Overclock.net › Forums › Volt Mods › General Volt Mods › Motherboard Volt Mods › Overvolting to enable good use of setFSB
New Posts  All Forums:Forum Nav:

Overvolting to enable good use of setFSB

post #1 of 6
Thread Starter 
Hi guys, first time poster so I apologize in advance if I get anything wrong.

I've recently built a Dual Xeon workstation using a supermicro X8DTU board, running two Xeon x5670's at 2.93GHz.
When I purchased the board I thought I could overclock using bios but was devastated when I couldn't.

So as usual I scoured google for days and came to the conclusion that since there were no Bios mods,
I had to use setFSB. Found my PLL and it was supported - I thought everything was gonna be great then on, but little did I know (if i am correct) without more voltage to the cpu, setFSB results were a measy 20 mhz more before my computer said NOPE and froze frown.gif

So I continued searching and learnt that I needed to do some on board soldering or mods to the PLL chip so I can enable setFSB to work to it's full potential.
And that is where I got stumped. I have no idea which pin to ground or cut, or which pin to solder.
I however did locate a full technical pdf of the PLL and was hoping someone could point me in the right direction.
Read something about grounding the TME pin PCI2 or something, not sure.
Below is a link of the data sheet.
THANKS IN ADVANCE!!!!

I am currently studying a mech Eng course at uni and I have only done baby electrical engineering so this is as far as I could get.


http://pdf1.alldatasheet.com/datasheet-pdf/view/446250/IDT/932S421BGLF.html


TLDR; setFSB freezes PC, need to overvolt PLL ICS932S421BGLF, don't know which pin(s) to mod.

cheers,
Jim.
post #2 of 6
Thread Starter 
okay I think I have found some progress:

All i have to do is set HIGH for pin 49, FS_B.
This will get me the config 0 1 1 for 166.67 mhz, the multiplier being 22 thus It will run at 3.67ghz

I know to get a 0 I just need to ground the pin, but what about setting to 1?
post #3 of 6
Remember when overclocking via fsb, you also overclock your ram at the same time. And that is most likely is that is causing your problem.

Those Xeons can do a lot more than 20mhz on stock volts. Most likely your RAM doesn't like being overclocked, try backing off the speed of the RAM in the Bios.


Also don't try and push the chip to 3.67ghz on stock volts.
Red Dragon
(19 items)
 
HTPC
(20 items)
 
HomeServer
(13 items)
 
CPUMotherboardGraphicsRAM
Intel Core i7 2600K @4.8ghz Asrock p67 Extreme4 GTX1080 G.SKILL Ripjaws X Series 16GB 9-11-11-31 2133MHz 
Hard DriveHard DriveHard DriveHard Drive
3x 640 WD blacks Raid 0 Mushkin Enhanced Reactor 512GB SSD Sandisk 1TB SSD Samsung 470 Series 128GB SSD 
CoolingOSMonitorKeyboard
XSPC Raystorm Windows 10 64bit Microboard m340clz 100hz 3440x1440 Corsair K70 
PowerCaseMouseAudio
TX850 HAF922 Logitech G502 Creative Sound Blaster Z  
AudioAudioAudio
Elac B6 & Dayton Audio SUB-800 Yamaha HTR-5790 Audio Technica ATH-A700 headphones 
CPUMotherboardGraphicsRAM
Q9550 @ 4GHZ Gigabyte EP45 UD3P GTX470 4GB OCZ Reaper 1150mhz 
Hard DriveHard DriveOptical DriveCooling
Western Digital Blue 500gb OCZ Vertex 2 60GB LG Bluray Corsair H50 
OSKeyboardPowerCase
Windows 7 Home Premium  Logitech K400 Corsair CX500 nMEDIAPC 6000B 
AudioOtherOtherOther
Yamaha HTR-5063 PS3 80GB BC PS3 with 250GB hard drive. Polk Audio Monitor 60s Bi-AMP Front Polk Audio Monitor 30s Rear 
OtherOther
Polk Audio CS1 Center Polk Audio PSW10 
CPUMotherboardGraphicsRAM
Xeon Harpertown 3.6ghz Asus P5Q SE/R HD7770 4GB DDR2 800mhz Corsair 
Hard DriveHard DriveHard DriveHard Drive
5TB Toshiba 5TB Toshiba 5TB Toshiba 2TB Hitachi 
Hard DriveHard DriveHard DriveOS
2TB Seagate 2TB Western Digital 1TB Hitachi Windows Home Server 2011 
Power
Corsair CX500 
  hide details  
Reply
Red Dragon
(19 items)
 
