Optiplex 745 3.2 P4 cpu

The E5400 is a 45nm CPU. You are limited to the 65nm CPUs such as E4500, E6600, Q6600. The E5400 CAN'T work on that system.

I've put a Q6600 in a spare Optiplex 745 I have and it works great. Good upgrade if you can get one.

I'm confused. Show you what? That a Q6600 works in a Optiplex 745? Unfortunately my parents in-law have the computer now but I assure you that it does work. It's a 65nm CPU which the Optiplex 745 motherboard supports.

Well, I apologize since I don't have the computer anymore but here's a thread from Dell about a person who did the same thing:
http://en.community.dell.com/support-forums/desktop/f/3...

And another thread:
http://forums.pcper.com/showthread.php?t=463905

And another:
http://en.community.dell.com/what-do-i-buy/f/3510/t/186...

Are you saying it won't work? It was a G0 stepping if that matters and I believe BIOS version 2.4.1 which I think is not the latest.

What was all that about "realize the truth"? It's cool  

Thanks.
Ahh, ok. That makes sense. I think I do remember reading about one of the BIOS updates (2.3.1?) expanding support for more CPUs. Thanks.

Really? That's interesting. Please share!

From what I can tell, that Dell uses the old Q965 chipset (see: http://www.dell.com/downloads/global/products/optix/en/... ). AFAIK, that chip set do not support 45nm CPUs.

See: http://www.intel.com/products/desktop/chipsets/q965-q96...
Notice that the FSB supported is maxed out at 1066. Which would mean that 45nm CPUs are probably not supported.
And : http://bit.ly/cipUic
And finally, the CPU support page do not list any 45nm CPU as being supported (look under COMPATIBLE PRODUCTS > Compatible CPUs): http://ark.intel.com/chipset.aspx?familyID=22756
It also do not list C2Q support, even the 65nm varient. So you may not be able to run a c2Q on this chipset.


Unless you can show me a CPUZ validated link, I'm gonna say that 45nm CPUs won't work on that board/chipset. 65nm C2Qs may or may not work.

OK, updated the bios yesterday, with 2.6.4 - 3/16/2010, I think it had 2.4.x from 6/2006. I installed the e6700, no dice. I pulled the batttery, no dice. So I guess I could buy a Q6600 on ebay but, errrr to risky.
Thanks for all the input, you have all bee very helpful.

On another note would flashing the bios to a dell with the 65nm work?
I won't do that to this one, my boss would not be happy if it died.

I meant "On another note would flashing the bios to a dell with the 45nm work?"

Looks like Dell uses some locked BIOS to limit CPU models. Sorry, looks like you are SOL. A Q6600 WILL NOT work with that chipset. (See my above post).

The E6700 should have worked, but by the looks of it, either the CPU is dead or Dell has a locked BIOS that limits it to certain CPU models.

Yes indeed some branded will locked the BIOS that limits upgrading not just the CPU.

Well the e6700 works on a newer MOBO, so I know it's good. Is there anyway to unlock the bios?
Or use one for a similar machine?

^ Probably not. You can contact Dell and see what they say.

I'm running this system with Core2 Quad Q6600 G0 (SLACR) with BIOS version 2.4.1 and 2.6.2 for four years.

Processors Information

------------------------------------------------------------------------------------

 
Processor 1 (ID = 0)

Number of cores         4

Number of threads       4 (max 4)

Name                    Intel Core 2 Extreme Q6600

Codename                Kentsfield

Specification           Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz

Package

CPUID                   6.F.B

Extended CPUID          6.F

Core Stepping           G0

Technology              65 nm

Core Speed              2392.3 MHz

Stock frequency         2400 MHz

Instructions sets       MMX, SSE, SSE2, SSE3, SSSE3, EM64T

L1 Data cache           4 x 32 KBytes, 8-way set associative, 64-byte line size

L1 Instruction cache    4 x 32 KBytes, 8-way set associative, 64-byte line size

L2 cache                2 x 4096 KBytes, 16-way set associative, 64-byte line size

FID/VID Control         yes

Features                XD, VT

DMI

------------------------------------------------------------------------------

 
DMI BIOS

--------

        vendor          Dell Inc.

        version         2.6.2

        date            08/12/2008

 
 
DMI System Information

----------------------

        manufacturer    Dell Inc.

        product         OptiPlex 745

        version         unknown

        serial          xxxxxxxx

        UUID            xxxxxxxx