Hi everyone.

I'm having poor performance issues crossfire using an AMD A8-5600K/Sapphire HD6670 1GB PCI-E card.

The System's specs are:
Sapphire HD 6670 1GB GDDR5 PCI-E Graphics Card
AMD A8 5600K Black Edition 3.6GHz
Gigabyte GA-F2A85XM-D3H A85X Socket FM2 Mainboard
Seagate 1TB Barracuda 3.5" SATA-III Hard Drive - 7200RPM 64MB Cache
Kingston 8GB (2x4GB) DDR3 1600MHz HyperX Genesis Memory
CIT 750W Power supply
Microsoft Windows 8 64-bit

I based my choice of hardware on online reviews and benchmarks results.

Crossfire is enabled according to the Vision Engine Control Centre and the latest AMD drivers are installed. Windows is up to date. Otherwise all other hardware and system settings are unmodified.

I thoroughly benchmarked the system with several synthetic tools and several games prior to enabling crossfire. I then enabled crossfire and retested. The results are :

                                                     Before                       After

3DMark Vantage                        7386                          8306
3DMark 2006                             11995                        14175
3DMark 2011                             1794                          2203
PCMark 7                                    2682                          2687      
Unigine Heaven                         fps 35.5                    fps 29.4
                                                    Score 893                 Score 741
                                                    Min fps 19.8            Min fps 16.1
                                                    Max fps 68.8           Max fps 64

As you can see, apart from the Unigine scores, every benchmark has improved after enabling crossfire. (Although not as much as I was led to expect.)

With fps in games however, things are far from convincing.

                                                     Before                       After      

Dirt 3                                            75                             69      
Fraps Portal                                284                            300      
Fraps Skyrim                               54                              52      
Fraps Alan Wake                         49                              60      
Fraps Far Cry 3                           16                              18      
Fraps Sniper                               70                              48      
Fraps Aliens CM                          59                             54

As you can see, performance either drops or improves only minimally.

Is there anything anyone can recommend to help resolve these performance issues. This system is only a week old and I am already beginning to regret putting it together with these components.>>

Please advise.>>

funster58