New GPU...bad performance. Help please

So I installed new power supply, new rear case fan, new video card (went from a 4xxx to a 6850 Radeon HD) and things are acting slower. Seems like my computer is kinda chugging along at times instead of being smooth in games. DCUO was fine before, but with this videocard it kinda has texture popping and hitches. I have v-sync on and it is steady 30 sometimes, then dips to 20, then back to 30 and continuously doing that. I think TF2 got a little more sluggish, but I couldn’t tell that well.


Things I did in order

Uninstall videocard drivers/catalyst through add/remove programs
Took out old power supply and accidently took out the SATA cables, put sata cables back on HD’s (not sure if I connected them in the same ports as before, I have 2 HD’s)
Put in new power supply
Put in new video card
Connected everything
Booted up fine
Went to store, bought new rear case fan since my old one died
Hooked up case fan, closed case
Installed new drivers for video card from ATI website 11.1a (i think)


That’s it!
20 answers Last reply
More about performance please
  1. Well what are your pc's other specs? Are you sure it's not bottlenecking?
  2. I wouldnt think it would be bottlenecking if the old card had fine performance, the new one should be better


    GIGABYTE GA-EP43-UD3L LGA 775 Intel P43 ATX Intel Motherboard
    Intel Core 2 Duo E7400 Wolfdale 2.8GHz LGA 775 65W Dual-Core Desktop Processor BX80571E7400
    G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-4GBPQ

    The new power supply is OCZ 600W as well
  3. I'd double check the SATA ports you plugged into. Make sure it's the right ones, probably #1 and #2...
  4. well, i disconnected them from the HD's, not the motherboard. Maybe I will try switching the SATA ports on the hard drives
  5. Yeah you really shouldn't be having too much trouble with that. Recheck Sata ports, make sure your primary hard drive is in the #1 sata port.
  6. Ok, I will give that a shot when I get home from work. Any other ideas on what to try out?
  7. Would having the main HD on the 2nd SATA port cause a problem? I didnt think it would
  8. Run a full virus/malware scan? xD
  9. doubt it since the difference came when i changed the hardware, but ya never know!
  10. Uninstalled drivers/catalyst again
    Went into safe mode
    Used Driver Sweeper
    Rebooted
    Reinstalled drivers
    Same problem


    Switched the SATA cords around, computer wouldnt start up. Put it back to how it was, booted fine.
  11. Well can't rule out a defective card.

    Catalyst settings should be at default. In the gaming options, make sure everything is on "use application settings". At the bottom, check Triple Buffering and apply. Now try gaming. Also, you should try Vsync off as well, especially if you're under 60fps.
  12. Morphx2 said:
    well, i disconnected them from the HD's, not the motherboard. Maybe I will try switching the SATA ports on the hard drives


    If you got the SATA ports backward, then your boot drive would be on a port other than the one it needs to be on, and you wouldn't be able to boot :o
  13. wolfram23 said:
    Well can't rule out a defective card.

    Catalyst settings should be at default. In the gaming options, make sure everything is on "use application settings". At the bottom, check Triple Buffering and apply. Now try gaming. Also, you should try Vsync off as well, especially if you're under 60fps.



    Ill try those options after work. This is really annoying :\

    I am going to download the benchmark utility (I forget what it is called 3DMark or something) and run that to see what my score is.
  14. clarkjd said:
    If you got the SATA ports backward, then your boot drive would be on a port other than the one it needs to be on, and you wouldn't be able to boot :o

    Not unless one goes into BIOS and changes the SATA port that the PC boots from that's the beauty of SATA, the BOOT drive does not need to be on port #1.
  15. Mousemonkey said:
    Not unless one goes into BIOS and changes the SATA port that the PC boots from that's the beauty of SATA, the BOOT drive does not need to be on port #1.


    That's true...He didn't say that he changed the HD sequence in BIOS, though..
  16. clarkjd said:
    That's true...He didn't say that he changed the HD sequence in BIOS, though..

    No but it's what I would have done, because I'm too lazy to have bothered with powering down and opening up the case again. :whistle:
  17. thumb screws for the win :)
  18. Morphx2 said:
    thumb screws for the win :)

    Sitting on butt and drinking beer for the supreme victory! :sol:
  19. Another place suggested installing new chipset drivers...i guess i can try that later
  20. Yep chipset drivers, update the BIOS. You can try Driver Detective to find what in your system has updates available.
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