No you see the 5700 only has 4 pipes the 5900Xt has 8 pipes it makes a huge difference just look at the benchmarks, the 5900XT almost doubles the 5700U is some places.
8 pipes, DDR1. This should do just fine your game. I'm considering this one too for my setup. If you're considering PCIe. Is this better than the FX cards equal to this?