How does OCing effect video

How does overclocking your system effect the video card?

If you overclock you system, and you increase the FSB speed, will that automatically OC the video card?
Do you have to OC the video card? How does OCing effect the video card?
What if you don't want to OC the video card, do you need a newer video card or can you use an old one?
6 answers Last reply
More about ocing effect video
  1. Intel 875P
  2. Well most of the new chipsets have the agp/pci bus locked at 66/33mhz so thats not really a concern anymore. But in general the mobo would run that bus on the 1:5 ratio so if your chipset does not lock that bus then more you jump the system clock then more you jump your bus. This will cause you AGP card and anything in the PCI slots to be overclocked and cause all sorts of system instability and cause hardware damage to the Graphic Cards and PCI cards. Make sure you keep the AGP/PCI bus at 66/33mhz and if your mobo has the option to adjust the ratio then utalize it to keep the bus stable..

    Barton 2500+ @ 2200mhz (10x220 vcore @ 1.8)
    Asus A7N8X Dlx 440 FSB
    1gb Geil GD pc3500 Dual Channel (2-3-3-6)
    Segata 80gb SATA 8.5ms seek
    ATI Radeon 9800 Pro(420/720)
  3. I hate unlocked AGP/PCI buses...my 3Dmrk2k1se score is down about a 7-8% since I turned my AGP bus speed up to 78MHz and tried to run a few games (I've turned it back down to 66MHz since). My Firewire card doesn't always recognize my external HDD anymore either, sometimes I need to restart...ugh.

    Maxtor disgraces the six letters that make Matrox.
  4. Does your system have a setting to specify PCI timer clock?

    Barton 2500+ @ 2200mhz (10x220 vcore @ 1.8)
    Asus A7N8X Dlx 440 FSB
    1gb Geil GD pc3500 Dual Channel (2-3-3-6)
    Segata 80gb SATA 8.5ms seek
    ATI Radeon 9800 Pro(420/720)
  5. Does that chipset have locked AGP/PCI buses?

    Barton 2500+ @ 2200mhz (10x220 vcore @ 1.8)
    Asus A7N8X Dlx 440 FSB
    1gb Geil GD pc3500 Dual Channel (2-3-3-6)
    Segata 80gb SATA 8.5ms seek
    ATI Radeon 9800 Pro(420/720)
  6. Nope...PCI = FSB/4 and AGP = FSB/2 no matter what. Pisses me off...

    Maxtor disgraces the six letters that make Matrox.
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