ATI Radeon 4870 HD X2

I just got a brand new computer and everything seems fine but the video card. Its a ATI Radeon HD 4870 X2 its working and the fan is moving but when I play a games like call of duty 2 or call of duty 4 it just gives off BAD FPS worse than my old computer. I've updated drivers have catalyst 8.12 installed but the FPS still isn't good only around 20FPS. Any suggestions or feedback would be greatly appreciated.

Power Supply 800 Watt -- Power Supply Quad SLI Ready

Processor Intel Core i7 Processor 940 (4x 2.93GHz/8MB L3 Cache

Motherboard EVGA X58 SLI Intel X58 Chipset CrossFire and SLI Supported w/7.1 Sound, Triple-Channel DDR3, Gb LAN, S-ATA Raid, USB 2.0, 3-Way SLI PCI-E MB 3-Way SLI

Memory 3 GB [1 GB X3] DDR3-1600 Triple Memory Module OCZ-Platinum or Major Brand

Video Card ATI Radeon HD 4870-X2 DDR5 2GB PCI-Express x16

Hard Drive 500 GB HARD DRIVE [Serial-ATA-II, 3Gb, 7200 RPM, 16M Cache

Sound Card Creative Lab Sound Blaster X-Fi Xtreme Audio

Operation System Microsoft Windows Vista Home Premium 32 bit
3 answers Last reply
More about radeon 4870
  1. 32bit os only allow for 4gb memory including the video card ram.
  2. It should definitely be higher than that. What do you get on 3dmark06 or 3dmark vantage?
  3. I was having a simillar issue , but it turned out to be a temp issue.
    I got a VGA block and maximized the settings in the ATI Overdrive.

    And the Frame rate was great. Got over 10000 PTS in 3DMARK Vantage.

    On the other hand , i am still having an antialiasing issue :S
    & cannot get to the bottom of it.
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