How do LGA 771 to 775 mod stickers work?

[EquineHero]

Like what do they actually do?

 

[Supahos]

Cover a pin up and make them read as a 771 chip

 

[Paul NZ]

Altho one guy the other week had one if you wanted to update the BIOS you cant

 

[Ecky]

It's not just covering up some pins, 771 and 775 have some of their pins in different places and the stickers "swap" those locations on the bottom of the CPU. You still need a modded BIOS with support for the Xeon.

 

[EquineHero]

My I asked a different question a little bit ago and I was referenced to a site that had a list of Xeons that worked with non-hacked bioses. I found one for my machine and ordered it up, I just wanted to understand how the mod stickers actually functioned.

 

[EquineHero]

It's not just covering up some pins, 771 and 775 have some of their pins in different places and the stickers "swap" those locations on the bottom of the CPU. You still need a modded BIOS with support for the Xeon.

Also, according to this site, my motherboard is compatible with all Xeons - is this without adding the microcode? If I wanted to co back to a Core 2 Quad would I have to remove the microcode?

 

[EquineHero]

One more thing. How do I get my .BIN file or my .ROM file from my BIOS chip?

Edit: Got the .BIN file. So here's the list of my microcodes:

CPUID=6FD Rev=A3 2007/08/13 CRC=89C0D09E Off=D6FE0 Size=1000 Plat=0
CPUID=6FB Rev=B6 2007/07/13 CRC=B3176C40 Off=D7FE0 Size=1000 Plat=0
CPUID=6F9 Rev=82 2006/09/03 CRC=59C9FE00 Off=D8FE0 Size=1000 Plat=0
CPUID=6F6 Rev=C6 2007/03/07 CRC=B1BFF977 Off=D9FE0 Size=1000 Plat=0
CPUID=6F5 Rev=33 2006/05/01 CRC=6A962F22 Off=DAFE0 Size=1000 Plat=0
CPUID=6F5 Rev=33 2006/05/01 CRC=6A962ED3 Off=DBFE0 Size=1000 Plat=4,6
CPUID=6F4 Rev=25 2006/02/27 CRC=D8AB5036 Off=DCFE0 Size=1000 Plat=0,2,
CPUID=6F4 Rev=26 2006/03/12 CRC=DA8E97D1 Off=DDFE0 Size=1000 Plat=0,2,
CPUID=6F1 Rev=11 2005/10/10 CRC=A28ACD13 Off=DEFE0 Size=1000 Plat=0,1,
CPUID=6F2 Rev=5A 2007/09/26 CRC=594DDBA0 Off=DFFE0 Size=1000 Plat=0
CPUID=6F0 Rev=05 2005/08/18 CRC=6D5B2CAB Off=E0FE0 Size=1000 Plat=5
CPUID=6F0 Rev=05 2005/08/18 CRC=6D5B2CC7 Off=E1FE0 Size=1000 Plat=2
CPUID=6F0 Rev=05 2005/08/18 CRC=6D5B2CCA Off=E2FE0 Size=1000 Plat=0
CPUID=10661 Rev=38 2007/09/19 CRC=8A2D6F19 Off=E3FE0 Size=1000 Plat=0
CPUID=10660 Rev=04 2006/06/12 CRC=6CC60901 Off=E4FE0 Size=1000 Plat=0,
CPUID=6FB Rev=B6 2007/07/13 CRC=5E5A71A7 Off=E5FE0 Size=1000 Plat=4
CPUID=6F7 Rev=66 2007/03/08 CRC=FEA82C68 Off=E6FE0 Size=1000 Plat=4
CPUID=1067A Rev=A07 2008/04/09 CRC=83067F5A Off=E7FE0 Size=2000 Plat=0
CPUID=10677 Rev=705 2008/04/28 CRC=A6DB99DD Off=E9FE0 Size=2000 Plat=4
CPUID=10676 Rev=60C 2008/01/19 CRC=FBAC0F5D Off=EBFE0 Size=1000 Plat=4
CPUID=10676 Rev=60C 2008/01/19 CRC=FBAC0F6C Off=ECFE0 Size=1000 Plat=0

Are any of these for Xeons?

 

[Lifeofgold]

This question is a few months old, but I will try to answer for anyone else searching. Adding the microcodes to the BIOS is to enable certain features that may be available on the Xeon the would not be on the Core 2 Duo /Quad CPU. Having the ability to enable those features is not a problem when switching back to a true LGA 775 CPU UNLESS you changed one of the microcodes already in the original BIOS. Research as much as you can before you do this. Follow the steps carefully and take notes on the changes. If you know that you are not just adding additional microcodes but actually making a change, be sure to keep a copy of the original BIOS just in case. Here is a youtube video with a good tutorial and a link to delidded.com that has more info.

https://www.youtube.com/watch?v=HUqBW-kq1_0

http://www.delidded.com/

 

[Windrunner]

do cpu's modded like this have less performance than in original 771 sockets? because of covered pins,maybe even 5-6 of them?

 

[EquineHero]

do cpu's modded like this have less performance than in original 771 sockets? because of covered pins,maybe even 5-6 of them?

No, they aren't covered up. It swaps the placement of two pins and the Xeons are CONSIDERABLY faster than the 775 processors. Originally I had a Q9400 and I modded a X5460...Fallout 4 capable!

 

[Windrunner]

ohh,i get it. there's just two pins replaced,the rest of the sticker does nothing. thank you.

 

[EquineHero]

ohh,i get it. there's just two pins replaced,the rest of the sticker does nothing. thank you.

The rest of the sticker holds the pin swap wires on, so don't cut it. You can google images of how and where it goes on, at least that's what I did. Your BIOS also has to support it.

 

[MU_Engineer]

Like what do they actually do?

The stickers have a conductive trace in them. This changes the voltage at the two contacts that the chip uses to identify to the motherboard what socket the chip is designed for. The chip without the sticker will identify as LGA771, and with the sticker, will identify as LGA775.

LGA771 and LGA775 CPUs otherwise only differ in that the LGA771 socket has two little index notches while LGA775 CPUs have one. You cannot put an LGA775 CPU in an LGA771 socket as the second notch will prevent the CPU from seating in the socket. You can place an LGA771 CPU in an LGA775 motherboard but without the tape trick, it will identify itself as an LGA771 CPU and the motherboard will fail to boot it. The tape trick will have the CPU identify itself as an LGA775 CPU and it will boot. Performance will be identical to a Core 2 with the same number of cores and L2 cache, as they use the same dies and the non-disabled features in the Xeon such as SMP are ignored with a single socket consumer board.

@EquineHero,

The reason the X5460 Xeons are faster than a Core 2 Quad Q9400 is because you went from a 2.67 GHz chip with two 3 MB L2s to a 3.17 GHz chip with two 6 MB L2s- the underlying chip is much faster.