RV870 is 1.6 times faster than RV770

illyan

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May 7, 2007
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60% faster than a 4870 isn't that great... It won't even be as fast as a 4870X2 in some cases. I hope this is wrong.
 
Who knows, this has most likely been translated from Cantonese using simple Chinese translator, rewritten by a Bosnian in Bosnian, then converted to english.
Or, it could mean the 5850, as it too has the same family class, and the card isnt known as evergreen, thats the whole family name.
So, what do we know after reading this? Itll be at least as big a jump as going from 3xxx series to the 4xxx series
 

Dekasav

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I don't know, 60% faster seems pretty good to me. I figured that's about as high as the HD 4870x2 until someone said it wasn't. I didn't know crossfire got 60% scaling.

Even so, if it releases at only $350, it's cheaper than the HD 4870X2, anyway.
 

illyan

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The 4850 is equal, if not faster than the 3870X2. The 3870X2 is about 1.5-1.7 times faster than a single 3870, so the 3870->4850 was about 1.6 times. The 4870 is faster yet than the 4850, so the 3870->4870 jump was greater than 1.6 times, more like 1.8-2.0 times as fast.

This article is comparing RV870 to RV770 as well, not RV790. If a 4890 is about 1.2 times as fast as RV770, and overclocked it is about 1.3-1.4 times as fast, the RV870 will only be 20-40% faster than a 4890.

If RV870 truly has twice as many shaders as RV770/790, this doesn't sound right at all, unless the clock speeds are a lot lower or something. So I hope something got lost in translation, or that this article is plain wrong.
 

hannibal

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Well having twice the amount of shaders does not mean that the card is twice faster. So 1.6 is guite ok. The difference is bigger in shader heavy games and less in other tittles. The best part in anyway is that both ATI and Nvidia are in the same boat with DX11, so we may actually see some advancement in that sector!
If the price is right, I am just happy! And if the Nvidia version is fast allso, the better. Still no monopoly in this area!
 
Well, this is the lowest rumor Ive heard. Actually thats good, but umm, leave it to L1qu1d to post the worst rumor on ATIs new launch
Why not Charlie over at Semi? Heres what he has to say
First definitions:
1) There is no RV870, nor has there ever been, the parts are called Evergreen, and the one he is referring too is called Cypress.
2) If AMD had used the numbers for this generation, the part would be R870, not RV870. The V connotes derivative parts, the first is R.
3) R770 was the basis for both the 4850 and 4870, the former using GDDR3 and the latter GDDR5.

You can easily make a Cypress part that is 1.6x slower than an R770 based part, how fast is the 4830 again?

-Charlie
http://www.semiaccurate.com/forums/showpost.php?p=3433&postcount=13
 
Heres what happened last gen
ATI radeon HD 3800 ATI radeon HD 4800 Difference
Process 55nm / 55nm no
Die size 190 mm2 / 256 mm2 1.35x
Tranzistors 666M / 956M 1.4x
4x AA Fillrate 8 / 16 2x
Z/Stencil 32 / 64 2x
Texture 16 / 40 2.5x
Shader 320 / 800 2.5x
Bandwidth 72 GB/sec / 115.2 GB/sec 1.6x


 

L1qu1d

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I simply posted the article i didn't create the article, its on a reputable site from what I see.

Thus its a rumour, so I think taken with a grain of salt should be a great expression to use atm and am surprised that u of all people found the words to use my name as a source for whats wrong with the post.

I never knew I influenced ppl so much to have that type of rep. ;)

kill the message creator not the messanger
 

lorik

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so if its 160% then they'r in the right track but if its only 60 then thats dissapointing ,and this was compared to 4870 which is incorrect few ppl have 4870 whilst 4890 is selling like hotcakes for now
 

L1qu1d

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my apologies I didn't see it;) I guess the excitement got to me.

I've already got my new CF motherboard chosen out. Now its the cash thats gonna be the prob.

 

L1qu1d

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160% seems kinda big don't u think? I mean it would pwn as a card, but I think what they might mean is 1 4870 + 60%.

Which is decent for a single CPU it would put it above the 285 and the 4890 at a very good price/temp for OC.

Plus the 40 nm design will be smaller than Nvidias 40 nm design.
 

invisik

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From ati 3xxx series to ati 4xxx series the performance was doubled. I think there will be a higher jump then just 60%. Nvidia doubled in performance as well 9800x2=gtx280. This is the next gen of cards, much like the huge performance gains when dx10 was introduced. Wouldnt be surprised if next gen cards double todays cards performance.
 

Nica Guy

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60% better than a 4870 in BEST CASE SCENARIOS...


i think it will be like 20% faster than a gtx 285... and will overclock for even more...

i see it performing a little over a FTW gtx 285 or any other OC 285... at stock (the ati card)...