3 Replies Latest reply on Dec 22, 2014 1:33 PM by bsp2020

    fm2+ dual socket apu-support

    th3r0ck03

      hi all out there,

       

      i would like to know, if it's a good suggestion of the following thinkings.

       

      i thought about a dual fm2+-socket-board to raise gaming-performance with apu's.

      pros:

       

      - raise 2x4-core to 8 core

      - able to oc

      - crossfire with chipbuiltin-gpu

      - small cases are capable, cause there are no external graphic-cards

       

       

      cons:

      maybe the higher price of a dual-socket-board

       

      with this theoretical performance-boost it may be a good candidate as a steam-pc

      what do you think about my suggestion?

       

      your replies are welcome

        • Re: fm2+ dual socket apu-support
          Meteorhead

          Aside from the fact that this is more an idea rather than a question, I have thought of the same thing (and believe I have posted it earlier, but Jive is not that friendly when it comes to finding very old posts, even those made by me).

           

          I was looking for a good OpenCL devbox with performance enough for gaming as well, but keeping the price under 1000€. Also, having had an ASUS G73JH notebook, I grew fond of the dual cooling solution notebooks, and I would simply kill for a fully AMD based variant in a smaller form factor, such as the ASUS G46VW or the Lenovo Y40 (both 14" dual cooled laptop without optical drive (finally, a total waste of space nowdays)).

           

          The dual cooling solution offers itself for a totally symmetric design, and as th3r0ck03 has mentioned, dual-socket APU boards could help AMD make up for the lack in CPU power (although such design could only come into fruition by the time Zen arrives, which we know nothing of yet). 2 FX-7500 or 2 FX-7600P APUs with their total of 8 cores and 12-16 GCN compute units, would make a killer gaming rig and dev box. The APUs need be interonnected with some capable (presumably new) version of HyperTransport, that would be equally fast as the PCI-E 3.0 based new CrossFire technology (forgot the name). Having 2 sockets would help eliminate the memory bandwidth bottleneck due to having 4 instead of only 2 memory controllers, although some of the gain would certainly be lost on the interconnect.

           

          The reusability of such design would the multi-socket server boards, which eventually will have to arrive. We would not expect the 2 GPUs two be displayed as one, although it might seem reasonable to see 2 CPU devices in OpenCL in a multi-socket environment, even if the OS treats them as one (in some sense).

           

          The only problem I see, is that even if this idea would make it to the right people, we would never get any feedback on why AMD will not make such a design (because it sounds too good to be true). I am no engineer, so I cannot tell what the difficulties are. Furthermore, this idea might be somewhat late with stacked RAM just around the corner, which will provide bandwidth far greater than any HT interconnect yet. 2 APUs would have a hard time communicating with each other in a speed roughly 2 magnitudes slower, than raw stacked RAM speeds.