Overclocked Radeon HD 4850 vs. Geforce 9800 GTX+
Since Nvidia released the 9800 GTX+, an overclocked GTX 9800, it is AMD's turn to counterattack now.
According to tgdaily.com, the clock speed of the chip will be set 50 MHz about the default value and the memory bandwidth is said to be increased by 5 to 6 GB/s, which might be achieved with a moderately increased memory clock speed.
Additionally the cooling is said to be adjusted for the overclocking - a dual slot solution seems appropriate to deal with the produced heat.
Grafikkarten-Rangliste 2016: 32 Radeon- und Geforce-GPUs im Benchmarkvergleich [Oktober]