Are all LGA ### CPUs compatible with a LGA ### motherboard?

[corrado33]

Say, for example, I have an LGA 775 motherboard. Will ANY LGA 775 cpu work? I ask this because I was searching for good LGA 775 CPUs (yes I know essentially the core 2 quads are the best.) but it seemed that the answer on places like Toms hardware was "It depends on your motherboard." I'm a little ignorant in this regard, as I've only built a few PCs and have never had this problem. As long as you match up the specs (Socket, ram type) it should work. 

 

But then again LGA 775 spanned from DDR2 to DDR3 right? So would that put a limit on compatibility? 

 

Again, please excuse my ignorance. Trying to learn a bit. 

[Guest]

Yes. Should work. If mobo is 775 then LGA 775 socket cpu should work

[Unexas.]

2 minutes ago, corrado33 said:

Say, for example, I have an LGA 775 motherboard. Will ANY LGA 775 cpu work? I ask this because I was searching for good LGA 775 CPUs (yes I know essentially the core 2 quads are the best.) but it seemed that the answer on places like Toms hardware was "It depends on your motherboard." I'm a little ignorant in this regard, as I've only built a few PCs and have never had this problem. As long as you match up the specs (Socket, ram type) it should work. 

 

But then again LGA 775 spanned from DDR2 to DDR3 right? So would that put a limit on compatibility? 

 

Again, please excuse my ignorance. Trying to learn a bit. 

yes

[ARikozuM]

775 socket = 775 CPU

1150 socket = 1150 CPU

Socket determines CPU.

Motherboard determines RAM.

[Guest]

2 minutes ago, ARikozuM said:

775 socket = 775 CPU

1150 socket = 1150 CPU

Socket determines CPU.

Motherboard determines RAM.

and money determines everything

[corrado33]

3 minutes ago, dexxterlab97 said:

Yes. Should work. If mobo is 775 then LGA 775 socket cpu should work

Great. For the record, the build I'm messing around with is mostly blue. (Mobo/graphics card) I thought you'd appreciate that.

1 minute ago, ARikozuM said:

775 socket = 775 CPU

1150 socket = 1150 CPU

Socket determines CPU.

Motherboard determines RAM.

Interesting. I thought CPUs "required" a certain type of RAM so a CPU designed for a LGA 775 DDR2 board wouldn't work with a LGA 775 DDR3 board. Good to know though.

[xGGAx]

NO! especially for the 775 socket!! Ever heard of the wolfdale fiasco? Even the Conroes were not compaible with most 775 boards.

 

[SLAYR]

6 minutes ago, corrado33 said:

Say, for example, I have an LGA 775 motherboard. Will ANY LGA 775 cpu work?

No if it is an older 775 board it may have support  for only pentium 4/D cpus, and some have tdp limits on the cpus, there are other considerations that need to be looked at.

 

 

[corrado33]

9 minutes ago, xGGAx said:

NO! especially for the 775 socket!! Ever heard of the wolfdale fiasco? Even the Conroes were not compaible with most 775 boards.

 

 

9 minutes ago, SLAYR said:

No if it is an older 775 board it may have support  for only pentium 4/D cpus, and some have tdp limits on the cpus, there are other considerations that need to be looked at.

 

 

Ah, maybe that's why I was finding weird things online. I'll try to search for compatability. And no, I've never heard of the wolfdale fiasco. I kinda skipped over caring about computers for a decade... or so...

 

Even though both of these answers solved the question, I chose xGGAx's because their avatar was... "better."  

[ARikozuM]

3 minutes ago, corrado33 said:

Great. For the record, the build I'm messing around with is mostly blue. (Mobo/graphics card) I thought you'd appreciate that.

Interesting. I thought CPUs "required" a certain type of RAM so a CPU designed for a LGA 775 DDR2 board wouldn't work with a LGA 775 DDR3 board. Good to know though.

