ASUS ROG Rampage Formula: Why we were wrong about the Intel X48
by Kris Boughton on January 25, 2008 4:30 AM EST- Posted in
- Motherboards
Board Layout, Features and Specifications
The ASUS Rampage Formula makes use of a beefy 8-phase PWM solution. The copper heatsink covering the MOSFETS is actually not thermally coupled to the Northbridge or the Southbridge as the cooling solution consists of two separate blocks. The hold-down mechanism for the X48's high quality heatsink is comprised of four tension screws attached to a backplate on the opposite side of the board. Besides changing the thermal paste ASUS utilized, we feel there is nothing that needs modification by the end user as long as overclocking aspirations are within reason.
Two full x16 PCI-E 2.0 slots are available for official CrossFire support and the spacing is appropriate. We would have liked an additional PCI slot, for a total of three, instead of the three x1 PCI-E 1.x slots.
Six onboard SATA headers are on the right side of the board, each at 90 degree angles. This made inserting and removing cables easy, even with two full-length video cards installed.
One feature we particularly like is the volt-minder LEDs - one each for the CPU, Northbridge, Southbridge, and memory slots. Each can be one of three colors - green, yellow, or red - and they are useful for determining at a glance the approximate voltage being fed to each component. Green represents "safe" voltages, yellow is elevated (high), and red means "crazy high." Crazy high is just that too, as the board won't set the light red for the CPU voltage until it eclipses about 2.025V.
| ASUS R.O.G. Rampage Formula | |
| Market Segment | Gamer / Extreme Performance - $299.99 (estimated) |
| CPU Interface | Socket T (LGA-775) |
| CPU Support | LGA775-based Core2 Duo, Core2 Extreme, or Core2 Quad recommended, including next-generation 45nm compatibility (06/05B/05A processors) |
| Chipset | Intel X48 Northbridge (MCH) and ICH9R Southbridge |
| CPU Clock Multiplier | 6x ~ 11x, downward adjustable for Core2, upward to 31x for Extreme, half-multiplier support for 45nm processors |
| Front Side Bus Speeds | Auto, 200 ~ 800 in 1MHz increments |
| System Bus Speeds | 1600/1333/1066/800 (MHz) with Official DDR-1066 Support |
| DDR2 Memory Dividers | 1:1, 6:5, 5:4, 4:3, 3:2, 8:5, 5:3, and 2:1 (dependent upon strap setting) |
| FSB Strap | Auto, 200, 266, 333, 400 |
| PCIe Speeds | Auto, 100MHz ~ 180MHz |
| PCI Speeds | Locked at 33.33MHz |
| DRAM Voltage | Auto, 1.80V ~ 3.40V in 0.02V increments, 1.80V standard |
| DRAM CLK/CMD Skew CA/CB | Auto, Manual (Advance/Delay 50ps ~ 350ps in 50ps increments) |
| DRAM Timing Control | Auto, Manual - 20 DRAM Timing Options (tCL, tRCD, tRP, tRAS, tRFC + 15 sub-timings) |
| DRAM Command Rate | Auto, 1N, 2N |
| DRAM Static Read Control | Auto, Enabled, Disabled |
| Ai Clock Twister | Auto, Light, Moderate, Strong |
| Ai Transaction Booster | Auto, Manual |
| Common Performance Level | 1 ~ 31 (settings above 14 prevent POST) |
| CH A/B Phase Pull-In | Based on Memory Divider, All Phases Adjustable (Enabled/Disabled) |
| Core Voltage | Auto, 1.10000 to 1.60000 in 0.00625V increments then 0.05V increments |
| CPU PLL Voltage | Auto, 1.50 ~ 3.00v in 0.02V increments, 1.50V standard |
| FSB Termination Voltage | Auto, 1.20V to 2.00V in 0.02V increments, 1.20V standard |
| North Bridge Voltage | Auto, 1.25V ~ 1.85V in 0.02V increments, 1.25v standard |
| South Bridge Voltage | Auto, 1.050V ~ 1.225V in 0.025V increments, 1.050V standard |
| SB 1.5V Voltage | Auto, 1.50V ~ 2.05V in 0.05V increments, 1.50V standard |
| Loadline Calibration | Auto, Enabled, Disabled |
| CPU Voltage Reference | Auto, x0.63, x0.61, x0.59, x0.57 |
| NB Voltage Reference | Auto, x0.67, x0.63, x0.60, x0.57, x0.56, x0.53, x0.51, x0.49 |
| Memory Slots | Four 240-pin DDR2 DIMM Slots Dual-Channel Configuration Regular Unbuffered, non-ECC DDR2 Memory to 8GB Total |
| Expansion Slots | 2 - PCIe 2.0 x16, Supports ATI CrossFire
Technology 3 - PCIe (1.x) x1, (1) is Compatible with Add-in Audio Card 2 - PCI Slot 2.2 |
