Re: Dell Optiplex 745 Mini Tower Upgrade

Hi Asfand_Munib,

My opinion was based on the fact that the motherboard is LGA 775 and should support LGA 775 socket CPU's. However, as correctly mentioned by Kelbear1 and rdunnill, BIOS support is also necessary.

Let me research into this issue. I will keep you posted.

Thanks & Regards,
Sundeep B
#iworkfordell
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7 Plutonium

Re: Dell Optiplex 745 Mini Tower Upgrade

This is asked all the time.  Wolfdale's 45nm and Quads DO NOT and WILL NOT Ever Work.

The Specs say:

 WOLFDALE DUAL CORE PENTIUM Is NOT a Core 2 Duo.

http://www.dell.com/downloads/global/products/optix/en/opti_745techspecs.pdf

  Processor
Intel Core2 Duo Intel Pentium D Intel Pentium 4 Hyper-Threading logo Intel Celeron D logo
Intel®  Core™2 Duo®  Processor
Dual Core Technology
Intel® Pentium®  D Processor with
Dual Core Technology
Intel® Pentium®  4 Processor with
HT Technology
Intel® Celeron®  D Processor
Up to 6700
(2.66GHz,4MB,1066MHz FSB)
Up to 960 (3.6GHz,2X2MB,800MHz FSB)
Up to 531 (3GHz,1M,800MHz FSB)
Up to 346 (3.06GHz,256K,
  533MHz FSB)

Intel® Core™ 2 Duo 1066MHz FSB Socket T with XD, EM64T, 2MB and up to 4MB L2 cache, EIST and VT (6000 series)


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


Intel® Pentium® D 800MHz FSB Socket T with  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)


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Icwcrown
1 Nickel

RE: Dell Optiplex 745 Mini Tower Upgrade

I have a question 
first of all thnx for your all answers very helpful. 
i have a Dell optiplex 745 mini tower and i want to know
which method ram memory is better to use
1.DDR2 SDRAM  533 or 667 MHz: 8 GB
2.800 MHz: 4 GB 
3.Other
thankyou

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7 Plutonium

RE: Dell Optiplex 745 Mini Tower Upgrade

http://www.crucial.com/usa/en/compatible-upgrade-for/Dell/optiplex-745-series-%28desktop-mini-tower-...

 

CT2404444

  • DDR2 PC2-6400 • CL=5 • Unbuffered • NON-ECC • DDR2-800 • 1.8V • 256Meg x 64 •
  • upgrade for Dell OptiPlex 745

 

 533 aka PC2 4200 is TOO SLOW for ANY 745 with ANY processor.

667 aka PC2 5300 ram works with some but not all and must be 5 5 5 12 timing.

800 aka PC2 6400 ram works but must be low density and 1R or 2R

4R aka Quad Rank ram Does not ever work.  You cannot mix ranks.

Memory should be installed in the white ear slots then the black ones.  So not 1 2 3 4 but rather 1 then 3   then 2 then 4.

Max Dimm Size is 2 gigs aka 8 gigs total.

Not all units have 4 slots so you can get either 4 or 8 gigs of ram to work.

Must be Low Density,  Must NOT BE ECC, Must Not be Buffered, MUST NOT BE REGISTERED.

Ram labeled Fully buffered will not work.


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Icwcrown
1 Nickel

RE: Dell Optiplex 745 Mini Tower Upgrade

I'm confused with some answers! so to be more clear.

i can install in my minitower

max 4GB of ram 800MGz in each slot 4x1Gb or only in 2 slots with 2x2GB

i'm correct ?

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powerpodge
2 Iron

RE: Dell Optiplex 745 Mini Tower Upgrade

Hi,

The 745 tower/desktop/small form factor will take 4x  2GB DDR2 800MHz memory sticks for a maximum of 8GB.

The speed of the memory doesn't have any bearing on the maximum allowed.

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7 Plutonium

RE: Dell Optiplex 745 Mini Tower Upgrade

HOWEVER only Low Density NON ECC, NON REGISTERED,  SPECIFIC Models of Ram works.  This means that 8 gigs is possible if you have 4 ram slots. Single or Dual Rank 240 Pin UDIMM

YOU CANNOT USE Quad Rank Ram EVER.

You CANNOT MIX RANKS All Ram must be the same Rank

https://www.amazon.com/Corsair-PC2-6400-240-Pin-Channel-Desktop/dp/B0027P9C9G/

 

DDR2 PC2-6400 • CL=5 • Unbuffered • NON-ECC • DDR2-800 • 1.8V • 256Meg x 64 •  5-5-5-18

 

Dell OptiPlex 7XX Series

(Desktop Mini-Tower and Small Form Factor)


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