Autor: molsar (xzxzx_at_asasa.com)
Data: Wed 17 Sep 2003 - 16:33:23 MET DST
> AGP Master 1W/S Write
This BIOS feature allows you to reduce the time the AGP bus-mastering device
has to wait before it can initiate a write command, to only one wait state.
This speeds up all writes that the AGP bus-master makes to the system
memory.
So, for better AGP read performance, enable this feature. Disable it only if
you notice visual anomalies or if your system hangs on running software that
make use of AGP texturing.
Curiously, some motherboards apparently come with a default AGP master write
latency of 0! Enabling the AGP Master 1WS Write in such cases will actually
increase the latency by one wait state and reduce AGP write performance.
Although it's quite unlikely that the default AGP master write latency would
be zero, that's what their manuals say.
> AGP Master 1W/S Read
Common Options : Enabled, Disabled
This BIOS feature allows you to reduce the time the AGP bus-mastering device
has to wait before it can initiate a read command, to only one wait state.
This speeds up all reads that the AGP bus-master makes from the system
memory.
So, for better AGP read performance, enable this feature. Disable it only if
you notice visual anomalies or if your system hangs on running software that
make use of AGP texturing.
Curiously, some motherboards apparently come with a default AGP master read
latency of 0! Enabling the AGP Master 1WS Read in such cases will actually
increase the latency by one wait state and reduce AGP read performance.
Although it's quite unlikely that the default AGP master read latency would
be zero, that's what their manuals say.
> AGP Read Synchronization
? hmm
> i ile ustawić w Aperture size (czy jakoś tak)
> jeżeli mam tylko 256 mb ramu (maksymalnie
> w tym polu mogę ustawić 128mb, ale czy to nie
> za dużo
This BIOS feature does two things. It selects the size of the AGP aperture
and it determines the size of the GART (Graphics Address Relocation Table).
The aperture is a portion of the PCI memory address range that is dedicated
for use as AGP memory address space while the GART is a translation table
that translates AGP memory addresses into actual memory addresses which are
often fragmented. The GART allows the graphics card to see the memory region
available to it as a contiguous piece of memory range.
Host cycles that hit the aperture range are forwarded to the AGP bus without
need for translation. The aperture size also determines the maximum amount
of system memory that can be allocated to the AGP graphics card for texture
storage.
Please note that the AGP aperture is merely address space, not actual
physical memory in use. Although it is very common to hear people
recommending that the AGP aperture size should be half the size of system
memory, that is wrong!
The requirement for AGP memory space shrinks as the graphics card's local
memory increases in size. This is because the graphics card will have more
local memory to dedicate to texture storage. So, if you upgrade to a
graphics card with more memory, you shouldn't be "deceived" into thinking
that you will need even more AGP memory! On the contrary, a smaller AGP
memory space will be required.
It is recommended that you keep the AGP aperture around 64MB to 128MB in
size, even if your graphics card has a lot of onboard memory. This allows
flexibility in the event that you actually need extra memory for texture
storage. It will also keep the GART (Graphics Address Relocation Table)
within a reasonable size.
> P.S. przydałaby mi się pomoc w zrozumieniu SDRAM 1T command,
> fast command, fast R-2-R, PCI delay transaction, display activity,
> cpu halt command detection, PCI Ide busmaster, PCI Latency Timer,
Chassis Instrusion ...dete. - wykrycie otwartej obudowy
CPU Fan Detection - wykrywa czy FAN na CPU jeszcze zyje :P tzn jak masz
chlodzenie woda to trza wylaczyc zeby ci nie monitowal.
To archiwum zostało wygenerowane przez hypermail 2.1.7 : Wed 19 May 2004 - 11:13:22 MET DST