AMD Zen PCIe lanes

Discussion in 'Processors and motherboards AMD' started by Dburgo, Nov 7, 2016.

  1. Dburgo

    Dburgo Guest

    Anyone know any numbers? I have not been able to find any "proof in the pudding" regarding what the enthusiast level cpus can do besides full x16 gen 3.0 x2 performance. I also read recently that those numbers might be the cap, and if additional lanes are needed, mobo manufacturers can offer more lanes at additional cost with a PLX chip.

    Here is the only info I have found and the source is a website that 3DGPU will not link too.

    "AMD has mentioned two full x16 (Gen3) lanes for GPUs. AIBs can add additional lanes through a PLX chip but that would add to the cost. X370 features full overclocking support with a very sophisticated GUI that will allow the best overclock tools and experiences. Since all AM4 CPUs have an unlocked multiplier, record breakers will definitely put X370 boards to the test on liquid and LN2 setups."
     
    Last edited by a moderator: Nov 7, 2016
  2. sykozis

    sykozis Ancient Guru

    Messages:
    22,492
    Likes Received:
    1,537
    GPU:
    Asus RX6700XT
    Why does it matter? According to your specs, you have an i7 6800K. Wouldn't make any sense for you to switch to Zen.
     
  3. os2wiz

    os2wiz Guest

    Messages:
    1
    Likes Received:
    0
    GPU:
    Gigabyte Radeon HD 6950
    Unless he wants the multithreading of 8 cores. 6800K is only 6 cores. Otherwise there would not be any reason to switch.
     
  4. sykozis

    sykozis Ancient Guru

    Messages:
    22,492
    Likes Received:
    1,537
    GPU:
    Asus RX6700XT
    Without having any factual performance data, there's no reason to even be considering switching at this point. At this point, we have no idea how Zen will actually perform....
     

  5. BLEH!

    BLEH! Ancient Guru

    Messages:
    6,402
    Likes Received:
    421
    GPU:
    Sapphire Fury
    I think Zen is getting 32 lanes (2 x 16) for GFX, then probably another 4 for the SB and maybe 4 spare, so up to 40???
     
  6. Dburgo

    Dburgo Guest

    Well, if it was 40 lanes max and a mobo could offer me more lanes, that at least would be better than Intel's current offering with a max of 40 lanes on 6850k or higher tier cpus with what I believe no option for additional lanes. They could really leverage some market share if they opened up this 40 lane cap we have limiting really robust speed machines with more than basic functionality. NVMe is fast but it doesnt have large capacities..
     
  7. -Tj-

    -Tj- Ancient Guru

    Messages:
    18,097
    Likes Received:
    2,603
    GPU:
    3080TI iChill Black
    well if you bought a bit more HQ mobo you could have extra pcie lanes via PLX, this is what my mobo has..
     
  8. BLEH!

    BLEH! Ancient Guru

    Messages:
    6,402
    Likes Received:
    421
    GPU:
    Sapphire Fury
    X58 w/7 PICE slots, 2 x NF200. Same thing, BUT RETRO :D
     
  9. -Tj-

    -Tj- Ancient Guru

    Messages:
    18,097
    Likes Received:
    2,603
    GPU:
    3080TI iChill Black
    Yeah.


    Just checked his X99A "budget" model and it has this

    40-Lane CPU-
    3 x PCIe 3.0/2.0 x16 (x16 or x16/x16, x8/x16/x8) *1

    28-Lane CPU-
    3 x PCIe 3.0/2.0 x16 (x16, x16/x8, x8/x8/x8) *2
    1 x PCIe 2.0 x16 (x4 mode) *3
    2 x PCIe 2.0 x1 (x1 mode) *3



    Deluxe has this

    40-Lane CPU-
    4 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8, x8/x8/x8/x8) *1
    1 x PCIe 2.0 x16 (x1 mode)
    1 x PCIe 2.0 x16 (max at x4 mode) *3
    1 x PCIe 2.0 x1

    28-Lane CPU-
    3 x PCIe 3.0/2.0 x16 (x16, x16/x8, x8/x8/x8) *2
    1 x PCIe 2.0 x16
    1 x PCIe 2.0 x16 (max at x4 mode) *3
    1 x PCIe 2.0 x1


    Clearly a difference :nerd:
     
  10. sykozis

    sykozis Ancient Guru

    Messages:
    22,492
    Likes Received:
    1,537
    GPU:
    Asus RX6700XT
    If you're running NVidia cards, there's nothing wrong with NF200 to gain PCIe lanes

    But until accurate performance data is available, there's no reason to consider switching to Zen. If Zen is noticeably slower than the 6800K, it wouldn't make sense to switch, even for extra PCIe lanes...
     

  11. mohiuddin

    mohiuddin Maha Guru

    Messages:
    1,007
    Likes Received:
    206
    GPU:
    GTX670 4gb ll RX480 8gb
    May he switch to red team for the sake of humanity.... :p
     
  12. BLEH!

    BLEH! Ancient Guru

    Messages:
    6,402
    Likes Received:
    421
    GPU:
    Sapphire Fury
    Nope, still on AMD, and then only a single GPU. Had CFX 7970s in the past, however, worked fine then.

    Hell no, I like my Fury.

    I'm still in X58 as none of the current chipsets are really a worthwhile upgrade for the money investment. Let's see if Zen changes that.
     
  13. -Tj-

    -Tj- Ancient Guru

    Messages:
    18,097
    Likes Received:
    2,603
    GPU:
    3080TI iChill Black
    Apparently early ES were able to OC 3.8 later 4.2, but its still full of errata atm, 30% slower perf., final product could be 4.5 -4.6Ghz chip at Haswell-E/Broadwell-E perf.
     

Share This Page