Overclock.net › Forums › Intel › Intel CPUs › P5LD2 550 Overclocking
New Posts  All Forums:Forum Nav:

P5LD2 550 Overclocking

post #1 of 16
Thread Starter 
I have a few issues that I am hoping the much more experienced O/C'ers can help me with....

The stock multiplier for my processor is 17x (17 x 200Mhz = 3.4Ghz). With 17x multiplier, my system is stable until I get to FSB 221 (884Mhz & CPU 3.757Ghz), at which point the system becomes unstable (sometimes it won't get past POST, and sometimes it gets to Windows and then reboots randomly). I tried upping Vcore a bit, but it didn't seem to have any effect.

I have also tried unlocking my multiplier and setting it to 14x. With 14x multiplier, my system is stable (*read below) with FSB up to 260 (1,040Mhz), which is the highest I've tried so far. With that setup, the processor is only moderately overclocked at 3.5Ghz. Only one problem.. when I set FSB set to 244 (976Mhz) or higher, anytime I reset or restart my computer (from within Windows or by pressing the reset button on the case), the system actually turns off, and then after about 3-4 seconds, turns itself back on. This happens as soon as I touch the reset button.

My mobo has voltage adjustments for Vcore, Memory, MCH, ICH, & FSB Termination Voltage. Should I ever need to touch the MCH, ICH, & FSB adjustments? I set the memory timings manually in BIOS to 4.4.4.12; I have good memory (Corsair XMS2 667Mhz 2x512 dual channel), but I honestly don't really know how to determine what timing settings I should mess with.

Does anyone have any opinions on what I should do to get my system stable @ a high overclock, and any ideas about the problems shown above?

Thanks in advance!
Dinosaur
(14 items)
 
  
CPUMotherboardGraphicsRAM
L724A760 G0 Q6600 3.5 Ghz (438x8) @ 1.4375v ASUS P5K Premium 1001 EVGA GTX470 4GB G.Skill Pi 8800 
Hard DriveOptical DriveCoolingOS
WD 74GB Raptor (x2) + Maxtor 200GB (x2) DVD-ROM & DVD-RW Corsair H50 Windows7-64 
MonitorKeyboardPowerCase
Dell 24" Widescreen Logitech G15 Corsair HX1000W TT Armor 
Mouse
Logitech G9 
  hide details  
Reply
Dinosaur
(14 items)
 
  
CPUMotherboardGraphicsRAM
L724A760 G0 Q6600 3.5 Ghz (438x8) @ 1.4375v ASUS P5K Premium 1001 EVGA GTX470 4GB G.Skill Pi 8800 
Hard DriveOptical DriveCoolingOS
WD 74GB Raptor (x2) + Maxtor 200GB (x2) DVD-ROM & DVD-RW Corsair H50 Windows7-64 
MonitorKeyboardPowerCase
Dell 24" Widescreen Logitech G15 Corsair HX1000W TT Armor 
Mouse
Logitech G9 
  hide details  
Reply
post #2 of 16
If you haven't done so, lock your PCI-E/PCI frequencies at 100/33.3 MHz. Not having those frequencies locked can cause major stability issues. RAM timings can seem a bit daunting at first, but they're really not all that hard to manage. If you don't know your stock timings off hand, download a program such as CPU-Z which will tell you the current values. As you increase your overclock, you have to loosen the timings as I'm sure you know. Run Memtest86 whenever you up your OC; if you get errors, you know that the combination of clock speed, timings, and vdimm are not stable. Upping vdimm one or two notches from stock is generally a good idea when overclocking. As for the timings, there are two approaches on how to set them. First, you can simply loosen the timings dramatically until you find the max for your system and then tighten them back down as far as is stable. Second (the way I prefer) is to very gradually loosen them as you increase your clock speed. Memtest is a great aid in determining when you'll need to loosen the timings. Since you're running 333 MHz RAM and a processor with a stock of 200 MHz, you have tons of room to overclock and maintain tight timings (relatively speaking for DDR667).
Sig rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q6600 G0 23A Asus P5K Deluxe Wifi HD 3870 2x2 GB G.Skill DDR2-800 
Hard DriveOptical DriveOSMonitor
2x250 GB Seagate RAID 0 + 320 GB Seagate Samsung SATA DVD Windows XP Pro/Vista Ultimate 64 bit Viewsonic VA2012wb 
KeyboardPowerCaseMouse
Saitek Eclipse Corsair HX620 Lian Li V2000b Logitech G7 
  hide details  
Reply
Sig rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q6600 G0 23A Asus P5K Deluxe Wifi HD 3870 2x2 GB G.Skill DDR2-800 
Hard DriveOptical DriveOSMonitor
2x250 GB Seagate RAID 0 + 320 GB Seagate Samsung SATA DVD Windows XP Pro/Vista Ultimate 64 bit Viewsonic VA2012wb 
KeyboardPowerCaseMouse
Saitek Eclipse Corsair HX620 Lian Li V2000b Logitech G7 
  hide details  
Reply
post #3 of 16
Thread Starter 
Here's what I have going right now:

