Finding cheapest aftermarket GPU with 240hz support

[a3d]

Hello guys! Currently i stuck with a problem, i plan to upgrade my PC, but i am a bit limited with my budget.
I mostly play old or games with low graphics requirements (osu, csgo, cs1.6, half life, quake etc.)
I plan to buy rx 2080ti super or rx 2080 super in future to play modern AAA titles, but for now i need a cheapest aftermarket graphics card which support 240hz. As far as i know, the main issue is driver support, since amd GPU's have displayport 1.2 starting from HD 6000 series, some old gtx 580 also have dp 1.2,

Note: please dont offer cards like 1050, 970, 780 , rx 470, rx 480 etc. those cards are too new and cost 150$+, its a waste of money for me since i plan to buy high end GPU in future and gtx 560-570 performance is fine (240-1000 fps in the most old titles) for my current needs.

I just need to know, if someone can confirm working 240hz on old amd/nvidia GPU with displayport 1.2 for example (HD 6900,7900, r9, r7, gtx 650, gtx 750 etc, gtx 580, old quadro (rofl).)

So the main point of this topic is to find cheapest aftermarket GPU that have confirmed and tested 240hz support, that would be extremly useful for people like me, that plan to have a temporary solution for a couple of month, before buying high end latest and greatest GPU. Or mayby someone already have high end old gpu, that meets the personal gaming requirements and want to know, if he need or not need to upgrade GPU just to get 240hz. Also, that would be interesting to test if its possiable to get 240hz using onboard graphics.

People with old GPU's and newest 240hz screens are welcome to test their screens! Please share your compatibility results.
Feel free to share minimum gpu requirements provided by different 240hz screens manufacturers. Also, share your oppiniong about possiable issues in such use case like high delay because of low bandwidth.

[Chief Blur Buster]

Since even a 20-year-old graphics card has been coaxed to do 640x480 240Hz, the weak link is in a few specific areas other than refresh rate. Cable bandwidth is in number of pixels per second...

Some tips:
(1) 4K 60Hz is identical in cable bandwidth to 1080p 240Hz.
(2) Any graphics card capable of outputting 4K can do 1080p 240Hz

So a card that advertises 4K 60Hz over a single cable will work, since 4K 60Hz came out before 1080p 240Hz. Avoid cards that say "4K 30Hz" -- those won't do 240Hz at 1080p.

Don't forget to consider the resale value of the GPU. An old used GTX 780 tends to resale at nearly the same value as buying it 6 months ago. So while you pay $150, you may very well lose close to $0, because Quake/CS:GO remains popular, and a 780 still runs those games at triple-digit frame rates, and the next person will buy your card because it still runs those popular old games (which will still be popular in 6 months) at quite competitive-friendly frame rates.

Additionally, if you decide to go cheaper and older, consider the GeForce GTX 680 can do 220Hz at 1080p or 240Hz at 1280x1024. You will have to use NVIDIA Custom Resolution to create a custom 220Hz 1080p mode but it works. Make sure you stick to 240hz monitors that are Hz-multisync in 1Hz increments (not all of them are, but all the BenQ ZOWIEs are). Fortunately I think nearly all of them are nowadays.

Which model of 240Hz monitor do you have?

[a3d]

Additionally, if you decide to go cheaper and older, consider the GeForce GTX 680 can do 220Hz at 1080p or 240Hz at 1280x1024. You will have to use NVIDIA Custom Resolution to create a custom 220Hz 1080p mode but it works. Make sure you stick to 240hz monitors that are Hz-multisync in 1Hz increments (not all of them are, but all the BenQ ZOWIEs are). Fortunately I think nearly all of them are nowadays.

Which model of 240Hz monitor do you have?

Sad to hear, i currently own HD 6970 and plan to buy Acer nitro XF252Q or 27 inch version of this screen.
Is there a huge change that it would not possiable for me to get 240hz using this card?
This card have mini displayport 1.2. Drivers are not supported since 2016 (Crimson Edition 16.2.1 Beta)
This card provides me the reasonable fps in the most games that i can currently play.