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Optiplex 755 Processor Upgrade
I'm looking to squeeze a couple more years out of the 755 I use at my office, and I have some upgrade questions. It is a mini tower configuration with a Q6600 processor. Is there a chart that shows what processors can be used with the 0GM819 mobo? Will motherboards from any other series fit the 755 chassis?
speedstep
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November 23rd, 2011 07:00
Chart.
No other motherboards do not fit nor do they work with the ribbon cable to the front panel.
After updating to the latest bios I would say up to 45nm Q9650 for the Mini Tower.
You would have to make sure that you get PC6400 DDR2 Ram if you do that.
UPDATE THE BIOS BEFORE trying to install a newer processor.
The Q9650 worked in my minitower bios A20.
speedstep
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November 23rd, 2011 08:00
The Crucial Kits are the exact ram I chose.
snackworm
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November 23rd, 2011 07:00
Okay, thanks!
As for the processor suggestion, is there a specific reason for the Q9550 as opposed to the Q9650 or one of the QX9xxx?
snackworm
41 Posts
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November 23rd, 2011 08:00
I had planned on upgrading to 8GB of PC8500 with 2 4Gb kits form Crucial.
www.crucial.com/.../mpartspecs.aspx
It is the tower configuration, and my BIOS is at A20 already.
Thanks Again!
speedstep
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November 23rd, 2011 08:00
Q9650 works but I don't know about the power in a SFF or SDT. Q9650 in SMT BIOS A20 = TOWER version does work YMMV.
In the USFF Forget it because It WILL NOT work due to the power brick being only 150W.
:emotion-3:
ALWAYS UPDATE BIOS BEFORE installing New Ram and New Processor or you will drive yourself crazy
trying to figure out which piece is broken.
PC6400 ram is required for the 1333mhz fsb CPU's
cejdasan
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March 6th, 2012 13:00
Why is DDR2 PC2-6400 RAM modules required with 1333 FSB C2D's?
Does it multifunction with DDR2 PC2-5300 RAM modules?
What is the best ram for C2D'S 1066 FSB?
speedstep
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March 7th, 2012 07:00
Required Ram is based on Front Side Bus.
If your Front Side Bus is 800mhz then you need PC2-6400. DDR2 PC2-3200/4200 is NOT Supported in ANY configuration.
They recommend DDR2-800 so that you will not have a CPU that has an issue with the FSB. Keep in Mind that the VIDEO clock
minimum speed is 333 mhz and that system ram is shared with INTEL Graphics.
Motherboard is capable of clocking memory not only as DDR2-533, DDR2-667 and DDR2-800 but also as DDR2-1066 at a FSB frequency of 266MHz.
4GB kit (2GBx2), 240-pin DIMM, DDR2 PC2-8500 memory module
(MHz)
(ns)
(MHz)
(MT/s)
(MB/s)
(CL-tRCD-tRP)
(ns)
DDR2-400C
4-4-4
20
DDR2-533C
4-4-4
15
DDR2-667D
5-5-5
15
DDR2-800D
DDR2-800E
5-5-5
6-6-6
12½
15
DDR2-1066F
7-7-7
13⅛
cejdasan
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March 8th, 2012 10:00
Uff, exhausting answer. Thank you very much for that. It makes perfect sense and I can report to my boss with confidence how to upgrade our PC's.:emotion-2:
ian Hu
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December 29th, 2015 08:00
Very descriptive & helpful
Thanks!
rednosedpits
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January 29th, 2016 15:00
I am looking for information also, I have a dell optiplex 755 desktop with a e6550 processor in it, I beleive it is listed as a q35 intel and would like to know if I could upgrade the processor also and if so what could I upgrade it too?
rednosedpits
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June 17th, 2016 20:00
I am not really totally understanding the codes listed below on the E6850 processor for the 755 DT of X-GSP can someone explain this to me and also I currently have bios version A22 installed would this be the latest bios version available for the optiplex model in question?
speedstep
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June 22nd, 2016 20:00
PROCESSOR
NOTE: Global Standard Products (GSP) are a subset of Dell’s relationship products that are managed for availability and synchronized
transitions on a worldwide basis. They ensure the same platform is available for purchase globally. This allows customers to
reduce the number of configurations managed on a worldwide basis, thereby reducing their costs. They also enable companies to
implement global IT standards by locking in specific product configurations worldwide. The following GSP processors identified below
will be made available to Dell customers.
NOTE: Processor numbers are not a measure of performance.
NOTE: Processor availability subject to change and may vary by region/country.