Conroe Buying Guide: Feeding the Monster
by Gary Key & Wesley Fink on July 19, 2006 6:20 AM EST- Posted in
- Motherboards
Intel 975XBX
Basic Features
The Intel 975XBX, known by most as the BadAxe, was the first motherboard to officially support Core 2 Duo. AnandTech reviewed the board in January 2006 at Intel D975XBX: Intel brings their BadAxe to Market, but that early board was not really compatible with the just-launched Core 2 Duo processors. For Conroe compatibility the BadAxe must be Revision 0304 or later.
Since BadAxe was the only Conroe choice during much of the developmental testing, it quickly gained a list of user modifications that seems almost endless. The 975XBX is an Intel board that is actually capable of being overclocked and that actually has some decent adjustment options in the BIOS. This is not something you expect from Intel boards in the past, but it has definitely been an increasing part of Intel's top-end offerings.
The current BadAxe board has a few improved options in the BIOS, like overclock options to 50% instead of 30%, but it is otherwise still the exact same board AT reviewed this past January. For more information on the board please go to the AnandTech BadAxe review.
Basic Performance
While Intel does provide options that enable overclocking BadAxe, they still have a lot to learn about producing a motherboard for the Enthusiast. If you set a bad overclock on the BadAxe the board will NOT recover gracefully as ASUS, Gigabyte, DFI, and other Enthusiast boards normally manage. If you try to do some serious overclocking on this board you will quickly learn where the clear CMOS jumper is located and how to pop out the battery. In a failed OC on BadAxe, clearing CMOS and removing the battery are the only way to recover and reboot. This makes overclocking with BadAxe a very frustrating experience.
It is perhaps best to view the Intel 975Xbx as an incredibly stable motherboard built to last a very long time, as Intel motherboards normally are. It also allows overclocking, but the Intel BadAxe is not really set up for the kind of overclocking serious overclockers demand. It's is a difficult board to bring back from a failed OC.
Intel motherboards remain the standard against which others are measured in stock performance, and BadAxe is a fast and stable board running Core 2 Duo. It is not, though, a speed demon compared to the ASUS or other solid 975X motherboards as we have sometimes seen from Intel in the past.
Those who could care less about overclocking, or who only want to overclock modestly will likely be very pleased with BadAxe performance. So will overclockers who only want to overclock with multipliers since BadAxe supports the unlocked X6800 processor with multipliers both up and down from the stock 11x.
Overclocking
Perhaps because overclocking was so difficult compared to other boards in this Buyers Guide we only managed to reach a 22% overclock with the E6700, or 3.25GHz. We reached a similar 21% OC with the 2.93GHz X6800, reaching a stable 3.55GHz.
Others who have modified the BadAxe board, or who have a much greater tolerance to OC pain than we do, have reached much higher overclocks than we reached in our tests. However, two editors, with different boards and processors, reached almost the same results with BadAxe.
If you want to run your 2.93 or E6600 at 4GHz without a huge hassle then choose another motherboard, like the ASUS P5W-DH Deluxe. If you want to run almost forever with no problems then choose BadAxe. You can even take BadAxe to stratospheric overclocks, but that requires hardware modifications.
Basic Features
| Intel 975XBX | |
| 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 (Passive) Cooling |
| Front Side Bus | 1333 / 1067 / 800 / 533 MHz |
| Host Burn-In Mode | 0 - 50% (in 1 percent increments) |
| Memory Speeds | Default, DDR2 333, 400, 533, 667, and 800MHz |
| PCI Bus Speeds | Default, 40.00MHz |
| PCIe Speeds | Default, 101.32, 102.64, 103.96, 105.28, 106.6, 107.92, 109.24MHz |
| Set Processor Multiplier | 6 to 40 (Depends on CPU) in 1X increments |
| Core Voltage | Default, 1.2750V to 1.6000V (in 0.0125V increments) |
| DRAM Voltage | Default, 1.80V, 1.90V, 2.00V, 2.10V, 2.20V |
| MCH Chipset Voltage | Default, 1.525V, 1.600V, 1.650V, 1.725V |
| FSB Termination Voltage | Default, 1.271V, 1.333V, 1.395V |
| 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 |
| Expansion Slots | 2 PCIe X16 (operates in 1X16 and 1X8 or 2X8 mode) 1 PCIe X16 (operates in X4 mode) 2 PCI 2.3 |
| Onboard SATA | 4 SATA 3Gb/s by ICH7R |
| Onboard IDE | 1 UltraDMA 100/66/33 (2 Drives) by ICH7R |
| SATA/IDE RAID | Intel ICH7R: (4) x SATA 3Gb/s RAID 0, RAID 1, RAID 5, RAID 10, and Intel Matrix Storage technology Silicon Image SiI3114: (4) x SATA 1.5Gb/s RAID 0, RAID 1, RAID 0+1 (operates on PCI bus) |
| Onboard USB 2.0/IEEE-1394 | 8 USB2.0 ports by ICH7R 2 IEEE 1394a FireWire Ports by TI TSB43AB23 |
| Onboard LAN | Intel 82573L PCIe X1 Gb LAN |
| Onboard Audio | Sigmatel STAC9221D, 8-channel capable HD Audio Codec featuring Dolby Master Studio technology |
| Power Connectors | 24-pin ATX 8-pin EATX 12V 4-pin Molex Plug |
| Back Panel I/O Ports | 1 x PS/2 Keyboard 1 x PS/2 Mouse 1 x Parallel 1 x Serial 1 x Audio I/O Panel 1 x Optical S/PDIF Out Port 1 x Coaxial S/PDIF Out Port 1 x RJ45 4 x USB |
| BIOS Revision | Intel 6/20/2006 |
The Intel 975XBX, known by most as the BadAxe, was the first motherboard to officially support Core 2 Duo. AnandTech reviewed the board in January 2006 at Intel D975XBX: Intel brings their BadAxe to Market, but that early board was not really compatible with the just-launched Core 2 Duo processors. For Conroe compatibility the BadAxe must be Revision 0304 or later.