RAM and CPU's communicate through the chipset and motherboard which is why they will be compatible. As @xGGAx mentioned, LGA775 was a bit rocky while alive so be sure to check the motherboard's supported CPU's list.

[corrado33]

1 minute ago, ARikozuM said:

RAM and CPU's communicate through the chipset and motherboard which is why they will be compatible. As @xGGAx mentioned, LGA775 was a bit rocky while alive so be sure to check the motherboard's supported CPU's list.

Looks like my particular motherboard is "newer" and supports all of the quads and extremes. YAY.

 

No, I'm not turning this into a gaming PC, but it was a gaming motherboard from yesteryear and I'm kinda interested to see what it can do... It'll be a lowly server eventually.

[Guest]

Read motherboard manuals should be the best way of knowing if mobo really support that cpu or not

[xGGAx]

@corrado33  Well basically most manufacturers (even nvidia) claimed their boards were compatible with wolfdale but they were not.  Also, most 775 boards at the time the Conroes came out were not compatible with the core2 duos (or core 2 quads).

 

Conroe Compatibility:
http://www.dailytech.com/article.aspx?newsid=789

 

Wolfdale:

http://www.anandtech.com/show/2363

[The Reu]

23 minutes ago, corrado33 said:

Say, for example, I have an LGA 775 motherboard. Will ANY LGA 775 cpu work? I ask this because I was searching for good LGA 775 CPUs (yes I know essentially the core 2 quads are the best.) but it seemed that the answer on places like Toms hardware was "It depends on your motherboard." I'm a little ignorant in this regard, as I've only built a few PCs and have never had this problem. As long as you match up the specs (Socket, ram type) it should work. 

 

But then again LGA 775 spanned from DDR2 to DDR3 right? So would that put a limit on compatibility? 

 

Again, please excuse my ignorance. Trying to learn a bit. 

 

Often but not always.

 

LGA 775 had a long run through a few revisions starting with the last gen Pentium 4 and ending with Core2 Quad as well as some Xeons.  You need to be sure the chipset you use supports the FSB of the 775 chip you're looking at.  

 

It's less of an issue with newer sockets but, you should always verify CPU compatibility with each vendor.

[Electronics Wizardy]

26 minutes ago, corrado33 said:

 

Interesting. I thought CPUs "required" a certain type of RAM so a CPU designed for a LGA 775 DDR2 board wouldn't work with a LGA 775 DDR3 board. Good to know though.

Depends on the platform

 

The new intel and amd platforms have the memory controller on the cpu, so are limited to what the cpu supports, where older cpu's with the memorycontroller on the chipset, could use any memory standard. For example on lga 771/775 you could use ddr3, ddr2, and fbddr2. You could make a ddr4 lga 775 board if you wanted to and made a custom chip.

[zanthros]

It really depends if the bios supports the specific LGA 775 processor. After that it is gravy

[Thinkfreely]

34 minutes ago, corrado33 said:

Say, for example, I have an LGA 775 motherboard. Will ANY LGA 775 cpu work? I ask this because I was searching for good LGA 775 CPUs (yes I know essentially the core 2 quads are the best.) but it seemed that the answer on places like Toms hardware was "It depends on your motherboard." I'm a little ignorant in this regard, as I've only built a few PCs and have never had this problem. As long as you match up the specs (Socket, ram type) it should work. 

 

But then again LGA 775 spanned from DDR2 to DDR3 right? So would that put a limit on compatibility? 

 

Again, please excuse my ignorance. Trying to learn a bit. 

Usually yes, but you have to check the Bios as well because you will have the odd exception to this.

[KenjiUmino]

24 minutes ago, corrado33 said:

I thought CPUs "required" a certain type of RAM

true for modern CPUs because the memory controller is built into the CPU itself.

 

but on 775 CPUs the memory controller was still on the mobo/chipset - so socket 775 went all the way from DDR 1 with early boards for P4 to DDR 3 on the latest core compatible boards.