a dual slot card will fit in your optiplex -- you'll just lose the use of one PCI slot. the hd 4670 is about the most your 305W power supply can handle... it is too small to use with any card that required a seperate pci-e power connection.
This problem relates to a Dell Optiplex 960 (Mini tower). I am aware of the guidance on "Sticky" but I think this is relevant to all computers.
I have a big problem. I ordered a Dell Optiplex 960 from a Dell Partner and was promised two weeks delivery. After 12 weeks it turned up. I ordered a Graphics card but when they tried to fit it they couldn?t because it was a dual slot card and the PCI slot on the Optiplex is the top slot and there isn?t room for a dual slot card. A Sapphire HD 4850 was suggested that requires 450 watts and a single slot but the reviews state that the card can run at temperatures of 95C and it is not recommended. I turned it down. Apparently a Sapphire HD 4670 GDDR4 will fit although it is a two slot card (It doesn?t actually use the second slot but has a high fan). So they are going to bench test an HD 4670 GDDR4 that requires 400 watts but the Optiplex only has a 305watts power supply so the question is: Am I going to encounter problems with power? The monitor I have decided on is a 22 inch 1680 X 1050 resolution, but I have told that I could change this for a 24 inch 1920 X 1200 if I wanted to. What happens if there is not enough power to run the computer and the graphics card? The card that Dell recommends is an HD3470 256Mb but that won?t even run games.
The problem is that the Optiplex is a business machine and now it looks as though it isn't suitable for my use but I didn't appreciate the possible significance of power supplies at the time. (Iam not an expert and that is why I went to a Dell Partner). At the outset I told the Dell Partner what I wanted the machine for (Including a bit of gaming) and I feel like rejecting it but that will cause a storm.
Does anyone have any thoughts please?