Promise IDE/Intel IDE comparison - PATA - P4C800E-Deluxe

Discussion in 'Asus' started by Noozer, Jan 16, 2004.

  1. Noozer

    Noozer Guest

    I ran some bencmarks earlier with Sandra 2004 against my hard drive. I was
    pretty shocked with the difference. Since I'm waiting for the download of
    the Suse 9 Live Eval and MandrakeMove 9.2 Linux CD's I thought I'd post the
    results here.

    - P4 2.6Ghz running 3.2Ghz
    - 512meg DDR533 memory @ 1:1
    - Maxtor 6Y080L0 PATA drive (80gig 2meg cache)
    - ATI 9600XT video card

    I ran the benchmark once using the Windows cache, then twice without the
    cache. Then I shut down, moved the IDE cable from the PROMISE PATA connector
    to the standard Primary IDE connector and rand the same tests. Here are the

    Windows Disk Cache Used : Yes | No | No
    Benchmark Breakdown
    Buffered Read : 733 MB/s | 1273 MB/s | 1200 MB/s
    Sequential Read : 26 MB/s | 33 MB/s | 33 MB/s
    Random Read : 8 MB/s | 6MB/s | 6MB/s
    Buffered Write : 529 MB/s | 1141 MB/s | 1200MB/s
    Sequential Write : 18 MB/s | 34 MB/s | 34MB/s
    Random Write : 7 MB/s | 9 MB/s | 9MB/s
    Average Access Time : 6 ms | 9 ms | 9ms (estimated)

    Windows Disk Cache Used : Yes | No | No
    Benchmark Breakdown
    Buffered Read : 67 MB/s | 70MB/s | 83MB/s
    Sequential Read : 19 MB/s | 30MB/s | 36MB/s
    Random Read : 8 MB/s | 5MB/s | 6MB/s
    Buffered Write : 73 MB/s | 74 MB/s | 74MB/s
    Sequential Write : 30 MB/s | 35MB/s | 37MB/s
    Random Write : 3284 kB/s | 7MB/s | 8MB/s
    Average Access Time : 5 ms | 10ms | 10ms (estimated)

    Notice the HUGE differences in buffered read/write times!!!! Guess the
    drive is going to stay on the Promise controller.
    Noozer, Jan 16, 2004
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  2. Noozer

    JJLKJ Guest

    Do you have any idea what you are talking about? Did you even look at those
    benchmark results? First of all I have run benchmarks on the same board, on
    both controllers, and performance is nearly identical, both with and without
    raid, definitely nothing that you would probably notice in every day use.
    Second, the benchmarks you have for the Promise controller are not even
    remotely possible. 1200MB/s reads and writes? You do realize that your
    drive has a "theoretical" max of about 100-133MB/s depending on the model,
    and that you will never even achieve close to that in a non-raid setup.
    Usually you will get around 80% of the theoretical, or at least in that
    ballpark. Considering you got about 1000% of the theoretical max, I think
    you must be doing something very wrong!!!
    JJLKJ, Jan 17, 2004
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  3. Noozer

    kony Guest

    The buffered read/write scores are basically determined by the speed
    of the memory, amount of cache, not the HDD's sustained throughput.

    Even so, there was something wrong with the Intel controller, it
    should actually score slightly higher than the promise card given same
    ATA rate and integrated into southbridge.
    kony, Jan 17, 2004
  4. Noozer

    Noozer Guest

    I don't know... Do you know what you're talking about?
    I booted the PC, ran the benchmark and pasted the results to notepad and
    saved the file. Then I shut down, moved the IDE cable to a different
    connector on the mainboard, booted and did the exact same thing. I just
    tried again and still see similar numbers.

    Kinds hard to screw up, don'tcha think?

    The whole reason I posted is that I *DON'T* understand why there would be
    such a difference. I'd be glad to know why the numbers are so different.

    Noozer, Jan 17, 2004
  5. Noozer

    stacey Guest

    Benchmark software is screwy. BTW looks like as far as real throughput, the
    intel controller is faster.
    stacey, Jan 17, 2004
  6. Noozer

    JJLKJ Guest

    The buffered read/writes are still limited by disk speed. You won't exceed
    the capability of the drive period. I have seen mention of the benchmark
    giving unusually high results on Windows 2000, without SP2, although I
    haven't seen how unusually high they were talking. Maybe there's something
    else going on, but I can guarantee the 1200MB/s buffered read/writes are not
    "real" results. It should be obvious that the 1200MB/s benchmark is a bad
    reading for whatever reason. Believe me, you wouldn't have been the first
    to discover that the Promise controller performed more than 10 times better
    than the Intel. Like I said, I ran the benchmarks and the readings come out
    just like they should, well under the theoretical max of the drive speed.
    I've never run a Sisoft Sandra Benchmark, on ver. 2002-2004, where the
    buffered read/writes exceeded what the disk could do. My point is not that
    you made a mistake, but that for some reason the benchmark obviously is
    giving a false reading on your system. Just didn't want you to committ to
    the promise controller based on that benchmark, or spread the word to other
    readers that the promise controller is much better, when in fact it is very
    similar in performance to the Intel.

    I actually stick with the Intel controller because I know I will always be
    able to get updated drivers from Intel, and Intel chipset support is always
    good in Linux too. When you have an onboard controller from a third party,
    it often becomes a problem in the future. You often end up not being able
    to use a driver or controller bios from the chip manufacturer, but having to
    wait for an update from the motherboard manufacturer. In almost every case
    I have ever seen, the motherboard manufacturer stops providing updates, long
    before the chip manufacturer does.
    JJLKJ, Jan 18, 2004
  7. Noozer

    Mark Guest

    Just a suggestion. Usenet posts are traditionally and still most often
    done with a non-proportional type font. Outleak, among its many other
    issues, defaults to the wrong type. So your pasted results are not
    aligned very well.

    As to the drive differences, I looked at the random reads/writes. In
    that case, they are almost identical. But you really should look for
    better HD benchmark software. The name of one escapes me at the moment,
    but it is used specifically for testing drives. I believe I read about
    it over at AnandTech.
    Mark, Jan 18, 2004
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