help me oc my PEntium D915

[vmyap]

I just want to know what good settings should I use for this oc. I want to OC it upto 3.0GHz only from 2.8

My Specs:
Pentium D 915 2.8
Asrock 775Dual w/ asus vr guard (I Know not a very good HSF)
2x 1 GB Kingston ddr2 677 value rams
Palit NVIDIA 6600 Vanila AGP 8x vga

thank you

 

[f4phantom2500]

The FSB for that CPU is 200MHz, so the multiplier must be 14 (14 x 200 = 2800), so if you increase the FSB from 200MHz to 215MHz it will result in a CPU speed of 3010MHz.

 

[vmyap]

ah ic.. thank you.

will there a difference between cpu, pcie sync and cpu, pcie async? and should I leave the pci-e to 33.3? or set to cpu.

 

[996GT2]

Leave PCIe locked at 33.3 for overclocking...this way you do not simultaneously OC your PCIe bus and destabilize the system.

Keep the RAM divider at 533 if you have one (if not then 677). This is to make sure that you don't OC your RAM too much and destabilize the system (RAM speed increases with CPU speed by formula:
Adjusted RAM Speed=(CPU MHz/Divider)*2
At stock speeds:
The 533 divider would equal 11, since (2800/11)*2=509 and 509 is the largest possible value <533.
The 667 divider would equal 9, since (2800/9)*2=622 and 622 is largest possible value <667.

If you OC'd to 3 GHZ your RAM speed using the 533 divider would now become (3000/11)*2=545.5 MHz...same with other dividers and speeds

Once you get to a stable CPU clock you can experiment with different RAM speeds/timings/voltages to boost performance even more.


You might have to adjust CPU voltages in order to get a stable OC. To do this, test your system at the OC'd speed using Prime95, Orthos, or SuperPi. If it's not stable, increase the CPU Voltage slightly and keep testing.

This post is far from complete in terms of OCing information. I suggest you google around and get a good understanding of the basics of overclocking.

 

[myocardia]

Originally posted by: 996GT2
Leave PCIe locked at 33.3 for overclocking...this way you do not simultaneously OC your PCIe bus and destabilize the system.

That would be 66.6 Mhz below what a PCI-E bus is supposed to run at. Lock your PCI-E bus @ 100 Mhz, and your PCI bus to 33 Mhz, then start your overclocking.

 

[vmyap]

ok thank very much you...

 

[996GT2]

Originally posted by: myocardia

Originally posted by: 996GT2
Leave PCIe locked at 33.3 for overclocking...this way you do not simultaneously OC your PCIe bus and destabilize the system.

That would be 66.6 Mhz below what a PCI-E bus is supposed to run at. Lock your PCI-E bus @ 100 Mhz, and your PCI bus to 33 Mhz, then start your overclocking.

Oh my bad I saw didn't see the "e" there. But yeah, leave PCIe at 100 and PCI at 33.3 MHz.