Yet another experience to flegendre/interest of a workstation.
I've been on SW since 97, I've had x experiences with "basic" assembled PCs, with open gl lambda cards.......................... Very often very little difference with expensive workstations. I even had a toshiba laptop made of celeron that performed calculations that the beautiful DELL station could not do. On my last PC built with I7-4790K ......it's a 1G MSI card at 22 €............works as well as the pros on consistent assemblies. It doesn't go into realview, but it's 2% of my needs.
But I have sometimes rendered on a Dual Core 4GB of RAM classic sata disk, Windows 7 with Nvidia graphics card 220M of memory.
It was an Asus at 850 euros there. It's true that it's not the best, far from it, but I was putting out stuff :p
Considering how computer hardware is evolving, I think that at the moment, you can find yourself a pretty simple quad core. But personally, I would advise you to wait a little, just to have 300-400 euros more to make sure you last a little longer.
Then maintain it to death, because it will heat up a lot and get a lot dirty.
(complete internal cleaning, change of thermal paste etc....)
On the market, there are high-performance laptops with high-performance graphics cards................ But unfortunately they are not RealView compatible.
The cards decreed (good term?) that can be counted by SW are confidential, with costs that are also confidential (NVIDIA PRO and ATI PRO range). The compatibility "throttling" is in the software. As proof you had the % Realhack which allowed you to activate the realview on some cards.