Installing a Geforce 9800gx2 SSC videocard

[servaasd]

Hello,

My problem: I want to install a new videocard, the geforce 9800gx2 SSC (super super clocked).

Problem one: What powersupply should I buy to deliver the power? I'm thinking of buying this one, a silverstone SST-ST1000 (http://www.technical-assistance.co.uk/store.php?i=B000W2YL8I&c=uk).
The power supply will only draw as much power as is required, and a highly loaded power supply will generate more heat than one that is proportionately lesser loaded, even if it is supplying the same amount of power. So if both a 850W and a 1000W PSU are both supplying 750W, then the 1000W one should run cooler. (is this true?)

Problem two: The geforce 9800GX2 needs PCI-express 2.0. I now have a geforce 9500GT, this card also requiers pci-e 2.0. I think my motherboard has pci-e 1.1, so it will run on it. (is this true???)

Problem tree: The cooling... if you check my pc pictures, you'll see that I have no external fans installed. The GPU will generate alot of heat, + the geforce 9800gx2 SSC also produces alot of heat because it's overclocked as *censored*. Where can I install a fan, and which one/type should I buy? I'm thinking of placing one fan on the back of my pc, at the bottom their is a place that supports a fan of 80mm I think.

These are some pictures of my pc (inside and outside):
http://s283.photobucket.com/albums/kk315/Sertn/?action=view&current=pc15.jpg
http://i283.photobucket.com/albums/kk315/Sertn/pc.jpg?t=1213120665
http://i283.photobucket.com/albums/kk315/Sertn/pc14.jpg?t=1213120234
http://i283.photobucket.com/albums/kk315/Sertn/pc19.jpg?t=1213120373

These are my systemspecs:
AMD Phenom™ X4 9500 quad-core processor
3 GB DDR2 Dual Channel RAM
500 GB S-ATA harddrive, 8 MB Cache, speed:7200 tpm
NVIDIA® GeForce® 9500 GT / 256 MB DDR3 SDRAM
MSI MS-7501 motherboard

Hope you can give me some insight in the world of modding. I'm a very huge newbie, so please help me, give me information about all those parts etc. Try to explain it as simple as you can 

Thankx in advance

[homer]

Problem one: you do not need to worry about heat generated by the power supply. i would base my decision, of what power supply to get, on my power demand. if you plan on getting a second 9800gx2 i would purchase the 1000w.

Problem two: your graphics card will run on a PCI-E 1.0. according to benchtests the difference between the two (1.0 vs 2.0) is negligible, at least for now.

Problem three: i reviewed your pictures, and quite frankly i suggest a new case. your case has horrible ventilation. it is not, in the least bit, streamlined for adequate ventilation. most gaming cases today have at least one intake fan mounted low on the front of the case and one exhaust fan mounted high up in the back. some cases also have side or ceiling case fans. pic_1 is a picture of a comp streamlined for ventilation. cold air enters low and hot air exits high up because hot air rises. if you cannot afford a new case, then i suggest cutting a hole into the side panel of your comp for a 120mm fan right where your graphics card will sit. pic_2 is what i did to my comp to cool my graphics card. you can see its only an 80mm fan, but my case has fairly good ventilation as it is. an added note, that 80mm fan dropped my temps by about 5-10C.

i also wish to ask, why are you purchasing a factory overclocked card? they cost more then the stock card and its easy enough to overclock it yourself.

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[apple266]

Yeah get fans or you risk overheating. New case is advisable.