| Onboard SATA RAID | 6 SATA 3Gbps Ports - ICH9R (RAID 0, 1, 5, 10) |
| Onboard IDE (PATA) | JMicron JMB368 PATA Controller (up to two UDMA 133/100/66 devices) |
| Onboard USB 2.0/IEEE-1394 | 12 USB 2.0 Ports - (6) I/O Panel - (6) via
Headers 2 IEEE-1394(a) Ports - (1) I/O Panel, (1) via Header |
| Onboard LAN (with Teaming) | Realtek RTL8110SC - PCI Gigabit Ethernet
controller Marvell 88E8056 PCI Express Gigabit Ethernet controller |
| Onboard Audio | ADI 1988B - 8-channel HD Audio CODEC |
| Power Connectors | ATX 24-pin, 8-pin ATX 12V |
| I/O Panel | 1 x PS/2 Keyboard 2 x SPDIF - (1) Optical Out, (1) Coaxial Out 1 x IEEE-1394a 2 x RJ-45 (LAN) 6 x USB 2.0/1.1 1 Clear CMOS Switch |
| Fan Headers | 8 - (1) CPU, (1) Power, (3) Chassis, (3) Optional/Misc. |
| Fan Control | CPU and Chassis Fan Control via BIOS/Extreme Tweaker, PC Probe II monitoring |
| BIOS Revision | v0108 |
| Board Revision | 1.03G |
The ASUS Rampage Formula provides an impressive range of setting specifications. We would go so far as to say that more than a few of these are simply ridiculously high; however, there are sure to be a few people that require these options. A couple of the higher settings to pay attention to: CPU voltage well above 2.0V, CPU PLL voltage to 3.0V (sure to kill your chip super quick), FSB Termination voltage to around 2.0V, and DRAM voltages over 3.4V. While we certainly must commend ASUS on their fine range of control we also feel the need to strongly caution users when working with some of these settings. It's entirely possible to damage or destroy your chipset, CPU, or memory when moving to the extreme limits of these ranges; sometimes less is more.
As we have discussed before Loadline Calibration is best left disabled, especially when using the newer 45nm CPUs. Our testing has shown these settings induce power instabilities, even when using lower voltages. In addition, when enabled the option sometimes requires more CPU voltage than would otherwise be necessary, meaning increased power dissipation and higher temperatures.
Of note, the Rampage Formula allows for half-multiplier usage. This is particularly useful when working in the higher FSB ranges. Because all Core 2 Duo/Quad CPUs are downward unlocked, every half multiplier between the processor default value and 6 can be used, with the exception of 6.5x. For the Extreme processors, this limitation has been relaxed allowing for multipliers as high as 31x in half steps. Besides providing finer CPU frequency control, half-multipliers permit a wider choice of final multiplier/FSB combinations, which can help when choosing the best operating point for the processor and memory. Now that we have experienced what these new values have to offer, it will be hard to work with anything else.
As we pointed out before, "Ai Transaction Booster" is completely revamped for this board series. Setting this option to manual allows the user to take full control of the "Common Performance Level", meaning that all memory phases will baseline at the value as set. Each individual phase can then be "pulled-in" or left as is. "Pulling-in" a phase reduces just that phase's associated tRD value (performance level) by one. Like memory timings, lower values are tighter and thus provide better memory read performance and lower latencies. If all phases are pulled-in, this is the equivalent of selecting the next lower common performance level and performs identically to this new setting. Thus, pulling-in particular phases can allow the user to affect a minor performance improvement if selecting the next lower common performance level is not possible.
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73 Comments
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DragonStefan - Tuesday, June 9, 2009 - link
Hello all.I have:
- motherboard: ASUS Rampage Formula (Intel X48) (logical) and
- Corsair XMS2 Dominator Series 2x2048MB Kit PC2-8500 CL5-5-5-15 (TWIN2X4096-8500C5D)
Should i go for the following setup in bios:
FSB: 400
tRD: 5
Trd: 12,5
Divider: 3:2
tCL: 5
VDDR: High
Allowed: Yes.
