Intel Celeron

by Anand Lal Shimpi on August 25, 1998 3:17 PM EST
One would think that due to the lack of L2 cache the Celeron can be overclocked beyond the normal limits of Pentium II processors, unfortunately this assumption mostly false.  The Celeron 266 can be taken just as far as a Pentium II - 266 can.  True, the Celeron can boot at 100 x 4.0, however stability at this speed is another factor.  Using the retail heatsink there is virtually no chance that you will be able to boot into Windows 95 completely at 100 x 4.0, if you happen to be blessed with a Celeron Heatsink/Fan unit (you can't use normal Pentium II Heatsink/Fan combos on a Celeron) achieving this high of a clock speed is made possible, but definitely not practical. 

As mentioned above, a Celeron 266 will run at virtually every speed its Cache-Equipped brother, the Pentium II - 266, will using a 4.0x multiplier.  Running at 300MHz (4.0 x 75MHz) and 333MHz (4.0 x 83MHz) isn't much of a problem, although you may want to buy a Fan for the CPU if you plan on overclocking it, as the retail Heatsink tends to get extremely hot after extended periods of use.

If you plan on overclocking your Celeron, you must take the initiative to check with the motherboard you plan on using with your processor to see if it supports the 75/83MHz bus speeds, otherwise you're pretty much out of luck.

Due to the lack of any L2 cache subsystem, the Celeron benefits greatly from increased bus speeds.  With Socket-7 systems, we have proven that an increase in bus speed increases performance considerably as a result of the faster access to the L2 cache.  In the case of Celeron, where there is no L2 cache to access at any speed, the System RAM picks up the slack, and the faster you can access the System RAM, the more your system benefits overall.  If it were possible, a Celeron running at 75 x 4.0 (300MHz), in comparison to a Celeron running at 66 x 4.5 (300MHz) would produce a performance difference much greater than if you compared a Pentium II 300/75 to a Pentium II 300/66 for that very reason.

The Crunchy Green Exterior Who would want a Celeron?
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  • Remingtonh - Sunday, November 21, 2010 - link

    I'm thinking since the celeron will be such a massive upgrade from my 486DX/2-66, at an attractive price, I'll go for it.

    I saw a nice HP Tower at frys with the 266 Celeron at a very affordable price. My question is, since it's slot-1, will I likely be able to replace it with a pentium II at a later date once prices go down? Will it be compatible?
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