The GeForce GTS 250 is essentially the same card as GeForce 9800 GTX+, but with an updated BIOS and a new package. Additionally, the old GeForce 8800 GT (GeForce 9800 GT) will live on as the GeForce GTS 240.
The following is what NV says to its partners.
“GeForce GTS 250 carries over the same specs and features of 9800 GTX+, and hence the same GPU, memory, board, PCB, and thermal solution. AIC’s should be confident in purchasing GPU’s, PCB’s, and other materials, since the only change is a new VBIOS to implement the new branding”
In fact, GeForce GTS 250 graphics card is exactly the same as 9800GTX+. What NVIDIA has done is just to update the BIOS and change the packing. Besides, 8800GT (9800GT) will also be renamed as GTS 240, in a quieter way though. It seems NVIDIA is going to focus on promoting its Low Power Series.