1. Bottlenecking - can the processor and the chipset - process the information quickly enough to feed the graphics.
2. See this it will help
http://sites.amd.com/us/game/product...ics-cards.aspx
3. Ideally they should be matched but providing they are of the same family eg. in your case the 54 it will work
4. Monitor refresh rate
5. Does the game need crossfire, as unless the requirements of the game at max are more than the single card can handle there is no benefit whatsoever to crossfire.
6. PSU amps on 12v rail sufficient for the two cards, although, depending on the make of the card, they do not I think have a separate power supply, I think they draw their power from the PCI slot and the max demand is about 20 watts
http://www.guru3d.com/articles_pages..._review,6.html
8. I presume the monitor is connected to the primary card, as I do not think these cards have a crossfire link connection.
9. I do not mean to be critical of your setup - but the 5450 is not really a card capable of coping with high demand graphics, so I wonder if your system in general is sufficient to achieve any real benefit.
10. Perhaps this will also help
http://www.tweaktown.com/articles/31...ire/index.html
11. Does the motherboard have the correct slots for crossfire with these cards to work properly
as the card requires
PCI Express 2.1 x16 bus interface
and if your Motherboard does not have TWO of these, rather than two which then work at 8x it is never going to provide the full benefits of crossfire
2. See this it will help
http://sites.amd.com/us/game/product...ics-cards.aspx
3. Ideally they should be matched but providing they are of the same family eg. in your case the 54 it will work
4. Monitor refresh rate
5. Does the game need crossfire, as unless the requirements of the game at max are more than the single card can handle there is no benefit whatsoever to crossfire.
6. PSU amps on 12v rail sufficient for the two cards, although, depending on the make of the card, they do not I think have a separate power supply, I think they draw their power from the PCI slot and the max demand is about 20 watts
http://www.guru3d.com/articles_pages..._review,6.html
8. I presume the monitor is connected to the primary card, as I do not think these cards have a crossfire link connection.
9. I do not mean to be critical of your setup - but the 5450 is not really a card capable of coping with high demand graphics, so I wonder if your system in general is sufficient to achieve any real benefit.
10. Perhaps this will also help
http://www.tweaktown.com/articles/31...ire/index.html
11. Does the motherboard have the correct slots for crossfire with these cards to work properly
as the card requires
PCI Express 2.1 x16 bus interface
and if your Motherboard does not have TWO of these, rather than two which then work at 8x it is never going to provide the full benefits of crossfire