Hello, I sure am glad that this site exists. I am an extreme newby to external gpu's. After searching all through this site I am unable,myself to answer the questions I have myself, so I am glad this site is chock-full of graphics card experts. I will explain a little about my knowledge, system and what I am trying to set up here. although I'm newby to e gpu I do know what I am doing with graphics cards. I still have my first 3dfx voodoo2 and ati all in wonder and the geforce 1 I used to replace those. saved in bags. 1998/1999. I have wanted to build some kind of e gpu system since 2005 when I got my first expesscard slot. I first saw a PE4H last year sometime, I finally stumbled across the part. I wanted one then but have been trying to decide which version, or forego it altogether and just get an awesome new laptop with sli or something. Now some questions. It seems most on this site are using newer or newest laptops, I7 , I5 ok new is best I get that, but will older core duo or core 2 duo work for this? I have one of each. 1) core duo 1.8 17" 1920x1200, geforce go 7800 ,express card slot max 2.5 gbs. pci express v1 x16 xp pro. And the other is core 2 duo 2.4 17" 1920x1200, geforce 8600gt expresscard slot pci expess v1 x16,max 2.5 gbs. vista, both have bios version A09. I can't find any posts or threads of anyone using old like these. I can output to large screen with both in hd no problems. I don't use the 1.8 any more but have the latest nvidia drivers i can use one this 2.4. forceware 307.83 It shows as dx10 in gpu-z even though it is only a dx9 card. I can play anything dx9 can throw at it ( new Tomb raider, Far cry3 ) the frame rates are low, eye candy off. I want to make this egpu for dx11 and higher frame rates, that is about all. so anything above a g 470m I believe. Does anyone know if I can make this work on this old machine? Will using 2 cables- 1 on express card slot, and 1 on wireless slot will give 4x? or 50% How? 2 lanes? 1 pci slot can use 2 pci ports? All PE4H are 2.5 gbs max except version 3.2 and have 4 port connections. I was sort of leaning towards PE4C v 2.0 ( 2 port connections),but they are out of stock until late August. Will the Gen 3 cards ie. PE4L pci express v2 x16 be backwards compatible with pci express v1 x16? I realize I will only get 1 or 2 lanes max. unless somebody can tell me how to tap the x16 video slot in the motherboard lol. I've been looking. Well I've written half a book and I have more questions but will save some for later, will see if anyone cares to tackle these q's first. Thank you, Dbegen