[texas booster]

The NVS 510 chipset was launched in 2012.

So, no GDDR5.

I don’t think that any of the Kepler chips were ever paired with GDDR5.

[texas booster]

Nvidia officially announced the first graphics card using GDDR5X, the Pascal-based GeForce GTX 1080 on May 6, 2016. Later, the second graphics card to use GDDR5X, the Nvidia Titan X on July 21, 2016, the GeForce GTX 1080 Ti on February 28, 2017, and Nvidia Titan Xp on April 6, 2017.

Even though GDDR5 existed in 2012, it wasn't cheap enough to use in mass market graphics cards then.

The NVidia 640 is a mass market version of the workstation NVS 510.

[Paul R.]

Yeah, explained that way, it makes sense.

Thx.

[Paul R.]

Interesting though, as one of the other cards I looked at (might have been the GT 710) definitely can be found in GDDR3 and GDDR5 versions. I assume the full part number surely changed, but didn't research it, as these NVS 510's looked more appropriate for my needs (display, not gaming) and are usually cheaper, both as refurbs.