ROG Connect

ROG Connect is a feature allows on the fly overclocking from another system through an USB cable
ROG Connect button now serves with one more function.
- Enable ROG Connect function when light up
- BIOS Flashback (Rename bios file to R4E.ROM, store in pendrive and plug into white color USB port, press and hold ROG Connect for 4 seconds)
- Switches keyboard support to OC Key

OC Key

OC key is completely new stuff featuring on Rampage IV Extreme, similarly to ROG Connect, tweaking on the fly, WITHOUT SOFTWARE OR A RUNNING PC!

System off(left) and system on(right)

Standby power is enough to power up OC Key, pressing ROG Connect button for 3 seconds will bring up the OSD display regardless system is running or not.
During POST, OSD Poster will displayed on top with debug code and its information.

Voltage, frequencies, temperatures and fan speeds are being monitored real-time. There will be 2 monitor type, extreme and normal. In extreme display mode, subzero sense, vGPU1 and vGPU2 instead of Dram Voltage and VTT in normal display mode.

It also come with option of turning system on/off, reset or clear bios

Note:
ONLY DVI/HDMI are supported, maximum resolution of 1960×1200.
Keyboard need to be plugged into P/S2 port or white USB port.
OC Key is totally independent device, it won’t have any impact to system performance.

Overclocking

Another major differences with sandy bridge is bclk overclocking. It is similar to sandy bridge in some sense though, for sandy bridge, BCLK = PCIE Frequency, however, for Sandy bridge-e, CPU has 4 straps, 100, 125, 167 and 250. When you select 125 BCLK with 125 strap, your PCIE Frequency is BCLK/Strap, in this case, 100MHz.
Due to PCIE frequency limitation, we can get 10% range of over/underclocking at most based on selected CPU strap.
e.g.
137.5/125 = 110MHz
112.5/125 = 90MHz
183.7/167 = 110MHz
150.3/167 = 90MHz

CPU Overclocking

• Normal OC Profile : For 24/7 stability overclocker who like to improve performance for day-to-day usages, it does similar job with CPU level up, but you will see what actual settings are changed and its value.
• Extreme OC Profile (Low Current) : For Extreme OC with a decent CPU using either air or LN2 cooling, this sets sweet-spot settings for extreme OC while sinks current away to preserve the life-span of the CPU.
• Extreme OC Profile (High Current) : Same as Low Current, but squeeze more frequency out of it.

Memory Overclocking

• Elpida Hyper Profile was defined to allow better DRAM OC margin for DRAM
  modules based on Elpida Hyper chips, the timings are made to suit the worse modules
• PSC Profile was defined to allow better DRAM OC margin for DRAM modules
  based on PSC chips, with both tight and loose set of timing option.
• RAW MHZ Profile was defined to allow better DRAM frequency OC margin, ignoring
  timing and latencies.