Over Clocking CPU

I have a OptiPlex 745 tower.  It has an Intel E4600 Core Duo running at 2.4ghz.  I know it voids my warranty But this is out of warranty.  I have seen that the E4600 can be clocked to 3.0+.  My BIOS does not allow me to make any CPU changes.  My BIOS is 2.6.4  date 03/01/10. Is there any way to overclock this cpu in this OptiPlex 745?  If so how do I do it?

ronabramson

No.

Bev.

Thanks Bev .

But since you are not a Dell employee I am still hooping a newer /older BIOS or trick  will allow me to overclock!

If someone else can help I would sure appreciate it.

I guess the other way is to use a faster processor. Is there

1. !s there a faster processor I can install? Maybe not one the book says  you can install but does install and indeed works and speeds up my computer? (using a different BIOS maybe?)

2. Do I have the latest OR BEST BIOS? My current BIOS is 2.6.4 date 03/01/10.

You run the bios update from within XP with NO ANTIVIRUS Software installed.

Antivirus programs will halt the update after it has erased the bios and brick the machine.

Otherwise you use an MSDOS startup disk and run the executeable.

I don't carry around a list of what cpu runs on what model.

Validated CPUs for the 745 have been asked and re re re re re re re re re re re re re asked 5,743 times.

Only the MINI Tower supports faster cpus due to power supply limitations and motherboard voltage regulator spec.

I believe that the Performance Copper Heatsink is the same for Dimension E520 E521 Optiplex GX620 755 745, 380, 755, 760, 780 MT.

The cheap Aluminum version is HR004, J7109, FW209, W5685, W6177

HEATSINK D9729     SHROUD J9761 is the High end Copper part.

No quads.  Request Denied.

The OptiPlex 745 features an Intel (Pentium 4HT, Celeron D, Pentium Dual Core, or Core 2 Duo) processor, up to 4GB memory, and is available in four chassis: Desktop (SDT), Mini-Tower (SMT), Small Form Factor (SFF), and Ultra Small Form Factor (USFF).

Optipex 745 Tech Specs

Intel® Core™ 2 Duo 1066MHz FSB Socket T with Dual Core technology XD, EM64T, 2MB and up to 4MB L2 cache, EIST and VT (E6000 series)

Intel® Pentium® D 800MHz FSB Socket T with Dual Core technology XD, EM64T, 2x2MB L2 cache, EIST, and VT on 950/960 (900 series)

Intel® Pentium® D 800MHz FSB Socket T with Dual Core technology XD, EM64T, 2x1MB L2 cache (800 series)

Intel® Pentium® 4 800MHz FSB Socket T with HT, XD, EM64T, and 1MB L2 cache (500 series)

Intel® Celeron® D 533 MHz FSB Socket T with XD and EM64T (300 series)

This would lead me to believe that these work fine.

Intel® Core™2 Duo Processor E6700 (4M Cache, 2.66 GHz, 1066 MHz FSB)
Intel® Core™2 Duo Processor E6600 (4M Cache, 2.40 GHz, 1066 MHz FSB)
Intel® Core™2 Duo Processor E6420 (4M Cache, 2.13 GHz, 1066 MHz FSB)
Intel® Core™2 Duo Processor E6400 (2M Cache, 2.13 GHz, 1066 MHz FSB)
Intel® Core™2 Duo Processor E6320(4M Cache, 1.86 GHz, 1066 MHz FSB)
Intel® Core™2 Duo Processor E6300 (2M Cache, 1.86 GHz, 1066 MHz FSB)

Chris M would have to say what processors were validated with the 745 since I'm only guessing.

Overclocking is NOT allowed on ANY of the Optiplex models.

XPS models with Liquid Cooling systems have this.

HEIDEN 2.6.6 is the latest bios.

http://downloads.dell.com/FOLDER00224415M/1/HEIDEN_2.6.6.exe

1.You say HEIDEN 2.6.6 is the latest bios.  I have downloaded it, how do I flash the BIOS, and is there any danger of making my pc a boat anchor by doing this?

2. Can I put in a faster cpu, and if so what can I install and any special tricks or tips to install a faster cpu than the E4600?

Uninstall Malwarebytes and Za Extreme Antivirus software before trying the bios update.  Doing anything otherwise runs the risk of bricking your machine.   You cannot do bios update from CD.  Must be DOS Diskette with no config.sys or other drivers.  USB floppy booting is fine. You have been warned.  In win7 you have to right click the bios file and RUN AS ADMINSTRATOR or you will get Flash Access Denied.   Antivirus software will let the bios erase then crash the system before the new version is written. This means your machine is DEAD FOREVER.

There are no guarantees of any particular "25%" speed increase. 

I am not Dell engineering and I do not have a list of valdiated cpu's

I do not believe that the E6750 or E6850 work because the FSB of 1333 Mhz is not available in the 745.

I am running Win 7 64 Bit.  I have Malwarebytes and ZA extreme security running.

1.You mentioned making a DOS startup disk. If I had the HEIDEN_2.6.6.exe file on it the startup CD would the BIOS flash and I would not have to remove the anti-virus software from the computer?

2.  Or can I EXIT the two virus/malware programs and open a command prompt,(as admin) or do I actually need to uninstall Malwarebytes and zonealarm extreme security?

3. My OptiPlex 745 is a mini-tower with an Intel(R) CORE(TM) 2 Duo CPU E4600 @2.4GHz 2.39 GHz processor.  You mentioned many, many CPUs, how do I know if there is a processor significantly (25% or more)  faster processor that I can install?

SORRY if my etiquette is bad, I hit did not answer as It was not the full answer.  I do not use forums and do not know what is right or wrong!

yeah i have this pc did allot of search and only core 2 with 1066 fsb work and with newest bios (which is old by now lol) it can take any core 2 quad as long as its 1066 fsb and 95 or lower tdp i have q6600 slacr g0 revision in this very pc and many on toms hardware say if this cpu works than there is no reason a q6700 wont and a few people confirmed having a q6700 in this pc

if it has the copper heatsink in it like mine does you can for sure put a q6600 slacr as it has tdp of 95 watts while the sl9um has tdp of 105 watts (this is above the tdp of any officially supported cpu on the dell website)  and any q6700 will also work as they all have the 95 watts tdp

i wont try this bios personally lol but as long as you have the newest bios for this pc the q6600 (slacr) and q6700 will work and this is fastest core 2 quad who works (2.66 ghz) also im pretty sure they may have a core 2 duo on the dell website as officially supported that is 3.0 ghz (at least 2.66 im sure)and is likely even cheaper than these quad cores on ebay

I understand I need ti UNINSTALL Malwarebytes and Zonealarm.

I know windows defender is available (I have run it) and I am not sure if MS Essentials is uninstalled completely.  I do not mean to be dense but do I need to make sure these programs are uninstalled as well?  Could you let me know how to correctly uninstall these as they do not show up in the uninstall section of control panel to uninstall.

i have the same bios as you and im using a quad core q6600 (slacr) for 2 years now in this pc you can also put a q6700 with this bios no real need to update and the bios we have also supports pcie x16 2.0 3.0 etc and up to 8 gb of ram so also no need to even update the bios 

only thing to do is buy a q6600 or q6700 processor this is best this pc can handle with out overheating the mother board (in theory a q6800 would work but it takes too much power for the motherboard to handle 130 vs the 95 it is rated for)

you can get a q6700 on ebay for around $35 now