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HD7870 upgrade bottleneck?

Tags:
  • Performance
  • Bottleneck
  • Boost
  • Games
  • Graphics
Last response: in Graphics & Displays
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December 26, 2013 1:36:44 PM

Hello, I bought an HD7870 in hopes of getting a slight performance boost in games over my GTX 260. It was only about $120 after rebates so it seemed like a solid deal in my book.

Anyways, after installing it, uninstalling all of the 260's drivers and then installing the catalyst drivers- I set it up to the default graphics overdrive (1100 MHz GPU clock and 1200 MHz Memory Clock). On paper, the 7870 should be better in every aspect than the 260 as far as I understand, but when I launched CS:GO on the same graphical settings as I had prior, I noticed about a 10-20 FPS drop.

I assume that I have some bottlenecking issues, which I honestly expected. However, I didn't expect a decrease in performance.. that just doesn't make much sense to me :\

Processor: Intel Q8300 @ 2.5 GHz
RAM: 6 GB
OS: Windows 7 64 sp1
Power Supply: 650 W

I searched through a handful of posts on the same card but I don't think anyone's problem matched up all that well with mine.

Thanks

More about : hd7870 upgrade bottleneck

Best solution

December 26, 2013 1:53:30 PM

Since you are moving from an nVidia card to an AMD card it is possible that the Catalyst drivers do not perform as well in this game.
Also, you may still have bits of the nVidia drivers still hanging around, a fresh installation of Windows (or other operating system) is the best way to ensure there are no old registry entries causing conflicts. Granted reinstalling your operating system is somewhat of a burden; as such your second best bet is to boot into "safe mode" and run a driver remover program, there are several freeware solutions that are easily located on Google.

Hope that helps.
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