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Asus P5Q-EM Intel G45 Express Motherboard Review

Asus P5Q-EM Intel G45 Express Motherboard Review - PCSTATS
Abstract: To complement the High Definition decoding of the G45 Express, the P5Q-EM offers up HDMI, DVI and VGA video outputs, allowing you to output HD video right to a home theatre display without any additional expense.
 89% Rating:   
Filed under: Motherboards Published:  Author: 
External Mfg. Website: ASUS Jan 27 2009   Julian Apong  
Home > Reviews > Motherboards > ASUS P5Q-EM

Total System Power Draw Comparisons

Here's how the motherboard stacks up in real life against a couple different motherboards. We have no way of directly measuring motherboard power draw, so PCSTATS measures total system power draw and compares that in CPU-loaded (max value recorded in Prime95) and idle states (at Windows Vista desktop). An Extech 380803 AC Power Analyzer and A-PFC compliant PC Power and Cooling 750W power supply were used for these tests.

PCSTATS Benchmark ReportSystem Power Draw Tests: (PCPower 750W PSU)
Desktop Idle (W) Watts Ranking
Intel DG45ID (Intel G45 200/800 C2D E6750 Onboard G45 ) 68
Asus P5Q-EM (Intel G45 200/800 C2D E6750 GF 8800GTS 320MB) 131
Asus P5Q-EM (Intel G45 200/800 C2D E6750 Onboard G45 ) 72
Foxconn A7DA-S (AMD 790GX 200/800 AM2 X2 5000+ GF 8800GTS 320MB) 131
Foxconn A7DA-S (AMD 790GX 200/800 AM2 X2 5000+ onboard HD 3300 video) 61
Biostar Tpower N750 (NF 750a 200/800 AM2 X2 5000+ GF 8800GTS 320MB) 110
Biostar Tpower N750 (NF 750a 200/800 AM2 X2 5000+ onboard nF 750a video) 45.4
Prime95 Stressed (W) Watts Ranking
Intel DG45ID (Intel G45 200/800 C2D E6750 Onboard G45 ) 121
Asus P5Q-EM (Intel G45 200/800 C2D E6750 GF 8800GTS 320MB) 224
Asus P5Q-EM (Intel G45 200/800 C2D E6750 Onboard G45 ) 122
Foxconn A7DA-S (AMD 790GX 200/800 AM2 X2 5000+ GF 8800GTS 320MB) 192
Foxconn A7DA-S (AMD 790GX 200/800 AM2 X2 5000+ onboard HD 3300 video) 121
Biostar Tpower N750 (NF 750a 200/800 AM2 X2 5000+ GF 8800GTS 320MB) 187
Biostar Tpower N750 (NF 750a 200/800 AM2 X2 5000+ onboard nF 750a video) 127
3DM06 IGP Stressed (W): Watts Ranking
Intel DG45ID (Intel G45 200/800 C2D E6750 Onboard G45 ) 115
Asus P5Q-EM (Intel G45 200/800 C2D E6750 GF 8800GTS 320MB) 182
Asus P5Q-EM (Intel G45 200/800 C2D E6750 Onboard G45 ) 119
Foxconn A7DA-S (AMD 790GX 200/800 AM2 X2 5000+ GF 8800GTS 320MB) 223
Foxconn A7DA-S (AMD 790GX 200/800 AM2 X2 5000+ onboard HD 3300 video) 124
Biostar Tpower N750 (NF 750a 200/800 AM2 X2 5000+ GF 8800GTS 320MB) 226
Biostar Tpower N750 (NF 750a 200/800 AM2 X2 5000+ onboard nF 750a video) 118

The Asus P5Q-EM's power draw at idle is highest amongst the integrated motherboards tested, although once the system is stressed the power drawn falls into line.

Asus' Energy Processing Unit (EPU) is built into the Asus P5Q-EM motherboard, and what the EPU does is dynamically alter the amount of power phases the motherboard uses depending on usage and system load. PCSTATS tested the EPU along with is accompanying software.

The EPU software isn't quite as helpful or as informative as the Dynamic Energy Saver software found with the Gigabyte EP45-DS4 motherboard. Here we have an option to switch between power saving mode and performance mode, or place the entire Asus P5Q-EM system on auto. The amount of power saved isn't reported back to the user except in the cryptic form of the amount of CO2 emissions reduced, which in turn assumes your computer is powered by coal. Give us actual wattage used! Display wattage savings over time!

This sub-menu is a little more interesting, and can be used to set manual voltage throttling limits on the CPU. This will have a direct impact on system performance, but does save quite a bit of wattage at its most extreme settings (note Asus EPU will throttle CPU clock speed to save power). Unfortunately there's still no direct display of the actual numbers, so it's difficult to know how much of a voltage downgrade "high" is compared to "medium".

Finally, PCSTATS plugged the P5Q-EM in, turned on the EPU, and re-ran our power draw benchmark tests.

Energy Saving - Total System Power Draw
Motherboard State: Power Draw: w/h ASUS EPU: Approx. Power Saved:
Desktop Idle 72 W 68 W 4 W
Prime 95 Stressed 122 W 117 W 5 W
IGP 3DMark06 Stressed 119 W 119 W 0 W

The EPU isn't doing a whole lot here to modify the power being consumed by the Asus P5Q-EM motherboard - saving 5 watts at stressed isn't particularly impressive. Turning on the EPU for idle power saving can make for some power savings over a long term period. Over the lifetime of a motherboard's use, shaving off even a few watts overall from a system that's always on can equate to some money saved off the electricity bill.

Okay, on to the highlights of the Asus P5Q-EM motherboard.

< Previous Page © 2017 PCSTATS.com Next Page >

 

Contents of Article: ASUS P5Q-EM
 Pg 1.  Asus P5Q-EM Intel G45 Express Motherboard Review
 Pg 2.  Intel G45 Express Chipset
 Pg 3.  High Definition Video Playback
 Pg 4.  — Total System Power Draw Comparisons
 Pg 5.  Asus P5Q-EM Motherboard Highlights
 Pg 6.  Overclocking Test Report, Test System Specs
 Pg 7.  Motherboard Benchmarks: SYSmark 2007 Preview
 Pg 8.  Motherboard Benchmarks: SiSoft Sandra 2008 - Processor
 Pg 9.  Motherboard Benchmarks: Sandra - Memory
 Pg 10.  Motherboard Benchmarks: PCMark Vantage
 Pg 11.  Motherboard IGP Benchmarks: 3DMark06
 Pg 12.  Motherboard IGP Benchmarks: 3DMark Vantage, FEAR
 Pg 13.  DX10 Motherboard IGP Benchmarks: Call of Juarez, Crysis
 Pg 14.  Intel X4500HD Graphics - Smooth HD Playback?

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