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ASUS P5N-T Deluxe nVidia nForce 780i SLI Motherboard Review

ASUS P5N-T Deluxe nVidia nForce 780i SLI Motherboard Review - PCSTATS
Abstract: ASUS P5N-T Deluxe motherboard, one of Asus' AI Lifestyle motherboards which comfortably straddles the line between mid-range and high-end.
 75% Rating:   
Filed under: Motherboards Published:  Author: 
External Mfg. Website: Asus Mar 05 2008   Julian Apong  
Home > Reviews > Motherboards > Asus P5N-T Deluxe

Overclocking with ASUS on the nForce 780i

Overclocking Results:
Stock Max. OC
Motherboard Speed: 333 MHz

475 MHz

If you're new to Overclocking and not sure what to do, check out these two excellent Guides for some pointers:
Overclocking the CPU and Memory
Overclocking the Videocard

Asus and overclocking go together like milk and cookies, so PCSTATS definitely had high hopes for the ASUS P5N-T Deluxe motherboard. The board was installed with an Intel Core 2 Duo E6750 processor and a 2GB kit of Corsair DOMINATOR Twin2X2048-8888C4DF memory. If it isn't Corsair, you ain't getting far!

Before PCSTATS overclocking tests began the DDR2 memory was configured to run in 800 MHz mode and the Core 2 Duo's clock multiplier set to 6x in the Asus Extreme Tweaker BIOS. With the nVidia 780i chipset the actual bus speed is listed in the BIOS, so we began at 1333MHz (4 x 333MHz FSB) and jumped to 1400(350), 1440(360), 1500(375), 1540(385), 1580(395), 1600(400), 1640(410), 1680(420), 1760(440), 1800(450), 1840 (460) and finally 1880MHz (470MHz). To achieve this we had to up the nforce 780i northbridge voltage to 1.40V, memory to 1.99V.

To achieve an overclock of 1900 MHz (475MHz) we had to up northbridge voltage to 1.54V, memory to 2.05V, and that was about as far as we were able to get with the Asus P5N-T Deluxe motherboard.

The final overclocking results a stable overclock at 1900MHz (4 x 475MHz FSB), with a northbridge voltage of 1.54V, and memory at 2.05V. While this still falls a little shy of overclocks we've seen on some Intel X38 Express chipsets, it's still a respectable boost to CPU performance.

A Quick Look inside the BIOS:

nVidia's enthusiast BIOS options are always easy to work with, and allow for fine control over pretty much every aspect of the system.

Here you can unlink the Memory Clock from the FSB, which is great if you're using slower memory that will fall outside of a specified FSB-to-memory clockspeed ratio.

Here are the max voltages the board supports - make sure NOT to turn up your memory voltage up to 3.110V yourself or you will kill the processor

Prelude to Benchmarks

The details of how the ASUS P5N-T Deluxe motherboard test system was configured for benchmarking, including the specific hardware, software drivers, operating system and benchmark versions are indicated below. In the second column are the general specs for the reference platforms this nVidia nForce 780i based system is to be compared against. Please take a moment to look over PCSTATS test system configurations before moving on to the individual benchmark results.

PCSTATS Test System Configurations
Test System Reference System #1
Processor: Intel Core 2 Duo E6750 Intel Core 2 Duo E6750 (775)
Clock Speed: 8 x 333 = 2.66 GHz 8 x 333 MHz = 2.66 GHz

ASUS P5N-T Deluxe (nF 780i)

Gigabyte GA-X38-DQ6 (X38 Express)
Asus Maximus Extreme (X38 Express)
Asus BLITZ Formula (P35 Express)
Foxconn MARS (P35 Express)
MSI P6N Diamond (NF 680i)
Biostar TF7150V-M7 (GF 7150)
Foxconn DigitaLife X38A (X38 Express)
MSI X48 Platinum (X48 Express)

Videocard: MSI NX8800GTS-T2D320E
Memory: Corsair DOMINATOR Twin2X2048-8888C4DF (DDR2)

Corsair DOMINATOR Twin2X2048-8888C4DF (DDR2)
Corsair DOMINATOR Twin3X2048-1800C7D (DDR3)

Hard Drive: 74GB Western Digital Raptor WD740
CDROM: AOpen Combo 52x
Power Supply: PC Power & Cooling Silencer 750W quad
Heatsink: Intel E6750 Reference
Software Setup:

Microsoft Windows Vista Ultimate
Intel INF 8.30.1013
nVIDIA Forceware 169.25


SYSMark 2007
SiSoft Sandra XII
Super Pi Mod 1.5
PCMark Vantage
Quake 4

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Contents of Article: Asus P5N-T Deluxe
 Pg 1.  ASUS P5N-T Deluxe nVidia nForce 780i SLI Motherboard Review
 Pg 2.  Motherboard Highlights Photo Gallery
 Pg 3.  nVIDIA nForce 780i Chipset
 Pg 4.  — Overclocking with ASUS on the nForce 780i
 Pg 5.  Motherboard Benchmarks: SYSmark 2007 Preview
 Pg 6.  Motherboard Benchmarks: SiSoft Sandra, Super Pi
 Pg 7.  Motherboard Benchmarks: 3DMark06, Quake 4, FEAR
 Pg 8.  Motherboard Benchmarks: FEAR, Super Pi
 Pg 9.  Motherboard Benchmarks: PCMark Vantage
 Pg 10.  PCSTATS Maximum Motherboard Overclocking Chart & Conclusions

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   04 / 23 / 2019 | 8:20PM
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