Hi Richard,
Before you buy one of those brown box cards check the cooling solution (Many OEM cooling solutions are substandard) and the warranty. Also check for empty solder points on the cards. (Usually those cards are stripped bare.)
The only difference in the card I purchased was the packaging. It is a Nvidia card identical to the Nvidia card which I have on my other PC (Which incidentally came with some nice fancy graphics on the packaging), bought in bulk by PC World direct from the manufacturer and then re - sold as there "own" graphics card solution. The support is NVidia direct.
I can't speak for every card PC World sell, but the specs on this one were fine, and it works fine.
In the end, do your homework before you buy.
Always. Thus the first line in my post.
Cheers,
F-Wyg