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The speed of this model is marked as 75MHz Bus 3.5x—75x3.5 is 262.5MHz, which is 21 the correct speed for a Cyrix M-II 333. Unfortunately, checking for overclocking entails removing the CPU fan, which is a nuisance. Disreputable firms often remove the original z O

markings and replace them, which can make it very difficult to spot an overclocked SS z?

CPU. Even if the CPU's markings haven't been intentionally altered, they might be worn elO

away by friction when installing the heat sink, as has happened to some extent to the SXG

CPU shown in Figure 21.1. -1

Figure 21.1

CPUs generally bear speed markings.

Figure 21.1

CPUs generally bear speed markings.

Unfortunately, computer quality is something of a hit-or-miss proposition, particularly for mail-order computers. You might not know that you've bought a "lemon" until you've had the computer for a month or more.

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