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  1. #1
    Benching Senior on Siesta
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    HD 4870 CF on P35 -- P45 --X48 Chipset - OCF Testing

    So there has been a lot of people asking about how much CF (Cross-Fire) on a pair of high end HD 4870's will be impacted by dual x4 , dual x 8 and dual x 16 PCI-e lanes.

    I will be starting to test just that late this week so we can see just how much the various chipsets and lanes impact and potentially bottleneck 4870 CF.

    System Spec:

    CPU : Q9650 (450 x 9)
    RAM : Crucial Ballistix D9 DDR2-1066, OCZ Platinum DDR3-1600
    GPU's : 2 x Visiontek HD4870

    Motherboards:

    GA-X48T-DQ6 - Intel X48 Chipset - Dual x 16 PCIe 2.0 slots

    ASUS Maximus II Formula - Intel P45 Chipset - dual x 8 PCIe 2.0 slots

    GIGABYTE GA-EP35-DS3P - Intel P35 Chipset - Dual x 4 PCIe slots

    CPU will be a 45nm quad.

    I will only run at 1680x1050 and 1920x1200 res and a couple of synthetic benchmarks and a few gaming benchmark, not too many as it takes too long to report on the results.
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  2. #2
    Member prime81's Avatar
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    You may add the X38 in there to see any differences between the 38 and 48series... I know you have a good x38 board.

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  3. #3
    Benching Senior on Siesta
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    Quote Originally Posted by prime81 View Post
    You may add the X38 in there to see any differences between the 38 and 48series... I know you have a good x38 board.
    The X38 and X48 both have dual x 16 so that will not show up to be different, remember I'm not testing CPU and RAM OC'ability, only CF performance

  4. #4
    Member Albuquerque's Avatar
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    Not only that, but the X48 and the X38 are the exact same chip minus some hand-picking by Intel. So whatever you find on the X48 will be identical to what you'll find on the X38...

    Go Brolloks, you tha man
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  5. #5
    Member prime81's Avatar
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    I'm just saying it would be interesting to see the differences, and no the x38 is not the same chip... same design but not same chip as it has more control options such as better tRD. Which when running superpi or cf configs would make a difference, but like I said would be interesting to see.

    http://www.anandtech.com/mb/showdoc.aspx?i=3208
    Last edited by prime81; 07-23-08 at 12:05 PM.

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  6. #6
    Member Albuquerque's Avatar
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    The X48 is absolutely nothing more than an X38 that has been "certified" for 1600FSB speeds. Even so, the X38 has every identical feature of the X48, to the point that a large quantity of the X38-motherboard owning public is entirely capable of flashing the X48 bios into their system (so long as the other hardware such as audio and nic remain the same)

    X48 has no new additional registers or settings, the only difference is that motherboard manufacturers had to offer something that their X38 didn't in order to justify the price. The result is a BIOS that shows a few more options, but those options were still present in the X38 even though the manufacturers chose not to previously show them.

    Edit: absolutely got censored somehow? Hmmm
    Last edited by Albuquerque; 07-23-08 at 12:13 PM.
    Sis 461 VLB-3.................................|.Gigabyte GA-X38-DS4
    AMD 486DX4 133 at 200Mhz 50FSB x 4 3.5v.......|.E8400 E0 3.0Ghz at 4.5Ghz 500FSB x 9 1.48v
    S3 864P 4mb VRAM VLB at 48/54 on 50mhz bus....|.2 x Sapphire 4850 512mb at 700/1100 PCIE 2.0 x16
    4 x 32mb HMC PC33 SIMM's50Mhz 2-1-1-3 at 3.3v.|.4 x 1Gb Crucial Ballistix D9GMH 1000Mhz 5-5-5-12 at 2.1v
    2 x Western Digital 4200RPM Caviar 4Gb ATA66..|.Samsung 7200RPM Spinpoint F1 750Gb SATA-II
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    4x CDRW PIO-1.........................|.Samsung 20x DVD+/-RW SATA
    Magic Color!

