GPU Card with PCI Express 2 For Supporting Premiere Pro 14.3

Every single graphics card that is compliant with only PCI-E 2.0 is outdated or obsolete. These GPUs are simply too old to be supported at all in newer versions of Premiere Pro. All of the newer GPUs are now PCI-E 3.0 compliant. And PCI-E 3.0 is backwards compatible with PCI-E 2.0 although the card will run at PCI-E 2.0 speeds on such older slots.

And actually, later Z68 motherboards are PCI-E 3.0 compliant on the primary PCI-E x16 slot, as long as you have a 3rd-Generation (Ivy Bridge) Intel CPU installed {2nd-Generation (Sandy Bridge) Intel CPUs are only PCI-E 2.0 compliant}. However, you did not specify whether your motherboard's revision is version 1.0 or 2.0: The 2.0 version of your motherboard supports PCI-E 3.0 on the x16-length slots with the appropriate CPU.

With that said, I cannot recommend a new GPU for your system until you tell us which CPU you actually have. There is a very good chance that whatever I throw out there now may be too overqualified for your CPU. But if you absolutely MUST buy one, then either the $150 GeForce GTX 1650 SUPER (if you're planning to upgrade to a newer, more powerful PC within the next several months) or the $140 GeForce GTX 1650 GDDR6 edition (if you're planning to keep your existing PC for the next several years) is a good starting point for such an older PC. Anything less than the plain GTX 1650 GDDR6 isn't sufficiently more powerful than any integrated Intel HD Graphics to justify its very high (for such low-performance GPUs) current street price. Furthermore, all of the currently-available-new Nvidia GPUs priced below the GTX 1650 have major problems: The GT 1030 does not have a hardware NVENC encoder at all (and Adobe now supports NVENC starting with the 14.2 version), while the GT 710 is about to become obsolete as it is of the now-outdated Kepler architecture. And support for the GeForce 210 and the 8400 GS had already ended completely several years ago.

Moved to video hardware forum.