It's NVIDIA 8400GS 512MB DDR2 (by ASUS).
And RAM actually IS 4GB (on a single module, I intend to upgrade to 16GB later), it's less that 4GiB.
I compiled WINE in cca. 10 minutes using all 4 cores @3GHz (is clocks down to 800MHz when idle).
Code:
natirips@nati-desk:/sys/devices/system/cpu/cpu0/cpufreq$ cat scaling_available_frequencies
3000000 2300000 1800000 800000
Also, I noticed that it (unlike my old CPU) clocks each core separately.