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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jonmcguffin - Friday, July 21, 2006 - link
Actually, heck, I'm not much of an overclocker at all (I know that makes me the minority here). I'm looking at the Core 2 6600 at its native 2.4Ghz, 4Mb L2 Cache & 1066Mhz BUS Speed and figure that should be seriously fine for me.In regards to memory, I'd much rather purchase 2Gig's @ $180.00 than at $450.00 and since I'm not overclocking that shouldn't be a problem. But what I would have liked to have seen in this article were value sticks rated at DDR2 800Mhz as opposed to 667Mhz. So I anxiously await a "value-ram" roundup article of some sorts to not only show us what memory modules work well in the various mobo's but also which sticks can operate at those frequencies with low timing.
Jon
Wesley Fink - Saturday, July 22, 2006 - link
The Buyers Guide shows all the Value Ram operating at DDR2-800 at 4-3-3-3 at around 2.2V. We also show the timings and voltage of the value Ram at 667, 533, and 400, in addition to 800.jonmcguffin - Sunday, July 23, 2006 - link
Correct, but the ratings from the manufacture don't have those memory module's spec'd at DDR2-800. You were overclocking them essentially. Check out theCorsair 2Gb TWIN2X2048-6400 DDR2-800Mhz set. These two sticks are rated at DDR2, sell for $160 - $170 and run at 5-5-5-12-T1 timings at 1.9V.
I would consider these a good starting point. Again, I'm not necessarily into running anything beyond the manufacture's claims, but for this price, it would seem these memory modules would fit the bill for a lot of users out there.
Jon
Gary Key - Friday, July 21, 2006 - link
All,I received a new beta bios from Abit today. I will be testing it later and will provide a quick update before we publish our final review on the board. Abit has spent considerable time this week testing this bios before release to us and hopefully it will fully address the memory setting issue we first reported in our preview issue.
perpetualdark - Friday, July 21, 2006 - link
I dont know where you priced your motherboards for this review, but I purchased the DFI 975x/g on july 18th from zipzoomfly for $187. It shipped the next day and I should see it today or Monday.Given that the DFI board is available for $62 less than your article shows, I think I made a good choice, since I dont need to overclock or run any high end graphics.
Now I just need to get my hands on a cpu. This is for a work computer, but after things settle out around octoberish I will upgrade my home gaming setup with the conroe. I am playing titan quest right now, and even with a geforce 7950 the game hitches quite a bit in certain areas at most resolutions.. I figure increasing the cpu power will help substantially, at least thats my excuse for upgrading.
Gary Key - Friday, July 21, 2006 - link
The price was taken at the time the article written (17th) based on pricing from three different suppliers that had the board in stock. Now that ZipZoomFly (would assume others shortly) has it in stock at a price point (slightly below) that we had discussed with DFI I will update our article. The 7950GTX has not been qualified on this board yet so performance issues could occur since the required bios optimizations between the board and card are not completed. We really like this motherboard and for the $187 price, it is a great value now and one that should be seriously considered for purchase by early Core 2 Duo buyers. Although, we expected more in the way of overclocking, a very solild 375FSB is nothing to sneeze at and stock performance is excellent. Thank you for the price update! :)Gary Key - Friday, July 21, 2006 - link
Where is the edit button?a very solid.....
Roy2001 - Thursday, July 20, 2006 - link
I am looking for OC a E6600 with 4MB cache to 4Ghz with minimum budget and I never OC my system. So I don't know which value board/RAM would meet the target. I don't care about timing/latency. I would like to see anandtech to publish guides for high performance OCers and value OCers and help us to reach max speed.In addition, I can pickup DDR2-800 RAM priced similar to those 667 RAMs, I don't understand why they are not included in review?
Thanks.
Gary Key - Thursday, July 20, 2006 - link
We will have additional guides in the near future. As for the DDR2-800 memory, we will be looking those modules in a mid-range section and a couple of the lower end that we have tested did not do any better than the high end DDR2-533/667 from a timing viewpoint or a high speed. Getting a E6600 to 4GHz is not that easy with a minimum budget but your suggestions are noted for the next guide. Thank you for the comments. :)Roy2001 - Friday, July 21, 2006 - link
I know minimum budget system won't be easy to hit 4Ghz speed. I am not too sensitive to the money, but I just don't want to spend $450 for best RAM while I can hit 4Ghz with $150 RAM. Same thing happens to motherboard. I don't care 1394 port, optical port, as long as it is stable @4Ghz, I just pick the lowest priced although I can afford a $250 mother board. Hope that helps as I think I am not alone. Thanks for your hard work!