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Intel BSEL & VID mod Guide

post #1 of 511
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BSEL & VID Mod Guide

This mod applies to most, if not all, Intel socket 775 CPU’s that use a 800MHz or 1066MHz FSB.

What is a BSEL mod?

A BSEL mod allows a CPU to be run at a higher speed via hardware modification, without changing any settings in software (Either the BIOS or via software such as SetFSB). Most motherboards (See notes for more about this) use voltage/ground from the pins on a CPU to determine the CPU’s FSB. The idea of a BSEL mod is to physically connect pins on a CPU, to make the motherboard ‘think’ that the CPU has a higher FSB than it actually does.

For example, the Intel Pentium Dual Core E2160 CPU (1.8GHz) has an FSB at 800MHz, a bus speed of 200MHz and a multiplier of 9 to give the CPU its speed of 1.8GHz (200 x 9). Now, if the pins on the CPU are connected like a CPU with a FSB of 1066MHz, the bus speed would now be 266MHz, and the CPU would now run at 2.4GHz (266 x 9).

Why would I need to do this?

If you’re motherboard can overclock your CPU from the BIOS, you probably don’t need a BSEL mod. However, for motherboards that have no overclocking settings, like OEM motherboards, this is a simple method of overclocking a CPU. Alternatively, if your motherboard’s BIOS has difficulty overclocking, the mod is a simple way to increase the CPU speed.

How do I do the mod?

To connect the pins on the CPU you will need:

Conductive ink pen or copper tape
Electrical tape
Patience

Connecting the pins:

Refer to the diagrams in this guide to make sure you’re connecting the right pins. Then, mask the pins you aren’t connecting with electrical tape, this isn’t 100% necessary but makes the job of connecting pins much easier. Connect the desired pins using the conductive ink pen, go grab a drink and a sandvich, and by the time you get back the ink should have dried.

BSEL mod diagrams







VID Mod

The VID mod is similar to the BSEL mod, but instead of increase the CPU’s frequency, it increases the voltage; it is done in the same way as the BSEL mod.

VID mod diagrams (GREEN = COVER)





Notes

•This is still an overclock, so it would be wise to stress test using Orthos, Prime95 Etc.
•To reverse the mod, simple remove the pin connections.
•It may be necessary to reset the BIOS to apply the mod.
•Intel Speedstep still works with the mod applied.
•Some motherboards use the CPUID to calculate the CPU FSB and not the pins, this mod WILL NOT work on these motherboards.

Acknowledgements:

Dasparx
VR-Zone
Edited by japan1 - 1/7/11 at 12:47pm
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post #2 of 511
thanks ....
will be done soon
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post #3 of 511
i have Abit i45c mobo with 945gc chipset, but when i install the E2160 which i bsel mod to 1333fsb,..... the mobo only recognise 266/1066fsb at 2.4ghz...why? please advice!!!!! Thanks!!!
post #4 of 511
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Quote:
Originally Posted by Donovantys View Post
i have Abit i45c mobo with 945gc chipset, but when i install the E2160 which i bsel mod to 1333fsb,..... the mobo only recognise 266/1066fsb at 2.4ghz...why? please advice!!!!! Thanks!!!
Just looked at the specs of that board:
Quote:
Front Side Bus 1066MHz
800MHz
533MHz
It only support FSB's up to 1066 and doesn't support 1333 so thats why its only booting with @ 1066.
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post #5 of 511
which one is the real E2160 mod to 1333fsb
post #6 of 511
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Quote:
Originally Posted by Donovantys View Post
which one is the real E2160 mod to 1333fsb
Both do the same thing, as they both connect BSEL2 to VSS (ground) they just do it differently. But niether will work on your motherboard, you best option would be to use the 1066 bsel then manually raise the FSB in your bios and you may be able to get to 1333 that way.
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post #7 of 511
But the manual say it FSB1333 cpu will operate in overclocking mode, doesn't that mean 1333 is supported???

Specifications
CPU LGA755 Socket for Intel® Core™ 2 Duo/ Pentium® Dual-Core/ Pentium® D/ Pentium® 4/ Celeron® D Processors with 1333*/1066/800/533 MHz FSB
*(FSB1333 CCPU will operate in over-clocking mode. Under this situation, PCIE frequency will also be over-clocked to 115MHz.)
Supports Intel® Hyper-Threading Technology
post #8 of 511
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Quote:
Originally Posted by Donovantys View Post
But the manual say it FSB1333 cpu will operate in overclocking mode, doesn't that mean 1333 is supported???

Specifications
CPU LGA755 Socket for Intel® Core™ 2 Duo/ Pentium® Dual-Core/ Pentium® D/ Pentium® 4/ Celeron® D Processors with 1333*/1066/800/533 MHz FSB
*(FSB1333 CCPU will operate in over-clocking mode. Under this situation, PCIE frequency will also be over-clocked to 115MHz.)
Supports Intel® Hyper-Threading Technology
I had an Asrock board that used the 945 chipset, which also said it supports 1333 in overclocking mode and it did the exact same thing. The 1333 BSEL mod will only work on motherboards that support 1333 FSB's natively, and the 945 chipset only supports upto 1066 natively. Although, I managed 3Ghz on my old Asrock board by doing the 1066 BSEL then overclocking in the bios and abit boards are much better than Asrock so you should be able to do the same.
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post #9 of 511
The abit i45c doesn't support bios overclocking, so i have to do it in window, is there any good overclocking software you can recommend.. thanks alot
post #10 of 511
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