A) You seem to be in the UK if you're using OCUK. You may be able to shave quite a lot of money off if you buy from Scan instead, especially if you can drive to the shopping park near the Reebok in Bolton to pick everything up. The only issue I've ever had with them was actually MSI's fault, and other places had the same issue simultaneously.
B) The only thing you're likely to use CUDA for is if you take up Blender as a hobby. It's the whole reason I went for the green team for my current GPU.
C) Barely anything recent uses PhysX. All I can think of is Arkham City and Mirror's Edge, and they're not really considered new any more.
D) Until you hit silly resolutions (sometimes 3x 1080p, but usually much more) there is exactly zero difference in in-game performance between the 4GB and 2GB 770, with one exception. This exception is Skyrim with lots and lots of texture mods installed. As most of my gaming time is spent in Skyrim (and because my parents had declared my GPU to be a money-no-object-within-reason 18th birthday present) I decided the extra money for the 4GB card was worth it. There is, however, a slim chance that when new games start filling the PS4 and XBone's RAM with textures, a 4GB card will help in PC games, but given that these consoles bottleneck isn't really texture quality, this isn't so likely.
B) The only thing you're likely to use CUDA for is if you take up Blender as a hobby. It's the whole reason I went for the green team for my current GPU.
C) Barely anything recent uses PhysX. All I can think of is Arkham City and Mirror's Edge, and they're not really considered new any more.
D) Until you hit silly resolutions (sometimes 3x 1080p, but usually much more) there is exactly zero difference in in-game performance between the 4GB and 2GB 770, with one exception. This exception is Skyrim with lots and lots of texture mods installed. As most of my gaming time is spent in Skyrim (and because my parents had declared my GPU to be a money-no-object-within-reason 18th birthday present) I decided the extra money for the 4GB card was worth it. There is, however, a slim chance that when new games start filling the PS4 and XBone's RAM with textures, a 4GB card will help in PC games, but given that these consoles bottleneck isn't really texture quality, this isn't so likely.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56