OVERCLOCKING: The Iwill KK266Plus is an excellent overclocker's motherboard.  With VCore adjustments ranging from 1.125v-1.85v (in .025v steps), CPU multiplier adjustments and with Front Side Bus frequency adjustments in 1MHz. increments (up to 166MHz), squeezing a few more MHz. out of your CPU should be easy.  We used our trusty 1GHz. AXIA T-Bird throughout testing.  This particular CPU has had no trouble hitting 1450MHz. on most motherboards.  On the Iwill KK266Plus however, we were able to step it up a bit higher...all the way up to 1470MHz. (10x147).  On only a select few motherboards were able to hit a speed that high with this particular CPU. The Hot Hardware Test Systems Budget Speedsters... 1GHz AXIA T-Bird @ 1000MHz. & 1470MHz. Iwill KK266Plus KT133A Motherboard 128MB Mushkin Rev. 3 PC133 SDRAM (2-2-2) GeForce 2 Ultra (12.41 Drivers) Sound Blaster Live! Netgear FA310 NIC IBM 7200RPM 30GB HD Creative Labs 52X CD-Rom Standard Floppy Drive Windows Millennium Edition DirectX 8.0a Via 4-in-1s v.4.32 1GHz AXIA T-Bird @ 1000MHz. Shuttle AK11 KT133A Motherboard 128MB Mushkin Rev. 3 PC133 SDRAM (2-2-2) GeForce 2 Ultra (12.41 Drivers) Sound Blaster Live! Netgear FA310 NIC IBM 7200RPM 30GB HD Creative Labs 52X CD-Rom Standard Floppy Drive Windows Millennium Edition DirectX 8.0a Via 4-in-1s v.4.32 Performance Time for some numbers...

First out of the gate is SiSoft Sandra.  We ran Sandra's CPU, Multimedia and all important Memory benchmark tests with the KK266Plus...

SiSoft Sandra:

At both the default and overclocked speeds, CPU performance was on par with other boards we have tested.  While overclocked our Iwill KK266Plus / T-Bird combo managed to best all of Sandra's reference systems.

In the Multimedia tests, we see more of the same.  Again, besting all reference systems while overclocked.

In Sandra's memory test, we saw some decent numbers, but this is where the KT133A chipset powering the KK266Plus shows it's age.  Although for an SDRAM equipped board these scores are good...among the best we've seen with the KT133A...spending only a few dollars more on a DDR capable motherboard and RAM would yield considerably higher performance.

Time to move on to some gaming scores...

QUAKE 3 ARENA:

We ran Quake 3's built-in Timedemo, Demo001, at low resolution to isolate CPU performance.  From this point forward we'll be comparing the Iwill KK266Plus' performance against a similar board we reviewed a while back, the Shuttle AK11...

Although the difference is not great, the Iwill KK266Plus was able to surpass the Shuttle AK11 by a few frames per second.