Optiplex 780 SFF (Looking for CPU Upgrade)

[marcusmulvena11]

Hey I have a Optiplex 780 sff and I’m currently looking for a new cpu, which would be the best fitting one?

Specs:
CPU: Core 2 Duo E8500 3.16Ghz
GPU: 1050Ti Low profile Ik it’s bottle necking the cpu
Ram: 8Gbs of ddr3
PSU: optiplex sff factory power supply

And I’m also wondering would I need to change out the cooler for the cpu if I went for a Quad Core? If you have any ideas let me know!

 

[drtweak]

The Q9650 was the highest CPU you could get for that motherboard.

Intel® Core™ 2 Quad Q9650/3.00GHz, 12M, 1333FSB
Intel® Core™ 2 Quad Q9550/2.83GHz, 12M, 1333FSB
Intel® Core™ 2 Quad Q9400/2.66GHz, 6M, 1333FSB
Intel® Core™ 2 Quad Q8400/2.66GHz, 4M, 1333FSB
Intel® Core™ 2 Quad Q8300/2.50GHz, 4M, 1333FSB
Intel® Core™ 2 Duo E8600/3.33GHz, 6M, 1333FSB
Intel® Core™ 2 Duo E8500/3.16GHz, 6M, 1333FSB
Intel® Core™ 2 Duo E8400/3.0GHz, 6M, 1333FSB
Intel® Core™ 2 Duo E7600/3.06GHz, 3M, 1066FSB
Intel® Core™ 2 Duo E7500/2.93GHz, 3M, 1066FSB

 

[drtweak]

Just Note that if it is a USFF It can't do any of the Quad Cores

 

[clutchc]

This is the Technical Guide Book for the Optiplex 780 MT, DT, SFF, and USFF PCs. Scroll down to the CPU section to find out what CPUs are supported for your machine. Keep in mind that your small 235W PSU is already overloaded with the GTX 1050 Ti. With the higher wattage Quad Core, it and the GTX 1050 Ti will use more watts. Run at your own risk.

 

[marcusmulvena11]

The Q9650 was the highest CPU you could get for that motherboard.

Intel® Core™ 2 Quad Q9650/3.00GHz, 12M, 1333FSB
Intel® Core™ 2 Quad Q9550/2.83GHz, 12M, 1333FSB
Intel® Core™ 2 Quad Q9400/2.66GHz, 6M, 1333FSB
Intel® Core™ 2 Quad Q8400/2.66GHz, 4M, 1333FSB
Intel® Core™ 2 Quad Q8300/2.50GHz, 4M, 1333FSB
Intel® Core™ 2 Duo E8600/3.33GHz, 6M, 1333FSB
Intel® Core™ 2 Duo E8500/3.16GHz, 6M, 1333FSB
Intel® Core™ 2 Duo E8400/3.0GHz, 6M, 1333FSB
Intel® Core™ 2 Duo E7600/3.06GHz, 3M, 1066FSB
Intel® Core™ 2 Duo E7500/2.93GHz, 3M, 1066FSB

Hey thanks for letting me know, ill try going for the Q9550 as its the only one i can find atm

 

[william p]

Here are some builds of that system. You can see the relative performance of each CPU.
https://www.userbenchmark.com/System/Dell-OptiPlex-780/3883
JP911 is the heatpipe cooler for the SFF to replace the aluminum block.
https://www.ebay.com/p/Dell-Optiplex-745-SSF-755-SFF-Heatsink-JP911-0jp911/1904467821
The Optiplex has a95W CPU limit, and the GTx1050Ti is 75W so 160W and not much else in there. I would try to get 12-16GB RAM also. 8GB is cutting it close with a 4GB GPU.

 

[marcusmulvena11]

This is the Technical Guide Book for the Optiplex 780 MT, DT, SFF, and USFF PCs. Scroll down to the CPU section to find out what CPUs are supported for your machine. Keep in mind that your small 235W PSU is already overloaded with the GTX 1050 Ti. With the higher wattage Quad Core, it and the GTX 1050 Ti will use more watts. Run at your own risk.

