[MOD] LGA771 to LGA775 CPU modification tutorial

[thatguy321]

well i buy cpus from china and south korea all the time, they are better packed and condition than most things i get from the uk and europe tbh.

I feel like I'd be more comfortable with a CPU from china, they're more robust and there's so much less to go wrong with them compared to mobos. That said, they do have some of the best prices on P45's.

 

 

How's a P35 hold up to OC'ing LGA771 Xeons?

[Jumper118]

I feel like I'd be more comfortable with a CPU from china, they're more robust and there's so much less to go wrong with them compared to mobos. That said, they do have some of the best prices on P45's.

 

 

How's a P35 hold up to OC'ing LGA771 Xeons?

its pretty good as long as you stick to CPUs with higher multi of at last 8x.

[harrynowl]

I feel like I'd be more comfortable with a CPU from china, they're more robust and there's so much less to go wrong with them compared to mobos. That said, they do have some of the best prices on P45's.

 

 

How's a P35 hold up to OC'ing LGA771 Xeons?

P35 is good as well, but sometimes the boards are a bit more variable.

[agent_x007]

P35 ?
U can OC'ed them quite good on even P965 chipset (if U want).
But like others said it's MB dependant
Even best chipset is worth nothing, if MB's VRM section sucks.

[thatguy321]

Are the LGA Xeons usually binned well enough to make a single step (333-->400) without a Vcore increase? Or do the the 45nm processors have less wiggle room then the older 65nm?

[Jumper118]

Are the LGA Xeons usually binned well enough to make a single step (333-->400) without a Vcore increase? Or do the the 45nm processors have less wiggle room then the older 65nm?

well its quite a big jump so it might need a bit more voltage tbh. Also the steeping is important to how it overclocks as well

[thatguy321]

well its quite a big jump so it might need a bit more voltage tbh. Also the steeping is important to how it overclocks as well

Is it C0 and E0 for the X54xx Xeons? Which is better?

[Jumper118]

Is it C0 and E0 for the X54xx Xeons? Which is better?

E0 i'm making a byers guide right now

[thatguy321]

E0 i'm making a byers guide right now

Can you link to it from here when you finish it?

 

I made sure to get G0 on the X3210 I got coming.

[Jumper118]

Can you link to it from here when you finish it?

 

I made sure to get G0 on the X3210 I got coming.

yes good

[thatguy321]

Well I saw a X5450 listed on eBay but the stepping wasn't noted and the picture wasn't real clear, so I shot the seller a email asking for all the text on the processor lid. Turns out it's SLBBE, throw him an offer of $17, he took it, sooo....

 

Got it coming and ordered some conversion tabs along with it

[Jumper118]

Well I saw a X5450 listed on eBay but the stepping wasn't noted and the picture wasn't real clear, so I shot the seller a email asking for all the text on the processor lid. Turns out it's SLBBE, throw him an offer of $17, he took it, sooo....

 

Got it coming and ordered some conversion tabs along with it

great the x5450 is a really fast chip.  

[thatguy321]

Sooo, looking up BSEL mods for Harpertown chips and found this: http://www.xtremesystems.org/forums/showthread.php?204098-Clovertown-Bsel-mod

 

At first it just talk of what pin(s) to work with/tape, but then a guy further down mentions overvolting the processor using the same idea as the BSEL mod, thus creating a OC'ed processor that you could theoretically drop into any motherboard (that support the FSB) and run with it. One guy said he was gonna try it but then never reported back. Anyone here ever tried it?

 

I believe Vcore on the board I currently have is locked, but it supports up to 1600FSB.

[Cheddle]

Sooo, looking up BSEL mods for Harpertown chips and found this: http://www.xtremesystems.org/forums/showthread.php?204098-Clovertown-Bsel-mod

 

At first it just talk of what pin(s) to work with/tape, but then a guy further down mentions overvolting the processor using the same idea as the BSEL mod, thus creating a OC'ed processor that you could theoretically drop into any motherboard (that support the FSB) and run with it. One guy said he was gonna try it but then never reported back. Anyone here ever tried it?

 

I believe Vcore on the board I currently have is locked, but it supports up to 1600FSB.

 

 

I am trying a volt mod in the coming weeks. would love to hear of some experience from users... 

 

Here are some somewhat useful images

this one is the table for 5400 series xeons and the resulting voltage.

 

this one is the pin grid view of the CPU with some example voltage mods.

[thatguy321]

I am trying a volt mod in the coming weeks. would love to hear of some experience from users... 

 

Here are some somewhat useful images

this one is the table for 5400 series xeons and the resulting voltage.

a28e4645_5400voltagedefpw41.png

 

this one is the pin grid view of the CPU with some example voltage mods.

xeontuxvidmod.gif

 

Have you had a chance to mess around with this at all yet?

