That HD 5850 is not low profile. From the last section of the specification list...
- Single or Dual Profile - Dual
- Active or Passive Cooling - Active
- Power Connector Required - Yes
- Low Profile - No
1. It is a "Dual Profile" card, meaning it uses two slots.
2. It uses active cooling.
3. It requires additional power connections.
4. This is not a Low Profile video card.