 |
| Click to enlarge |
Since BadAxe was the only Conroe choice during much of the developmental testing, it quickly gained a list of user modifications that seems almost endless. The 975XBX is an Intel board that is actually capable of being overclocked and that actually has some decent adjustment options in the BIOS. This is not something you expect from Intel boards in the past, but it has definitely been an increasing part of Intel's top-end offerings.
The current BadAxe board has a few improved options in the BIOS, like overclock options to 50% instead of 30%, but it is otherwise still the exact same board AT reviewed this past January. For more information on the board please go to the AnandTech BadAxe review.
Basic Performance
While Intel does provide options that enable overclocking BadAxe, they still have a lot to learn about producing a motherboard for the Enthusiast. If you set a bad overclock on the BadAxe the board will NOT recover gracefully as ASUS, Gigabyte, DFI, and other Enthusiast boards normally manage. If you try to do some serious overclocking on this board you will quickly learn where the clear CMOS jumper is located and how to pop out the battery. In a failed OC on BadAxe, clearing CMOS and removing the battery are the only way to recover and reboot. This makes overclocking with BadAxe a very frustrating experience.
It is perhaps best to view the Intel 975Xbx as an incredibly stable motherboard built to last a very long time, as Intel motherboards normally are. It also allows overclocking, but the Intel BadAxe is not really set up for the kind of overclocking serious overclockers demand. It's is a difficult board to bring back from a failed OC.
Intel motherboards remain the standard against which others are measured in stock performance, and BadAxe is a fast and stable board running Core 2 Duo. It is not, though, a speed demon compared to the ASUS or other solid 975X motherboards as we have sometimes seen from Intel in the past.
Those who could care less about overclocking, or who only want to overclock modestly will likely be very pleased with BadAxe performance. So will overclockers who only want to overclock with multipliers since BadAxe supports the unlocked X6800 processor with multipliers both up and down from the stock 11x.
Overclocking
| Intel 975XBX Overclocking Testbed |
|
| Processor: | Intel Core 2 Duo E6700 Dual Core, 2.67GHz, 4MB Unified Cache 1066FSB, 10x Multiplier |
| CPU Voltage: | 1.395v (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) |
325x10 3250MHz (+22%) |
Perhaps because overclocking was so difficult compared to other boards in this Buyers Guide we only managed to reach a 22% overclock with the E6700, or 3.25GHz. We reached a similar 21% OC with the 2.93GHz X6800, reaching a stable 3.55GHz.
Others who have modified the BadAxe board, or who have a much greater tolerance to OC pain than we do, have reached much higher overclocks than we reached in our tests. However, two editors, with different boards and processors, reached almost the same results with BadAxe.
If you want to run your 2.93 or E6600 at 4GHz without a huge hassle then choose another motherboard, like the ASUS P5W-DH Deluxe. If you want to run almost forever with no problems then choose BadAxe. You can even take BadAxe to stratospheric overclocks, but that requires hardware modifications.
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Gary Key - Wednesday, July 19, 2006 - link
We are looking forward to the value SLI boards in early August. Prices will range on average from $95 to $120. As soon as we can post a review up on these boards, it will be done. :)EODetroit - Wednesday, July 19, 2006 - link
Can Anandtech max out the memory and make sure these systems are stable in 64 bit Windows OS'? I'd really like to make sure that there's no time bombs if I buy 8GB of ram that will force me to RMA a lot of stuff. If you don't have 2GB sticks, at least test with 4x1GB. The motherboards advertise that they support 8GB, but no one ever seems to check them on it. If Anandtech could do that, it would be a great help.Thanks!
Genx87 - Wednesday, July 19, 2006 - link
Not bad for an older chipset to win the SLI benchmarks.I am curious what the new chipset can do!
supremelaw - Wednesday, July 19, 2006 - link
Dear Gary and Wesley,I'm thinking back to about 8 months ago,
when we first started assembling our
ASUS P5WD2 Premium motherboard
(which has recently become our primary
production machine).
