Short Answer NO you cannot.

The E5500 will not work in the 620.

Bios MUST BE UPDATED Before changing CPU.

Max CPU is the Dual Core Smithfield D820 or D840 CPU  Pentium D 

Intel Pentium D 840 HH80551PG0882MN

(BX80551PG3200FN / BX80551PG3200FT)

While the answer is correct: NO, as E series pentiums  from 2010 normally require a chipset newer than the 945 in the gx620.  I believe that your CPU list is incorrect.

Messages on this forum and others, and a quick review of the BIOS update readmes indicates that later P4D Presler cpus such as the 915, 920, 945, etc _DO_ work in a GX620.

However with no updated list from Dell, it is difficult to say exactly which models.  Can it support say, a 960 stepping D0? C1?   the HT 3.8Ghz  670's were a standard part, so I wouldn't be surprised if the clock could get to 3.6Ghz anyway.

FYI

Just upgraded my Optiplex GX620 CPU:

From a Pentium 4 521, 2.80GHz

To a Pentium D 945, 3.4GHz - refurbished for $40

The boot up Dell splashscreen also updated itself and now displays the Pentium D logo instead of the Pentium 4 logo

I have successfully upgraded my GX620 MT to a Core 2 Duo 6300. It runs quieter and cooler than the Pentium D 960 it replaced. It has updated Bios A11. I would think if it would run the 6300, it should run the 6600, possibly the Q6600 Kentfield....Remember that I am talking about the Core 2 Duos....not the Pentium Dual series.

Hello,

Can you report the actual front side bus and memory clock frequencies that you are seeing on your GX620?

And can you confirm that the motherboard in your GX620 is actually a GX620 motherboard and that, sometime in the past, maybe by someone else, the motherboard wasn't replaced with that from another Optiplex, like a 745?

Thanks

The Pentium D960 Definitely works with BIOS A11.  

HH80553PG1044M, SL9AP
HH80553PG1044M, SL9K7

There is an updated Copper heatpipe J9761heatsink that needs to be used with it.

Intel® Core™2 Duo Processor E6300 (2M Cache, 1.86 GHz, 1066 MHz FSB) ???

AKA Intel Core 2 Duo E6300 Conroe 1.86GHz LGA 775 65W ??

A11 Bios?  A11GX620.EXE

Or do you mean
Intel® Pentium® Processor E6300 (2M Cache, 2.80 GHz, 1066 MHz FSB)

Interesting

Retired and Discontinued

Intel® 82801GB I/O Controller Hub (ICH7), Pb-Free SLI

I was actually wondering this myself recently and I am about to find out soon enough if an Intel E5800 will work on the GX620

I am already doubting it having done further research into the matter.

The motherboard that the GX620 uses is a Dell 0F8098 with the 945G/GZ chipset with an I/O controller in the ICH7 family...

My research has shown me that the Intel E-5 series requires the ICH10 or ICH10R I/O Controller in most chipsets, and the 945G chipsets aren't even supported.

http://ark.intel.com/products/42802/Intel-Pentium-Processor-E5800-(2M-Cache-3_20-GHz-800-MHz-FSB)

This really is a bummer seeing as how I have just ordered an E5800 off ebay without knowing that until like 30 minutes ago...

There's a bright side to the story though, I dug in a little deeper and found out that the E-4 series of the Core 2 Duo's is actually compatible with our chipset.

http://ark.intel.com/products/34441/Intel-Core2-Duo-Processor-E4700-(2M-Cache-2_60-GHz-800-MHz-FSB)

Supporting Facts:

1. Core 2 Duo E4700 runs on the 800Mhz FSB like the motherboard requires

2. E4700 is an LGA775 socket CPU

So now I am hoping to buy an E4700 and see if it works on the GX620. Another option would be to replace the GX620 motherboard with one from an Optiplex 760. I found some on Ebay for about 60 dollars.

Hi, IamStryker !

Did you try to upgrade your GX620 with a E4700 ??

