test system specs:
computer hardware:
processor:	amd athlon xp 1800+
clock speed:	1.533ghz
motherboard:	acorp 7kt266a
chipset:	via kt266a
videocard:	MSI G3Ti500 Pro-VTG (GeForce3 Ti500 240/500)
Network Card:	-
Memory:	256 MB Micron DDR333
Hard Drive:	IBM 30.7 GB DeskStar 75 GXP
CDROM:	Samsung 40X
Floppy:	Mitsumi 1.44MB
Heatsink:	Thermaltake Dragon Orb 3
PowerSupply:	Enermax 550 Watt
Software Setup:	Windows 2000 + SP2 VIA 4in1 4.37 DetonatorXP 22.80 DirectX 8.0
Benchmarks:	Business Winstone 2001 Content Creation 2001 WinBench99 SiSoft Sandra 2002 Pro 3DMark2001 Serious Sam 1.05 Return to Castle Wolfenstein

Just a reminder, the benchmark settings were run as followed; 11.5x133 = 1533 MHz and 11.5x143 = 1644 MHz. Please keep that in mind when viewing the benchmarks.

Business Winstone 2001	Source: ZDNet

Business Winstone is a system-level, application-based benchmark that measures a PC's overall performance when running today's Windows-based 32-bit applications on Windows 98 SE, Windows NT 4.0 (SP6 or later), Windows 2000, Windows Me, or Windows XP which runs real applications through a series of scripted activities and uses the time a PC takes to complete those activities to produce its performance scores.

Business Winstone 2001
	FSB	Winstone Units	Ranking
1.	133 MHz	60
2.	143 MHz	64.4

Since this is more of a office based benchmark, it'll be almost impossible for a person to notice the slight differences in the systems. Still, overclocking a little does improve performance, you guessed it, a little.

Content Creation 2001	Source: ZDNet

Content Creation Winstone 2001 keeps multiple applications open at once and switches among those applications. Content Creation Winstone 2001's activities focus on what we call "hot spots," periods of activity that make your PC really work--the times where you're likely to see an hourglass or a progress bar.

Content Creation 2001
	FSB	Winstone Units	Ranking
1.	133 MHz	80.4
2.	166 MHz	83.1

Again, Content Creation is a office productivity benchmark. In real world situations, the computer would all be user limited.

WinBench99	Source: ZDNet

WinBench 99 is a subsystem-level benchmark that measures the performance of a PC's graphics, disk, and video subsystems in a Windows environment. WinBench 99's tests can run on Windows 95, Windows 98, Windows NT, Windows 2000, and Windows Me systems.

WinBench 99 v1.2 Benchmark Results
	FSB/Benchmark	Score	Ranking
1.	133/Business Disk	8310
2.	143/Business Disk	7820
3.	133/High-End Disk	23400
4.	143/High-End Disk	22900
5.	133/Business Graphics	797
6.	143/Business Graphics	868
7.	133/High-End Graphics	1610
8.	143/High-End Graphics	1760

It's odd that the overclocked system would loose to the stock one in the disk benchmarks. It's possible that the timings are off because of the mild overclock which is affecting performance.

Sisoft Sandra 2002	Source: SiSoftware

SiSoft Sandra 2002 is designed to test the theoretical power of a complete system and individual components. The numbers taken though are again, purely theoretical and may not represent real world performance.

SiSoft Sandra 2001 Benchmark Results
	Multimedia Benchmark	Score
1.	133/Integer SSE	8400 it/s
2.	143/Integer SSE	9026 it/s
3.	133/Floating-Point SSE	9763 it/s
4.	143/Floating-Point SSE	10490 it/s
	CPU Benchmark
1.	133/Dhrystone ALU	4234 MIPS
2.	143/Dhrystone ALU	4542 MIPS
3.	133/Whetstone FPU	2116 MFLOPS
4.	143/Whetstone FPU	2275 MFLOPS
	Memory Benchmark
1.	133/Integer ALU	2043 MB/s
2.	143/Integer ALU	2196 MB/s
3.	133/Float FPU	1912 MB/s
4.	143/Float FPU	2056 MB/s

The overclocked system wins every test here because not only is the FSB higher, there is more CPU power backing it up too. Still, the numbers are very respectable, performance is on par with other KT266A based boards that we have looked at.