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AMD Radeon HD 6670 And 6570: Turkeys Or Turkish Delights?

Overclocking And CrossFire Benchmarks

The Radeon HD 6570 GDDR5 reference card is crippled by a 675 MHz clock limit in the Catalyst Control Center Overdrive panel. So, we use the MSI Afterburner overclocking tool to push things further. The card rewards our efforts with 845 MHz core and 1150 MHz memory overclocks. That’s a 195 MHz increase on the core, which is 45 MHz more than a stock Radeon HD 6670. Even more impressive is that this is the maximum core clock that Afterburner allows.

The Radeon HD 6670's Turks GPU is already clocked fairly high at 800 MHz. But we manage to push it to 940 MHz. The memory shares the same overclock as the Radeon HD 6570 GDDR5 at 1150 MHz.

In addition, we put these cards together in a CrossFire configuration. We wanted to run them both at stock Radeon HD 6670 specs. However, Afterburner crashes with both cards installed, so we lowered the Radeon HD 6670 clocks to simulate 6570 GDDR5 CrossFire performance:

With higher clocks, the Radeon HD 6570 passes stock Radeon HD 6670 performance. The overclocked Radeon HD 6670 shows a definite improvement, but can’t quite catch the GeForce GTS 450. Two Radeon HD 6570 GDDR5 cards in CrossFire perform surprisingly close to the Radeon HD 6790.

  • jenkem
    price aside, i'm rather impressed with the 6670. sure the 5750 and gts 450 are more powerful, but nvidia's card just looks ridiculous in the power draw graph. being the fastest card without a pci-e connector is more than just a title, the 6670 will become the new go-to card for people with dells, hps, and ect looking to upgrade to discrete graphics(like the 4670 and 5670 before it).
    also, a 5670 can be found on newegg for $73 before rebate.
    Reply
  • 4745454b
    With $99 after MIR 5770s on newegg, the GTS450, 5750, and 6670 are all to expensive. I am most impressed that AMD has got this level of performance out of
    Reply
  • Nintendork
    The card has great overclock:

    960Mhz+ / 5000+Mhz for the memory. A 21% increase in games (tpu review).
    Reply
  • fatkid35
    i used to play cod4 with a 3.0 ghz dual core and a radeon 4650 @ 1400x900 with good frame rates. and the whole pc only had a draw of 135 watts at the wall. this new 6670 is a kick @ss low power solution for most wanting to game on the semi cheap. kinda want one for my back up pc now.
    Reply
  • enzo matrix
    For $80, how can you beat a card that can overclock to 6670 speeds easily? And perform identically due to the same specs otherwise?
    Reply
  • enzo matrix
    ^The 6570, is this card I am referring to.
    Reply
  • Pengle
    How much better is the 6570 than the 4550
    Reply
  • jestersage
    great review!

    just wondering why we used a 1200w psu when most systems use only 10% of its capacity... i believe the power draw graphs are skewed due to lower efficiency at that load.
    Reply
  • sudeshc
    Another gr8 review just loved reading it.
    Reply
  • mognet
    jestersagegreat review!just wondering why we used a 1200w psu when most systems use only 10% of its capacity... i believe the power draw graphs are skewed due to lower efficiency at that load.
    Its just standard practise to overkill all other components to make sure they don't cause weird results. Besides the absolute draw isn't important its how the cards compare with each other.
    Reply