LGA 771 to 775 mod? \ VOGONS

LGA 771 to 775 mod?

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First post, by Rhuwyn

Posted on 2016-06-27, 23:22

Rhuwyn Offline

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Anyone here have much experiance with this. I have a number of 5 Series Xeons sitting around and a bunch of core 2 duo systems sitting around. The first one I tried this on is a Dell XPS 410 which uses a 965 Chipset. it looks like there has been a lot of success with that shipset and other Dells of the same generation are on the list as well. That being said I can get it to post with a Core2Duo 1.8Ghz and a Core2Quad Q6600, but I cant get a Xeon 5160 or a E5430 to post.

I see where some people have added microcodes but that seems to something they do more for compatibility and it generally doesn't prevent posting as far as I can tell. I confirmed my Core 2 processors still boot just fine.

Reply 1 of 6, by Oldskoolmaniac

Posted on 2016-06-28, 00:07

Oldskoolmaniac Offline

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http://www.delidded.com/lga-771-to-775-adapter/ Ive been planing on doing this to my hp

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Reply 2 of 6, by Oldskoolmaniac

Posted on 2016-06-28, 00:10

Oldskoolmaniac Offline

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http://www.ebay.com/itm/5x-LGA-771-to-775-MOD … IAAAOSwLzdWSN50 just be careful and do your research.

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Plastic parts looking nasty and yellow try this Deyellowing Plastic

Reply 3 of 6, by Oldskoolmaniac

Posted on 2016-06-28, 00:11

Oldskoolmaniac Offline

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also ur board needs to support the 1333fsb not 1066fsb

Motherboard Reviews The Motherboard Thread
Plastic parts looking nasty and yellow try this Deyellowing Plastic

Reply 4 of 6, by Rhuwyn

Posted on 2016-06-28, 03:59

Rhuwyn Offline

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Yes I've looked at that page and already purchased a good number of the adapters, I've got them installed on the Xeon's I tried and I still can't get the machine to post. Was curious if anyone here had any suggestions.

Reply 5 of 6, by Jolaes76

Posted on 2016-06-28, 06:16

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I am not so sure that an unsupported CPU should always POST or would not freeze early at startup.
I did the 771 to 775 mod on an ASUS P5K Pro, but I was going by the book:

1. modding BIOS while a supported 775 CPU was installed: replacing the lowliest supported Celeron with Xeon microcode to support my E5450
2. entering BIOS, making suggested default settings (cannot recall but probably energy saving features, speed throttling is not C2Q compatible)
3. modding the LGA 775 socket
4. applying tape between CPU and socket
5. boot with the E5450 installed

It worked instantly.
That is all I know. Maybe the microcode update would help in your case.

"Ita in vita ut in lusu alae pessima iactura arte corrigenda est."

Reply 6 of 6, by agent_x007

Posted on 2016-06-28, 06:33

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Ad. 3. There are CPU's with already cut places for LGA 775 socket pins.
In that case, you have to watch out while mounting this kind of CPU.
Basicly : It will fit any socket in two possible ways (775/771), BUT out of these two ways - it will work only in one.

Interesting thing is also a "BSEL Mod", for all the boards that support 1333/1600MHz FSB natively 😀

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