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Dell Optiplex 755 desktop - What is the Maximum amount of memory I can install?

I have a Dell OptiPlex 755 with 2 Gig RAM.  What is the maximum I can install?  I can't seem to find this information on the darned Dell website!!! Here's what I know about my pc:
223-0731 : OptiPlex 755 Desktop Energy Smart,Core 2 Duo E6550/2.33GHz 4M,VT,1333FSB
330-1129 : Shipping Material for System Single Hard Drive Neo Desktop Dell OptiPlex
365-0257 : CFI Routing SKU
366-1551 : Custom Project Fee for ESLH
313-5426 : 16X DVD+/-RW,SATA,Dell OptiPlex 755 Desktop or Minitower
310-9498 : vPro Secure Advanced Hardware Enabled Systems Management Dell OptiPlex
420-6972 : Windows XP PRO SP2 with Windows Vista Business License Dell OptiPlex,English,Factory Install

366-1040 : Custom Asset Report
310-9627 : Dell USB 2 Button Optical Mouse with Scroll,Black OptiPlex
374-5789 : CFI,B3RB,Display,Flat Panel Display,19,1908T,Black,19 Inch,VIS,Factory Install
420-7963 : Roxio Creator Dell Edidion,9.0 Dell OptiPlex
374-0812 : CFI,Information,OPTI 755 ONLY, Factory Install
310-8010 : Dell USB Keyboard,No Hot Keys English,Black,OptiPlex
341-5472 : 80GB SATA 3.0Gb/s and 8MB Data Burst Cache,Dell OptiPlex 755

311-7440 : 2GB,Non-ECC,667MHz DDR2,2X1GB OptiPlex 740
Part Number  




DUAL IN-LINE MEMORY MODULE, 1G, 667M, 128X64, 8, 240, 1RX8
366-1416 : Image Load
366-1556 : Custom BIOS Setting Fee
420-9179 : Cyberlink Power DVD 8.1,with Media,Dell OptiPlex/Precision
310-9490 : You have chosen a vPro System
341-4072 : No Floppy Drive with Optical Enhanced Filler Panel,Dell OptiPlex Desktop
310-9161 : Vista Premium Downgrade Relationship Desktop
313-3351 : Internal Chassis Speaker Option,Dell OptiPlex Desktop
5 Solutions
Muhammad MullaCommented:
8GB is the max supported memory on those as far as I remember.
Muhammad MullaCommented:
Lee W, MVPTechnology and Business Process AdvisorCommented:
8 GB using 4x 2GB DDR2 Modules.  www.crucial.com has a tool that will help ensure you get the correct RAM and tell you the maximum supported.  Or if you don't want to get the RAM from them, print it out and take it to a local store.
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You can go to www.crucial.com and use their memory selector. It will tell you max and # of slots, etc.
Mine is running with 8GB.
brothertruffle880Author Commented:
Thanks to all!!!!
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