Hi jsmith1235,

The tested GPU for the MT Optiplex 9020 are,

Processor:

Chipset:

We dont recommend other upgrades, which is not tested with the system due to compatabilty and failure issues.

the MT has loads of space

can run any card really,  99% pure. like Ivory Soap. (not counting say a $400 up card)

rule 1 no UEFI of anykind enable. ok?  I test with none. and all are 64bit, w10 tests.

I have many dells here and all can run any card;,  100s tried. have them back to 2004 era, and all run.

if it  fits and does not hit , and does not overload the PSU or the other PCs dell made with lame 25 watt motherboards (not done on MT, your choice is best MT)

then that is all that matters. (99%) yes some rare cards fail in dells. (BIOS wars)

upgrade bios if you see any issues.

Im telling what does work not what dell tested (the shortest list on earth ) NO DELL QVL lists exists (real)

if you are savvy you'd use bench mark web sites and click 9020 and see all cards on earth , used on this PC.

9000 ujsers there ever heard of passmark, and there lists?  yah.(real PC real ownes look)!

if a gamer and serious ( they do DIY home built) but with 9020 , no gamer uses UEFI, all it does is make

GPU upgrades a HUGE PITA,  turn off the UEFI and run vast choices of GPU cards,  seen in the link above.

Never ask DELL?, they are a hammer, and all they see are nails (  the no word endless)

i have 3020, and run 700watt PSU in mine, and 790 and older and they too all run a GTX1050 or 200watt card old. everyone does. even the worse power hog, gpu card in my kits. 250watt cards too, so works.

your 9020 ,7020 and my 3020 needs  $7 PSU cable adapter to upgrade to more more power above dell sells..

here is my personal list of tied, cards, GTX1650 soon. (I highly recommend this card) Turing Class chip set ! and die.

• Brand new GTX1050  (Zotac brand 2018) 100% and only needs 75watts max to run (way less with windows idle but is 20watts idle whole PC)
• R5-240 Radeon (November 1, 2013),
  
• GTX260 (2008mfg) double wide power hog,card= 200watts, works perfectly BIOS and DVD-D mode (but needs both AUX power cables or it will not run ! with just one AUX power cable.)"amazing this works !)
• GTX650 works perfectly; (2012mfg) 110-134 watts. (with aux connector) runs perfectly.
• GTX550 same.
• A lot of 10 random old cards year era 2007 Geforce 8400 GS ,   (all flea power) all function flawlessly and slow as should be. 5FPS in 3D test, slow.  even Runs in DUAL monitor mode, all by it self.
• ATI R9-380 a 190watt card ! Runs perfectly and FurMark at 67FPS, at 61ºC and really gets hot. on cooling tubes and on back of card.  Idle temp.'s = 33C @5watts. (GPU-Z info)
• (I don't own any GPU cards at  300-365watt demand  nor ever will) (worst ever was one RADEON)
• I do not have a Turing Class RTX-20xx card to test , and am told the MSI version of come cards fail here.(UEFI VBIOS dead dell bugs)  (I have  GTX1650 to test soon, it is TURING class, as is series 20. soon. many dells here.

if running cards (not all do this) that have bad video bios, like some RTX have by MSI, then don't buy MSI.

buy Asus or Gigibyte there are 10 top makes, most work. 

ive no ideal what you need a GPU for.

XFX Radeon RX 570 XXX Edition (what does XXX mean?) use real links to real cards for better answers, ok.?
you are not going to OVERCLOCK a PC right,  if  yes, I have no answers for that . ever.

the RX570 is  150watt card that  means it uses that gaming only, (full tilt 3D watts) not in 2D mode, or idle. ever.

that means with this  card and the AUX cable your PSU is missing will run with any PCU with AUX cables if he PSU is at least 300watts, 400watt or more would be savvy,  always do extra watts,

the PSU does not waste power (same 80 gold spec) only what you demand from it wastes power. ok.

best is to buy from a store like Newegg and if one brand, like MSI fails send it back for that Asus or real ATI CARD. or a top Nivdia card , 10 makers. 

when buying high end cards make darn sure you can exchange it ,  first. < DO THIS< AND WIN.

if it fails ask for help, even ask  on the card makers forum,  Asus.com is good brand.

RX570 would require SECURE BOOT OFF and CSM ON.

Would also require the OPTIONAL 365W power supply which is 8 pin not 24 pin standard.

Non dell cards and NON UEFI legacy cards regardless if they are NVIDIA or ATI will require secure boot off.

The only card that works with secure boot on and the stock 290W power supply is the DELL GT1030.

8CCF1 Nvidia GeForce GT 1030, 30w

Retail GT1030 from GIGABYTE, PNY, MSI etc all work fine.

https://www.dell.com/en-us/work/shop/pny-geforce-gt-1030-graphics-card-2-gb-gddr5-low-profile/apd/a9763687/graphic-video-cards

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

Non Dell POWER SUPPLY requires MODDIY adapter.

https://www.moddiy.com/products/Dell-Inspiron-3650-PSU-Main-Power-24-Pin-to-8-Pin-Adapter-Cable-30cm.html

You can get a 365W power supply and a Short GTX 1050 TI or even 1060.  For Non Dell video cards WILL HAVE to turn SECURE BOOT OFF.  When installing an after-market graphics card into a Windows PC with UEFI secure boot enabled, the system may not boot.  This is true for ANY PC not just Dell.  Only short cards 8.5 inches or less fit into the 9020 case.

http://nvidia.custhelp.com/app/answers/detail/a_id/3156

Dell OEM full height but short PCI-E video cards work 

365w PSU =
7VK45 365w, Huntkey
T1M43 365w, Delta

DVP9W Nvidia GeForce GTX 1050 Ti,  4GB, 75w
36V90 Nvidia GeForce GTX 1060, 3GB, 120w
24K8H Nvidia GeForce GTX 1050,  2GB 75w
8CCF1 Nvidia GeForce GT 1030, 30w
1MPR3 AMD R9-360 2GB, 75w
24K8H Nvidia GTX 1050 2GB, 75w

Thanks for the help, and sorry for not being too clear about the graphics card. I plan to use the pc for gaming, but no plans to overclock anything. Here is the link to the product:

https://www.amazon.com/XFX-Radeon-1286MHz-Graphics-RX-570P8DFD6/dp/B077VX31FZ/ref=mp_s_a_1_1?keywords=xfx+radeon+rx+570&qid=1573053270&sprefix=xfx+&sr=8-1

I will do my own research, but I don't have the best knowledge of GPUs and will need some reassurance on the matter.