sandlingallday :
Mine is the small form factor.
SFF, still OK.
sandlingallday :
Please remember this is NOT my forte... I can look stuff up and follow some conversation, but my brain is NOT wired to understand stuff like this.
Heck, I ONLY run one ninja on fortnite because I can't follow the perks and abilities!!
That is OK as well, I can guide you trough installation.
Do you still need keyboard and mouse? Do you have anything or nothing at all?
We need to know more about your Optiplex.
If you don't have keyboard and mouse, please PM me your Optiplex Service Tag number, it is not for Public eyes to be posted in open forum, so I can extract your system info.
If you have keyboard and mouse already (might come with Optiplex)
Lets go simple route.
Install CPUZ
https://www.cpuid.com/downloads/cpu-z/cpu-z_1.86-en.exe
Get Imgur picture hosting
https://imgur.com/register .
Run CPUZ. We need processor model from MAIN CPUZ TAB, next open Memory TAB, use keyboard and press Print Screen button.
Next go to Accessories and open Paint, use Crop function and cut exactly CPUZ picture, next step is to open new Paint window, when asked what to do with first file, don't save, now Paste what you cropped and save and save it on your desktop. Next upload picture to Imgur. It is easy once you do it a few times, make browser window half size and drag with mouse your picture into Imgur upload Zone, you done with uploading. Next left mouse click on Imgur picture, next right click (mouse) on the picture and select View picture, copy address info ending with .JPG
here into you post.
Do the same with SPD TAB from CPUZ.
All this will give us information about your Memory Type, exact model installed, amount, etc
If you know this already, please just post it here.
Upgrading power supply (PSU) in SFF is huge headache, so we will try to avoid it. This is short specs list
https://www.dell.com/downloads/global/products/optix/en/dell_optiplex_9010_spec_sheet.pdf
This manual is needed to guide you through hardware installation process
https://downloads.dell.com/manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-9010_owner's%20manual3_en-us.pdf
This is extra information
https://downloads.dell.com/manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-9010_user's%20guide_en-us.pdf not needed now.
Coming back to your PC.
This is your motherboard
Side Panel open small
Side Panel open large
Based on those pictures you can install low profile dual bracket video card (GPU).
If you don't need keyboard and mouse.
The best in your budget ZOTAC GeForce GTX 1050 Low Profile 2GB GDDR5 128-bit Gaming Graphics Card ZT-P10500E-10L
Amazon
https://www.amazon.com/ZOTAC-GeForce-Profile-Graphics-ZT-P10500E-10L/dp/B06XHJX4G8/ref=sr_1_7?s=pc&ie=UTF8&qid=1535740158&sr=1-7&refinements=p_89%3AMSI|ZOTAC%2Cp_n_condition-type%3A2224371011%2Cp_n_feature_keywords_five_browse-bin%3A6147187011%2Cp_n_feature_keywords_two_browse-bin%3A6147184011
Newegg
https://www.newegg.com/Product/Product.aspx?Item=N82E16814500416&ignorebbr=1&cm_re=PPSSNICRZGAFDP-_-14-500-416-_-Product
I guarantee Zotac GTX 1050 fit and PSU compatibility
If you need to purchase keyboard and mouse, you can go with previously mentioned purchase offer, minus PSU.
Anything else I can help you with?