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The DFI NB72-SR (845 SDRAM) Mainboard

The Pentium 4 was introduced along with Intel's 850 chipset, not long ago it was the only solution available for the Pentium 4; obligating people to use it without giving them choice to go with an alternative solution. The 850 is Intel's high end solution for the Pentium 4, mainboards based on the 850 cost more and use the more expensive RDRAM memory. In order to spread the Pentium 4 more into the mainstream market, an alternate chipset had to be introduced.

The 845 chipset is Intel's solution to get the Pentium 4 into the mainstream market; the chip costs lower to produce, the new core logic allows mainboard makers to get back to the lower cost four-layer PCB's and at the same time takes use of the less expensive SDRAM or DDR SDRAM memory. We are looking at the DFI NB72-SR; an 845 SDRAM based Pentium 4 mainboard.

Features
Info
  • Intel 845 Chipset
  • 5 PCI slots
  • 1 CNR
  • Onboard Audio
  • Supports PC133 SDRAM
  • AC`97 Audio codec
  • RAID 0 or 1, STR
  • Socket 478



DFI CORP

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8/10

Intel 845

Intel introduced their 845 chipset earlier this year in order to accommodate their Pentium 4 with a value segment chip which costs less to produce and eliminating the need of using the expensive RDRAM memory. The South Bridge of the 845, ICH2, is the same as in the high end 850 chip which supports 4 USB 1.1 ports, ATA/100 support, CNR/AMR slots and a 6 channel AC"97 audio along with a LAN interface.

The North Bridge features support for the Pentium 4 processor running at 400MHz Quad Pumped Bus, supports 3GB of memory for PC133 SDRAM or 2GB of PC1600/PC2100 DDR SDRAM along with AGP4X. Note that as Intel positioned the 845 as a value segment, ECC support is not available on the memory controller.

The 845D (DDR) and 845 (PC133) versions offer the same features; both share the same ICH2 hub. The only difference between the 845D (DDR) and the 845 (SDRAM) is the memory controller which features support for DDR SDRAM. For more information on the 845 DDR take a look at our FIC VC15 845 DDR review.



Intel 845 Schematic

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