Skip to main content

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

Technology III - Virtualisation, L3-Cache, HTT 3.0

The virtualisation functionality integrated in the Phenom processor has also received a notable performance boost . Now, operating systems in virtual environments can interact directly with the hypervisor, the management software for virtual machines. This reduces the switching times between the hypervisor and the virtual machines.

This functionality is already found in the Barcelona-based Opteron processors of the server segment. Since both processors, i.e. the Phenom and the new Opteron, use the same core design, this function can now be used on the desktop without limitation as well.

L3 Cache

As a result of AMD's decision to use a single-die design for its quad-core processor, the chipmaker is able to let all four cores share a common L3 cache. In other words, AMD is implementing an L3 cache. Each of the four processor cores possesses its own 512 kB L2 cache. Additionally, all cores have access to the same data pool through the 2 MB of L3 cache . This leads to an additional increase in performance.

Additionally, the L3 cache acts as a write buffer for the system memory, which also brings a small performance increase with it.

Unlike the Athlon 64 X2, the Phenom processor no longer uses the Hypertransport 2.0 interface. Instead, AMD pairs it with the faster Hypertransport 3.0 , which increases the available bandwidth to 20.8 GB/s and can result in better 3D performance. This is an especially important factor when a multi-card Crossfire setup is used.

Hypertransport versions and their respective bandwidths:

  • Version 1.0: 6.4 GB/s, 1600 MHz
  • Version 2.0: 8.0 GB/s, 2000 MHz
  • Version 3.0: 20.8 GB/s, 3600 MHz

Since the Hypertransport protocol is downward compatible, users will be able to plug the Phenom into older AM2 socket boards as well as the new AM2+ generation.

Tom's Hardware News Team
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 :)
    Reply
  • 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.
    Reply