Bests,

Dell J9761 Dimension E520 OptiPlex 745 GX620 Heatsink & Shroud Manufacturer: Dell MPN: J9761

Optiplex 620 validated CPUs with 5 digit part number
DK050 Presler P4 Kit, 940, 3.2G, 2X2MB, 800FSB, C1
CJ163 Presler P4 Kit, 960, 3.6G, 2x2MB, 800FSB, B1
RT922 Presler P4 Kit, 945, 3.4, 2X2MB, 800FSB, C1
UJ776 Presler P4 Kit, 950, 3.4G, 2X2MB, 800FSB, C1
XJ848 Presler P4 Kit, 930, 3.0G, 2X2MB, 800FSB, C1
UY273 Presler P4 Kit, 915, 2.8G, 2X2MB, 800FSB, C1
DD517 Prescott P4 64bit Kit, 521, 2.8G, 800FSB, 1MB, Socket-T, E0
DD518 Prescott P4 64bit Kit, 531, 3.0G, 800FSB, 1MB, Socket-T, E0
DD519 Prescott P4 64bit Kit, 541, 3.2G, 800FSB, 1MB, Socket-T, E0
DD520 Prescott P4 64bit Kit, 571, 3.8G, 800FSB, 1MB, Socket-T, E0
FC071 Prescott P4 Kit, 670, 3.8G, 800FSB, 2MB, Socket-T, Performance
FK192 Prescott P4 Kit, 630, 3.0G, 800FSB, 2MB, R0
GD037 Prescott P4 64bit Kit, 551, 3.4G, 800FSB, 1MB, Socket-T, E0
GK159 Prescott P4 Kit, 670, 3.8G, 800FSB, 2MB, R0
GR271 Prescott P4 Kit, 640, 3.2G, 800FSB, 2MB, R0
GR272 Prescott P4 Kit, 650, 3.4G, 800FSB, 2MB, R0
GR273 Prescott P4 Kit, 660, 3.6G, 800FSB, 2MB, R0
HH261 Prescott Celeron Kit, 351, 3.2G, 533FSB, 256K, Socket-T, G1
JD245 Prescott P4 64bit Kit, 561, 3.6G, 800FSB, 1MB, Socket-T, E0
FD873 Prescott Celeron Kit, 326, 2.53G, 533FSB, 256K, Socket-T
FD874 Prescott Celeron Kit, 331, 2.66G, 533FSB, 256K, Socket-T
FD875 Prescott Celeron Kit, 336, 2.80G, 533FSB, 256K, Socket-T
DH715 Prescott Celeron Kit, 336, 2.80G, 533FSB, 256K, Socket-T, G1
DH716 Prescott Celeron Kit, 341, 2.93G, 533FSB, 256K, Socket-T, G1
FD876 Prescott Celeron Kit, 341, 2.93G, 533FSB, 256K, Socket-T
FD877 Prescott Celeron Kit, 346, 3.06G, 533FSB, 256K, Socket-T
DH717 Prescott Celeron Kit, 346, 3.06G, 533FSB, 256K, Socket-T, G1
RG427 Prescott P4 64bit Kit, 521, 2.8G, 800FSB, 1MB, Socket-T, G1
RG431 Prescott Celeron Kit, 331, 2.66G, 533FSB, 256K, Socket-T, G1
RP355 Prescott Celeron Kit, 331, 2.66G, 533FSB, 256K, ALT, G1
RP356 Prescott Celeron Kit, 336, 2.8G, 533FSB, 256K, ALT, G1
RP357 Prescott Celeron Kit, 341, 2.93G, 533FSB, 256K, ALT, G1
RP358 Prescott Celeron Kit, 346, 3.06G, 533FSB, 256K, ALT, G1
RP359 Prescott Celeron Kit, 351, 3.2G, 533FSB, 256K, ALT, G1
UT710 Prescott P4 Kit, 521, 2.8G, 800FSB, 1MB, ALT, G1
UT713 Prescott P4 Kit, 531, 3.0G, 800FSB, 1MB, ALT, G1
UT714 Prescott P4 Kit, 541, 3.2G, 800FSB, 1MB, ALT, G1
UY274 Prescott P4 Kit, 524, 3.06G, 1MB, 533FSB, G1
W9854 Prescott P4 Kit, 630, 3.0G, 800FSB, 2MB, Socket-T, (RoHS), Mainstream
W9855 Prescott P4 Kit, 640, 3.2G, 800FSB, 2MB, Socket-T, (RoHS), Mainstream
W9856 Prescott P4 Kit, 650, 3.4G, 800FSB, 2MB, Socket-T, (RoHS), Mainstream
W9857 Prescott P4 Kit, 660, 3.6G, 800FSB, 2MB, Socket-T, (RoHS), Performance
YG105 Prescott Celeron Kit, 326, 2.53G, 533FSB, 256K, Socket-T, G1
FG941 Smithfield P4 Kit, 820, 2.8G, 800FSB, 2MB, Socket-T, Mainstream, B0
FG942 Smithfield P4 Kit, 830, 3.0G, 800FSB, 2MB, Socket-T, B0
FG943 Smithfield P4 Kit, 840, 3.2G, 800FSB, 2MB, Socket-T, B0
KC794 Smithfield P4 Kit, 820, 2.8G, 800FSB, 2MB, Socket-T, Mainstream
KC795 Smithfield P4 Kit, 830, 3.0G, 800FSB, 2MB, Socket-T, Mainstream
KC796 Smithfield P4 Kit, 840, 3.2G, 800FSB, 2MB, Socket-T, Mainstream
UY272 Smithfield P4 Kit, 805, 2.66G, 2X1MB, 533FSB, B0

