One of the G80 chipset video cards from nVidia. Paired with memory, a heatsink, a fan and 768MB of GDDR3 Memory it becomes the 8800GTX. It is the most recent nVidia video card at the moment.
Its stock speeds are:
575MHz Core Clock
1800MHz Memory Clock
Its twin is the 8800GTS, a cheaper and slightly less powerful G80-series card.
The 8800GTX, a fine video card from nVidia, maintains good framerates in Oblivion while having detail at its maximum.