Salkcin
05-13-2004, 09:26 AM
Hi
I wondered if anyone knows how to make a low tolerant output on a homemade Turbo.PLL. I've allready made a circuit wich I has got veryfied would work, but have'nt made it since it's voltage regulated and I think I'd calculate 30mV would make the FSB vary a whole MHz FSB. What I need is a stable variable Turbo.PLL and I think one of the later revisions of the original Turbo.PLL is so, but I only have common electronical knowledge so I have no idear why it's stable or how to stablelize a frequency.
The circuit I've made (http://users.cybercity.dk/~dsl30381/freqgencircuit.jpg)
Clock generator close-up on my Asus P4T-E (http://users.cybercity.dk/~dsl30381/p4tepllciruit.jpg)
The circuit can be a bit hard to identify, but I hope someone will take the time to correct it, give some hints on making a stable voltage output or give me a diagram over one they have made.
Regards
Salkcin
EDIT: I'm into the mod because my Asus P4T-E (Intel 850 RAMBUS board) is limited 100-132MHz 1/3PCI pci divider, 133-156 1/5 PCI divider and 133+150MHz 1/5PCI divider. With voltage mod my RAMBUS can do 166x4 at least. So the idea is to use the 133FSB - PCI1/5 and then just turn op the frequency until it can't overclock anymore. A 2.4/533 will be used for the task
I wondered if anyone knows how to make a low tolerant output on a homemade Turbo.PLL. I've allready made a circuit wich I has got veryfied would work, but have'nt made it since it's voltage regulated and I think I'd calculate 30mV would make the FSB vary a whole MHz FSB. What I need is a stable variable Turbo.PLL and I think one of the later revisions of the original Turbo.PLL is so, but I only have common electronical knowledge so I have no idear why it's stable or how to stablelize a frequency.
The circuit I've made (http://users.cybercity.dk/~dsl30381/freqgencircuit.jpg)
Clock generator close-up on my Asus P4T-E (http://users.cybercity.dk/~dsl30381/p4tepllciruit.jpg)
The circuit can be a bit hard to identify, but I hope someone will take the time to correct it, give some hints on making a stable voltage output or give me a diagram over one they have made.
Regards
Salkcin
EDIT: I'm into the mod because my Asus P4T-E (Intel 850 RAMBUS board) is limited 100-132MHz 1/3PCI pci divider, 133-156 1/5 PCI divider and 133+150MHz 1/5PCI divider. With voltage mod my RAMBUS can do 166x4 at least. So the idea is to use the 133FSB - PCI1/5 and then just turn op the frequency until it can't overclock anymore. A 2.4/533 will be used for the task