I have an GX 620 and the other PC whick has the same generation of chipset (i945). The fact is that  with i945 chipset on the other PC i own (famous MB producer), I could reach till E8500 Core 2 Duo max, and the E6800 for the Pentium Dual Core. In theory i945 can handle 1066FSB and (1333 by overclocking).It cannot in theory handle any quad core, and the quad support starts with i946 series.

The issue can be resolved by writing the BIOS (A12 maybe:):) that will open(unlock) all the possibilities of the 945 chipset.

tnx

Bios A12 does not exist.  There will be no further updates.  The 620 is end of life.

http://www.dell.com/support/drivers/us/en/19/DriverDetails/DriverFileFormats?DriverId=R142230


Release Date:     12/5/2006
Version:     A11
Importance:     Optional
Download Type:     BIOS
File Format:     Windows/DOS
File Size:     524KB

http://downloads.dell.com/bios/A11GX620.EXE

I have successfully upgraded my GX620 MT to a Core 2 Duo 6300. It runs quieter and cooler than the Pentium D 960 it replaced. It has updated Bios A11. I would think if it would run the 6300, it should run the 6600, possibly the Q6600 Kentfield....Remember that I am talking about the Core 2 Duos....not the Pentium Dual series.

I read this thread carefully... but unfortunately not carefully enough!

You are tho only person that claims to have installed a 6300 CPU into a GX620. On the strength of your assertion and the knowledgeable tone of your post I bought an  "INTEL CORE 2 DUO 6300 SL9TA 1.86GHz/2M/1066 CPU SOCKET LGA775" for £18 from ebay.....

And found it wouldn't work.

On re reading the thread it appears you must be wrong or doing something different, like a different processor, or motherboard or BIOS. Opinion seems clear that the A11 Bios from Dell is the latest, and no further updates will be provided. Is there ANOTHER SOURCE FOR A BIOS eg for the chipset, and HAS ANYONE GOT IT WORKING?

I may be able to return the 6300 CPU, and its only a small loss, but the delay and failed expectations are a let down!

I'm probably going to try for a "Pentium D 945 3.4G/4M/800 CPU / PROCESSOR LGA775" as the D960 is not available from the UK on ebay.. Both these have more support on the forums.

If you did use the 6300 chip in the GX620, please explain how. (Motherboard, BIOS etc...)

The CHIPSET and BIOS Microcode for A11 on the GX620 DOES NOT SUPPORT Core2 duo.

Pentium D 960 is max with the copper heatpipe heatsink.

You cannot use an E5500.