Yes, the motherboard & RAM are important pices of ino for overclocking.
Cooling (heatsink) type and power supply brand info also helps as they will influence your overclock quiet a bit.
Finally, info about Voltage increase and temperatures (case and CPU) help in gettinc a more complete picture of what's going on and how much more room you may have.
so:
1. You can't expect to overclock much at default 2000+ voltage.
2. When you increase voltage, retail 2000+ heatsink usually cannot keep up with the resulting heat so for 2000+s, non-retail heatsinks are required for major overclocks...