We offered our assistance at the ASUS
User Forum, because a LOT of users
were stumbling over the IT8211F IDE
controller, which requires a device driver
to be extracted from the Support CD.
I fear that P965 motherboards are headed
for the same serious problems, particularly
if motherboards add an on-board IDE
controller that is NOT "native" e.g. JMicron.
Here's the scenario: a less-than-expert
user sees a PATA IDE port, and thinks
he can use (or recycle) a PATA optical
drive to run Windows Setup. And, he's
probably read (or heard) the stories about
SATA optical drives that just don't work
with Windows Setup.
Is this user headed for major problems?
I think so.
And here's why ...
If the BIOS has not been modified to
support native PATA / IDE optical devices,
a Catch-22 results: you need the device
driver from the Support CD, but you can't
read the Support CD without the device
driver -- not if the optical device is wired
to that on-board IDE controller.
If you want confirmation of this problem,
check out the ASUS User Forum for the
P5WD2 Premium, particularly the numerous
complaints Users were posting about the
ITE IT8211F on-board IDE controller.
To make this problem even more exasperating,
the User Manual failed to mention that the
F6 sequence will load the ITE driver during
Windows Setup, BUT one can STILL not
run Windows Setup from an optical drive
wired to that ITE controller. The device driver
can be added AFTER Windows XP is
successfully installed.
Fortunately, the P5WD2 Premium has a
BLUE native IDE port as well, and we
avoided all of these problems by running
Windows Setup from a PATA optical drive
wired to that BLUE native IDE port.
Thanks for all the great reviews!
Sincerely yours,
/s/ Paul Andrew Mitchell
Webmaster, Supreme Law Library
http://www.supremelaw.org/">http://www.supremelaw.org/
Gary Key - Wednesday, July 19, 2006 - link
Hi Paul,The scenario you listed is a very real possibility and as you have noted has existed in past boards. In fact, I was on the phone with Wes when our first P965 was fired up and the Optical Drive was not recognized. Of course, I had a few choice words to say about the situation. The only way to load the new OS image and Driver CD was through the Optical drive and that was not going to happen in this case. I ended up loading a new image on a drive in another system, installing the inf and network drivers in a folder, and then moving this drive to the new machine. The issue was a very early bios that did not support the hooks from the external IDE chipset into the ICH8. We received an updated bios a few days later and all was well from that point forward.
Since Intel has basically left a "lane" open in the ICH8 to support IDE (much in the same way as the LAN controller logic, being real simple here to keep it short), then the only issue is to ensure the bios has support for the IDE link. We have not seen this issue at all in the latest boards that we have received and have been told it will not occur in shipping boards. While most suppliers are going with the JMicron solution, Biostar included the VIA VT6410 that turned out to offer excellent performance in our upcoming storage tests. I hope this helps and thank you for your comments today.
:)
Andy4504 - Wednesday, July 19, 2006 - link
I was most surprized by the poor BadAxe (X975XBX) Overclocking. Because the memory controller isn't directly tied to the FSB speeds, the fact that you cannot incrase the memory voltage without hardware modification should make little / no difference in CPU overclocking.I personally own a X975XBX with an 805D. I've found that the best overclocking isn't done by selecting +30% OR + any percent for that matter, but rather choosing the higher bus speed, then selecting an underclock from that higher speed.
With full access to the memory multiplier range, most any ratio could be set.
Wesley Fink - Wednesday, July 19, 2006 - link
Conroe runs at 1066 FSB speed. 1333 support has been in and out of the different BIOS revisions. So with Conroe you can select no higher bus speed at worst, or a modest 1333 at best. 805D runs at 533 (166 quad) so you have differnt options. It really isn't possible to select higher bus speeds and clock down with Conroe on the BadAxe.Paladin165 - Wednesday, July 19, 2006 - link
In the review you mention that the 7600GT would work with the cheap ASrock board, I was thinking about going with this setup (if another ultra-cheap board doesn't come out soon). I was wondering, how much impact would the 4x PCIex speed have on the 7600GT? Are there any situations where it would choke off performance? Does it provide enough power?This cheap board seems like a good buy because new motherboards are going to be coming out so rapidly over the next six months it doesn't make sense to drop $250 on a bleeding-edge board.
Gary Key - Thursday, July 20, 2006 - link
The 7600GT works fine. I am trying to procure a 7600GS PCIe and AGP cards to directly compare the video performance on the board. Hopefully, I will have both cards before the full review goes up. We also have two other ASRock boards that are under $75 arriving shortly. I think the performance with the 7600GT will be fine unless you like to play Oblivion and even with the PCIe x4 interface you will not notice a real difference with this card.Paladin165 - Thursday, July 20, 2006 - link
"I think the performance with the 7600GT will be fine unless you like to play Oblivion"!!!
Oblivion is exactly what I want to play! What is it about this setup that hurts Oblivion performance?