AMD has finally released the overclocking tool dedicated to its Spider platform last November presented. Called OverDrive utility that allows you to influence the frequency of each core Phenom processors. It allows you to edit the settings memory, display system temperatures and perform various benchmarks and varied, and stability tests. All is done in real time, without restarting the computer. The only problem, this utility is intended only to owners of cards accompanied AMD 790FX processors Phenom.
AMD Phenom (K10)
I am providing you reference of my processor AMD Phenom (K10). Look below for further detail on overclocking for AM2 Socket.
When AMD Phenom or Athlon II there are five different types of stroke:
- Reference clock
- Processor clock
- North Bridge clock (short NB-clock)
- HyperTransport link (in short: HT link)
- Memory Clock
The reference clock is with the Phenom just like the K8 in the normal state at 200 MHz and using the multiplier arises from the real processor speed. The North Bridge clock and the HT-Link will also be calculated by multiplying the reference clock. The memory clock is calculated as opposed to the K8 means of a ratio, also from the reference clock.
The North Bridge clock affects the performance of the system, as operated, for example, the L3 cache with this bar. Higher NB-stroke therefore means higher L3-stroke. The effect of a higher NB-bar on the performance of the processor depends greatly on the used application. Memory-intensive applications (e.g., pack / unpack it with WinRAR, some games benefit) is relatively strong, other applications (such as ray tracing with POV-Ray and Cinebench rendering) to benefit almost not at all. An overview of the performance change in a modified North Bridge clock receives the kind users in the review of the first Socket AM3 processors.
Take for example the current practice of AMD flagship Phenom X4 II 955 BE. This is operated with a clock speed of 3.2 GHz and a multiplier of 16. The clock rates are as follows:
- Reference Clock 200 MHz
- Processor clock = 200 x 16 = 3200 MHz
- North Bridge clock = 200 x 10 = 2,000 MHz
- HT link = 200 x 10 = 2,000 MHz
- Memory clock or DDR2-1066 DDR3-1333
Run CPUz to get more information on your processor. The North Bridge clock is calculated from 200 MHz reference clock with multi-10th The HT-Link is also calculated by Multi 10x200th.
The memory clock is calculated based on the reference clock with these conditions:
- DDR2-400: 1:1 (200 MHz reference clock, 200 MHz real memory clock)
- DDR2-533: 3:4 (200 MHz reference clock, 266 MHz real memory clock)
- DDR2-667: 3:5 (200 MHz reference clock, 333 MHz real memory clock)
- DDR2-800: 1:2 (200 MHz reference clock, 400 MHz real memory clock)
- DDR2-1066: 3:8 (200 MHz reference clock, 533 MHz real memory clock)
With the introduction of the Socket AM3 with DDR3 support were added following memory clock ratios:
- DDR3-800: 1:2 (200 MHz reference clock, 400 MHz real memory clock)
- DDR3-1066: 3:8 (200 MHz reference clock, 533 MHz real memory clock)
- DDR3-1333: 3:10 (200 MHz reference clock, 666 MHz real memory clock)
- DDR3-1600: 1:4 (200 MHz reference clock, 800 MHz real memory clock)
There are some restrictions exist with respect to the memory assembly. DDR2-1066, for example, is only supported when used per channel bars. If used with four bars, DDR2-1066 is not officially scheduled, and is therefore - as so often when overclocking - to pure luck. The same is true with DDR3 RAM. Here, too, DDR3-1333 is no longer officially supported, instead, will use DDR3-1066. DDR3-1600 is offered in the BIOS but, while many boards, but is seen as a pure overclocking profile and is supported by AMD in any constellation.
While the Athlon 64 (AM2) because of the complicated calculation, not every memory clock was possible for each processor speed and memory had to be so partially operated far below the specification (especially users of processors with odd or half multipliers can tell you a little song), has this picture changed dramatically. Because the memory clock is derived from the reference clock, each processor cycle and the full memory clock is possible. The processor multiplier plays no role.
As you see, is the direct influence of the real clock speed is not possible. It only changed the fundamentals of the corresponding clock speeds, by changing either the reference clock multiplier, or the equivalent, or the ratio.
Bookmarks