Yes. But you’ll be able to use it as PC3200 in a future system, if you want.
If you plan on upgrading in the future to a system that supports 3200, then I suggest upgrading to the faster memory.
Yes.
That’s a tough call. HL2 makes heavy use of both CPU and graphics card, though the game doesn’t get really CPU bound until you have a pretty high end graphics card.
Most likely. At least, with systems I’ve built tend to run at the slowest memory speed detected, assuming the usual “Auto” or “SPD” settings are enabled.
Actually, I’m pretty sure the XP 2200+ has a 133MHz FSB, so that’s the speed your RAM would run at (PC2100), regardless of what kind you bought. [Unless the AK35GT2/R supports async memory bus - not familiar with that model - but even if it does, it doesn’t matter much.]
That said, yes, PC3200 RAM is a more sensible long-term investment, since you can use it with a 200MHz FSB CPU somewhere down the line. [Unless you expect to be switching to a DDR-2 system sometime soon…]
