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Thread: Just a small question...

  1. #1
    Join Date
    Jul 2003


    Hello All,

    I've noticed when you guys overclock your VC's, you give the mhz ratings.

    But whats the second one mean?
    (example: 390/640)

    I know the 1st one is the core clock speed, but if the second one is memory how come its so high? My Radeon 9800 NP is OC'd at 414mhz core and 310.5mhz mem.

    Is it because its DDR mem and you 2x the mem clock?

    Just want to know. :shrug:


    Athlon XP 2700 (2.2GHz)
    420 w PSU
    ASUS A7V8X-X
    1024 mb Kingston PC 2700 333 fsb
    Radeon 9800 128 mb (w Antec Iceberq and Tweakmaster ramsinks OC +28% at 420/621)
    Pioneer DVD-Rom (Slot)
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    And a Magnovox 27" Television (Yes a freakin' TV!!!!!!)

  2. #2
    Join Date
    Jul 2002


    p.boy: It's the effective rate which in your case would be 621MHz.

  3. #3
    Join Date
    Sep 2003


    the memory is ddr...which means double data rate so double that # youve got...i think
    ASUS P4S800 motherboard
    P4 2.4ghz 800mhz fsb HT @ 2.84
    geiL 512 PC3200 RAM
    80GB 7200RPM HDD
    PowerColor Radeon 9600XT
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  4. #4
    Join Date
    Aug 2002
    Quebec, Canada


    Quote Originally Posted by dude281
    the memory is ddr...which means double data rate so double that # youve got...i think
    Your video card for example would be : 310.5mhz (x2) = 621MHz. as weta said in his post.
    SPAM Special Ops

  5. #5
    Join Date
    Aug 2003


    Nvidia likes to post big numbers so they show the DDR or Double Data Rate, while ATI usually shows the clock frequency (mhz).

    Just double it.

    For example, mine is 900, but the real frequency is 450mhz.

    FX5900 - 3DMark2001 [20,566] - 3DMark2003 [7,281] - Aquamark3 [56,694]
    Ti4400 - 3DMark2001 [16,028]

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