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4870x2 with a 4850

killersheep34

killersheep34

killersheep34

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Joined
3 Jan 2008
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182
Location
Devon, UK
I bought a 4870x2 a few months back to replace my 4850, which has since just been sitting in my drawer. I was wondering if it's worth chucking it in crossfire mode with the 4870x2, would I see any improvement? I'd need to buy an additional power cable for it, but just wondered what the overall opinion of it was.

Thanks guys.
 
on a DS4, isn't the second PCIe lane 4x?

If so, the 4850 would be pretty bandwidth bottlenecked.

Iirc, PCIe 4x is the same as full PCI - so anything above a 8600gt/9500gt/x1950 will be bandwidth limited.

Still, I can't see why you haven't just tried it yet :p
 
Yeah its not worth doing with a PCI-E slot at 4x, and not even worth it due to the memory, as if its a 512mb 4850, then thats what you would only have, as it goes by the card with the lowest amount, so you would lose all the x2's. :)
 
killersheep34 said:
I bought a 4870x2 a few months back to replace my 4850, which has since just been sitting in my drawer. I was wondering if it's worth chucking it in crossfire mode with the 4870x2, would I see any improvement? I'd need to buy an additional power cable for it, but just wondered what the overall opinion of it was.

Thanks guys.
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your 4870 will be throttled to the same speeds as your 4850. would be better if it was a 4870 1gb card. same speeds and same amount of memory ect. ;)
 
It WILL throttle the 4870s to the speed of the 4850, ive seen benchies from this exact setup when a friend of mine was doing it. Even so the 4x slot will kill the 4850 so its not worth doing just like everyone else said.

Hawker
 
hawker1986 said:
It WILL throttle the 4870s to the speed of the 4850, ive seen benchies from this exact setup when a friend of mine was doing it. Even so the 4x slot will kill the 4850 so its not worth doing just like everyone else said.

Hawker
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Benches does not mean throttled.
We are talking about clocks. the fact that the 4850 will hold back the 4870 in performance terms & that the 4X slots is no good is a different issue to throttling.

The FACTS are that the 4870 will run at its own clocks. unless you can show screen shots of the 4870 clocks dropping to 4850 speeds.

I have 4 older gen 3870 xfired cards & i can run them all at different speeds..
 
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Well Yes ok the clocks remain the same, but performance is what matters in the end surely., the 4870s will perform at the same as a 4850 is what I should have said. I do appologise

Hawker
 
hawker1986 said:
Well Yes ok the clocks remain the same, but performance is what matters in the end surely., the 4870s will perform at the same as a 4850 is what I should have said. I do apologise

Hawker
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Yes performance is what matters & he will basically get only the performance of 2 4850 if you was using a 4850 with a 4870, but the facts should be kept straight in regards to clocks nevertheless.

If i were him i would not bother, it would have to be another 4870 1GB, Oh & that 4X slot means i would not bother even with another 4870 1GB.

I think the word you were looking for is Bottleneck.
 
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