TECH SC-510-5-230-S0
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HARMONIC DRIVE TECH 472448-1
HARMONIC DRIVE TECH 479543-1
HARMONIC DRIVE TECH 479885-1
HARMONIC DRIVE TECH RH-8B-6006-E020DO
HARMONIC DRIVE TECH RH116001
HARMONIC DRIVE TECH CSF-20-160-2A-GR
HARMONIC DRIVE TECH P4760X
HARMONIC DRIVE TECH HDC-3CGP
HARMONIC DRIVE TECH HA4002230S1
HARMONIC DRIVE TECH FHA17A6006E100SP
HARMONIC DRIVE TECH HS-450R-3
HARMONIC DRIVE TECH HDE-20-160-2A-GR-SP
HARMONIC DRIVE TECH HDUA-50-160-BLS-SP2300
HARMONIC DRIVE TECH HDC-5C-080
HARMONIC DRIVE TECH HDC-2M-120-2A
HARMONIC DRIVE TECH 1020595120
HARMONIC DRIVE TECH HDC-2M2002A
HARMONIC DRIVE TECH 1020595200
HARMONIC DRIVE TECH HDC-4M-100-2A
HARMONIC DRIVE TECH 1020596100
HARMONIC DRIVE TECH 1020-596-080
HARMONIC DRIVE TECH HDE-50-80-2A-GR-SP
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HARMONIC DRIVE TECH 1020594100
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