This begins with "CECH", followed by a letter indicating what model the system is. On all models of the PS3, the last seven characters of the serial number make up the console's model number. It utilizes a 45 nm Cell which results in a 34% reduction in power consumption over the previous 65 nm Cell model the last Slim model further decreases power consumption with the move to a 40 nm RSX and later 28 nm on the CECH-43xx models. Major improvements were introduced with the PS3 Slim. The RSX GPU also saw reduction in size over periodic revisions of the PS3. Since launch, the Cell processor shrank from 90 nm to 45 nm. This in turn resulted in production savings, lower heat production, lower cooling requirements and quieter operation. The PS3 received several component revisions which served to reduce power consumption.
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