Help X800 pro strange behaviorFollow

I just bought this card replacing my 5900U.

There is no locked up so far, and the speed difference is hardly noticeable. It still jerks heavily in mog house with 10 flowers blooming.

However I found very strange behavior of this card to 'show' the scenes in FFXI compared to 5900U. With X800, the far objects appear very late and can notice new objects keep poping out and out when move nearer. At this moment i saw front of my way is clear, the next moment a small hill pop out suddently in front, and then it 'keeps spreading' and becomes a mountain & unpassable !!! What the h is going on ? And when i am real near to the scene other details starts to pop up, i.e. tree branching, small attached rocks.... in other words, what u see on screen just keep changing and new things poping out.

With 5900U everything shown properly. Tried all Ati setting no go. Catayst 4.6

Any clue? don tell me ATi sucks > <; If so, plz reply fast so that i can send it back to the shop for 6800 ^^.

P4-3.2C > 875P > 1G > X800pro Sapphire

go to www.tomshardware.com
check out on the thread about Ati cheating with its X800 card on bechmark tests. Perhaps it has something to do with its Brillinear functions.

Anyway, whats the benchmark results for this baby? could you post it in the general forums please?