Got these from
http://en.wikipedia.org/wiki/AMD_Turion
Caspian (45 nm SOI)
* Dual Stars core
o L2 cache: 512 KiB per core, fullspeed (For Turion II, Athlon II and Sempron II), or
o L2 cache: 1 MiB per core, fullspeed (For Turion II Ultra)
* Memory controller: dual channel DDR2-800 MHz
* MMX, Extended 3DNow!, SSE, SSE2, SSE3, SSE4a, AMD64, PowerNow!, NX bit, AMD-V
* Socket S1G3
* HyperTransport (1800 MHz, 3600 MT/s on M6xx/M5xx models, 1600 MHz, 3200 MT/s for M3xx models)
* Power consumption (TDP): 35 watt max
o Clock rate: 2000 (M1xx, L2 cache 512 KiB)
o Clock rate: 2000, 2100, 2200 MHz (M3xx, L2 cache: 1 MiB)
o Clock rate: 2200, 2300, 2400 MHz (M5xx, L2 cache: 1 MiB)
o Clock rate: 2400, 2500, 2600, 2700 MHz (M6xx, L2 cache: 2 MiB)
o 25W TDP:
+ M100: 2000 MHz - Sempron II Single-Core (only 64 bit FPU)
+ M120: 2100 MHz - Sempron II Single-Core (only 64 bit FPU)
o 35W TDP:
+ M300: 2000 MHz – Athlon II Dual-Core (only 64 bit FPU)
+ M320: 2100 MHz – Athlon II Dual-Core (only 64 bit FPU)
+ M340: 2200 MHz – Athlon II Dual-Core (only 64 bit FPU)
+ M500: 2200 MHz – Turion II Dual-Core
+ M520: 2300 MHz – Turion II Dual-Core
+ M540: 2400 MHz – Turion II Dual-Core
+ M600: 2400 MHz – Turion II Ultra Dual-Core
+ M620: 2500 MHz – Turion II Ultra Dual-Core
+ M640: 2600 MHz – Turion II Ultra Dual-Core
+ M660: 2700 MHz – Turion II Ultra Dual-Core
Look at it carefully, it's written (SSE4a), can u explain ?