[thatguy321]

Alright, came across a pretty good deal on a ASUS P5Q Pro, but the kicker is that it has 3rd party firmware that the seller described as "basically the p5q-pro firmware + overclocking ripped from the p5q-deluxe firmware". I'm assuming by firmware he means a custom bios essentially, right?

 

Does anyone know of any 3rd party firmware for these boards? If it was good/stable? And, does it work with the LGA771 Xeons?

 

Is it possible to flash it back to original bios once something like this has been done?

[bomerr]

16 minutes ago, thatguy321 said:

Alright, came across a pretty good deal on a ASUS P5Q Pro, but the kicker is that it has 3rd party firmware that the seller described as "basically the p5q-pro firmware + overclocking ripped from the p5q-deluxe firmware". I'm assuming by firmware he means a custom bios essentially, right?

 

Does anyone know of any 3rd party firmware for these boards? If it was good/stable? And, does it work with the LGA771 Xeons?

 

Is it possible to flash it back to original bios once something like this has been done?

Probably but if the mobo works why bother messing with the BIOS?

 

Just FYI, it's not worth messing around with these LGA 771/775 stuff nowadays. They'll botleneck even a GTX 750 Ti. You are better off just getting the lowest end i3 with a B motherboard. 

[harrynowl]

1 minute ago, bomerr said:

Probably but if the mobo works why bother messing with the BIOS?

 

Just FYI, it's not worth messing around with these LGA 771/775 stuff nowadays. They'll botleneck even a GTX 750 Ti. You are better off just getting the lowest end i3 with a B motherboard. 

a nicely overclocked x5450 is not far from a 2500k at stock. 

 

[thatguy321]

1 minute ago, bomerr said:

Probably but if the mobo works why bother messing with the BIOS?

 

Just FYI, it's not worth messing around with these LGA 771/775 stuff nowadays. They'll botleneck even a GTX 750 Ti. You are better off just getting the lowest end i3 with a B motherboard. 

Haha, no they wont first off and I got a i5/GTX 680 main rig anyways, this is pretty much just for fun.

[bomerr]

1 minute ago, thatguy321 said:

Haha, no they wont first off and I got a i5/GTX 680 main rig anyways, this is pretty much just for fun.

I had  a Q9400, bottlenecked hard, Mine wasn't stable OC'd, YMMV.

 

The only reason I would ever spend money on this platform is if you already have the mobo. But having to buy the mobo too makes it a very big waste of money. 

[Dabombinable]

7 minutes ago, bomerr said:

Probably but if the mobo works why bother messing with the BIOS?

 

Just FYI, it's not worth messing around with these LGA 771/775 stuff nowadays. They'll botleneck even a GTX 750 Ti. You are better off just getting the lowest end i3 with a B motherboard. 

No, they don't-and at 4.4GHz even a GTX 970 isn't bottlenecked.

[thatguy321]

2 minutes ago, bomerr said:

I had  a Q9400, bottlenecked hard, Mine wasn't stable OC'd, YMMV.

 

The only reason I would ever spend money on this platform is if you already have the mobo. But having to buy the mobo too makes it a very big waste of money. 

I already have the CPU/RAM/LGA771 to 775 conversion tabs/mobo/etc. This would just be a mobo upgrade so that I could push the overclock further. Just trying to see if these guys have any experience with 3rd party firmware on this particular board (ASUS P5Q Pro) and if it likely will still supports the LGA771 Xeons.

 

And like I said in the first post, the price is really good. Like only have to skip lunch out a few days good.

[Dabombinable]

7 minutes ago, bomerr said:

I had  a Q9400, bottlenecked hard, Mine wasn't stable OC'd, YMMV.

 

The only reason I would ever spend money on this platform is if you already have the mobo. But having to buy the mobo too makes it a very big waste of money. 

Q9400 are pretty much the worst desktop 45nm C2Q so that's your problem. The Xeons we are talking about have double the L2 cache, run at a lower stock voltage and are all excellent for overclocking.

[thatguy321]

58 minutes ago, thatguy321 said:

Alright, came across a pretty good deal on a ASUS P5Q Pro, but the kicker is that it has 3rd party firmware that the seller described as "basically the p5q-pro firmware + overclocking ripped from the p5q-deluxe firmware". I'm assuming by firmware he means a custom bios essentially, right?

 

Does anyone know of any 3rd party firmware for these boards? If it was good/stable? And, does it work with the LGA771 Xeons?

 

Is it possible to flash it back to original bios once something like this has been done?

Any ideas fellas?

[Dabombinable]

15 minutes ago, thatguy321 said:

Any ideas fellas?

Nope, running the stock bios on my motherboards