VIA C7

VIA C7 is a microprocessor family from VIA Technologies, which are x86 compatible. Were developed, the processors of Centaur Technology, a subsidiary of VIA. The C7 series is the successor of the VIA C3 and WinChip of IDT and is divided into the C7, C7 -M and C7 -D.

  • 3.1 Esther

Development

Microprocessors from Centaur are developed with the main objective cheaper production costs. To make this possible, it is necessary to keep the area as small as possible. This inevitably means that the processor architecture has to be very simple. This will rule out functional units, which consume large amounts of logic transistors, such as integrated memory controller and Hyper- Threading. Due to relatively low transistor count and die area banks and the resulting saving of expensive development work, the price is reduced effectively. Thus, for these processors a favorable price- performance ratio and also a lower compared to other x86 processors power consumption.

Models

All C7 processors are based on the processor core Esther ( C5J ), which was officially launched on 27 May 2005. Due to the low energy consumption of the processor core it is to thin clients, PVRs and similar devices are used primarily in notebook computers. Esther is generally based on the Nehemiah ( C5P ), but was equipped inter alia with an improved PadLock engine. In addition, the support of SSE2, SSE3 and NX bit was integrated. According to VIA is to receive only 0.1 watts of electrical power and so have better energy efficiency than Intel's Pentium M Esther, thanks to power-saving technology PowerSaver 4.0 in idle mode. As a further innovation, the new VIA V4 bus bus protocol has been implemented, only the VIA CN700 and VIA CN800 models are currently on the chipset as available. The processor core is also used in the Eden series in the VIA Eden ULV models and VIA Eden.

C7

The VIA C7 is a classic microprocessor for low- cost desktop PCs, with VIA emphasized the low energy consumption. Since the processor, however, remains on the performance behind appropriate competing products from AMD and Intel, he is rarely built into corresponding PCs. It is mainly used on VIA EPIA motherboards used.

C7 -M

The VIA C7 -M mobile processor is a typical and differs from C7 by an even lower energy consumption.

C7-D

The VIA C7 -D is a renamed C7 in principle. However, VIA is in this processor on the concept of environmental protection and emphasizes its environmental impact.

Model data

Esther

  • Codename: C5J
  • L1 cache: 64KB data 64KB instruction
  • L2 cache: 128 KB with processor clock
  • MMX, SSE, SSE2, SSE3, Power Saver 4.0, NX bit, PadLock Engine ( 2 RNG, an ACE ), SMP
  • VIA V4 bus protocol with 100 and 133 MHz front side bus (quad pumped, FSB400 and FSB533 )
  • Design: FCPGA, NanoBGA2, used Intel's 479 -pin infrastructure, all models are ungesockelt and are soldered directly
  • Operation voltage ( Vcore ): 0.8 V
  • Power consumption ( max): 20 W
  • Release Date: May 27, 2005
  • Manufacturing Technology: 0.09 micron ( SOI) at IBM
  • The size: 31.7 mm ² at 26.2 million transistors
  • Clock speeds: 400 MHz to 2 GHz C7: 400, 500, 600, 800, 1000, 1200 and 1500 MHz
  • C7 -M FSB400: 1.5 GHz
  • C7 -M FSB533: 1600, 1867 and 2000 MHz
  • C7 -M ULV FSB400: 1000, 1200 and 1500 MHz
  • C7-D FSB400: 1.5 and 1.8 GHz
Instruction set Microarchitecture Socket 479 Integrated Device Technology Hyper-Threading Domestic energy consumption Cache (computing) List of microprocessors VIA CoreFusion
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