The NDA ended yesterday for the RAdeon HD 4890, and several dedicated websites have flooded the net with numerous tests, all aiming to demonstrate if the Radeon HD 4890 is the expected killer graphic card.
As a reminder, it features a higher clocked GPU (100 MHz) and memory (75 MHz) when compared to the Radeon HD 4870. Performance are globally in line the clock frequency difference or gain, however the card seems to be rather noisy. this might be the cost to pay for a card with a high potential to be overclocked (most card tested have reached 1 GHz for the GPU).
we are currently working on a procedure to flash such card to make it working in a Mac by using the ROM EFI from the Mac Radeon HD 4870. It was so far unsuccessful, we are still working on it.
It seems that the retailed version of the Radeon HD 4870 is still blocked to 4-5 weeks shipping delay on the Apple Store... problem with stocks or production?
