New series of GPU cards

[Dirk Broer]

Updated the charts, Radeon RX 5600 XT is our present champion

Here he/she is, compared to some former champions:

Model/Type	GPU	Fab (nm)	Shaders	TMUs	ROPs	Compute Units	GFLOP SP	GFLOP DP	GFLOP HP	TBP	Gflop(SP) /Watt	Gflop(DP) /Watt	Gflop(HP) /Watt
Radeon HD 5970	Hemlock XT =2x Cypress XT	40	2x 1600	2x 80	2x 2	20	4640	928.0	-	294	15.78	3.16	-
Radeon HD 7990	Malta XT =2x Tahiti XT2	28	2x 2048	2x 128	2x 32	32	8192	2048.0	-	375	21.85	5.46	-
Radeon RX 5600 XT	1x Navi 10 XLE	7	2304	144	64	36	8066	504.0	16131	160	50.41	3.15	100.81