Generation: 3rd Gen (Ivy Bridge Architecture)
Cores/Threads: 4 Cores & 8 Threads (Handle multiple tasks simultaneously)
Base Frequency: 3.40 GHz (May vary slightly by model)
Max Turbo Frequency: Up to 3.90 GHz
Cache: 8MB SmartCache
Socket Type: LGA 1155 (Supports H61, B75, Z77 motherboards)
Graphics: Built-in Intel HD Graphics 4000
RAM Support: DDR3 1333/1600 MHz
Absolutely fresh and running condition.
No heating issues whatsoever.
You can test it for as long as you wish.