FSB 224 x 17.0 multiplier = 3.808Ghz
PCI-E/PCI are locked at 100/33.3

Vmem = 1.90v
Vcore = 1.4375v

FSB:RAM = 1:1 using the stock timing of 4.4.4.12

My mobo has timing adjustments for the following:

DRAM CAS# Latency = 4 clocks
DRAM RAS# Precharge = 4 clocks
DRAM RAS# to CAS# Delay = 4 clocks
DRAM RAS# Activate to Precharge = 12 clocks
DRAM Write Recover Time = 4 clocks

I know the above numbers in BIOS correspond to the '4.4.4.12' that my ram is rated for, but I'm not sure which numbers correspond to which BIOS adjustment. Should I loosen all of them, one of them, or a specific combination of them? Should any of the settings always be changed together?

The PC boots fine and runs normally, except when I stress it with Prime95. I'm running 2 instances of Prime95 to get the CPU utilization to 100%. Prime95 will run for about 30 mins with no errors, and then the computer will just reboot all of a sudden with no warning. The max load temp I've seen after about 30 mins in Prime95 is 53°C. I have not tried upping Vcore above 1.4375v so far... Should I try upping it more?
Dinosaur
(14 items)
 
  
CPUMotherboardGraphicsRAM
L724A760 G0 Q6600 3.5 Ghz (438x8) @ 1.4375v ASUS P5K Premium 1001 EVGA GTX470 4GB G.Skill Pi 8800 
Hard DriveOptical DriveCoolingOS
WD 74GB Raptor (x2) + Maxtor 200GB (x2) DVD-ROM & DVD-RW Corsair H50 Windows7-64 
MonitorKeyboardPowerCase
Dell 24" Widescreen Logitech G15 Corsair HX1000W TT Armor 
Mouse
Logitech G9 
  hide details  
Reply
Dinosaur
(14 items)
 
  
CPUMotherboardGraphicsRAM
L724A760 G0 Q6600 3.5 Ghz (438x8) @ 1.4375v ASUS P5K Premium 1001 EVGA GTX470 4GB G.Skill Pi 8800 
Hard DriveOptical DriveCoolingOS
WD 74GB Raptor (x2) + Maxtor 200GB (x2) DVD-ROM & DVD-RW Corsair H50 Windows7-64 
MonitorKeyboardPowerCase
Dell 24" Widescreen Logitech G15 Corsair HX1000W TT Armor 
Mouse
Logitech G9 
  hide details  
Reply
post #4 of 16
You can safely raise vcore on Prescotts up to 1.525 volts (possibly further with better cooling). It wouldn't hurt to up the vcore a notch or two as you go along. Your temps are currently fine; just keep an eye on them as you go and try to keep the full load temp below 65°C (the world won't end of you exceed that by a bit, but it's the generally recommended max for that core). I'm far from an expert on RAM timings, but I generally bump the middle two, the last one, and then the first.

I would try bumping the vcore next as I don't expect you'll need to loosen RAM timings for quite a long way due to the high speed RAM you have in your rig.
Sig rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q6600 G0 23A Asus P5K Deluxe Wifi HD 3870 2x2 GB G.Skill DDR2-800 
Hard DriveOptical DriveOSMonitor
2x250 GB Seagate RAID 0 + 320 GB Seagate Samsung SATA DVD Windows XP Pro/Vista Ultimate 64 bit Viewsonic VA2012wb 
KeyboardPowerCaseMouse
Saitek Eclipse Corsair HX620 Lian Li V2000b Logitech G7 
  hide details  
Reply
Sig rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q6600 G0 23A Asus P5K Deluxe Wifi HD 3870 2x2 GB G.Skill DDR2-800 
Hard DriveOptical DriveOSMonitor
2x250 GB Seagate RAID 0 + 320 GB Seagate Samsung SATA DVD Windows XP Pro/Vista Ultimate 64 bit Viewsonic VA2012wb 
KeyboardPowerCaseMouse
Saitek Eclipse Corsair HX620 Lian Li V2000b Logitech G7 
  hide details  
Reply
post #5 of 16
Thread Starter 
Thanks for the info. I'll up Vcore a bit and see how it goes!