HTPC
(20 items)
 
HomeServer
(13 items)
 
CPUMotherboardGraphicsRAM
Intel Core i7 2600K @4.8ghz Asrock p67 Extreme4 GTX1080 G.SKILL Ripjaws X Series 16GB 9-11-11-31 2133MHz 
Hard DriveHard DriveHard DriveHard Drive
3x 640 WD blacks Raid 0 Mushkin Enhanced Reactor 512GB SSD Sandisk 1TB SSD Samsung 470 Series 128GB SSD 
CoolingOSMonitorKeyboard
XSPC Raystorm Windows 10 64bit Microboard m340clz 100hz 3440x1440 Corsair K70 
PowerCaseMouseAudio
TX850 HAF922 Logitech G502 Creative Sound Blaster Z  
AudioAudioAudio
Elac B6 & Dayton Audio SUB-800 Yamaha HTR-5790 Audio Technica ATH-A700 headphones 
CPUMotherboardGraphicsRAM
Q9550 @ 4GHZ Gigabyte EP45 UD3P GTX470 4GB OCZ Reaper 1150mhz 
Hard DriveHard DriveOptical DriveCooling
Western Digital Blue 500gb OCZ Vertex 2 60GB LG Bluray Corsair H50 
OSKeyboardPowerCase
Windows 7 Home Premium  Logitech K400 Corsair CX500 nMEDIAPC 6000B 
AudioOtherOtherOther
Yamaha HTR-5063 PS3 80GB BC PS3 with 250GB hard drive. Polk Audio Monitor 60s Bi-AMP Front Polk Audio Monitor 30s Rear 
OtherOther
Polk Audio CS1 Center Polk Audio PSW10 
CPUMotherboardGraphicsRAM
Xeon Harpertown 3.6ghz Asus P5Q SE/R HD7770 4GB DDR2 800mhz Corsair 
Hard DriveHard DriveHard DriveHard Drive
5TB Toshiba 5TB Toshiba 5TB Toshiba 2TB Hitachi 
Hard DriveHard DriveHard DriveOS
2TB Seagate 2TB Western Digital 1TB Hitachi Windows Home Server 2011 
Power
Corsair CX500 
  hide details  
Reply
post #4 of 6
Thread Starter 
Thanks! Maybe it's cause I am using ECC ram. Not sure. I will try to lower the speed of the ram.

If I do the PLL mod how come I can't push to 3.67? doesn't the voltage regulate if I config the PLL to a set frequency?
post #5 of 6
Thread Starter 
? so any steps in the right direction to get a sucessful overclock?
post #6 of 6
Any luck\updates with this?

I just got a HP ML350 G6 with dual X5650 xeons, also with the same PLL chip (932S421BGLF). I'm hoping to OC it too!

I haven't had any luck yet (system freezes with any change with setFSB, even to stock!). I will try under-speeding the RAM as that's just about all the BIOS lets me do frown.gif I also have ECC RAM.

There also seems to be another ICS chip on the board (9DB1200CGLF) which may be the real one?
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Motherboard Volt Mods
Overclock.net › Forums › Volt Mods › General Volt Mods › Motherboard Volt Mods › Overvolting to enable good use of setFSB