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ECS L4S5A Review (1)
Overclocker 22 Mar 2001

SiS's best partner ECS brings out another low cost Pentium 4 board based on the SiS645 chipset. L4S5A is the board that makes Pentium 4 systems more affordable due to the inexpensive chipset from SiS. The SiS 645 chipset brings down the costs of mainboards as it has one of the the best price / performance ratio to date. The SiS645 chipset needs no introduction as it has proven itself in most previews done at various websites. It is a one of the strongest contender among the P4 DDR chipsets with its support of DDR266 and DDR333 DDR RAM. This definitely makes it one of the most attractive alternative to other chipsets that only supports DDR266.

From our tests, different manufacturers that uses the SiS645 chipset tuned their BIOS differently, some managed to optimised it so well but some  has room for improvements. In the subsequent pages, we will first take a look at some photos and later the benchmarks where we compare it to i845D and ALiP4 chipset.

L4S5A V1.X mainboard is an ATX mainboard that uses a 4-layer printed circuit board and measures 305 mm x 220 mm. The mainboard features a mPGA Socket 478 that accommo-dates Pentium 4 processors supporting frontside bus (FSB) speeds up to 400MHz. The L4S5A incorporates the SiS645 chipset which combines support for the new high-bandwidth Double Data Rate (DDR) SDRAM, and the AC 97 audio codec.

PROCESSORS Detail

 One Socket 478 supports the
Intel Pentium 4 processor (478pins)

CHIPSET

  SiS645 & SiS961 Chipset
SiS645 Host/Memory controller with DDR333 and AGP4X North Bridge Single Chipset
SiS961 MuTIOL Media I/O
 LPC I/O - IT8705F
 System Hardware Monitor: Built-in IT8705F
 LAN: RealTek 8100/B (optional)
 AC97 Audio Codec
Compliant with AC97 2.1 specification

MEMORY

 Three 184-pin DDR DIMM sockets to support
Three 2.5V DDR SDRAMs (DDR266/DDR200) or
Two 2.5V DDR SDRAMs (DDR333)
 Maximum: 3GB (2GB only for DDR333)

SYSTEM BIOS

 Award 2MB Flash EEPROM
 Supports Plug and Play 1.0A, AMP 1.2, Multi Boot, DMI
 Full Support for ACPI revision 1.0 specification

I/O INTERFACE

 Supports Plug and Play function
 PS/2 keyboard and PS/2 mouse connectors
 Dual USB Ports and an optional LAN connector
 One - EPP/ECP mode parallel port
 One - 16550 high-speed serial I/O ports
 Audio Ports (Line-in, Line-out, Mic-in, CD-in and game port)
 Dual PCI IDE interfaces - support four IDE devices (PIO mode 4, DMA Mode 2, Ultra DMA 66/100)
 Supports 360K~2.88M Byte, 3 Mode FDDs or LS120
  ATX12V Power Supply Connectors
 ports, Headers and Others:
IrDA header (STR)
Front Panel MIC/Line-out header
COM2 header
Four Extra USB header (LUSB1/USB3 or LUSB2/USB2)
Smart Card Reader Header
HDD LED, Reset Switch, Power Switch headers
CPU, BAK and CHS Fan headers
LAN Card Wake Up / Modem Ring Wake-Up Headers

RTC & BATTERY

 SiS961 built-in 256 bytes of CMOS SRAM
 With CMOS SRAM hardware clear jumper

EXPANSION SLOTS

 6 PCI slots, 1 AGP slot, 1 CNR slot

FORM FACTOR

 ATX (305mm*244mm), 4 Layers

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