Dell Optiplex 745 CPU Upgrade

I don't believe so,as the Xenon is LGA 771 and the one you have is LGA 775.

Northwain,

Checking benchmarks baselines on Passmark Perforamnce Test, it appears the highest rated Optiplex 745; use >

1: Core2 Extreme Q6800 @2.93GHz (4-core)
2: Core2 Quad Q6700 at 2.66 Ghz
3 through 15: Quad Q6600 at 2.4 Ghz
16: Core2 Duo E8400 at 3.0GHz (2-core)

> so, the Optiplex 745 is using LGA775 CPU's of 1066 FSB with 65nm lithography.

Of course, the faster, higher core count is attractive, but If you are not using multithreaded applications, the Core2 Duo E8400 at 3.0GHz is a good choice- slightly higher clock speed and less expensive than the quad cores. The Core2 Extreme Q6800 start at about $90 while the E8400 start at $25 (10.14).

When changing the CPU, it's perfect time to upgraded the BIOS. Go to dell.com > support > downloads > BIOS

It appears that these CPUs are getting good results are in combination with:

Radeon HD 6450, 5570, 3450 5670
GeForce 630, 210

> It's well to keep the good performing cards that can be used in mind as the Optiplex 745 has limitations on graphics card size and the power use.

I recently upgraded a Dell Precision 390 which also uses LGA775, changing the 2-core 1.86 to a Xeon x3230 quad core at 2.67 and the CPU score went from 613 to 3642- good results for $45!

I like getting the old crocks to run well.

Cheers,

BambiBoom

HP z420 (2014) > Xeon E5-1620 quad core @ 3.6 / 3.8GHz > 24GB DDR3 ECC 1600 RAM > Quadro 4000 (2GB)> Samsung 840 SSD 250GB /Western Digital Black WD1003FZEX 1TB> M-Audio 192 sound card > AE3000 USB WiFi > HP 2711X, 27" 1920 X 1080 > Windows 7 Ultimate 64 >[Passmark system rating = 3923, CPU= 9223/ 2D= 839 / 3D=2048]

Dell Precision T5400 (2008) > 2X Xeon X5460 quad core @3.16GHz > 16GB DDR2 ECC 667> Quadro FX 4800 (1.5GB) > WD RE4 500GB / Seagate Barracuda 500GB > M-Audio 2496 Sound Card / Linksys 600N WiFi > Windows 7 Ultimate 64-bit > [Passmark system rating = 1859, CPU = 8528 / 2D= 512 / 3D=1097]

Dell Precision 390 (2005) Xeon x3230 quad core @ 2.67GHz > 6 GB DDR2 ECC 667 > Firepro V4900 (1GB)> 2X WD 320GB > Windows 7 Profession 64-bit [Passmark system rating = 1431, CPU = 3642 / 2D= 433 / 3D=1346]

2D, 3D CAD, Image Processing, Rendering, Text > Architecture, industrial design, graphic design, written projects

Hello, you have managed to upgrade the processor Xeon e5430

Reginant,

The Xeon E5430 2.66GHz processor does not work in the Optiplex 745. The E5430 uses DDR3-1066 or 1333 RAM and the Optiplex 745 uses DDR2 which is maximum of 800Mhz.

The fastest processors for the Optiplex 745 are:

1. Core2 Extreme Q6800 @2.93GHz (4-core)
2. Core2 Quad Q6700 at 2.66 Ghz
3 to15: Quad Q6600 at 2.4 Ghz
16. Core2 Duo E8400 at 3.0GHz (2-core)

Cheers,

BambiBoom

I am trying to get the e8400 running on my optiplex 745 sff but does not post. Will this CPU work?