HPDC5700MT - Suitable GFX card

[mudfrog]

Good morning,

I've inherited a HP DC5700MT PC and would like to install a better gfx card.
I'm not after anything demanding just something that can handle Football Manager 2011. :-D

I know the HP DC5700MT has 2 PCI and 1 PCIe x1 (ADD2 only) slots. No PCIe x16 slots.

Would the following be ok?:
scan.co.uk/Products/512MB-PNY-8400-GS-PCI-64-Bit-1000MHz-GDDR2-567MHz-GPU-D-Sub-Dual-Link-DVI-I-S-Video

I know the PC was intended for business use but would like to eek a bit more out of it if at all possible.

Thanks.