ASUS P5W-DH Deluxe
Basic Features

ASUS P5W-DH Deluxe
Market Segment High-End/Enthusiast
CPU Interface Socket T (Socket 775)
Chipset Intel 975X + ICH7R
CPU Support Core 2 Duo, Pentium D, Celeron D, Pentium XE, LGA-775 based Pentium 4
Thermal Design 8-phase power
Fan-less Heatpipe Cooling
ASUS Stack Cool for OC
Default Bus Speed 1066 (533/266)
Bus Speeds 100 to 500 in 1MHz Increments
Memory Speeds DDR2 at Auto,400,533,667,711,800,889,1067
PCIe Speeds Auto, 90 to 150 in 1MHz Increments
Performance Mode Auto, Standard Turbo
AI Overclocking Manual, Auto, Overclock Profile, AI N.O.S.
PCI Auto, 33.3, To CPU
Core Voltage Auto, 1.225V (Actual CPU voltage) to 1.7000V in 0.0125V increments
FSB Termination Voltage Auto, 1.2v, 1.3v, 1.4v, 1.5v
MCH (Memory Controller Hub) Voltage Auto, 1.50v, 1.55v, 1.60v, 1.65v
ICH (SB) Voltage Auto, 1.05v, 1.20v
PEG Link Mode Auto, Slow, Normal, Fast, Faster
CPU Clock Multiplier Auto, 4x-25x in 1X increments
DRAM Voltage Auto, 1.8V to 2.4V in .05v increments
DRAM Timing Control 9 Options
Hyper Path 3 Auto, Disabled, Enabled
Multi-GPU Option CrossFire (2 X8 PCIe)
Memory Slots Four 240-pin DDR2 DIMM Slots
Dual-Channel Configuration
Unbuffered ECC/non ECC Memory to 8GB Total
Intel MPT (Memory Pipeline Technology)
ASUS HyperPath3
Expansion Slots 2 PCIe X16
2 PCIe X1
3 PCI Slots
Onboard SATA/RAID 3 SATA2 3Gb/s Drives by Intel ICH7R
(RAID 0,1,5) PLUS
2 SATA2 3 Gb/s Drives by JMicronJMB363
(RAID 0,1) (1 internal,1 external) PLUS
2 SATA2 3 Gb/s Drives by Sil4723
(supports RAID 10 by combining iCH7R drives with Sil4723 drives)
TOTAL - 7 Sata2 3Gb/s drives
Onboard IDE/IDE RAID One Standard ATA133/100/66 (2 drives) by JMicron JMB363
Onboard USB 2.0/IEEE-1394 8 USB 2.0 ports supported by ICH7R
2 Firewire 1394a by TI
Onboard LAN DUAL PCIe Gigabit by Marvel 88E8053 for AI Net2, PLUS
WiFi 54Mbps supporting 802.11g
Onboard Audio Azalia HD Audio by Realtek ALC882M
8 channel codec
Supports Dolby Master Studio including Dolby Digital Live
Power Connectors 24-pin ATX
4-pin EATX 12V
Back Panel I/O Ports 1 x PS/2 Keyboard
1 x PS/2 Mouse
1 x Serial
1 x Audio I/O Panel (6 plug programmable)
1 x Optical S/PDIF Out Port
1 x Coaxial S/PDIF Out Port
1 x IEEE 1394a Firewire
1 x External SATA2
2 x RJ45 LAN
1 x Wireless LAN antenna
4 x USB
BIOS Revision AMI 701 - July 8, 2006

Current thinking in overclocking options is to provide very fine adjustments for voltages over a very wide range of control - particularly in the memory voltage control. ASUS has done this on other recent boards, like the AM2-based M2N32-SLI Deluxe. However, the P5W-DH only extends to 2.4V compared to the 2.5V on the M2N32-SLI and granularity of the adjustments is a pretty coarse 0.5V compared to 0.2V on the M2N32-SLIl. We suspect this is because the P5W-DH is mainly a refresh to the existing ASUS P5WD2-E, which we reviewed at ASUS P5WD2-E Premium: Intel 975X for the Enthusiast when it was introduced in January.

Click to enlarge

As you will see below, overclocking was outstanding, but we suspect that higher voltage adjustments on the MCH would allow even higher overclocks. The ASUS stops at 1.65V, while the Intel BadAxe goes on to 1.725V. We would welcome ASUS raising the top voltage on the MCH. There are reports that modding the ASUS to reach 1.9V MCH allows FSB overclocks to almost 500 instead of the current limit of around 440 to 450 FSB.

