No. I was stating something that doesn't make sense on purpose because of the title of your post. Trying to be funny in a nerdy way and failing I guess.
The most you're going to get is 250MB/s because the slot is going to limit your bandwidth to 1 lane of PCIe 1.0. So if you want to use a SATA 2 card in the slot, it makes more sense. You'll almost get full theoretical bandwidth out of a single disk. If you add more disks to the card, they'll have to share the slot's bandwidth.