ASUS Radeon HD 5770 1GB Voltage Tweak Edition Review

A Look at the ATI 5000-series

As you can probably tell by the chart above, all of the HD 5000-series fit perfectly into ATI’s current lineup. In essence, The HD 5870 takes the place of the expensive-to-produce and comparably inefficient dual GPU HD 4870X2 as the top dog for the time being. Judging from paper specifications alone, the HD 5870 is a technological marvel considering it packs all of the rendering potential of ATI’s past flagship card and then some while not being saddled by an inefficient dual processor design. The fact that this new card could trump the performance of a HD 4890 just a few months after that card’s release is nothing short of stunning.


The HD 5850 on the other hand looks to be the purebred price / performance leader of the new ATI lineup. Barring slightly lower clock speeds for both the core and memory along with eight disabled texture units (totalling 160 stream processors), it is basically a clone of the HD 5870. This is the card ATI hopes will compete directly with the GTX 285 for the near future and then come into its own when DX11 games make their way into the market. We believe this card will appeal to the majority of early adopters since it allows them to buy class-leading DX9 and DX10 performance now without gambling $400 on unproven DX11 potential.

We can also see that ATI did some careful price cutting prior to launch since even though the HD 4890 looks to offer significantly less performance than a HD 5850, it is actually priced accordingly. As such, this previously high end card will stick around for the next few months in the $200 price bracket but that isn’t to say that it will stay there indefinitely...


In short order, ATI will have a full range of DX11 cards on the market; all of which have been talked about in rumours over the last quarter. To begin with we will see the two “Cypress” series cards which are the HD 5870 and HD 5850 followed before the new year by the dual GPU Hemlock card which will make use of two Cypress processors. The Hemlock sticks to ATI’s mantra of never releasing a card that retails for above $500 but it will nonetheless take over the premier position of this DX11 lineup.

Meanwhile, we now have the HD 5700-series of code-named Juniper cards as well with the HD 5770 and HD 5750. The HD 5770 1GB is one of the first sub-$200 cards which will come stock with a 1GB framebuffer and along with the GDDR5 memory, comes with some hefty clock speeds as well. However, even though upon first glance the HD 5770 looks like it can compete with the HD 4890, this isn’t the case. According to ATI, the 128-bit memory interface will limit this card’s performance so it lies right within its stated price range. We should also mention that ATI won’t be replacing the HD 4890 until at least the first quarter of 2010 even though the HD 5770 is looking to take over from the HD 4850.

The HD 5750 on the other hand is simply a cut down HD 5770 with lower clocks, less SPs and a cut down number of Texture Units. It is this card that ATI sees going head to head with the NVIDIA GTS 250 and 9800 GT. It uses GDDR5 memory but there will be both 512MB and 1GB versions released to cater to the $100 market along with those looking for a little jump in performance.

So there you have it. In the high stakes game of poker that is the GPU industry, ATI has shown its hand. All that is left is for the competition to respond.