PCI (no express) GPUs I have a mining rig, with 2 PCIe (already being used) and 4 PCIs without use. I was thinking to buy a PCI based ATI card like http://www.club-3d.com/index.php/products/reader.en/product/radeon-hd-5450-pci-noiseless-edition.html but I was wondering if anybody has experience running PCI GPUs to mine.

EDIT: to avoid off-topic:

I'm not interested in FPGA or ASIC. I just want to know if the card cited is able to, for example, do opencl.
You can actually pick up a PCI to PCI-E 1x (open end) adapter and plug in any video card you want. Then use a PCI-E 1x to 16x adapter. This is an example, but there are cheaper ones out there.

http://www.quill.com/startech-pci-cards/cbs/352874.html?cm_mmc=SEM_PLA_T_352874