PCI-E 2.0 variable performance in drivers

Discussion in 'Videocards - AMD Radeon Drivers Section' started by mbd2884, Oct 7, 2010.

  1. FDisk

    FDisk Master Guru

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    P45 should not have this problem, so you're good. The problem can appear only on P55, X58 chipset from what I heard.
     
  2. marashz

    marashz Member

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    Gigabyte P55A-UD3
    ATI 10.9a
     
  3. sjfwhite

    sjfwhite Member

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    Yep - Windows 7 Ultimate x64
     
  4. sjfwhite

    sjfwhite Member

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    So now you are getting way better numbers than I! LOL

    I am maxing out at just above 3GB/sec either way.

    EDIT: Nevermind - just ran it again with the latest intel chipset drivers and am getting 6GB/sec+ in both directions. All is good. :)
     
    Last edited: Oct 10, 2010

  5. mbd2884

    mbd2884 Banned

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    So that solves it then. It is a driver issue conflict with Intel Chipsets. So it seems 10.9a solved it.

    I also found out for mobile users, the Intel Chipset PCI-E 2.0 is limited at 2.5 gb/s

    So both mysteries solve :p
     
  6. TARNY

    TARNY Member Guru

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    happy you solved it.Im on win 7 64 and official ati 10.9 drivers.
     
  7. eMbAh

    eMbAh Active Member

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    This won't have an effect on games?
     
  8. RS-X

    RS-X Master Guru

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    Yse I do.
     
  9. eMbAh

    eMbAh Active Member

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    both 10.9 and 10.9a gives me 6 gb/s instead of 700 mb ^^ But what exactly does it mean?
     
  10. FDisk

    FDisk Master Guru

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    Woooooooohoohooou Dooouble Raaainbow....
     

  11. eMbAh

    eMbAh Active Member

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    i'm serious, can anybody tell me what it means? i'm using 10.3 right now, but with 10.9 and 10.10 I get a 6 Gb/s instead of .7 Gb/s, pretty significant difference, so I'm very curious
     
  12. FDisk

    FDisk Master Guru

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    6 or 7 Gb/s is ok.
    Anyway it only applies for applications that can use GPGPU.
     
  13. Kariddi

    Kariddi Active Member

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    I get awful performance in this test :(

    I have 2 x 5850 crossfired on catalyst 10.10 on linux (but I tried under Windows and 10.10a drivers and the situation is similar) and the results are these :

    [hades@artemis PCIeSpeedTest_v0.2]$ ./PCIeSpeedTest
    Devices found: 2

    ===> Testing device 0 <===
    Device type: Unknown
    Max resource 2D width/height: 16384/16384
    Total GPU memory size: 1024 MB
    Total CPU cached space size: 508 MB
    Total CPU uncached space size: 1788 MB
    GPU engine clock: 0 MHz
    GPU memory clock: 0 MHz
    Number of timing loops: 100
    [ 16 bytes] CPU->GPU= 400.000 KB/sec, GPU->CPU= 533.333 KB/sec
    [ 32 bytes] CPU->GPU= 1.600 MB/sec, GPU->CPU= 1.600 MB/sec
    [ 64 bytes] CPU->GPU= 1.067 MB/sec, GPU->CPU= 2.133 MB/sec
    [ 128 bytes] CPU->GPU= 6.400 MB/sec, GPU->CPU= 4.267 MB/sec
    [ 256 bytes] CPU->GPU= 5.120 MB/sec, GPU->CPU= 1.707 MB/sec
    [ 512 bytes] CPU->GPU= 17.067 MB/sec, GPU->CPU= 25.600 MB/sec
    [ 1024 bytes] CPU->GPU= 34.133 MB/sec, GPU->CPU= 51.200 MB/sec
    [ 2048 bytes] CPU->GPU= 29.257 MB/sec, GPU->CPU= 102.400 MB/sec
    [ 4096 bytes] CPU->GPU= 136.533 MB/sec, GPU->CPU= 204.800 MB/sec
    [ 8192 bytes] CPU->GPU= 409.600 MB/sec, GPU->CPU= 273.067 MB/sec
    [ 16384 bytes] CPU->GPU= 819.200 MB/sec, GPU->CPU= 819.200 MB/sec
    [ 32768 bytes] CPU->GPU= 1.092 GB/sec, GPU->CPU= 819.200 MB/sec
    [ 65536 bytes] CPU->GPU= 385.506 MB/sec, GPU->CPU= 728.178 MB/sec
    [ 131072 bytes] CPU->GPU= 2.185 GB/sec, GPU->CPU= 485.452 MB/sec
    [ 262144 bytes] CPU->GPU= 1.092 GB/sec, GPU->CPU= 624.152 MB/sec
    [ 524288 bytes] CPU->GPU= 2.497 GB/sec, GPU->CPU= 563.751 MB/sec
    [ 1048576 bytes] CPU->GPU= 2.140 GB/sec, GPU->CPU= 606.113 MB/sec
    [ 2097152 bytes] CPU->GPU= 2.411 GB/sec, GPU->CPU= 609.637 MB/sec
    [ 4194304 bytes] CPU->GPU= 2.527 GB/sec, GPU->CPU= 614.100 MB/sec
    [ 8388608 bytes] CPU->GPU= 2.581 GB/sec, GPU->CPU= 621.378 MB/sec
    [ 16777216 bytes] CPU->GPU= 2.617 GB/sec, GPU->CPU= 630.012 MB/sec
    ^C^C
    [hades@artemis PCIeSpeedTest_v0.2]$ ^C


    :(
     
  14. eMbAh

    eMbAh Active Member

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    Any examples of applications that does?
     
  15. FDisk

    FDisk Master Guru

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