4890 and 4850 crossfire

Will the 4850 bring the speed down of the 4890 and make it like 2 4870's instead?

It will perform as if it were roughly 2 4850's.

However, unlike SLI, crossfire will not downclock the faster card, they will work asynchronously. That doesnt mean much to the average person, effectively the faster card wil just wait around for the slower to finish its job, but it does mean that in a game (such as a windowed dx9 game) that does not support crossfire you will get the performance of a single 4890 (assuming it is your primary card) instead of a 4850+4850. It also alows crossfire to be much more forgiving as far as what can be mixed together,

However, since the 4850 is so much slower than a 4890 your performance will only be marginally better with a 4850+4890 (same performance as a 4850+4850) as compared to a single 4890.

I'm only answering logics but there should be no difference between the two cards working at the same speed or one faster and then waiting.

Maybe I'm not right but it wouldn't make sence would it?

I have never seen any review or data that was able to show any difference between two synchronous slower cards or an asynchronous faster card with a slower partner.

For all practical purposes a faster card crossfired with a slower cards works exactly the same as two of the slower cards, but with the advantages over synchronous methods I mentioned above.

That would be the most cost effective thing to do.

The only reason you would want to mix crossfire is if you got a card on the super cheep, or you play a lot of games that only use the primary card so want it to be faster.

Yeah don't bother getting a 4890, then. Your setup would hardly benefit from it.

They should be fine.

I enjoy the sound quite a bit. I have always enjoyed Creative products, it didn't disappoint me.. looks cool too .

I more or less get a sound card for the extra features though.. not so much the "sound quality."