Plz help!!! Serius FPS problem...

[trelf]

When i start wow my fps are 60-70 even in the most populated places in towns.After 2-3 mins my fps drop to 5-15 and wont improve.I have changed my Graphics card to a better one and still no improvement to my fps.I formatted my pc 10 times and still no change.I tried different drivers,the latest,the ones i have in the cd came with my Graphics card,and STILL no improvement.I am desperate.Below i write my PC specification.If you got any ideas i would like to see.

Thank you in advance

---PC spec---

-Intel P4 Prescott 3Ghz
-Gigabyte 8IPE1000G (dual channel)
-1024 RAM (2x512)
-WD 120GB 7200rpm
-GeForce 6600GT (128MB) <----- i tried a really better G card and still no improvement
-ADSL 8Mbit conn
-Win xp (no sp2)

P.S: My video details in game are lowered to the minimum.My monitor is set to have up to 100fps in 1024x768 and i play wow in same resolution.
P.S.2: Wow has same performance even if i start it while listening to music,burning a dvd,have 10 windows open,or open just wow itself.Same things in every case when i start 60-70 fps and after 3 mins 5-15.

[Kayru]

I have no idea what it can be since you seem to have tried it all, write to blizzard support.

[Valamir]

You will want to take it to the WoW forums where there are about 1 million others having the same issue. I have tried to get an answer from them too. They refuse to give anyone a straight answer. It was all because of this last patch and Blizzard is denying it even after a 100 page thread of complaints.

[vguy]

I have noticed a very significant difference in FPS if you turn off "Show Player Names" in the interface menu.