Phenom 9700, AMD's 1st Quad-Core CPU

Cool'n'Quiet 2.0

With the introduction of Cool'n'Quiet 2.0 , AMD is taking power saving a step further than Intel's SpeedStep. Each CPU core is able to reduce its frequency if its full computing power is not needed. In this power saving mode, each core can run as low as 1200 MHz when idle.

This is a change compared to the Athlon 64, which was able to run as low as 1000 MHz using a 5x multiplier. Phenom, on the other hand, uses 6x as its minimum multiplier, making the lowest idle frequency 1200 MHz. The reason for this behavior can be found in the Hypertransport 3.0 interface. It runs at a frequency of 1200 MHz, and the processor's speed cannot be lower than the Hypertransport speed.

Since the CPU is downward compatible, it should be possible to revert to Hypertransport 2.0 or 1.0 in order to achieve an idle (power-saving) frequency of 1000 MHz or 800 MHz, respectively. Sadly, we didn't find such an option in the BIOS. Perhaps a resourceful enthusiast or programmer will write a clever tool on his or her own that enables this on-the-fly switching...?

Tom's Hardware News Team

Tom's Hardware's dedicated news crew consists of both freelancers and staff with decades of experience reporting on the latest developments in CPUs, GPUs, super computing, Raspberry Pis and more.

  • spearhead
    good review but you should have had included more result of the overclocked phenom. i just want to know how much juce i you can push out of it for me it is a must it beats the 6400+ otherwise its not worth purchasing in my opinion, it just has to beat its older generation when its running at same clocks.that is why amd has to work on its clock speed and cache. hopefully deneb will be out soon. i would also realy appriciate it to see some review about the phenom 9850 black edition compared against both the 6000+ 6400+ and q6600 and q9300 and maybe some e8xxx model. with overclocked results. pushed it to the maximum. would be realy cool hehe :)
  • haifen
    The SB700 does indeed support at least one PATA port as my motherboard has an IDE connector and I can use it with the ATIIXP PATA driver.