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March 16th, 2020 09:00

Optiplex 790 MT, AMD R9 390, graphics issue

So I have an dell optiplex 790 mt with a core i5 2400, 4gb of ram, 500 watt power supply, windows 10 and a gigabyte r9 390 8GB graphics card. And for some reason when I launch any game it is stuck on ultra low graphics and wont let me change any of the gaming presets to low medium or high, and only some of the graphics settings will actually change. I'm just wondering if anybody might have a solution to this problem. Is it because I dont have enough ram for any of the games, i dont think that's the problem, but i just dont know.  UPDATED MESSAGE.

9 Legend

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12.3K Posts

March 17th, 2020 06:00

There is more at play than just the GPU. You have an 8 year old system with a generation 2 CPU and very low RAM totals. For any recent game you need at lease 8 GB of RAM and preferably 16 GB. And in addition an SSD is a better choice for game loading and operation. If you check the minimum specs on any game it will specify the minimum requirements. For instance for a game like Fortnite you have barely the minimum which means trying to run Ultra settings is not an option. The game requirements are here.

2 Intern

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2.5K Posts

March 17th, 2020 08:00

w10? 64bit?

go to amd.com

get the correct driver, there, and only there..!

ok?

that card works on my 790MT, not fast, FPS but does fully work,.

R9-380  (close) FurMark at 67=FPS, at 61ºC  ,

and yes 4gigs is weak,  too..

did you forget to wire up the 390 AUX power cable?????  (only watts at idle and 190w 3D full tilt, mine)

your 390 is 275watts just the card your PSU must be wired to it and UP TO THIS HUGE TASK (POWER)

your not the only one with 790, 1000s upgraded, see this.. 12,000 hits on upgrades seen here pay attention.

6 times value of PC in 1 card, wow. that is $300 saddle on a $50 horses... wow..

not many did that high end, sure.

4Gigs or ram bad. for sure 8gigs better!, and for sure run 64bit OS w10., have 16GB in mine. 4x4.

forget 32bit, ok.???  if using that, all support is ending for 32bit (not apps) but drivers, ok? 

and intel ends it on all new chips. so... that too  is sign post to read.. clear..

turn off RST in BIOS, intel ended support below (chipset 100 series.) and just sata driver lean  works from MS.

yours  is Q65,  not 100..  so no RST allowed, no raid and all that.  (windows raid yes, intels no.)

no games told, and the data sheet on them tell what min is... clearly. 

2 Intern

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2.5K Posts

March 17th, 2020 08:00

no ssd

no PSU told

 no OS told

 

9 Legend

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47K Posts

March 17th, 2020 09:00

AMD R9 390 isn't going to work because its a UEFI Bios card.

Class 1 bios requires MSDOS VESA video mode 103  INT13 mode.

You can use earlier Radeon HD series cards or Nvidia Cards up to PASCAL GT1030.

The other issue is that the stock power supply does not support a 75W card.

https://www.youtube.com/watch?v=2y32mBdZHJY

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

 

5 Posts

March 18th, 2020 11:00

Yes I have everything wired to it straight from my 500 watt power supply. I do have windows 10 64 bit and have the latest drivers download from amd.com. But I actually only paid 85 dollars for my r9 390. I paid about the same for the computer and the graphics card. I built this pc on a 200 dollar budget that I got from Christmas. But thankyou for the reply. @savvy2 

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