We would like to thank the following companies for supplying and supporting us with our test system hardware and equipment: Intel, ASUS, MSI, Western Digital, MemoRight and Corsair.
Before we get into the overclocking side of things we will cover the boards that will be in our graphs here today. Along with the ECS A85F2-A Golden which will be running at stock and overclocked, we've got a couple of other motherboards on offer.
Staying with the FM2 platform we've got the recently looked at ASRock FM2A85X Extreme 6 and GIGABYTE F2A85X-UP4. Along with those two boards we've got the Z77 based ASRock Z77 OC Formula and the X79 based ASRock X79 Extreme 4.
Before we get into the performance side of things we need to quickly cover the overclocking side. We headed into the BIOS and straight into the M.I.B X section. We decided to leave the voltages alone in this case as we noticed under CPU-Z that the board was running our CPU at 1.48v. We didn't really want to go much higher than that so we decided to leave the voltages as they were, and mess around with the multiplier.
Our A10-5800K CPU maxes out at around the 4.5GHz mark no matter what we do. Still with that in mind we headed into the BIOS and jumped to a 47x multiplier. We got into Windows at 4.7GHz with no issue. We started running Media Espresso, but unfortunately after a few minutes, it crashed.
From that point we then moved to a 46x multiplier. The results here were extremely interesting as we went from being able to get into Windows 100MHz higher to our system not even booting. We reset the BIOS and tried again and while we got into Windows, we got a BSOD in no time at all. Funnily enough, the system was more stable at 4.7GHz than it was at 4.6GHz. Ultimately, though, the system wasn't stable enough at either speed.
We headed back into the BIOS to move to a 45x multiplier which seems to be the most our APU wants to do. With everything set in our BIOS we headed back into Windows and started testing under MediaEspresso. In no real surprise everything was running as we'd hope with the system now 100% stable. While we've seen some truly awesome numbers come out of the APU based camp for overclocking, they've all been driven by LN2 based cooling. When it comes to overclocking on just standard kind of cooling, the overclocking numbers are pretty consistent with the three boards we've tested all maxing out at 4.5GHz 100% stable.