|Ok I tell you what I'll just go for the HD 7750 and take you're word for it that diagram is bit too crowded. The only thing is I'm a little confused, there seems to be more than one card called HD 7750. You have the AMD Radeon HD 7750 (which is the one I think you're talking about) and there is another one called the Sapphire HD 7750 (I don't think this has PCI Express anyway). However the one I want to get is this..|
As mentioned earlier it's the VTX3D AMD Radeon HD7750 1 GB Graphics card and it has DDR5.
EDIT: Ok guys there's just one issue, according to the review AMD Radeon has a digital only DVI connector and will not work with a DVI connector which is both digital and analogue. I don't think this should be a problem. I can see three DVI connectors on my computer the one which my current graphics card is connected to seems to be both digital and analogue but I can see a digital only DVI further down my computer at a vertical angle, it's also smaller than the one currently holding my graphics card, I'm assuming I would use this DVI connection.
Ok a better way of describing it is to look at this link again.
See under Back I/O Ports (further down the page) the connection I'm talking about is number 3 DVI-D. Hope this makes sense.