I'm still considering doing a 14x multiplier to get my FSB up quite a bit more... but when I am at 14x and go above 243 FSB, when I restart Windows or hit the reset button the machine shuts off for a few seconds and then turns back on. Is this a common happening running a high FSB?

Other than that anomaly, I've had my FSB at 266 x 14.0 and everything seemed stable.
Dinosaur
(14 items)
 
  
CPUMotherboardGraphicsRAM
L724A760 G0 Q6600 3.5 Ghz (438x8) @ 1.4375v ASUS P5K Premium 1001 EVGA GTX470 4GB G.Skill Pi 8800 
Hard DriveOptical DriveCoolingOS
WD 74GB Raptor (x2) + Maxtor 200GB (x2) DVD-ROM & DVD-RW Corsair H50 Windows7-64 
MonitorKeyboardPowerCase
Dell 24" Widescreen Logitech G15 Corsair HX1000W TT Armor 
Mouse
Logitech G9 
  hide details  
Reply
Dinosaur
(14 items)
 
  
CPUMotherboardGraphicsRAM
L724A760 G0 Q6600 3.5 Ghz (438x8) @ 1.4375v ASUS P5K Premium 1001 EVGA GTX470 4GB G.Skill Pi 8800 
Hard DriveOptical DriveCoolingOS
WD 74GB Raptor (x2) + Maxtor 200GB (x2) DVD-ROM & DVD-RW Corsair H50 Windows7-64 
MonitorKeyboardPowerCase
Dell 24" Widescreen Logitech G15 Corsair HX1000W TT Armor 
Mouse
Logitech G9 
  hide details  
Reply
post #6 of 16
Thread Starter 
I have Vcore set to 1.4625v and watching CPU-Z Vcore reading fluctuate down to about 1.41 and I even saw a 1.52 reading. Since I've been having alot of voltage fluctuations on this P5LD2 board, I may take it back tomorrow before I go out of town and exchange it for a P5WD2 Premium. Don't know if that board will solve the problem, but I think I'm gonna try.

I've read about alot of people successfully o/c'ing the heck out of that board.
Dinosaur
(14 items)
 
  
CPUMotherboardGraphicsRAM
L724A760 G0 Q6600 3.5 Ghz (438x8) @ 1.4375v ASUS P5K Premium 1001 EVGA GTX470 4GB G.Skill Pi 8800 
Hard DriveOptical DriveCoolingOS
WD 74GB Raptor (x2) + Maxtor 200GB (x2) DVD-ROM & DVD-RW Corsair H50 Windows7-64 
MonitorKeyboardPowerCase
Dell 24" Widescreen Logitech G15 Corsair HX1000W TT Armor 
Mouse
Logitech G9 
  hide details  
Reply
Dinosaur
(14 items)
 
  
CPUMotherboardGraphicsRAM
L724A760 G0 Q6600 3.5 Ghz (438x8) @ 1.4375v ASUS P5K Premium 1001 EVGA GTX470 4GB G.Skill Pi 8800 
Hard DriveOptical DriveCoolingOS
WD 74GB Raptor (x2) + Maxtor 200GB (x2) DVD-ROM & DVD-RW Corsair H50 Windows7-64 
MonitorKeyboardPowerCase
Dell 24" Widescreen Logitech G15 Corsair HX1000W TT Armor 
Mouse
Logitech G9 
  hide details  
Reply
post #7 of 16
Try setting all bios voltages to (auto) manual timimgs @ 4.0-4-4-8

I have 3.91mhz OC stable with 3.4/550 using Patriot pc-2 5600 2x512 FSB only 222. Then play with settings check my system its close to yours. Mine=
P5AD2-E Premium?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel 775 3.4x ASUS P5AD2-XE Asus E6600GT Patriot 5600 
Hard DriveOSMonitorKeyboard
WD 74 Raptor & WD Scsi 40 W2K Pro & XP Home '17 & 19' CRTs MS Net Series 
PowerCaseMouse
ANTEC 480 NEO POWER Antec "Super Lanboy" MS Optical 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel 775 3.4x ASUS P5AD2-XE Asus E6600GT Patriot 5600 
Hard DriveOSMonitorKeyboard
WD 74 Raptor & WD Scsi 40 W2K Pro & XP Home '17 & 19' CRTs MS Net Series 
PowerCaseMouse
ANTEC 480 NEO POWER Antec "Super Lanboy" MS Optical 
  hide details  
Reply
post #8 of 16
Thread Starter 
Quote:
Originally Posted by Oknilp
I have 3.91mhz OC stable with 3.4/550 using Patriot pc-2 5600 2x512 FSB only 222.
How are you getting 3,910Mhz with a 222Mhz FSB?
Dinosaur
(14 items)
 