If you compare the new board to the earlier P5WD2-E you will find the board is basicly the same. The storage controllers have been changed to a Silicon Image that allows a port-multiplier type connect to one of the ICH7 ports. This allows driverless RAID. The board has also dropped the PCIe x4 slot. Asus also replaced the Marvel SATA/PATA controller with the updated JMicron chip. In general. though, our comments in the P5WD2-E review still accurately describe the board's strengths and weaknesses.

The P5W-DH Deluxe adds the lower voltages required by Core 2 Duo and meets the voltage stability requirements for Conroe. Both of these factors are why almost all existing Socket 775 boards cannot handle Core 2 Duo. Both a BIOS and a hardware change are required for proper operation with Conroe.

Basic Performance

All-in-all the ASUS P5W-DH Deluxe is one of the best Conroe boards we have tested. The 975X chipset is definitely more mature than current P965 chipset motherboards. Having said that, there were still several BIOS revisions during our testing to update certain peculiarities in the current steppings of Core 2 Duo.

The ASUS board was every bit as stable with Core 2 Duo as the Intel BadAxe, which for a long time was the only board that would operate with Conroe. The ASUS also implements the ability to adjust X6800 (2.93EE) ratios both up and down, which is a feature of this processor, but is not supported on all boards. The ASUS overclocks further than any other stock board we tested, and it recovers from bad overclocks gracefully. If the OC is close a reboot will usually allow further adjustment. If the OC is far off you need to physically turn off the power then restart to further adjust the BIOS. This is a much more friendly board for OC than the Intel BadAxe, for instance, that will not recover from any failed OC without a full power down and sometimes a CMOS clear.

The ASUS P5W-DH Deluxe also fully supports dual X8 CrossFire. The Enthusiast wanting to overclock Conroe as far as possible or anyone wanting to run ATI multi-GPU on an Intel chipset will be very happy with the P5W-DH. We liked the board enough that it became our new standard board for our DDR2 memory testing platform.


ASUS P5W-DH Deluxe
Overclocking Testbed
Processor: Intel Core 2 Duo E6700
Dual Core, 2.67GHz, 4MB Unified Cache
1066FSB, 10x Multiplier
CPU Voltage: 1.525V (default 1.2V)
Cooling: Tuniq Tower 120 Air Cooling
Power Supply: OCZ GameXstream 700W
Memory: Corsair Twin2X2048-PC2-8500C5 (2x1GB)
(Micron Memory Chips)
Hard Drive Hitachi 250GB 7200RPM SATA2 16MB Cache
Maximum OC:
(Standard Ratio)
4000MHz (+50%)

The decision was reached to evaluate motherboards with the E6700 (2.67) processor, as it represents the mid-range of Conroe pricing. Of course, all Conroe processors except for the top X6800 are multiplier locked, which limits options in overclocking. Like Socket 478 that does not appear a huge handicap, since the stock E6700 reached a 50% overclock at 4.0 GHz. Our new OC test bed uses an excellent air cooler in the Tuniq Tower, and you are likely to experience lower overclocks with stock cooling.

The ASUS P5W-DH also reached 4.0GHz with an X6800 (stock 266 x15 at 1.575V) and an E6600 at 445FSB x 9x multiplier. All of these results are outstanding, representing overclocks at stock ratio as high as 67%.

With the wide range of adjustable memory ratios and voltages, memory was set to end up somewhere around DDR2-800 3-3-3-9 at 2.2V. This is really easy with the ASUS P5W-DH BIOS, since the BIOS shows the resulting memory speed when you adjust the FSB speed. This means you don't have to calculate the resulting memory speed when trying to set up a rational overclock, which is a really convenient feature for most enthusiasts.

Overclocking is always dependent on the chip you have and the capabilities of the motherboard. Processors vary in their OC abilities, and OC is never a given. However, we are confident that wherever you can go with your CPU it is not likely the ASUS P5W-DH Deluxe will be holding back your overclocking efforts.

Chipsets Intel 975XBX
Comments Locked


View All Comments

  • WynX - Monday, August 21, 2006 - link

    Great article!!!

    Really waiting for the nforce 5 series (to be mature too).
  • wheelconnector - Saturday, August 19, 2006 - link

    on the review here it says that the 975xbx can support ddr2 800MHz memory speeds, but anywhere else that I've checked, claims that the board only supports speeds upto 667MHz. Can the board take 800MHz out of the box? or will I have to mess around with it to accept the RAM?
    thanks a lot
  • LeeKay - Wednesday, August 9, 2006 - link

    I hope u still have your mushkin XP2-8000 (redline) and never sent it back.

