I'm running in to a new concern when shopping for upgrades: bottlenecks.
Currently I have an i5 750 clocked to 3.4GHz
8GB of g.skill ripjaws (those shouldn't be a problem
and 2 5750s in crossfire
now I know my VGAs are my weak point, but my new concern is how high can I go with a crossfire setup (or single card for that matter) before my CPU starts to hold me back?
anyone have any thoughts?
If you consider anything less than the performance of the fastest CPU to be the definition of a bottleneck, then yes there'll be a bottleneck.
I wouldn't worry about a CPU bottleneck... and if you're really worried I'm sure there is some room for growth in your current OC, I would just concern myself with what is the best dual GPU config for the price.
From my point of view that would be a pair of the HD6870. http://www.anandtech.com/bench/Product/301?vs=299
http://www.newegg.com/Product/Productcompare.aspx?Submit=Property&N=100007709&IsNodeId=1&PropertyCodeValue=http://forums.bethsoft.com/index.php?/topic/1216347-unofficial-will-my-pc-run-skyrim-thread-7/679%3A79235%2C679%3A79234%2C679%3A90543&bop=And&CompareItemList=48|14-131-374^14-131-374-TS%2C14-102-948^14-102-948-TS%2C14-102-945^14-102-945-TS
Lots of interesting reading on CPUs & Bottlenecks:
http://www.tomshardware.com/reviews/processor-architecture-benchmark,2974-9.html
http://alienbabeltech.com/main/intel-e6850-bottleneck-investigation/all/1
http://alienbabeltech.com/main/core-i7-vs-penryn-vs-phenom-ii-with-hd-4870-x2-trifire?all=1