Intel Core 2 Duo SP9400 vs Intel Core 2 Duo T9400 vs Intel Core 2 Duo T8300
Intel Core 2 Duo SP9400
► remove from comparisonThe Intel Core 2 Duo SP9400 is a laptop CPU with the full 6MB level 2 cache at 2.4 GHz and a TDP of only 25 Watt.
Intel Core 2 Duo T9400
► remove from comparison
The Intel Core 2 Duo T9400 was a uppder middle class dual core CPU for laptops, at the time of introduction. It is similar to the Core 2 Duo P9500 except for the higher TDP of 35 versus 25 Watt).
Due to the relatively high clock speed and 6MB Level 2 cache, the T9400 offers enough performance for most demanding games (in 2009) and applications.
The T9400 uses a Penryn (Montevina Update) core that features 2 integer units, 1 floating point unit, 1 load unit, and 1 store unit in a 14-stages long pipeline. Due to the Wide Dynamic Execution Technology, the core is able to simultaneously execute up to four instructions.
The integrated Enhanced Speedstep is able to downclock the core dynamically to save power (in idle mode).
Intel Core 2 Duo T8300
► remove from comparisonThe Intel Core 2 Duo T8300 was at the time of announcement a fast dual-core CPU for laptops with 3 MB level 2 cache. It is based on the Penryn core with all features enabled (but without the full 6MB level 2 cache). The later announced Core 2 Duo P7450 was cheaper and used less power.
Benchmarks
Average Benchmarks Intel Core 2 Duo SP9400 → 100% n=9
Average Benchmarks Intel Core 2 Duo T9400 → 115% n=9
Average Benchmarks Intel Core 2 Duo T8300 → 105% n=9

* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation