The GeForce 9800 GT is a curious beast - it was soft launched (meaning no big announcements or seeding from NVIDIA) at the end of July without much fan fare. When asked NVIDIA about the product at the time of its release to partners, they were more than willing to admit that the 9800 GT shares pretty much every facet of its technological innards with the GeForce 8800 GT. What NVIDIA has added this time is support for Hybrid Power (included at the card partners discretion...ugh), the ability to completely turn the GPU off when not in use in conjunction with supported NVIDIA chipset motherboards, and a planned move to 55nm process technology. Other than that, you probably already know this product.
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Review: PC Perspective