The Industry’s Highest Quality CPU Power Design
GIGABYTE G1-Killer motherboards use industry-leading PowIRstage™ controllers from International Recifier. These 100% digital controllers offer incredible precision in delivering power to the motherboard’s most power-hungry and energy-sensitive components, allowing enthusiasts to get the absolute maximum performance from their next generation Intel® Core™ processors.
Total Solution from
International Rectifier (IR®)
IR® PowIRstage® IC
IR® Digital PWM Controller
   All IR® Digital PWM Controllers
All Digital Power
 CPU                      Memory   

Single Package Design
IR has leveraged it’s world class packaging technology developed for the DirectFET®, improving the thermal capability and layout of the PowIRstage® significantly over that of other MCM packages.
Single Package Design*       VS.     Multi-Chip Design
High Side MOSFET
Driver IC
Other MOSFET layout implementations use a multi-chip, side-by-side arrangement of the high and low side MOSFETs and driver IC, taking up significant board real estate and creating more electrical leakage.
High Side MOSFET
(Traditional MOSFET)
(Traditional MOSFET)
Driver IC
(MOSFET Driver)
Digital PWM Controller and PowIRstage® IC design may vary by model.
Power Stage
(Also known as IR3550 PowIRstage® )
Lower RDS(on) MOSFET
(Also known as WPAK, PowerPAK MOSFET...)
8 pins
(4 right, 4 left)
Traditional MOSFET (Also known as D-Pak MOSFET...)
3 pins
(1 right, 2 left)
Size ratio between objects is constant      

Ultra Cool, Ultra Efficient, Ultra Performance
Traditional MOSFET
IR3550 PowIRstage®
* Testing result for reference only. Results may differ according to system configuration.
* 4 phase IR3550 PowIRstage® with 2x Copper PCB vs. 4 phase traditional MOSFET @ 100A load 10 mins lab testing without heatsink
Cooler temps. = Higher Overclocks
Not enough power
for overclocking
IR3550 PowIRstage® ICs remain cooler than other MOSFET designs, allowing users to overclock to greater levels of performance. Each power component has a maximum thermal operational temperature, and once it is reached, adding more voltage will only result in a failed overclock. Since IR3550 PowIRstages® are able to operate at cooler temperatures at higher voltages than traditional designs, overclockers are able to have more headroom to increase voltages, resulting in higher potential overclocks.
MOSFET Overclocking Stability
Lower RDS(on)
(Also known as WPAK, Power Pak MOSFET...)
Traditional MOSFET
(Also known as D-Pak MOSFET... )

Features and Actual component specifications may vary by model.
Specifications and images are subject to change without notice.
Photos are for reference only.


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