"InetMatrix" <ken_h@mail.tele.dk> skrev i en meddelelse
news:3e47a0be$0$11008$edfadb0f@dread12.news.tele.dk
> Er der nogen der kan fortælle hvad fastwrites er ???
Fast Writes, a Unique Feature of GeForce
One of the special features of NVIDIA's GeForce256 graphics accelerator
is its unique support for 'Fast Writes'. The idea behind this
implementation is the improvement of data transfers that go directly
from the CPU to the graphics chip, which obviously does not touch such
things as e.g. 'AGP-texturing'. 3D-software with very complex 3D-objects
requires that the CPU transfers a huge amount of triangle-data to the
graphics chip and here the 'Fast Writes' avoid the stalling detour from
the CPU to memory and then from memory to the 3D-chip. 'Fast Writes'
idea is to directly connect CPU and 3D-chip. So far about the theory,
please look at NVIDIA's white paper for more detail. Currently 'Fast
Writes' are only made available to platforms using either Intel's 820 or
840 chipset. Other AGP4x-chipsets like VIA's Apollo Pro 133
Slot1-chipset and VIA's Apollo KX133 SlotA- chipset are currently not
supported by GeForce's drivers. Further down in this article you will
find out why this is an actual blessing right now, since the driver
seems to have some problems with Fast Writes, leading to a rather
significant drop in performance in i820 and i840-systems.
http://www6.tomshardware.com/mainboard/20000214/agp-02.html#fast_writes_a_unique_feature_of_geforce
Enable/disable fast writes:
http://www.evga.com/support/engnotes/Note_02.asp
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