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PIII Overclocking Problems, Solutions, & Results

by johnd - Feb. 10, 2000

with contributions by:
James Anderson, Clayton Brazil, Mark Hammond, Eduardo Chaves Rosas, Dylan Thomas, and Paul aka "Topshelf"

Solution #2

Clayton Brazil shared this suggestion about RAM speeds and its effect on the AGP bus. He has a Voodoo3 2000 that he has run with two Celeron 300A systems. One system uses an AOpen AX6B and the other uses an AOpen AX6BC. The Voodoo3 2000 would not run on either system with the 2/3 AGP divider and a FSB speed of 117Mhz. After replacing his PC100 RAM with PC133 RAM, the Voodoo3 2000 would run at both 112 Mhz using the 1/1 divider and 117Mhz using the 2/3 divider. So, with his systems, getting faster PC133 RAM helped him gain a few more Mhz on the FSB.

Results #1

Eduardo Rosas passed along his results from overclocking his 500E. His system consisted of an Abit BE6-II, Samsung 8.4GB hard drive, 128MB generic PC133 RAM, Daytona 8Mb video card, and a generic slot 1 adaptor. Eduardo used the stock heatsink and fan and the default core voltage. He was able to get up to 700Mhz with his 500E running at 35 degrees C. His stability was solid and he able to run Unreal and 3DMark 2000. The CPU would also run at 750Mhz, but was not fully stable at that speed. While operating at 750Mhz he has experienced problems with Photo Shop.

Solution #3

Dylan Thomas passed along his results and a solution that worked for him. His system consisted of a PIII 550E, an AOpen X63 pro with the rev 52 latest BIOS for coppermine support, a Quantum KX 15GB UATA66 hard drive, Panasonic 10X DVD, Creative Labs GeForce DDR with the memory overclocked to 330Mhz and the core at 130Mhz.

His system originally had a PIII 500 (Katmai) runing at 600Mhz with a FSB speed of 120Mhz for weeks without a single lockup. After noticing a local reseller with some returned PIII 550Es, he bought one along with an Iwill Slocket II and "went for it."

His new system would boot at 733Mhz, but would lockup or give corrupt data file messages when he tried to run 3DMark 2000. Scan registry would also occasionally detect problems on Windows bootup. Even at 115Mhz on the FSB 3DMark 2000 would not run. However, running actual games would not produce any problems.

After trying to diagnose the problem for hours, he finally noticed that at the start of the benchmark it would freeze on the transfer from the hard drive to RAM. After using a utility from Quantum's web site, he was able to set his hard drive to act as a UDMA33 drive and not a UDMA66 drive. This allowed him to run rock solid at 852Mhz. To make sure the hard drive change was the fix, he renabled the UDMA66 and the system locked again. {Note: If Dylan is able to get a picture of his CPU, heatsink, and fan combo, we'll be present a small article on how to cool your PIII 550E overclocked to 852Mhz to 23 degrees C.}

Results #2

Mark Hammond passed along his PIII 550E overclocking results. His CPU is running on an Abit BX6 rev2 motherboard with a Voodoo3 2000 AGP overclocked to 175Mhz, 8ns PC100 RAM, and using a 2/3 AGP divider. The core voltage is running at the default 1.6v. He managed to get the system to 733Mhz with a 133Mhz speed on the FSB even with the PC100 RAM. According to Mark, it's "Crusing just dandy." That was until he was online with Quake III Arena for a while. He then started seeing some dumps to the console. Backing the speed back down to 710Mhz has now given him error free 3D gaming.

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