AMD Bulldozer FX-8150
To overclock the FX-8150, we used the ASUS Crosshair Formula V and the Gigabyte 990FXA UD7. In our overclocking run, we used custom water and ran some temperatures on the Antec 920 All In One watercooler.
Stock frequency on the FX-8150 is 3.6GHz with your standard reference clock of 200 and a 18x multiplier. The core voltage here is throttled down to 1.224V.
CROSSHAIR FORMULA V
Using Turbo in the BIOS and maintaining voltages on auto, the FX-8150 reached 3.9GHz. 4.2GHz is obtainable however, the CPU will automatically clock down to 3.9GHz when instability is detected.
Cranking the FX-8150 up, we reached a 2.5 hr. Prime 95 stable overclock of 5GHz. Yes, the Holy Grail has been reached with the FX-8150 but we could not maintain all 8 cores fully “stable”. After toying around with multiple voltage configurations for hours, we achieved 4.8GHz with all eight cores. We will say, the gamer, overclocker and performance junkie will be very happy running four AMD cores at 5GHz. Temperatures peaked at 73 Celsius with 1.575 volts under stress. With LLC at high on the Crosshair Formula V, Vdroop brought the voltage down in CPUID to 1.524V.
As shown above, the stock speed is 3.6GHz.
Overclocking the Gigabyte 990FXA UD7 was like deja vu. 5GHz. 16MHz off the Crosshair V. One downside of the UD7, is no option in the bios to shut down cores. We had to manually disable cores through windows. Temps remained the same with the Gigabyte 990FXA-UD7 however, we noticed less vdroop with the board and Gigabyte has no LLC option in the bios. We found a same similiarity in oue 990FXA-UD5 review. Gigabyte boards have very little Vdroop and that is a plus.
Both the ASUS Crosshair Formula V and the Gigabyte 990FXA-UD7 are top shelf motherboards. The ASUS board is a bit more user friendly with its UEFI BIOS and comes with a few more bells and whistles, but both motherboards proved to be overclocking behemoths.
Lastly, the 920 All-in-One cooler was decent but not breathtaking. This watercooling solution will beat any air cooler period. We pumped 1.575V at 5 GHz and reached mid 80 Celsius temperatures within 15 minutes on a Prime95 run but at 1.525V, temps peaked at 70 and that is well below the max TJ of 90 on the FX-8150, If one desires a better cooling option than today’s aftermarket air cooling, the All-In-One is a solid choice not taking a lot of real estate inside your case.