jmke

When you take the Cypress based Radeon HD 5870 and cut out 2 SIMDs and 15% of the clock speed to make a Radeon HD 5850, on paper you have a card 23% slower. In practice, that difference is only between 10% and 15% depending on the resolution. What’s not a theory is AMD’s pricing: they may have cut off 15% of the performance to make the 5850, but they have also cut the price by well more than 15%; 31% to be precise.


The result of this is clear: the 5870 is the fastest single-GPU card, and the 5850 is the value alternative. Couple that with the fact that it’s cooler running, quieter, shorter, and less power hungry, and you have a very interesting card. Design-wise the 5850 lets AMD get Cypress in to slightly smaller cases that can’t fit full 10.5” cards, something NVIDIA was never able to capitalize on with the reference GTX design (we actually had several comments on this; apparently a good number of people can’t fit 10.5” cards). The 5870/5850 situation ends up closely mirroring the 4870/4850 situation as a result; the 5870 is still the card to get when price (and size) is no object, but the 5850 is there to fill the gap if you won’t miss some of the performance.

http://www.anandtech.com/video/showdoc.aspx?i=3650&p=1

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jmke

Techpowerup got it right with their downclocked HD 5870, the HD 5850 is faster than the GTX 285
and can be found in stores at €200 vs €280 for GTX 285
AMD Radeon HD 5870 and HD 5850 Performance Chart

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jmke

http://hardocp.com/article/2009/09/3..._card_review/1
http://techreport.com/articles.x/17652/1

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