4000 MHz Effective 5670
Memory Clock: 1800MHz (Effective) 6670
I haven't researched into it but off the top of my head I would look at FRP's and people's experiences!
I've seen top end older cards beat lower end newer cards!
If it was a decent card no way it be on special offer plus they would have flown out of the cart?
I only know what people have used and O/ced well as for £10 extra who cares?
The only other consideration is that newer cards rely on newer and more cores to do some of the work?
I don't know his system specs he currently uses, but if he runs a P4 and runs a 6670 his temps could cause throttling?
The flip side is a top performing 6670 is well expensive?
Embarrassingly I am still on a P4 with HT, can't remember whether the bios allows any control over the throttling on my MB. It has been a very long time since I was into pc's hardcore style. Believe I am on PCI-E 1.0 as well which I heard later spec ATI cards have a problem with... not sure how true this is.
I am running an uprated HS on the CPU, but this stuff is now getting ancient, but I don't see a point upgrading as I use a console for gaming and the pc meets my needs easily for what it is used for, however I have been eyeing up some of these new desktop build with the 22" touchscreen monitor and everything built into the monitor.
My current tower is a bit cramped as well

Went from a big thermaltake to a Media center sized case unit when I first moved and was used as a MC as I had a laptop, then when I moved again it became a desktop PC in the same tinchy case