Do you think i should invest into a more powerful psu? and would i have any problems with bios? And one more thing, would i be able to pull off the stock cpu cooler for the quad core?

 

[marcusmulvena11]

Here are some builds of that system. You can see the relative performance of each CPU.
https://www.userbenchmark.com/System/Dell-OptiPlex-780/3883
JP911 is the heatpipe cooler for the SFF to replace the aluminum block.
https://www.ebay.com/p/Dell-Optiplex-745-SSF-755-SFF-Heatsink-JP911-0jp911/1904467821

Hey I remember when you posted a solution on my other post "Will a Zotac gtx 1050ti fit"
Thanks for the reply! and i was wondering if i would have to change the cooler?

 

[william p]

An updated BIOS is easy on a Dell. Download from Dell support, open the file, and it will install itself in Windows.
I was editing some stuff in when you replied, there's a little more in my previous post.

 

[marcusmulvena11]

Just Note that if it is a USFF It can't do any of the Quad Cores

An updated BIOS is easy on a Dell. Download from Dell support, open the file, and it will install itself in Windows.
I was editing some stuff in when you replied, there's a little more in my previous post.

Alright so i shouldn't worry about bios giving me a hard time, just a question. Do i download to bios before i put in the new cpu or after? and ill try going for 16gbs of ram

 

[clutchc]

This is the Technical Guide Book for the Optiplex 780 MT, DT, SFF, and USFF PCs. Scroll down to the CPU section to find out what CPUs are supported for your machine. Keep in mind that your small 235W PSU is already overloaded with the GTX 1050 Ti. With the higher wattage Quad Core, it and the GTX 1050 Ti will use more watts. Run at your own risk.

Do you think i should invest into a more powerful psu? and would i have any problems with bios? And one more thing, would i be able to pull off the stock cpu cooler for the quad core?

Yes, but you won't find one. I had the same trouble with my first Optiplex SFF years ago. It had the slightly larger 240W PSU, but had the same 17A +12v rail as yours. It handled my GTX 1050 Ti and 95W i5-2400 fine, so I left it like that. Dell's PSUs are pretty good, and I suspect under-rated.

 

[william p]

Do the BIOS first. that way if the CPU needs an update it will already be there.
Clutch is right you don't need a new PSU. But just in case it blows up there is a275W from back in the PentiumD days.
The Opti 745,XPS210, Dimension 9200c SFF PSU.
https://www.ebay.com/p/Dell-Optiplex-SFF-745-XPS-210-275w-Power-Supply-N275p-01/1339741242?iid=192168302348&chn=ps
But like Clutch says it has the same 12V. 17A. rail. So this may give you some idea what yours is actually capable of.

 

[marcusmulvena11]

An updated BIOS is easy on a Dell. Download from Dell support, open the file, and it will install itself in Windows.
I was editing some stuff in when you replied, there's a little more in my previous post.

Hey, i was wondering what i need to download for the bios to be updated. https://downloadcenter.intel.com/product/33924/Intel-Core-2-Quad-Processor-Q9550-12M-Cache-2-83-GHz-1333-MHz-FSB- i found this site, but not sure what to download

 

[drtweak]

An updated BIOS is easy on a Dell. Download from Dell support, open the file, and it will install itself in Windows.
I was editing some stuff in when you replied, there's a little more in my previous post.

Hey, i was wondering what i need to download for the bios to be updated. https://downloadcenter.intel.com/product/33924/Intel-Core-2-Quad-Processor-Q9550-12M-Cache-2-83-GHz-1333-MHz-FSB- i found this site, but not sure what to download

You need to go to go here

https://www.dell.com/support/home/us/en/04?c=us&l=en&~ck=mn

then type in the service tag on the PC (Should be on the top or back) and then click on Downloads and Drivers on the left. In there you will find the bios (There are 4 drop down boxes at top. I think the left bottom you can select BIOS and then it will list the BIOS for that PC) then just run the installer as administrator and it will update.