I'm not a fan of having device 
connectors to the left of the CPU socket. The ports there are, the more cables 
have to run in front of the CPU fan which obstructs airflow. Well there are a 
total of six connectors to the right of the CPU Socket it may 
get real busy in front of the processor!
The Main 
ATX power connector is also too close to the 
CPU retention mechanism so it's very difficult to remove the power supply cable once 
it's plugged in.


You probably noticed that P4ES 
only has two DIMM slots, but since the i845 chipset can only address a maximum 
of four banks 
and since almost all the DDR you buy out there is double 
sided, having a third DIMM slot would actually be useless.
FI (Fantastic Interface) 
Panel:
Since the P4ES supports so many different forms of 
portable media (compact flash, secure digital and memory stick) Iwill has 
decided to make things easy on the user and they created the FI Panel. The FI 
panel also has headphone and MIC jacks as well as two USB ports. The secure 
digital and memory stick both communicate to the computer via the USB ports, but 
we were surprised to see that the compact flash uses an IDE interface! After a 
bit of thinking, it donned on me that the compact flash port is also compatible 
with the very large micro drives. 
Iwill's 
first attempt at a multi function I/O front mounted panel is a good one, but it's not exactly 
the prettiest thing to look at. Unless you have a need to use the media 
ports, I can't really see anyone installing this thing onto their computer (it's useful, just 
not that great to look at).
As with the Iwill P4GS, the P4ES is a value oriented 
motherboard and does not support many overclocking options. The P4ES auto 
detects your CPU to see if it's a 400 MHz or 533 MHz; if it detects that your 
chip is a 400 MHz version you'll be limited to a maximum of 132 MHz FSB. 
Since the test processor we used in this review is a 1.6A, we couldn't go 
above 132 MHz FSB in our tests.