ATI Radeon HD 4890: The RV790 Unveiled

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News Posted: Wed, Apr 1 2009 11:26 PM

As anyone remotely in tune with the tech sector can attest, the rivalry in the PC graphics card market between AMD / ATI and NVIDIA is as intense as ever. It used to be that one of the two companies would release a new product, only to have the other release a competing offering a few weeks, or maybe a few months later. But even in these gloomy economic times, AMD and NVIDIA continue to fight on and today both graphics giants are releasing new graphics cards aimed squarely at one another. Not a few weeks apart, but simultaneously on the very same day. Don't believe us? See here for our NVIDIA GeForce GTX 275 coverage.

AMD is rolling out the ATI Radeon HD 4890 today, technically a new graphics card, but one that borrows heavily from the previous generation. The Radeon HD 4890 is based on an updated variant of the popular RV770 GPU which powers Radeon HD 4850 and 4870 cards, dubbed the RV790. We've got some technical details regarding the RV790 GPU below and have more particulars regarding the actual cards and performance on the pages ahead. Read on to see what AMD has in store with the brand new Radeon HD 4890...

ATI Radeon HD 4890: The RV790 Unveiled

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rapid1 replied on Thu, Apr 2 2009 1:11 AM

I knew this was coming. I myself am even though an ATI GPU user not excited about this card itself. I am excited about the prices that will result from it's release. Both AMD/Nvidia will most likely start another price war at least to some extent, bringing prices for performance down further.

Also as per there previous actions in the GPU battle before the 3800 line they released a stand alone top end of the preceding ATI high end card (the XT2950 I think it was). Then a two or three months later they dropped the 3870/50 models. So this may be a pre cursor to some sense.

I am not saying I have any inside info on it. Thats just what I remember them doing a couple years back. I also find it funny this card is a 55nm card, just like there last one, but rumour had it they were going to 45nm for there next GPU set.

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While the power consumption numbers put the 4890 and 4870 in a similar league, we can say the 4890 runs much cooler than the 4870. Our Asus Radeon HD 4890 cards idled at under 50'C and peaked in the mid 80's under load. But where we noticed the biggest difference was when we removed the cards from the test system. After testing, the Radeon HD 4890 felt very warm to the touch when removing it from the test rig, but the Radeon HD 4870 was so much hotter, it was almost too hot to handle without giving it a few minutes to cool down. Not exactly a scientific data point, but something we wanted to mention nonetheless.
I can attest to how hot the 4870s get. This is a huge plus for the 4890.

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The pace of new hardware coming out is a bit overwhelming but thrilling to.Im nowhere near some of you guys ability on obtaining some of this but one way or another Im setting my goals to at least getting an i7 and a Asus board this summer and just go from there!Hopefully with a stimulas check Im suppose to get from my disability will get me started.Maybe the i7/920 and the new Asus p6 with ddr3.Ive got 2 cases one Im redoing and one fairly new one to put something in and cant wait!ITs like going to a toy store everyday when I sign on to HH and read up on all the new tech/TOYS.Hopefully this year will better than last.





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