Let me understand, for BF3:
For low settings we need 8800GT or equivalent.
For medium settings we need ATI RADEON 6950 or equivalent, which is 6 tiers above the 8800GT.
So for high settings we will need a card 6 tiers above the HD 6950 ( I guess HD 7990 CF ).
And Finally for ultra settings we will need a card 6 tiers above the HD 7990 CF.
No, that doesn't sound quite right. Maybe recommended means high settings...