Posted: Mon Oct 13, 2008 2:39 pm
No luck with disabling the L2 cache.
I got stuck with Gigabyte and ASUS boards based on the Alladin 5 chipset and I found 8ns tagram too, I don't think we'll ever find faster tagram which is pin compatible. Then again, I don't believe the tagram is holding me back, 125MHz (8ns) to 133MHz is 'only' 8MHz higher while I have the tagram overvolted to over 4V (standard is 3.3V). It should be doable. Just to be sure I could electronically cut of the tagram chip, but at this moment I'm rather thinking that the 5V line could be of a problem.
From the SIS530 datasheet:
NAME TYPE ATTR DESCRIPTION
DVDD PWR +3.3V DC Power Source :
OVDD3 PWR +3.3V DC Power Source :
OVDD2 PWR +3.3V/2.5V DC Power Source:
5VDD PWR 5V DC Power Source :
One of the filtering caps just next to the tagram chip reads 5V, I'm going to open up my adjustable PSU again and add 5V line regulation before actually trying to remove the tagram chip.
Concerning enable/disable the VGA, what about the following register settings:
Although the following register setting might have more effect:
Another interesting note:
More:
On other boards, if you disable the onboard VGA, do you use the BIOS setting or a jumper?
I got stuck with Gigabyte and ASUS boards based on the Alladin 5 chipset and I found 8ns tagram too, I don't think we'll ever find faster tagram which is pin compatible. Then again, I don't believe the tagram is holding me back, 125MHz (8ns) to 133MHz is 'only' 8MHz higher while I have the tagram overvolted to over 4V (standard is 3.3V). It should be doable. Just to be sure I could electronically cut of the tagram chip, but at this moment I'm rather thinking that the 5V line could be of a problem.
From the SIS530 datasheet:
4.7. POWER SIGNALS9.2 DC CHARACTERISTICS
TA = 0 - 70 0C, VDD = 3.3 V ± 5 %, VDD 5= 5 V ± 5 %,GND = 0 V
NAME TYPE ATTR DESCRIPTION
DVDD PWR +3.3V DC Power Source :
OVDD3 PWR +3.3V DC Power Source :
OVDD2 PWR +3.3V/2.5V DC Power Source:
5VDD PWR 5V DC Power Source :
One of the filtering caps just next to the tagram chip reads 5V, I'm going to open up my adjustable PSU again and add 5V line regulation before actually trying to remove the tagram chip.
Concerning enable/disable the VGA, what about the following register settings:
Code: Select all
SR11: EXTENDED DDC AND POWER CONTROL REGISTER
Register Type: Read/Write
Read/Write Port: 3C5, Index 11h
Default: 00h
D7 Force VGA into suspend mode
0: Disable
1: Enable
D6 Force VGA into standby mode
0: Disable
1: Enable
Code: Select all
VGA ENABLE REGISTER
Register Type: Read/Write
Read/Write Port: 3C3 or 46E8
Default: 00h
D0 VGA Enable (for 3C3 only)
0: Disable
1: Enable
D3 VGA Enable (for 46E8 only)
0: Disable
1: Enable
Code: Select all
The integrated 3D VGA controller has built-in two timers for stand-by and suspend modes
that can be programmed from 2 minutes to 30 minutes (2 min./increase) with the extended
registers.
The integrated 3D VGA controller also supports forcing the video subsystem into stand-by,
suspend, or off modes with the extended registers.
Code: Select all
HARDWARE TRAPPING DESCRIPTION
There are some pins are used for trapping purpose to identify the hardware configurations at
the power-up stage. These pins will be recognized as “1” if pull-up resistors are used; and will
be recognized as “0” if pull-down resistors are used. The following table is a summary of all
the Hardware Trap pins in SiS Chip.
SYMBOL DESCRIPTION
Symbol: MD62 Function: Control for Integrated VGA Controller
Pull-up: Disable
Pull-down: Enable