Here is the comparison between video chip RV620 (first), with video chip RV610 (second) :
RV610 chip area is about 78.75 kmm. The transition to 55 nm processes allowed AMD to limit the RV620 video chip area to 66.5 k.mm. Thus, the core area is 15% less. This offers some savings in the production, if the release level will be worthy.
RV620 chip is compatible with all PCB class Radeon HD 2400 released in August this year. Thus, the migration from RV610 to RV620 will be simple and quick. RV620 Video chip announcement is scheduled for the first quarter 2008. It is known that RV620 supports PCI Express 2.0, DirectX 10.1, UVD (H.264 and VC-1), HDMI and DisplayPort. Memory bus will be 64-bit, like predecessor. In CrossFire mode, two such video cards will be able to work without special bridge.
Here is now the photos of chips G86 (first) and G98 (second) :
G86 chip Area is equals to 126.5 k.mm, in case of 65 nm chip G98, it is equal to 85.5 k.mm. Thus, the core area is 32% less, significant progress. However, in absolute terms, the RV620 core is more compact. It is important to remember that G86 served as base for the GeForce 8500 GT video cards, which have 128-bit system bus, and G98 chip immediately received the 64 system bus . This is one reason why the new core is much more compact.
G98 support PureVideo HD decoding with hardware acceleration VC-1, as well as PCI Express 2.0 interface. The G98 will be the base for video card GeForce 8400 GS . The performance level should remain the same. In 3DMark'06 with CPU Celeron 460 (2.4 GHz) and the operating system Windows Vista Ultimate , the graphics card based on G98 chip collect 1236 point. The default frequency of GeForce 8400 GS new version is equal to 567/1400/1000 MHz. Related Products :
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