Or should i go for a different setup?
If i understand correctly, this is possible..
What do i forget?
I made the calculation, and the answer of the Question if it is possible Yes or No, is 1,67 > 1,33. 1,67 is higher than 1,33. So yes..
Greets From DS
danderson00 - Thursday, October 23, 2008 - link
Hi,I realise this article is quite old now, but found it very useful for tuning my Rampage Formula. Have achieved significantly increased memory performance from this setting. The board seems to configure them fairly well on the auto setting, but there are some cases where manually tweaking them can give a good performance boost.
I am curious about one thing - I would have thought that running a 1:1 divider would allow the lowest tRD value as the two clocks are running at the same speed. Data should be able to be passed between the two buses without delay, whereas if the memory clock is running faster, it might need the delay to prevent 'overlapping' with the previous data transfer. However, according to the formula (and indeed a couple of quick tests confirm it), a 1:1 divider is actually the worst for tRD, the wider the ratio the better.
Any ideas why this is?
Great article anyways!
Dale
Maxxxx - Sunday, June 14, 2009 - link
Yes, you are right about 1:1 divider and tRD. This article incorrectly describes work of the memory controller.geok1ng - Sunday, August 3, 2008 - link
I have a P5WDH a 975X mobo. if i am understand correctly this chipset would apply the TRD from the basic table and my best options would be a Trd of 6 or 8? Is there any way of knowing what Trd number is being applyed? I am running an E4300 at 9x329Mhz and 4 1GB sticks of DDR1100 at 987Mhz Cas 5/6/6/18/21. everest gave me a memo latency of 55.5ns ( better than quite a few 45nm/P35 owners here). Any use going for the Trd 6 option (8:5 divider i believe) since neither my my mobo can reach FSB above 1333 nor my memo can go above 1000mhz and keeping CAS 5 ( it is rated at cas 5/7/7/25/32 but the P5WDH just cant go above 5/6/6/6/18/21). Using a 8:5 divider bellow 1000Mhz memory mean runing the CPU at 2,7Ghz...and using crazy DDR/MCH voltages.Sarsbaby - Wednesday, July 16, 2008 - link
Wow, I just learned alot, I think.Very nice article! Well written and presented.
I'll definately have to clear my CMOS for this one.
jamstan - Friday, July 11, 2008 - link
I would have liked a review of the board itself instead of page after page about clocking. I have this board ready to build my rig today with 2 4870s in CF and I would have liked to read about the crossfire setup, the sound card, etc instead of page after page about clocking. Althou informative I feel the review should have remained focused on the board itself and the clocking crap should have been in a different article. It's a nice feature on this board but its like doing a review of a Corvette and wasting the whole review on its transmission.Sarsbaby - Wednesday, July 16, 2008 - link
You know, this is only one of many reviews for this board, and only one of many on this forum.Try some more searching, and maybe educate yourself more before calling most of this article "Crap". This is probably one of the most useful articles on this motherboard I have found.
With all these new options open to ROG owners, i'm glad someone is taking the time to explain what they mean and why we have paid for them.
And have you ever re-built a transmision? Or tuned an LSD? It's alot more complicated than you think apparently.
DEFLORATOR - Tuesday, May 27, 2008 - link
Why does the author says that the board revision is 1.03G while it is clearly seen on the photoes that it's 1.00G (imprinted between PCIe slots)? Please owners of the board confirm that 1.00G is the latest revision of Rampage Formula (gonna order that tomorrow)viqarqadir2 - Monday, April 21, 2008 - link
HelloI am very new to this stuff and havent been able to make a lot of sense of the configurations despite reading the article several times.
I have the following setup:
Intel Q6600@2.4 Ghertz
Kingston Ram 8500 (5.5.15) 1X4 Gigs - 1066Mh
XFX Geforce 8800GTX XXX edition. (I guess this doesnt matter)
What sort of configuration should I apply?
I also wanted to know if someone has had problems with the MB temperature and whether 51 Centigrades after playing STALKER for about one hour is normal. Any help will be appreciated.
viqarqadir2 - Thursday, April 24, 2008 - link
hmm...I dont know if I've done something wrong but for some reason, 3dMark is showing the memory at 1.9 Ghertz. It's a DDR2 rated at 1066 and I am running it at (according to my calculation) 1000.
The pc feels ridiculously fast. All MB lights are green. The 3d Mark app is giving a score of about 11000. I am not a techie but is it possible that I have discovered something? Is there a way to post screenshots in the comments area?