Layout & Specs
Here's a quick spec comparison between the KK266 and the KK266+ versions...
| Model | Chipset | Expansion Slots | Features |
| KK266 | VIA Apollo KT133A | 1 x AGP (4X), 6 x PCI, 1 x ISA | 4.1 Channel, 3D Hardware Sound |
| KK266 plus | VIA Apollo KT133A | 1 x AGP (4X), 6 x PCI, 1 x ISA | 6 Channel, 3D Hardware Sound, SPDIF option via Super Audio |
KK266+ KK266
Looking at the 2 boards from Iwill, they certainly are similar except for a few minor changes. The first thing you'll notice is that shiny, metallic heatsink where the KT133A northbridge is. The original KK266 didn't have any heatsink attached to it, that's why even at non-overclocked speed it was a bit hot. With the KK266plus, what you get is an expensive looking heatsink. The only downside is that it doesn't come with a fan, just passive cooling. I was told that Iwill initially has active cooling on its chipset but later decided to ship the retail version without it. It is worth noting though that even at highly overclocked settings, the chipset heatsink is still quite cold.
Next change is on the integrated audio. With the KK266plus, you get 6 channel (5.1) sound as compared to the original KK266's 4.1 channel audio. It uses CMI's newest audio chipset, the CMI 8738 HRTF audio controller. It provides 6 speaker channel support, 32 voice HRTF based 3D positional audio, support for Microsoft direct sound 3D and Aureal A3D support for EAX sound effects (environmental audio extensions) and SPDIF support via Iwill's optional Super Audio. Now, that changes onboard sound dramatically.
Physically, there is only one noticeable change in the layout of the board itself. This is the location of the ATX power connector. On the KK266, it is located between the CPU socket and the DIMM slots. Now Iwill relocated it behind the audio IO panel of the KK266plus.
KK266+ KK266
The only reason I can think of for this change is Iwill's respect for the overclocker. By doing this, there is more clearance for those thinking of putting massive heatsinks or waterblocks for cooling. Yes, just keeping it out of the way. Of course they still have that 4 holes around the socket for some of the newer heatsinks. Now that's thinking ahead.
