Processor Will a intel core 2 quad q6600 processor work with this board?I installed one and when i power it up all it does is rev up the fans to full speed and not load up the computer.

Yes it's compatible. The type of motherboard can be any board that uses "Socket 775".

Motherboard supports the following processor upgrades:

• Intel Core 2 Quad (Y) Q9xxxx
• Intel Core 2 Duo (W) E8xxx
• Intel Core 2 Quad (K) up to Q6600
• Core 2 Duo E6x00 (C) up to E6700
• Core 2 Duo E4x00 (C) up to E4400

With the flood of information you posted I can barely sift through it

Do I assume you are referring to a Dell Inspiron 518 desktop computer's, processor; to go into a Dell Optiplex GX280 desktop computer?

You know Dell is a computer company that was founded on the principle, to give the customer what they wanted; and to be able to choose from several options.

That being stated, in reality I have no idea of what Processor is in YOUR Dell Inspiron 518, or Optiplex GX280.

However, if I am to assume the specs (Specifications), shown in the following link to be true; for Your computer, then the answer is NO,

http://reviews.cnet.com/desktops/dell-inspiron-518/4505-3118_7-33186145.html

States an Intel Quad Core Q6600 processor.
(Operates at a maximum frequency rate {'Speed'} of 2.4GigaHertz.
2.4GHz )

Now let's look at the Dell Optiplex GX280 specifications,

http://reviews.cnet.com/desktops/dell-optiplex-gx280/4507-3118_7-30998912.html

Both the Inspiron 518, and the Optiplex GX280 use an LGA 775 processor socket, on the motherboard.

This is good because both the Intel Quad Core Q6600, and the Intel Pentium 4, model 540; use the LGA 775 processor socket,

http://en.wikipedia.org/wiki/Socket_T

What is Not good, is the motherboard chipset used on the Optiplex GX280, will Not support a dual core processor; much less a quad core processor.

The motherboard chipset for the Optiplex GX280 is an Intel 915G,

http://en.wikipedia.org/wiki/List_of_Intel_chipsets#Pentium_4.2FPentium_D.2FPentium_EE_chipsets

The Intel 915G chipset supports Single Core processors -> ONLY.
Intel Pentium 4, or Intel Celeron D.

Front Side Bus (FSB) support is either 533MegaHertz, or 800MHz.

The Intel Celeron D is NOT a dual core processor,

http://en.wikipedia.org/wiki/Intel_Celeron#Prescott-256

"The Intel Celeron D processor works with the Intel 845 and 865 chipset families.

The D suffix actually has no official designation, and does not indicate that these models are dual-core.

It is used simply to distinguish this line of Celeron from the previous, lower performing Northwood and Willamette series, and also from the mobile series, the Celeron M (which also uses 3xx model numbers).
Unlike the Pentium D the Celeron D is NOT a dual core processor."

The Inspiron 518 has an Intel G33 motherboard chipset,

http://reviews.cnet.com/desktops/dell-inspiron-518/4507-3118_7-33186145.html

http://en.wikipedia.org/wiki/List_of_Intel_chipsets#Core_2_chipsets

Scroll down to G33 in the left column.
Read across, and look at the headings above.

Here we see the Intel G33 motherboard chipset, supports dual core, and quad core processors.
Intel Pentium Dual Core, Intel Core 2 Duo, and Intel Core 2 Quad.

Front Side Bus (FSB) support is for processors, that have either an 800MegaHertz FSB, or 1066MHz FSB, or 1333MHz FSB.

Short answer?

If it is a dual core, or quad core Intel processor, the answer is NO.

Do you know how to find out what processor is in the Inspiron 518, and the Optiplex GX280?

1) Are the computers working, and internet ready?

No?

2) Do you know about Anti-Static Procedures, and how to read the sSpec number on the processor?

Post back in a Comment.

Regards,
joecoolvette

Your motherboard supports the following processor upgrades:

• Intel Core 2 Quad (Y) Q9xxxx
• Intel Core 2 Duo (W) E8xxx
• Intel Core 2 Quad (K) up to Q6600
• Core 2 Duo E6x00 (C) up to E6700
• Core 2 Duo E4x00 (C) up to E4400

The following Core 2 Quad processors are supported by your board: (each with a special BIOS version)

SL9UM Q6600 @ 2.4 GHz
SLACR Q6600 @ 2.4
SLACQ Q6700 @ 2.66
SLAWE Q9300 @ 2.5
SLAWR Q9450 @ 2.66
SLAWQ Q9550 @ 2.83

Your 8400 is not on the CPU supported models list.

No, this board is not compatible with the Q8300 chips. You can view a list of compatible ships at: http://www.foxconnsupport.com/cpusupportlist.aspx?type=mb&socket=Socket%20775&model=45CMX&cputype=Intel

go in the bios and set the speed for 2.4 ghz then click F10(save and exit) and you save the set speed should work .

set it to turbo
regards

personally i have the q6600 which is a quad core processor, all the others you listed were dual core, personally i use alot of programs all at once which is good if you have a quad core, but just for general music, data, and streaming, the e8400 is probably better for you, its a 3ghz processor.

Asus makethe majority of the board in the world. Intel makes most of the chips sets and CPUs, which you alread have.  Which model depends upon what features you want(What you are intending to do). Get the board with the most PCIe16 slots and tie them all together in addition to the one having the highest amount or Ram availableto run,and the fastest Front Side Buss speed. That should take care of you.  I had built one  with the Q6600 and used an MSI board with two 8800 video cards and 8GB RAM