Ati Radeon HD 4770: AMD's competition for the Geforce 9800 GT
As it has been the case before the launch of the HD 4890, AMD seems to have problems to convince the partners to respect the NDA. Only the official release is missing.
In the Internet presentations about AMD's forthcoming Ati Radeon HD 4770 were revealed and deliver some details about the graphics card. The HD 4770 is based on the RV740, which is apparently produced in a 40 nanometer process. Thus AMD would have the first graphics card with this architecture ready for the market. The HD 4770 is intended for the price section around 100 US dollars.
The used RV740 is said to have 826 million transistors, 640 Stream Processors and 32 texture units. The core is clocked to 750 MHz and will have access to 512 MiByte GDDR5 memory that is linked via an 128 Bit bus interface and runs at a frequency of 800 MHz. Due to the 40 nanometer structure the card is supposed to have a TDP of 80 watt.
It seems like AMD is aiming the HD 4770 directly at the Geforce 9800 GT which is used for comparison. Accordingly the Nvidia card isn't getting away very well in the presentation and the Radeon is winning the benchmarks. But such marketing presentations should always be taken with a pinch of salt.
Grafikkarten-Rangliste 2016: 32 Radeon- und Geforce-GPUs im Benchmarkvergleich [Oktober]