Please- some advice on P3V4X settings-I've searched everywhere!

Scanick

Member
Apr 21, 2000
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I am having all sorts of crazy crashes while trying to run games and also during shutdown. I've got the p3v4x with a P3667 (not OCed) 384 pc133, geForce2 32mb. The settings I ca't find info on are:
Video Cache Mode (UC or USWC)
Fast Write (Disabled or Enabled)
AGP (4,2,1X)
Delayed Transaction (D or Enabled)
PCI to DRAM (D or E)
EC DMA Select (3?)
Byte Merge (D or E)
Shadow Setting (various) are currently disabled

Text
Thanks for the help! Scot
 

Scanick

Member
Apr 21, 2000
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Shagga- Thanks so much for your help on both my posts- I really appreciate it- Scot
 

Shagga

Diamond Member
Nov 9, 1999
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Glad I could help. It's a good place to come if you need assistance/advice. The members have helped myself many a time.

;)
 

Scanick

Member
Apr 21, 2000
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:confused: Still can't find info on Byte Merge, and Video Cache Mode (UC or USWC) anyone know about these two settings? ECP DMA Select (default at 3) I think should be taken down to 1- The language around several of these setting descriptions seems to be different for each motherboard manufacturer. I guess it will just take a lot more research to figure it all out. Thanks again everyone,
Scot
 

Shagga

Diamond Member
Nov 9, 1999
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Do a search on this forum for USWC. Someone explained it in quite some detail if I remember correctly.

Done it...again...


<< Nothing to do with professional video cards, nor with fastwrites or sidebanding. uswc is a feature available to Pentium Pro and later supporting chipsets (440FX, LX(EX), BX(ZX), i8xx, etc) used to speed up graphic transfers across the PCI/AGP bus. In effect, what it does is kind of caches the display data and is a form of write combining.

Does anyone remember using Fastvid?

Here is the explanation from there:

This function allows seperate writes to the banked VGA mechanism to be
combined into a cacheline that can be bursted out to video memory via the PCI
bus. I believe this used to be handled in hardware but Intel decided to make
it a programable function with the Pentium Pro to make the motherboard
architecture more general. If you enable VGAWC with FASTVID PCI throughput
will increase from 18MB/sec (B0 motherboard) to 90MB/sec for programs that
use the banked VGA mechanism (most DOS games). If you enable only VGAWC on
an early motherboard (Write Posting remains off) the bus bandwidth increases
from 8MB/sec to about 40MB/sec. Some of the newer motherboards (ASUS for
instance) have this as a BIOS setup option.

This also applies to AGP as well as PCI.

Most modern cards can handle uswc and see a small performance increase as today, most Windows drivers enable uswc as well. 3Dfx has support for uswc in their driver for the original Voodoo1.

S3 chipsets like the S3 Virge family cannot handle uswc.
>>


;)
 

EfACTOR

Junior Member
Feb 3, 2001
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agp fast write ..only if vidcard is capable
vid cache mode..check vidcard if compliant se to uc if not
agp 4x ... 4x is default and is backward compatible
delayed trans..only if using ISA cards(8bit)
pci to dram..e.. when using byte merge**
ec dma..alows dma channel for parallel port in ecp mode..3
byte merge**
vid bios..test either way some cards faster shadowing to ram
instead of reading from card rom
also if ram has spd mod set to spd for ram..less lock ups
hope this helps
E
 

nicowju

Diamond Member
Jan 30, 2001
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What OS are you running?
Try going to System Information in Win98/ME or:
Administrative Tools->Computer Management->System Information->Hardware Resources->Conflicts/Sharing in Windows 2000.
If there are IRQ conflicts, and you can't move IRQ's around, try moving the cards to different slots so that nothing shares any IRQs with the vid card.
However, if you have ACPI as the computer type in Device Manager, then most likely every device will share the same IRQ (9 or 11 I believe). In that case, change the &quot;ACPI Computer&quot; in Device Manager to &quot;Standard PC&quot;.
Hope this helps
 

AndyHui

Administrator Emeritus<br>Elite Member<br>AT FAQ M
Oct 9, 1999
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Shagga: that looks like a familiar post....;)
 

Shagga

Diamond Member
Nov 9, 1999
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AndyHui - Sorry mate. Should have given the credit to you I suppose. Fair play to ya.

;)