The Intel Core 2 Duo T9550 was the middle class dual core CPU for laptops at the time of introduction. It is similar to the Core 2 Duo P9600 except for the higher TDP of 35 versus 25 Watt.
Due to the relatively high clock speed and 6MB Level 2 cache, the T9550 offers enough performance for demanding games (in 2009) and applications.
The T9550 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).
The Intel Core 2 Duo P8400 is a dual core processor for laptops. It features 2.26 GHz and a shared level 2 cache of 3 MB. Due to the smaller cache (Core 2 Duo T-Models got usually 6 MB at this clock rate), the TDP is only 25 Watt (instead of the 35 Watt of the T-models).
The performance of the P8400 is on par with the fast Turion II Ultra with about 2.4 to 2.6 GHz. Modern demanding games like Supreme Commander may be limited by the CPU performance. High end gamers should choose a higher clocked Core 2 Duo (or Core i5 / i7).
The P8400 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 as low as 800 MHz to save power (in idle mode).
The Core 2 Duo P8400 can be used in a Socket P socket with 479 pins: Socket P / Micro Flip-Chip Pin Grid Array (Micro-FCPGA) requires 479-pin surface mount Zero Insertion Force (ZIF) socket (mPGA479M socket) or Micro Flip-Chip Ball Grid Array (Micro-FCBGA) for surface mount (479-ball)
Average Benchmarks Intel Core 2 Duo T9550 → 100%n=12
Average Benchmarks Intel Core 2 Duo P8400 → 91%n=12
- Range of benchmark values for this graphics card - Average benchmark values for this graphics card * Smaller numbers mean a higher performance 1 This benchmark is not used for the average calculation
log 18. 19:09:24
#0 checking url part for id 449 +0s ... 0s
#1 checking url part for id 398 +0s ... 0s
#2 not redirecting to Ajax server +0s ... 0s
#3 did not recreate cache, as it is less than 5 days old! Created at Wed, 15 Sep 2021 13:09:12 +0200 +0s ... 0s
#4 composed specs +0.012s ... 0.013s
#5 did output specs +0s ... 0.013s
#6 getting avg benchmarks for device 449 +0s ... 0.013s
#7 got single benchmarks 449 +0.018s ... 0.031s
#8 getting avg benchmarks for device 398 +0s ... 0.032s
#9 got single benchmarks 398 +0.045s ... 0.076s
#10 got avg benchmarks for devices +0s ... 0.076s
#11 min, max, avg, median took s +0.011s ... 0.087s