how much should I spend on a card to avoid this issue?

[ingear]

long story short when I play even 480p or 720p youtube videos or movies ...

I get these horizontal lines now and then :/

SEE http://imgur.com/a/iuvYD

I've tried two cards now

EVGA GeForce GT 610 2048MB https://www.amazon.com/EVGA-GeForce...64&sr=8-1&keywords=EVGA+GeForce+GT+610+2048MB
and
now
MSI ATI Radeon HD6450 1 GB DDR3 VGA/DVI/HDMI Low Profile PCI-Express Video Card R6450-MD1GD3/LP: Electronics
https://www.amazon.com/gp/product/B004X6ABTM/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

PS it's a Dell Vostro 230 Mini Tower
* Intel Core 2 Duo E7500 2.9GHz
* 3GB RAM
* 32-bit Win 7 Home Premium
* before I used on board Intel VGA

* Windows Experience shows 4.1 - http://i.imgur.com/qXL5qIJ.png

PSS how do we attach images on here? thank you

 

[Flapdrol1337]

Could try and disable gpu acceleration. The cpu should be able to do it too.

Otherwise maybe buy a 1050, complete overkill but will easily handle all video playback, also h265 when youtube starts to support it. An RX 460 or gtx 950 should also support it, but a 1050 plays a blue ray with a remarkable 5W powerconsumption.
https://www.techpowerup.com/reviews/MSI/GTX_1050_Gaming_X/25.html

 

[SlickR12345]

Its an issue with the rendering. Probably corrupted drivers. Try turning off/on hardware acceleration and see if there is a change!

You shouldn't have a line with any of those GPU's. Maybe its your monitor as well, since you claim you don't get them all the time, so maybe a monitor issue! Its clear its not GPU issue, since you've used two GPU's and the issue persists.

So either driver/operating system problem or monitor problem!