Need help with choosing a specific graphics card

ProgramGuruCpp

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Mar 23, 2014
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Hello all! (This is my first post on Tomshardware so let me know if I'm posting in the wrong place.)

Okay...so I have an HP Compaq dc7800 Small Form Factor computer. I plan on using if for gaming and right now I am trying to figure out what graphics card to use.
The problem is with the motherboard though. It supports PCIx1 PCIEx1 and PCIEx16. To my understanding, the former two (PCIx1 and PCIEx1) are not good choices for gaming. The PCIEx16 is--however, on the motherboard it says "ADD2 support only."
I've been doing a lot of research and I cannot seem to find a graphics card with ADD2 support. Intel supposedly made this type of port (ADD2/SDVO) so that a monitor and television can run at the same time (or something along those lines).

So...does it seem I won't be able to use a card in this slot? If so, I could use one in the PCIEx1 slot, but I know the performance would be drastically reduced. Any suggestions on what I should do would be greatly appreciated.
 

bakluka438

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Mar 23, 2014
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Since you are limited by two things, you have a slim case and you have only pci1 slot (Pciex16 is not for GPU) the best you can get is this
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121591
It's a 6570 low profile, the thing is that gpu is not so powerful so even pci 1 wouldn't drastically decrease the it's performance. You could play many games on low-medium settings with this card and it's nice card to upgrade if you don't have plans to upgrade you system soon
 

ProgramGuruCpp

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Mar 23, 2014
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Thanks for the fast response.

I just looked at the card you mentioned...but the specs say it's a PCIE2.1 x16. Does that mean it would have to fit in the PCIEx16 slot on the motherboard? If so, I don't think it would work because the slot only supports ADD2/SDVO compatible devices.
 

Dom_79

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No, it most likely wouldn't work, also you cant use a PCIE x1 to x16 adaptor due to the size of your case.

And unfortunately your 135W power supply won't support many (including the one suggested) GPUs.

It seems (after reading the info on the HP website) that your PC was meant more as an office computer than anything else and wouldn't upgrade well.

Sorry to be the bearer of bad news like that :(