Max CPU in my 755 MT is a C2Q Q9650. It was suggested to me by Rockstar(s). It's not stated what CPU you already have.
I think Speedstep was one to point out yes to the Q9650, but no to the QX9650. Apparently the QX must pop up in searches.
When I maxed the RAM to 8GB and put Win10 on an SSD, that gave me the most notable difference in performance. Before, even my USB's lagged. I added USB 3.0, but I wasn't getting the expected performance before the two aforementioned upgrades. Now, boot time is 17 sec., programs launch instantly, it runs recording studio software seemlessly, and so on. The Q9650 I bought for $41 off of eBay and it came in brand new condition.
Before those other upgrades, I added a GPU card (512MB), and noticed no changes even though that helps free up some RAM. I can't say it would be the same for the GT 1030 though.
So if you want to do upgrades on your 755, there you go. SSD's really do breathe new life into older machines.
Speedstep also had the recommendation of a newer PC, like a 9020 for example. The 755 is limited to SATAII (3gb/s) while the 9020 has SATAIII (6gb/s).
While the 755 can run fast... I bought a seller refurbished 790 DT off of eBay to run the Win7 32-bit HDD the 755 used to have. I have software that doesn't work with 64-bit, yet has features I was missing. Anyway, the 790 has SATAIII, an I3-2100 CPU, and runs absolutely slick even though boot time is almost a minute. It also has 4GB RAM, and Win 32-bit is limited to 4GB anyway. The 790 is from 2011. It doesn't have USB 3.0.
RobGoss
5 Posts
0
October 18th, 2019 08:00
I figured boosting the CPU would give this 755 a bit more power I already have enough Ram but the machine process's things slower then I would like
Thanks for the links
speedstep
9 Legend
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47K Posts
0
October 18th, 2019 08:00
755 is LGA 775 SOCKET i3-2120 is LGA 1155 socket
so this is NOT EVER WORKING.
Max cpu for 755 TOWER is core 2 QUAD Q6700
https://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf
https://www.amazon.com/Intel-Core-Q6700-Quad-core-Processor/dp/B00TUVNZMU
Not sure why you think changing CPU will help.
Better investment for all models EXCEPT USFF is GT1030 video card.
https://www.dell.com/en-us/work/shop/msi-gt-1030-2g-lp-oc-graphic-card-2-gb-gddr5-pcie-30-x16-low-profile-hdmi-displayport/apd/aa362018/graphic-video-cards
https://www.dell.com/en-us/work/shop/pny-geforce-gt-1030-graphics-card-2-gb-gddr5-low-profile/apd/a9763687/graphic-video-cards
speedstep
9 Legend
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47K Posts
0
October 18th, 2019 09:00
GT1030 is current and can be moved to newer faster unit without issue.
Rather than put money into a 755 look for a 9020 Tower.
https://www.amazon.com/Dell-Optiplex-Desktop-i5-4570-3-2-Windows/dp/B07SQBBMVK/
This will allow you to upgrade Ram to 32 Gigs and have Core I7 4TH gen.
The cost of windows 10 pro licence is $200.
bradthetechnut
7 Technologist
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9.4K Posts
0
October 18th, 2019 18:00
Also: https://www.dell.com/community/Optiplex-Desktops/755-MT-CPU-upgrade-to-Q9650/m-p/6189359
https://www.dell.com/community/Desktops-General-Read-Only/Optiplex-755-Processor-Upgrade/td-p/3845249
Walmart.com and ebay also sell mfr. refurbished Dell's for typically less than Amazon.
bradthetechnut
7 Technologist
•
9.4K Posts
0
October 18th, 2019 18:00
Max CPU in my 755 MT is a C2Q Q9650. It was suggested to me by Rockstar(s). It's not stated what CPU you already have.
I think Speedstep was one to point out yes to the Q9650, but no to the QX9650. Apparently the QX must pop up in searches.
When I maxed the RAM to 8GB and put Win10 on an SSD, that gave me the most notable difference in performance. Before, even my USB's lagged. I added USB 3.0, but I wasn't getting the expected performance before the two aforementioned upgrades. Now, boot time is 17 sec., programs launch instantly, it runs recording studio software seemlessly, and so on. The Q9650 I bought for $41 off of eBay and it came in brand new condition.
Before those other upgrades, I added a GPU card (512MB), and noticed no changes even though that helps free up some RAM. I can't say it would be the same for the GT 1030 though.
So if you want to do upgrades on your 755, there you go. SSD's really do breathe new life into older machines.
Speedstep also had the recommendation of a newer PC, like a 9020 for example. The 755 is limited to SATAII (3gb/s) while the 9020 has SATAIII (6gb/s).
While the 755 can run fast... I bought a seller refurbished 790 DT off of eBay to run the Win7 32-bit HDD the 755 used to have. I have software that doesn't work with 64-bit, yet has features I was missing. Anyway, the 790 has SATAIII, an I3-2100 CPU, and runs absolutely slick even though boot time is almost a minute. It also has 4GB RAM, and Win 32-bit is limited to 4GB anyway. The 790 is from 2011. It doesn't have USB 3.0.
bradthetechnut
7 Technologist
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9.4K Posts
0
October 18th, 2019 22:00
What size is your Optiplex - MT, DT, SFF, or USFF? That can make a difference in recommendations.
Optiplex 755 Tech Guide
Jon tolbert
10 Posts
0
October 19th, 2019 11:00
Do not buy a 1030. They are garbage. Get you a 1050ti or a 1650.
H TECH
1 Message
0
June 26th, 2022 04:00
I have prozessor Intel Core 2 Quad Q9300 inside with 8GB RAM.in DELL OPTIPLEX 755.
Its a desktop pc. But not able to use Windows 11, though i had slower computer....
so can i upgrade my hardware (Prozessor)?
bradthetechnut
7 Technologist
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9.4K Posts
0
June 26th, 2022 10:00
Hi @H TECH,
Did you review the threads I linked above in a post above the image of Optiplex's?
Also, going from C2Q to C2Q won't make a noticeable difference. That doesn't mean you can't max it out if you like.
https://cpu.userbenchmark.com/Compare/Intel-Core2-Quad-Q9650-vs-Intel-Core2-Quad-Q9300/m1706vsm832
https://www.game-debate.com/cpu/index.php?pid=22&pid2=18&compare=Intel%20Core%202%20Quad%20Q9300%202.5GHz-vs-Intel%20Core%202%20Quad%20Q9650%203.0GHz
https://www.userbenchmark.com/System/Dell-OptiPlex-755/3939
speedstep
9 Legend
•
47K Posts
0
June 27th, 2022 00:00
@H TECH
Windows 11 works on a 755 but its not supported.
Get a USB 2.0 32 gig flash drive
SanDisk-32GB-Cruzer-Flash-Drive B07MPCJDXS
Download windows 11 ISO
https://www.microsoft.com/en-us/software-download/windows11
Download rufus
Make Extended Installer on the sandisk FIT drive
Install 10 latest version
Then run setup from the usb flash OFFLINE aka any wifi or network cables disconnected and it will upgrade your system.
There are no 10 or 11 drivers but the Vista Drivers for 755 work fine with WIN 7 8 10 11. not supported does not mean not working
https://www.userbenchmark.com/UserRun/34787982