Seven 650i SLI Motherboards Compared

BIOS And Overclocking

The P5N-E SLI supports a wide selection of frequencies far higher than any of the onboard components are actually capable of reaching. A broad-enough voltage range allows overclocking the majority of Core 2 and Pentium D processors to the limit while pushing most DRAM beyond its limit.

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BIOS Frequency and Voltage settings (for overclocking)
FSB Frequency100 - 750 MHz (1 MHz)
Clock Multiplier AdjustmentYes
DRAM Frequency400-2600 MHz Data Rate
PCIe Clock100-131 MHz (1 MHz)
CPU Vcore0.83125 - 1.60000 Volts (0.00625 Volts)
Northbridge (SPP)1.208, 1.393, 1.563, 1.748 Volts
DRAM Voltage1.920 - 2.517 Volts (~0.08 Volts)
CAS Latency Range
tCAS: 1-6; tRCD: 1-7; tRP: 1-7; tRAS: 1-31; Command Rate: 1T/2T

Reaching 3450 MHz (345x10) at 1.50V on an E6700 typically capable of 3460 MHz sounds "close enough" to the limit, given that the P5N-E SLI has only three-phase CPU voltage regulation. Further testing at higher bus speeds using a lower multiplier wasn't possible because the multiplier control didn't work with this processor.


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Documentation & SoftwareMotherboard ManualAdded-Value Software CDMotherboard Driver CD
Hardware1x 80-conductor Ultra ATA cable1x Floppy Drive Cable2x SATA Data Cable1x 2-port USB 2.0 Breakout Plate1x I/O Panel Shield1x SLI Bridge1x Asus Q-Connect connector kit

The P5N-E SLI includes only half the Ultra ATA and SATA cables supported by the board, but that's still enough for most builds. Asus supplements its light cable kit with a reasonably valuable added software pack, a case badge, and its Q-Connect easy front-panel cable connector kit.

The software includes Norton Internet Security Suites 2006 for Windows XP and 2007 for Windows Vista, Corel Snapfire 11SE, and assorted trial software and freeware.

The Asus P5N-E SLI retails for around $140 in online retail outlets.

Thomas Soderstrom
Thomas Soderstrom is a Senior Staff Editor at Tom's Hardware US. He tests and reviews cases, cooling, memory and motherboards.