RV790 Built on Improved 55 nm Manufacturing Process
By Koushik Saha on 22.2.09
Filed Under: AMD, ati, ati raedon, computer, gadgets, gpu, graphics card, hardware

One of the reasons behind why AMD is starting its 40 nm GPU lineup with a mainstream GPU such as RV740, is that the 40 nm process needs further development by foundry companies. It hasn't developed to the level that safely permits manufacturing high-end GPUs with stellar transistor-counts. For the same reason, NVIDIA's 40 nm conquest will be flagged off by the entry-level GT218 GPU. High-density circuits builton the current 40 nm process are known to be very prone to electrical leakage.
RV790 engineering-samples undergoing testing are known to be coming in two flavours according to the source: a base model and an overclocked model. The base model comes with the same exact clock speeds as the RV770XT: 750/900 MHz (core/memory), while the overclocked model is known to come with clock speeds of 850/975 MHz (core/memory). To achieve that 100 MHz increment in core frequency, the voltage is known to be stepped-up from 1.24 to 1.30 V. Products based on this GPU are known to surface by April.
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