    Here is my hardware.
    P5N32-SLI SE Deluxe / P5B Deluxe.
    Asus Silent tower CPU cooler.
    E6600 Processor.
    2x1GB Mushkin Redline DDR2 1000Mhz / 2x1GB OCZ Platnium 800MHZ
    2x 150GB Raptors,
    1x Seagate 300GB Drive,
    Powerstream 600Watt PSU
    2x EVGA 7950GX2
    Coolermaster Stacker.
    Plexter SATA 755 Drive
    Liteon IDE drive
    Mitsumi Floppy Drive
    Creative Labs X-Fi Extreme gamer.

    Here is my problem..


    I put 2 sticks of ram in the system with the video card will not post. I have to remove one stick of ram and leave one stick in B1 or B2. It will not boot from a cleared bios with a stick in A1 or A2. I then have to go in the bios and set the memory below or at 800Mhz for it to post with 2 sticks of ram in it. Even then when I put the two sticks in and go to the bios it shows only 1024MB or system ram. But the post screen clearly shows 2048. There is nothing wrong with this memory. It ran fine with the P5B motherboard.

    When using the OCZ it posts no problem but again shows 2048MB at post and in bios and the OS only shows 1024MB Avalible.

    Asus Tech support is the worst in the world. They instantly tell you its a faulty board this and that. But its not its the bios I am 100% sure it is.

    Could you Anandtech please setup a test bed with the 0121 bios and try it. If it has no issue could you please try 0204 revision and then tell me. I have the same motherboard revision as you show in the picture.

    Thanks in advance.
  • Bugs66 - Wednesday, August 2, 2006 - link

    I see more and more older boards with Core 2 Duo support. Such as the Asus P5PE-VM which is 865G, AGP, and DDR400. I am very curious how performance is hit using the older chipset. These boards are great for folks who do not want to toss their RAM, video card, etc unless there is a huge difference.

    Thanks for the great writeup.
  • trajan - Saturday, July 29, 2006 - link

    The article mentions these will be coming out soon for socket 775/Conroe. Anyone know when? I've been surfing around for hours trying to find info on it. I know NVidia has made the NForce 500s for Intel but none of the board manufacturers lists any info at all.

    Just trying to decide if I should go ahead and get the ASUS P5N32-SLI Deluxe (I want to run SLI) or if it's only a short wait for something better.. !

  • rallyhard - Monday, July 24, 2006 - link

    Thanks for the great review.
    I was going back and referencing some information from it today and noticed that in the P5W-DH Deluxe Basic Features table, you have the number of IDE ports listed incorrectly as one. There are actually two ports, one provided by the JMicron JMB363, and the other from the ICH7R southbridge. I got that info from the Asus website.

    Is that the other IDE port over below the last PCI port?! If so, that's rediculous.
    But this is one of very few Core 2 Duo supporting motherboards that I've seen that have 2 IDE ports, so I might just have to get it.

    Gary, I look forward to the upcoming review you mentioned earlier in these comments of the Biostar motherboard with the VIA VT6410 controller. IDE performance continues to be important to me, and will for quite some time with the investment I've already made in hard drives. NEVER AGAIN will I get burned by an under-reviewed, underperfoming chip like the IT8212F!

    Thanks again for your quality reviews.
  • thedjvan - Sunday, July 23, 2006 - link

    I am very impressed with this guide, looks like a lot of hard work went into it!

    I have a question though. I am using the release of Conroe as an excuse to build a whole new system. After reading your guide in addition to others, I've decided on the E6700 and the DFI board (as I don't plan on OCing much, if at all).

    However, the video card I had chosen is a X1900XTX, as I have read many bad reviews on the 7900 series having assorted problems with heat and other issues.

    Now, having read this, I see that Conroe isn't playing nice with my chosen vid card, possibly due to driver issues. My question: Have you guys received any word from ATI, or has a new driver been pushed out yet that brings its performance up to par where it should be? There's absolutely no reason the Nvidia card should be blowing it away, especially on HL2 and other typically ATI friendly games.

    If not, should I forget the ATI card and take a chance on one of the Nvidia cards, or simply go with the ATI card and hope they push out new drivers soon? The AMD/ATI aquisition further complicates the situation... I somehow doubt they'd do any favors for intel based systems.
  • thedjvan - Sunday, July 23, 2006 - link

    No edit button :(

    I meant a X1900XT, not the XTX version. I'll keep my $100, thanks :)
  • thedjvan - Sunday, July 23, 2006 - link

    Sorry, one more quick question. Is the Zalman CNPS9500 compatible with the Conroe?
  • Gary Key - Sunday, July 23, 2006 - link


    Sorry, one more quick question. Is the Zalman CNPS9500 compatible with the Conroe? very well by the way. ;-)

Log in

Don't have an account? Sign up now