DDR5 vs DDR3

Solution
http://www.pcadvisor.co.uk/reviews/pc-components/3533832/asus-radeon-r7-250-1gb-review/

"...but there are versions of the 250 restricted to GDDR3, and you should avoid those."

(They probably mean "DDR3" not "GDDR3" but that answers your question. Either way, I'd recommend a 2GB video card with a bit more processing power for any type of gaming.)

*For 32-bit Windows you should get a 1GB video card as it can only address 4GB in total which includes system and video memory and minor other things. For example, a 2GB video card might limit you to about 1.8GB of System memory if you have 2GB or more installed whereas a 1GB card would allow about 2.8GB if you have at least that much installed. Below 1GB of VRAM and you'd have far too many...
http://www.pcadvisor.co.uk/reviews/pc-components/3533832/asus-radeon-r7-250-1gb-review/

"...but there are versions of the 250 restricted to GDDR3, and you should avoid those."

(They probably mean "DDR3" not "GDDR3" but that answers your question. Either way, I'd recommend a 2GB video card with a bit more processing power for any type of gaming.)

*For 32-bit Windows you should get a 1GB video card as it can only address 4GB in total which includes system and video memory and minor other things. For example, a 2GB video card might limit you to about 1.8GB of System memory if you have 2GB or more installed whereas a 1GB card would allow about 2.8GB if you have at least that much installed. Below 1GB of VRAM and you'd have far too many issues with games.

GPU comparison (not all cards listed): https://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_750_Ti/25.html

Price comparison: http://pcpartpicker.com/parts/video-card/

Best value is best performance vs price (as well as quality and features). If you can afford it I recommend one of these cards:

http://pcpartpicker.com/part/sapphire-video-card-1003662l
or
http://pcpartpicker.com/part/xfx-video-card-r7260xcnf4
 
Solution