  
CPUMotherboardGraphicsRAM
L724A760 G0 Q6600 3.5 Ghz (438x8) @ 1.4375v ASUS P5K Premium 1001 EVGA GTX470 4GB G.Skill Pi 8800 
Hard DriveOptical DriveCoolingOS
WD 74GB Raptor (x2) + Maxtor 200GB (x2) DVD-ROM & DVD-RW Corsair H50 Windows7-64 
MonitorKeyboardPowerCase
Dell 24" Widescreen Logitech G15 Corsair HX1000W TT Armor 
Mouse
Logitech G9 
  hide details  
Reply
Dinosaur
(14 items)
 
  
CPUMotherboardGraphicsRAM
L724A760 G0 Q6600 3.5 Ghz (438x8) @ 1.4375v ASUS P5K Premium 1001 EVGA GTX470 4GB G.Skill Pi 8800 
Hard DriveOptical DriveCoolingOS
WD 74GB Raptor (x2) + Maxtor 200GB (x2) DVD-ROM & DVD-RW Corsair H50 Windows7-64 
MonitorKeyboardPowerCase
Dell 24" Widescreen Logitech G15 Corsair HX1000W TT Armor 
Mouse
Logitech G9 
  hide details  
Reply
post #9 of 16
Quote:
Originally Posted by Kilzon
How are you getting 3,910Mhz with a 222Mhz FSB?
Your machine powering down for a few seconds during the high OCs sounds like your psu is nearly it's limits and is struggling to provide enough juice on the 12 volt rail. The 12v rail has to power your case fans,gpu,cpu and when powering up, this is a lot of current to provide. The exact same thing happened to me with my old power supply. When I added 2 more case fans, it was the straw that broke the camel's back.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel 2500k Asus P8P67 Galaxy GTX580 8GB G Skill Ripjaws 
Hard DriveOSMonitorKeyboard
Intel 80 gb SSD, Raptor 150 Windows 7 Home Premium 24" Samsung LCD Saitek Eclipse 
PowerCaseMouse
PCP&C 750W Antec P180 Logitech MX-510 blue 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel 2500k Asus P8P67 Galaxy GTX580 8GB G Skill Ripjaws 
Hard DriveOSMonitorKeyboard
Intel 80 gb SSD, Raptor 150 Windows 7 Home Premium 24" Samsung LCD Saitek Eclipse 
PowerCaseMouse
PCP&C 750W Antec P180 Logitech MX-510 blue 
  hide details  
Reply
post #10 of 16
As far as the processor is concerned, it shouldn't much care what the multiplier is to the best of my understanding. For example, the CPU you function very similarly at 200x20 and 400x10. The advantage of dropping the multiplier in a large part is due to increasing the frequency at which the RAM runs. In your case, since you have the option of dropping from 17x to 14x and since you have fast RAM, getting your system stable at 14x should give you better system performance.

Yes, vcore does tend to fluctuate some, especially on some Asus boards. You should take what you're reading from software with a grain of salt, though. Many motherboard sensors are read imperfectly within Windows and quite often show incorrect readings. Generally, vcore will drop down a bit between idle and load conditions. Once full load is applied, vcore should stabilize, though at a somewhat reduced value. If the vcore at load is bouncing around a lot, there's probably cause for concern. Fluctuations at idle appear to be somewhat more common and are less of a concern since the demands on the system are far less than when it's under load. All of that aside, the I've read a lot of good things about the mobo you're considering moving to as well, and it may well be worthwhile to make the move if you can do so economically, especially with the strange power issue with the 14x multiplier.
Sig rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q6600 G0 23A Asus P5K Deluxe Wifi HD 3870 2x2 GB G.Skill DDR2-800 
Hard DriveOptical DriveOSMonitor
2x250 GB Seagate RAID 0 + 320 GB Seagate Samsung SATA DVD Windows XP Pro/Vista Ultimate 64 bit Viewsonic VA2012wb 
KeyboardPowerCaseMouse
Saitek Eclipse Corsair HX620 Lian Li V2000b Logitech G7 
  hide details  
Reply
Sig rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q6600 G0 23A Asus P5K Deluxe Wifi HD 3870 2x2 GB G.Skill DDR2-800 
Hard DriveOptical DriveOSMonitor
2x250 GB Seagate RAID 0 + 320 GB Seagate Samsung SATA DVD Windows XP Pro/Vista Ultimate 64 bit Viewsonic VA2012wb 
KeyboardPowerCaseMouse
Saitek Eclipse Corsair HX620 Lian Li V2000b Logitech G7 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › P5LD2 550 Overclocking