Two different issues. New AMD cards are known NOT to work on older machines.

For the GTX-1060 (you don't mention make/model),
try a cleaner-install of the proper driver (from www.nvidia.com ).

If a v419.x release doesn't work, try the last v418.x release (v418.91) 

I wonder why are you still on Windows-7 ?

The 9020 does not work with a 75W or greater video card without the updated proprietary 365w power supply.  The stock unit is 290W

NON dell cards will require SECURE BOOT OFF and Legacy option roms ON.

Thats what I own. 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

I am running a 650w power supply with a 24 to 8 pin power adapter in legacy mode, secure boot off on an ASUS 1060 3G card.

Thank you for your time and input

Tony

The brand of the card is ASUS 1060 3G. The reason for win 7 i had a copy and that's what the MSI RX570 has drivers for it was the 1st card I bought . It was that or windows 10 there where no drivers for win 8, 8.1. I won't run win 10 till I absolutely have to.I am trying to set up a budget virtual pinball machine. its turning out to be not so budget. the drivers are the latest 419.67 I tried the 418 drivers they didn't work either.

Thanks for the reply

Tony

650W is too small.

BARE Minimum working is Specific EVGA 750B1 or 700B1

100-B1-0700-K1

https://www.amazon.com/EVGA-BRONZE-Warranty-Tester-100-B1-0700-K1/dp/B018JYHBE6/

I've been buying the 700B1 because the 750B1 units are hard to find now.   N1 B2 B3 BR BQ G2 versions from the same vendor DO NOT WORK.

I bought one of those 700W power supply today it should be here by Wednesday I hope it works or another 150$ wasted. Could I ask you a few questions. in your first post to me  you say i need and list a proprietary power supply that is dell at 365W this is what you own and you listed my card at 120W which is what i found on a similar card https://www.tomshardware.com/reviews/nvidia-geforce-gtx-1060-pascal,4679-6.html then in your 2nd post to this tread you say the 650w power supply is not enough and you list a specific 700W power supply. what makes this power supply proprietary it appears it needs the same 24 to 8 pin power adapter as I am using for the 650W power supply i am using now. Please take no disrespect in my questions

Thanks for your time and input

Tony

The 24 pin power supply connector is 8 pins.  The proprietary power supply only has 12v rails.   The only way you get the evga power supply working is with an adapter from MODDIY CAB359.

https://www.moddiy.com/products/Dell-OptiPlex-9020-PSU-Main-Power-24%252dPin-to-8%252dPin-Adapter-Cable-%2830cm%29.html

Power supplies that have problems from 350W all the way thru 850W issues are due to INSUFFICIENT power on the 3.3v/5v rails.  Larger than 875W tend to NOT PHYSICALLY fit into a DELL Case. The Dell units all the way down to 305W have 150W or more COMBINED power on the 3.3v/5v rails and 25Amps or more on those rails.   EVEN EVGA 750 and 850W units will fail if they are not the B1 series for this exact reason.  The 750B1 and the 700B1 are fine.  The 750B2 750B3 750N1 750BQ are all BAD and do not work.  The only difference between these units from the SAME VENDOR is the combined max power on the 3.3v/5v rails.  Dell 875W units have 225W combined on these rails and over 25AMPS on each rail.  The problematic units have 90W to 130w max on the 3.3v/5v rails.

DELL 875W with 225W combined on the 3.3v/5v rails 30 AMPS on 3.3v

DELL 525W

DELL 460W

GTX 1060 3G   ( I have the new gtx1050 and only uses 75watts max , and needs no (has none) AUX  power jack,

called ATX PSU V.2.2 up grade.

the SPEC (no manual) tells you the current, my old GTX160 used 30 amps of 12vdc power to run this card but the new

cards, are vastly less.  The old card must have AUX power and  360  more watts on top of (all else in there)

all else int here not stated, (I have 2 HDD and 2 SSD and 1 M.2 drive in mine, so......)

lets read your spec on your card, really this is first, step always, to do any power budget.

this card does 7680x4320@60Hz resolution.

and certified for Windows 7-101, Linux, FreeBSDx86

the power demand just for this card is 120 W alone as  stated in the manual for it.

so that adds to the other system demand, ok?

ON the top rear of the card, see that black 6 pin power AUX jack, this is NOT OPTIONal, ever.

when you see that on a mobo or GPU card, see to self, NOT OPTIONAL.

you must run A PSU that has that connector, or adapter

the ATX spec. on PSU covers this topic,  v2.3 and up is best, that has that cable.(4x4 is common) not 6.

the Asus site has no real install manual now.  (they cover drivers, and things but no actual install guide)

Inserted in top 16x PCI-express slot, only. (in most PCs on earth due to BIOS rules.)

Missing manual , not covering, like how to get the 6 pin connected, is not there. (nor at MSI or gigibyte)  using same chip set.

the ATX spec is no secret and is covered here, (not too well but yes, here)

wiki link is ok to post, I'm sure.... (non commercial)

https://en.wikipedia.org/wiki/ATX#ATX12V_2.x

v2.3 up is best.

the 6 pin ended at 2.0version.

but you can use 4 pin in to 6 or with a y-adaptor 4 to 6 pins,  and  you need and extra 10 amps of current on the 12vdc rails. to this jack.  The card does not use lower voltages there,

if not the GPU crashes.

but your card uses 3 times less current than my old  GTX160 so is EASY,

my old 160 would heat my room up in winter, the 1050 runs dead cool.

yours burns 120watts or a tad more. ABOUT 2 TIMES MY 1050 (love mine, it runs any game)

There is my lil , talk on power.  (budget)

Next time tell all things inside the PC, case. all drives,if rust hdd or ssd and how many. for better answers, thank you.

I am using a cx650m power supply it has 150W combined 5V@20A 3.3V@24A and because I am not over 25A on both. I am under powered on both 5V an 3.3V?

I am using a cx650m power supply with an 24 to 8 pin power adapter. 2ea 120G SSD in raid 0, 12 gigs ram with an ASUS GTX 1060 3G and a dvd drive

Thanks for your time

Tony

I tried a Antec  EA-650 that has 160W combined at the 5 and 3.3W both @ 25A ea and it still black screens right after the windows splash screen.

Thanks for your Time

Tony

black screens right after the windows splash screen.

This is not a power supply issue its a windows installation issue. I have a 9020 with GTX 1060 and windows 10  1809 and it works fine.

I tried win 10 with the latest drivers last night and got the same black screen,  then I couldn't get in safe mode to uninstall the drivers and so I gave up last night, I had enough fun. today I researched and finally got into safe mode had it try to repair itself I'm pretty sure it reinstalled the OS with the 1060 in the machine. it rebooted then it went into endless reboot and I'm not able to safe mode. So now i'm downloading and going to reinstalling win 10 and try again.  I just saw your post What was the 1809 # on your post  the win 10 build # or the driver ver # or something else?

Thanks for your time and input

Tony