wont the game just not load up properly.
Shouldn't be a problem. If it's a requirement of speed, then generally it doesn't matter. If it's a requirement of MMX, SSE, or stuff like that, that matters. If it's a graphics requirement of hardware T&L, that matters. If it's a requirement of xMB of RAM, that matters. But CPU speed requirements typically don't matter. With the wild variations in speed between various Intel and AMD CPUs, CPU speed requirements are more guess than anything, and usually aimed at a P4's speed.