Can a 4830 crossfire with a 4870?

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ChaosDimension

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Hey guys I was impatient about buying a videocard and didn't wait for deals so I went ahead and bought a powercolor 4830 vid card.

Now this stupid Asus 4870 went on sale for $104 so i bit since I was planning to cf another 4830 with it anyway.

What I'm wondering is will a 4830 cf with a 4870, if it can, I know it will downclock to 4830 speeds but I'm also wondering if I can bios change the 4830 to 800/935 and it'll have the same clocks as the 4870 and the only thing disabling a true cf setup is the 160 stream processors missing from the 4830.

Is that possible? I know theres also the gddr3 vs the gddr5 but I don't really care about that as I game on 1920x1200.

Thanks guys.
 
Or I also have the option of selling the powercolor 4830 and just sticking with the 4870 since it can hold its own. What do you guys think?

(who wants to buy a 4830? :p)
 
Yes they should be able to be paired up together.

EDIT: What do I think... Maybe you should experiment the crossfire before you decide what to do with the 4830.
 
I'm not sure it would be worth it, you should probably sell one of the cards. Yeah you can overclock the 4830, but you can overclock the 4870 too...
 
the only problem is that the 4870 will only work as fast as the 4830 so its like having 2 4830s in cf

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ALL4AMD said:
the only problem is that the 4870 will only work as fast as the 4830 so its like having 2 4830s in cf

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Click to expand...

No, this isn't NVIDIA. ATI works differently. When you add another card... it ADDS to the existing performance.

Bakku said:
single 4870 > 2x4830s?
Click to expand...

Maybe but I don't really think so. Two 48 30's should be faster than one 4870.
 
I'm in a similar situation and will be finding out Friday how well a 4870 CF's with a 4850. Gotta love getting a 4870 for $113!!
 
ChaosDimension said:
Hey guys I was impatient about buying a videocard and didn't wait for deals so I went ahead and bought a powercolor 4830 vid card.

Now this stupid Asus 4870 went on sale for $104 so i bit since I was planning to cf another 4830 with it anyway.

What I'm wondering is will a 4830 cf with a 4870, if it can, I know it will downclock to 4830 speeds but I'm also wondering if I can bios change the 4830 to 800/935 and it'll have the same clocks as the 4870 and the only thing disabling a true cf setup is the 160 stream processors missing from the 4830.

Is that possible? I know theres also the gddr3 vs the gddr5 but I don't really care about that as I game on 1920x1200.

Thanks guys.
Click to expand...

When you mix and match cards, both are capped at the performance of the lesser. If you add a 4830 your 4870 will start acting like a 4830. It would be no different than having two 4830s in CF.


Sell the 4830. I don't think that 2x4830 would beat a 4870.
 
I agree with the others that you should sell the 4830 because at 1920 x 1200 you're gonig to want all the power you can get.
 
ALL4AMD there is no mention of the 4830 in the link you posted.

Its funny when the card was first introduced overseas they had a review along with a 4830 crossfired with a 4850 and a 4870 and compared that to the others crossfired together.
All of that is no where to be found now.
VERY FUNNY
 
You can crossfire the 4830 with a 4870, but the 4870 will slow down to the 4830's speeds, from what I've read in the past.
 
sparks said:
ALL4AMD there is no mention of the 4830 in the link you posted.

Its funny when the card was first introduced overseas they had a review along with a 4830 crossfired with a 4850 and a 4870 and compared that to the others crossfired together.
All of that is no where to be found now.
VERY FUNNY
Click to expand...


If you could interpret charts/data the solution is right at hand. 2 4850's in CF are basically running only slightly faster than a SINGLE 4870 1GB card (or even a 512). It would be safe to assume that two 4830's would provide less performance.

Only COD4, which has almost near perfect CF scaling shows a very solid difference.
 
Stanley Pain said:
If you could interpret charts/data the solution is right at hand. 2 4850's in CF are basically running only slightly faster than a SINGLE 4870 1GB card (or even a 512). It would be safe to assume that two 4830's would provide less performance.

Only COD4, which has almost near perfect CF scaling shows a very solid difference.
Click to expand...

not only that, but a 4830 is really just an underclocked 4850.
 
Stanley Pain said:
If you could interpret charts/data the solution is right at hand. 2 4850's in CF are basically running only slightly faster than a SINGLE 4870 1GB card (or even a 512). It would be safe to assume that two 4830's would provide less performance.

Only COD4, which has almost near perfect CF scaling shows a very solid difference.
Click to expand...

F.E.A.R 2 probably would, too.
 
Is this their hybrid crossfire? I was wondering how that worked. Do both cards split the load 50/50 or can the faster card do 70% of the work and the 4830 handle 30%?
 
4830s aren't that slow like everyones saying. With just some overclocking it would be like the 4850s.
 
the crossfire of a 4830 and a 4850 and 4870 showed it a little faster than 2 4830's
not sure why
 
sparks said:
the crossfire of a 4830 and a 4850 and 4870 showed it a little faster than 2 4830's
not sure why
Click to expand...

maybe the article that you can't find anymore was so full of bullshit that amd demanded that it be taken down? possible, no?
 
sparks said:
ALL4AMD there is no mention of the 4830 in the link you posted.

Its funny when the card was first introduced overseas they had a review along with a 4830 crossfired with a 4850 and a 4870 and compared that to the others crossfired together.
All of that is no where to be found now.
VERY FUNNY
Click to expand...

if u read what i bolded in the post i quoted then u would have realized i wasn't talking bout a 4830. i was commenting on the topic of mixing cards adds to their performance.

 
Maybe it's a giant conspiracy. Getting 1 high end and one low-mid end card gives very similar performance to getting 2 high end cards together.
 
DO WHAT? I thought the reqs for CF were:
1) Ample power supply
2) Same GPU
3) Same framebuffer/RAM???

Isn't the 4830 a different GPU than the 4870?
 
Long thread shortened is that it will scale down to the slowest card attached. Every hybrid benchmark points at that. So 2 crossfired 4830s are just as powerful as a 4870 1gb and a 4830 in crossfire.

Honestly, I think you should sell the 4830 and get another 4870. Prices are at that sweetspot right now. I have a single 4870 and I am very happy with it.
 
4870 works with 4850 as far as i know

from the CROSSFIREX, i think it should work with 4830 too
 
Tried it and 4850 works with a 4870, but the performance was only very marginal over the single 4870 so I took out the other card. Just 1x4870 in my comp now.
 
Indeed, you can run a 4830 + 4850, 4830 + 4870, etc..
But like many have already stated in the thread, the more powerful card will essentially slow to match the performance of the less powerful card. These combinations are possible due to the fact that the 4800 series cards all use the same GPU (R770).
 
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