  7. #7
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    cool
    6470K 4.7ghz 1.28vcore - ek supreme block - asus z87-a, 7970 reference 1200mhz 5040x1050 eyefunity 120hz gaming, corsair 750w, watercooling, crucial m4 128gb, sennheiser headphones hd600 with asus essence stx, win 7 64 bit Home edit, ;)

  8. #8
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    Definitely looking forward to your results

  9. #9
    Senior Member jason4207's Avatar
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    Quote Originally Posted by Albuquerque View Post

    Edit: absolutely got censored somehow? Hmmm
    What got censored?
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  10. #10
    Member Albuquerque's Avatar
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    Quote Originally Posted by jason4207 View Post
    What got censored?
    The word "absolutely" is what got censored, seriously! I typoed it somehow in a way that made it bad, but I can't really figure out how. I really was going for "absolutely" versus something like abso-effing-lutely, honest I've tried typing it now like nine different ways and can't recreate it. Wierd...
    Sis 461 VLB-3.................................|.Gigabyte GA-X38-DS4
    AMD 486DX4 133 at 200Mhz 50FSB x 4 3.5v.......|.E8400 E0 3.0Ghz at 4.5Ghz 500FSB x 9 1.48v
    S3 864P 4mb VRAM VLB at 48/54 on 50mhz bus....|.2 x Sapphire 4850 512mb at 700/1100 PCIE 2.0 x16
    4 x 32mb HMC PC33 SIMM's50Mhz 2-1-1-3 at 3.3v.|.4 x 1Gb Crucial Ballistix D9GMH 1000Mhz 5-5-5-12 at 2.1v
    2 x Western Digital 4200RPM Caviar 4Gb ATA66..|.Samsung 7200RPM Spinpoint F1 750Gb SATA-II
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    Magic Color!

  11. #11
    Member IWasHungry's Avatar
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    Can't wait to see this!

  12. #12
    Benching Senior on Siesta
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    The two Visontek HD 4870's and Gigabyte GA-X48T-DQ6 (compliments of rdrash) arrived today, will be setting up the first leg of the comparisons on dual x16 lanes and a 45 nm quad at 4.25 Ghz, this is going to be fun

  13. #13
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    if the x48 and x38 are the exact same chip, how come there are differences in this 4850 test?

  14. #14
    Member Shiggity's Avatar
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    Quote Originally Posted by Brolloks View Post
    The two Visontek HD 4870's and Gigabyte GA-X48T-DQ6 (compliments of rdrash) arrived today, will be setting up the first leg of the comparisons on dual x16 lanes and a 45 nm quad at 4.25 Ghz, this is going to be fun


    Let's please start another thread for X38 vs X48 please. This is a Brolloks benching thread, no shinanigans.
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  15. #15
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    Quote Originally Posted by milomak View Post
    if the x48 and x38 are the exact same chip, how come there are differences in this 4850 test?
    Read the article again and you'll see that they (x48 & x38) are basically the same in performance clock for clock.
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  16. #16
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    Quote Originally Posted by HousERaT View Post
    Read the article again and you'll see that they (x48 & x38) are basically the same in performance clock for clock.
    So there are subtleties I have missed? I will go through it again.

  17. #17
    Member reznik's Avatar
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    X48 FTW

  18. #18
    Benching Senior on Siesta
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    Please note I'm comparing 4870 CF on a X48, P45 and P35 chip set to see what the impact of dual x 16 , dual x8 and dual x 8 is on the performance of the CF configuration, thanks

  19. #19
    Benching Senior on Siesta
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    First up :

    Gigabyte GA-X48T-DQ6 with duall HD 4870 and OCZ DDR3 1600.

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  20. #20
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    <---- begins to chant... benchies..... benchies ......benchies...we want benchies!!

    will be very excited to see your comparisons.
    Want to join the OCF Benchmarking Team? Click Here to find out how

    [HEATWARE:

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