If the specs are true, think about what this card is doing and what AMD has done:
5870 :
- 28 watts idle; 190 Watts load
- equivalent performance to a 4870 X2
- SINGLE die at 330 mm-squared with 2 billion transistors
- 850 MHz stock on single GPU
- 150 GB/s bandwidth on one GPU alone
- 40 nm process
AMD has done some kind of magic to make a single GPU perform at the same level as two GPUs of the previous generation all the while consuming less power at idle and load. They sacrificed the bandwidth though to achieve this.
When you compare this to the
4870 X2, you get the following:
- 420 to 430 Watts load
- 956 million transistors x2 (1.912 billion transistors total)
- 750 MHz (stock speed) per GPU
- 115 GB/s bandwidth x2 (so, pretty much 230 GB/s bandwidth?)
- 55 nm process
Imagine if you will...
5870 X2:
- 4 GB GDDR5 (2 GB per GPU, not shared of course)
- 850 MHz x2
- 150 GB/s bandwidth x2 (so maybe 300 GB/s total)
- roughly twice the load of a single of 5870, so maybe 190 W x2 = ~380 W total at load (?)
If there was an imaginary scale, could the following be true: (rough approximations, nothing more)
- Crossfire 4870 X2 = 5870 X2?
- 4870 X2 = 5870
- 4870 = 5850?
- 4850 = 5830?
- 4830 = 5770 (if this model exists...)?
You're looking at the roughly middle-end 5850 being the equivalent performance of a 4870. And, the low end 5830 at roughly where the 4850 would slot in for the HD 4000-series
.
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