Hi, I am having some issues with my PC and would really appreciate any insight! First off, my setup: CPU: AMD Phenom II X2 555, 3rd core unlocked; CPU-Z says it runs at 3.2Ghz under full load. Memory: 16Gb DDR3 Video: Two Sapphire Radeon HD 5770 1GB 128-bit GDDR5 cards in Crossfire; the 2nd card was added maybe a 18 months or so after getting the first one; this goes to my receiver and my TV running at 1920x1080 Mobo: ASUS M4A87TD EVO AM3 with 2 2.0 PCI-e slots (16x, 4x) HD: My main one, where my Steam files are, is a WD Caviar Black 1TB 7200rpm OS: Windows 7 Catalyst Control Center (CCC): v13.4; hardware info shows both the primary and linked adapter (primary running at PCI-e 2.0 at 16x, the linked card running at 4x) I just updated from CCC 12.4 (or 12.8?) and I have had Crossfire enabled every since installing the second card. With CCC 12.4, and every previous version of CCC I've had, about 60% of the time when I booted up from shutdown, I'd have to go back into CCC and re-enable Crossfire; for some reason it would be disabled on restart more often than not. I've only had 13.4 for a day now and I have not yet shut down my PC. My main issue is basically I have never really noticed any difference from running in Crossfire vs running one card when gaming (Crysis 2, BF3, Portal 2, others). I think I am fooling myself into seeing a difference, but sometimes I would start up my system, start gaming (and it seemed normal), then remember that I didn't check if Crossfire had been disabled so I would recheck and see it was disabled and so I would renable it, and then go back to gaming and not really notice a difference. Does that make sense? And sometimes it would even seem worse. So I bought Hitman Absolution on Steam (not pirated) and noticed that it had benchmarking which I've never done. These are my in-game settings: Resolution: 1920x1080 Fullscreen checked Refresh Rate 60 VSync checked MSAA 2x Exclusive Fullscreen checked Aspect Auto Quality: Custom Shadow Medium Texture Quality Normal Texture Filter Anisotropic 2x Reflections Medium FXAA checked Global Illumination unchecked Tessellation unchecked Level f Detail Medium Depth of Field Medium SSAO Normal Bloom Normal With my previous version of CCC my FPS averaged around 24.8, but I didn't write the exact numbers down. I went to the AMD website and saw a new CCC version and the new CAP with Hitman Absolution. I uninstalled all previous CAPs, and ran the 13.4 installer to remove my previous version of CCC. Then I rebooted, made sure display drivers were all uninstalled, and installed 13.4. I ran benchmarks with Crossfire on and off, then installed the new CAP and ran benchmarks with Crossfire on and off (each three times, "A", "B", and "C"). Here's my avg FPS: Crossfire Enabled, no CAP A. 26.3fps B. 28.13fps C. 27.8fps Crossfire Disabled, no CAP 1. 29.9fps 2. 30.5fps 3. 30.5fps Crossfire Disabled, CAP installed 1. 30.3fps 2. 30.3fps 3. 30.3fps Crossfire Enabled, CAP installed 1. 16.4fps 2. 16.3fps 3. 10.4fps! So it almost looks like my best settings were with Crossfire disabled and no CAP. So....Why? I mean, if I enable Crossfire and I do what AMD suggests and use the latest CCC version with the lates CAP, I get 10-16fps! I am not too technically inclined, so I was thinking I either have a faulty 2nd card (although CCC says it's linked) or my 4x PCI-e slot is slowing everything down, or I really don't know. If you have any ideas/suggestions please let me know!