|AMD Phenom II X4 Test Settings|
AMD Phenom II X4 955 3.2 GHz
3.86 GHz, (19x 203 MHz), 1.45V
DDR3-1333 CAS 9-9-9-24, 1.50V
DDR3-1624 CAS 6-6-5-18, 1.65V
MSI 790FX-GD70 Socket AM3, 790FX/SB750, BIOS 1.3 (04/27/2009)
Zotac GeForce GTX260²
Western Digital VelociRaptor WD30000HLFS
Integrated HD Audio
Integrated Gigabit LAN
Microsoft Windows Vista Ultimate x64 SP1
GeForce 182.08 Desktop
The X4 955’s 21% overclock probably isn't going to bowl anyone over, but its 3.86 GHz final speed is still well above average for an air-cooled Phenom II system, thanks to the good performance of Rosewill’s Fort 120 cooler.
Sandra shows a 19% improvement in Arithmetic and 20% improvement in Multimedia extensions performance.
Though memory data rate and timings were altered significantly, its performance improved by only 1%. The X4 955 has better base bandwidth than the X2, but apparently less room for improvement.
Power consumption increased by 31%, mostly because of the higher voltage required to reach this high clock speed.
An average CPU performance increase of 20% and an average power increase of 31% caused the overclocked Phenom II X4 to lose around 8% of its original efficiency. Once again, it would likely have been possible to actually increase efficiency by overclocking at or near stock voltage, but the maximum speed increase would have been much smaller. For more on increasing the efficiency of your Phenom II overclock, check out this piece.
- Why Overclock?
- Understanding The Lingo
- Getting Started, The Hardware
- Keeping It Cool
- More Shared Hardware
- Overclocking AMD's Phenom II X2 550
- Phenom II X2 550 O/C Performance And Efficiency
- Overclocking AMD's Phenom II X4 955
- Phenom II X4 955 O/C Performance And Efficiency
- Overclocking Intel's Pentium E5200
- Pentium E5200 O/C Performance And Efficiency
- Overclocking Intel's Core 2 Quad Q8200
- Core 2 Quad Q8200 O/C Performance And Efficiency