Contact between the heatsink and motherboard components appear to be good, leaving deep impressions on the thermal interface pads and materials. The MOSFETs belonging to the processor’s Uncore portion is cooled seperately by a small heatsink.
With the MOSFET / IOH / SB heatsink removed, we are able to take a closer look at the G1-Killer Assassin’s power delivery. GIGABYTE and Intersil have maintained a very close working relationship, which dates back even to the Intel Pentium 4 era. For the Assassin, power delivery is handled by a variety of Intersil power management ICs.
The 16-phase processor core power handled by a ISL6336G PWM controller (located at the far right just below the last choke) with light load efficiency enhancement and current monitoring. Under light loads or idling conditions, the PWM controller can power down phases for energy saving.
GIGABYTE is using Vishay SiC769CD integrated Driver-MOSFETs (DrMOS). There is one DrMOS per phase and we see 12 of them on the top side of the board.
The ISL6312 four-phase PWM controller with integrated MOSFET drivers (located on the far left just below the cluster of three chokes) handles voltage regulation to the Uncore portion of the processor.
Flipping the board over, we see the remaining four DrMOS belonging to the processor core voltage regulation module (VRM) and two pairs of MOSFETs from the Uncore VRM.
As this picture was taken before removing the motherboard’s heatsink, we can see that the massive chunk of aluminium is held down by spring-loaded screws which offers better mounting pressure.
The Intel X58 Express I/O Hub (IOH) has two-phase power (located nearest to the first pair of memory slots), driven by a ISL6322G PWM controller with integrated MOSFET drivers and phase dropping support for power saving.
Lastly, the memory has two-phase power as well, controlled by another ISL6322G located beside the middle pair of memory slots. The related MOSFETs and chokes however, are found to the right of the 24-pin ATX connector.
While GIGABYTE has repeatedly mentioned that the G1-Killer is targeted solely at gamers and those who wish to overclock should look at their high-performance and overclocking-oriented models, we believe that the Assassin is well-equipped to satisfy enthusiasts who want the best of both worlds.