Every once in awhile, something comes along that is simply brilliant in its simplicity. For ASUS, that time could be now. ASUS plans to continue in their tradition of early adoption of new chipsets with a mid-February release of their upcoming Rampage Formula motherboard, a board that will make use of Intel's recently announced X48 Express chipset and DDR2 memory. Although DDR3 has been available for purchase for many months now, exceedingly low DDR2 prices have made purchasing 4GB or even 8GB of memory quite affordable - the latter still costing less than 2GB of good DDR3 memory. Coupled with the fact that the Rampage Formula provides a relatively easy upgrade path for current DDR2 owners, we can see why this board will be an attractive choice for anyone looking to build their next high-performance gaming system.

Like other recent offerings from ASUS, the Rampage Formula is part of the Republic of Gamers (ROG) line of motherboards, aimed squarely at the enthusiast looking to tune all levels of system control in order to extract every ounce of possible performance. We were a little surprised to see that ASUS seems to have needed very little engineering work in order to make use of Intel's higher-binned X48 chipset - the Rampage Formula and the currently available Maximus Formula (which uses the X38) share almost everything in common with the exception of the Northbridge. On one hand this makes sense, as the X48 is little more than an X38 binned for ultimate performance; on the other hand we would have liked to see a few additional improvements in component choices and layout.

Because of this, those that already own an X38 ASUS motherboard may find no compelling reason to upgrade. However, gamers ready for a complete system overhaul looking to build with the absolute best quality board should strongly consider the Rampage Formula. Compatibility was excellent with no real gripes to speak of - the board flawlessly made use of every CPU and memory kit we installed for testing. Coupled with one of Intel's new 45nm quad-core or dual-core CPUs and a pair of ATI 3000-series Radeon cards in CrossFire, this board provides a solid centerpiece for a formidable gaming rig.

We would be delinquent in not noting the impending release of the Rampage Formula's DDR3-based companion, the Rampage Extreme. We anxiously await our chance to bring you an early first-look at what it has to offer. We fully expect that it will best even the most refined X48/DDR2 board. Our experience has always been that the X38/X48 chipsets simply work better when teamed with DDR3 memory. For whatever reason, we find that for absolute ease of overclock and rock-solid stability nothing beats an X38/X48 DDR3 board. Unfortunately, DDR3 prices can be a rather large obstacle for some, especially when dealing with the higher speed bins.

For now, we are happy to report that our early dealings with the ASUS Rampage Formula have been extremely satisfying, especially considering the relatively short amount of time given to BIOS maturity. In fact, we feel there are no significant obstacles impeding the release of this board. Additionally, we must applaud ASUS for the industry-leading effort they have put forth in incorporating a few new settings into the BIOS that give the user the ability to easily unlock otherwise hidden memory performance with just a quick finger twitch.

What are these settings you ask? Simply put, the ability to select a MCH Read Delay (tRD) from within the BIOS, as well as a means for adjusting the timing of each individual memory phase associated with the selected memory divider. You may know this setting by its more common name, often referred to as "Performance Level". While some motherboard makers have been making use of these settings for quite some time, never before has it been as de-obfuscated as it is today.

Hopefully we can finally say goodbye to the frustration of blindly adjusting these settings with the hopes of achieving the desired end goal - an accomplishment we can all appreciate. Our hopes are that other vendors follow suit and work quickly to update their offerings to provide this level of control in a similar manner. For those that are interested, we will touch on the performance improvements that can be seen as well as the other implications involved with making use of these settings a little later on.

With X48, the tier one giants - ASUS included - are gearing up for another round of lightning-fast motherboard releases. It appears as though they are now simply waiting on the green flag from Intel before they release these boards to the world. The fickle-free operation and high probability of success when overclocking that comes with teaming an Intel processor with an Intel chipset makes picking up an ASUS Rampage Formula an easy choice. One thing's for sure, ASUS is on a roll, and they don't appear to be slowing down for anyone.

Board Layout, Features and Specifications


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  • kjboughton - Sunday, January 27, 2008 - link

    The rules as defined may not apply exactly as provided for P35. The equations have been tested to be true for X38/X48 but additional testing is still needed on P35 in order to validate the results. Reply
  • Super Nade - Saturday, January 26, 2008 - link


    I love the technical depth of the article. Outstanding writeup! I hope you will NOT dumb down future articles as this is how, IMO a review should be written.

  • Eric Rekut - Saturday, January 26, 2008 - link

    Great article! I have a question, is x48 faster in super-pi than p35/x38? Reply
  • Rajinder Gill - Saturday, January 26, 2008 - link


    In general the X38/X48 chipset outscores the P35 in Super Pi. The x48 can/will pull ahead of the X38 very marginally IF it can handle a lower overall tRD with a higher FSB combination and tighter memory sub-timing ranges - within an available level of Northbridge voltage.

  • Rob94hawk - Saturday, January 26, 2008 - link

    I would love to see you guys do benchmarking and overclocking with the QX9770+DDR3 1800 with this mobo. Reply
  • Rajinder Gill - Saturday, January 26, 2008 - link

    Hi Rob,

    Kris will be testing the Rampage Extreme soon (with DDR3). The 9770's only show a little more prowess than QX9650's under LN2 cooling (in some instances - not always). With cascade/water/air cooling there's little to separate the QX9650 from the QX9770 (at least in my experience with both processors thus far).


  • enigma1997 - Saturday, January 26, 2008 - link

    Another excellent article after the QX9650 O/C one. Congratulations!!

    I have a few questions: What ram did you use to achieve the amazingly high bandwidth result (the one that goes with the 450FSB and tRD 5)? I understand you are using a divider of 3:2 and CAS5, so I expect the DDR2 speed should be at 10800!!

    Also, I am not sure how you can get a memory read of >9000MB/s with tRD 5. I have a pair of G.Skill F2-8000PHU2-2GBHZ 4-4-4-5 and a DFI X38-T2R motherboard. I set it up with a QX9650 with tRD/FSB/ram timing identical to yours, but I only get around 8800MB/s. Note that the CPU runs at 3000Mhz.

    Thanks for the article and your answers to my questions :)
  • kjboughton - Sunday, January 27, 2008 - link

    Memory used for the incredible 450FSB/tRD 5 result was OCZ DDR2 PC-9200 Reaper (2GB kit).

    Regarding the testing you did at equivalent speeds, contrary to popular belief, CPU speed does influence both system memory read latency and bandwidth (add 16 clocks of whatever the CPU's Tcycle is to total system latency - about an extra 1.33ns going from 4GHz, where I tested, down to 3GHz uses in your system). This is certainly enough to reduce your BW results down below 9GB/s.
  • Jodiuh - Saturday, January 26, 2008 - link

    "we feel there is nothing that needs modification by the end user as long as overclocking aspirations are within reason."

    The current Maximus series requires a bit of work (heatgun, fridge) to pull this off and replace with TIM of choice. Also I noticed a 7C drop on the bench when adding a 5CFM 40mm to the NB. Would you mind fleshing out the comment a bit more?

    Thanks for the very thorough information in the article!
  • jedisoulfly - Friday, January 25, 2008 - link

    there is a patriot viper ddr3 1600 cl7 kit at newegg for $295 (out of stock at time of this post) that is dramatically higher than good 800 ddr2 or even 1066 but just over a year ago ddr2 800 2gb kits were going for that price. I think once NV and AMD start making chip sets that support ddr3 the prices will start to come down...hopefully Reply

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