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Review: NVIDIA GeForce™ 6800 GT
PCI Express
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Overclocking
With the 6800 GT’s 350 MHz chip
speed and 500 MHz GDDR3 memory, it trails the flagship Ultra
settings by some 10%; which, considering the suggested retail
pricing for both models makes the GT an attractive product
in its price-performance ratio. Yet to see how a 6800 Ultra
would fare, the CoolBits registry value was added to enable
the clock frequencies option in the driver panel. SimHQ, however,
cannot stress strongly enough that the overclocking results
of one review board cannot possibly begin to serve as an adequate
sampling of all similar products, and to please keep this
in mind while reading the following section.
The reference GT overclocked to Ultra
speeds (400/550 MHz) without issues, and because it scaled
so well with resolution increases we decided to again use
the IL-2: Sturmovik Forgotten Battles - Aces Expansion Pack.
The overclocked results are almost
but not quite consistently 10% faster than the default scores,
closely matching the core and memory speed increases. It is
worth noting that with the reference cooling solution the
6800 GT ran reliably overclocked at Ultra speeds during hours
of gaming, though this is again certainly no guarantee that
all GT cards will do so. Also note that the PCIe 6800 Ultra
cores are clocked at 435 MHz compared to the AGP version’s
400 MHz.
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