[newzhunter]

Got some inside info from a source who doesn't wish to be named.

HD 4870 X2 has 1024MB GDDR5, 2x 256bit memory interface, 1050MHz shader clock, 1800MHz memory clock. Core clock is defined by the AIB partners and ASUS will have the highest clocks.

While Radeon 3870X2 relys on the PLX chip to communicate between the GPUs, 4870X2 GPUs will comunicate with each other through the memory. Since the GDDR5 is clocked at 1800, the total bandwidth will be roughly 160 GB/s at 1 Gigabyte through the 256bit-bus, compaired to the 8 GB/s of the PLX chip of the HD3870x2. Also 4870x2 WILL NOT have micro studdering.

[Guilherme]

That will solve render to texture problems with AFR? What does studdering means?

[w0mbat]

Shaderclk? 1050MHz?

[Reaperrr]

Originally Posted by w0mbat

Shaderclk? 1050MHz?

I wonder about that, too.
The recently leaked AMD presentation that claims 800 SPs and core clocks of 625 for 4850 and 750 for 4870 said nothing about a separate shader clock.

Besides, those numbers are indentical to those (probably fake) spec sheets floating through the web since Feb.

I won't believe anything of this until AMD officially confirms it.

[KonKorT]

But this source tells about a separate shader clock.
There stands 1050 MHz shader clock for HD 4870. HD 4870 X2 has not specificed yet.

http://www.hardware-infos.com/news.php?news=2075

[trek554]

Originally Posted by Reaperrr

I wonder about that, too.
The recently leaked AMD presentation that claims 800 SPs and core clocks of 625 for 4850 and 750 for 4870 said nothing about a separate shader clock.

Besides, those numbers are indentical to those (probably fake) spec sheets floating through the web since Feb.

I won't believe anything of this until AMD officially confirms it.

the 4870 has been listed at 1050mhz for shaders for many weeks now. that "AMD presentation" saying 800sp is fake by the way.

[w0mbat]

AMD made a massive FUD campagne including fake documents. The HW-Infos docs are also fake, 100% shure.

[MrBungle]

the 3870 X2 is more or less equal to dual 3870's. i wonder if the 4870 X2 will be faster than dual 4870's. i doubt i'll be able to wait until August to find out. i guess i can read about them here when they come out.

[f4lcon]

still highly depends on the drivers

[Tchock]

Originally Posted by trek554

the 4870 has been listed at 1050mhz for shaders for many weeks now. that "AMD presentation" saying 800sp is fake by the way.

The 800SP rumour holds water. It stands with the official PR "features" list that say the 4850/4870 has a "Terascale" engine- which is 1TeraFLOP.

The shader clock suggestion is UTTER BS. You don't redesign 95% of the shader unit logic, just to get 300Mhz extra. Someone was really stupid on spreading this.

Plus, with ATI's multi-issue ALUs, they don't exactly need shader clocks that high either.

[ImmortalZ]

*sigh*

When will people learn?

It is not possible to design a GPU with separate shader clock in the time it took for 3870->4870.

Unless of course, it was being developed parallel with the RV670 (like the X1800/X1900).

[Nuker_]

The separate shader clock does indeed sound very stupid for anyone to believe. I would be pleased if this series of cards will have 800 ALUs.

[m4dn355]

Originally Posted by Guilherme

What does studdering means?

It is spelling mistake, the real word is stuttering - and it means to pause frequently.

[Megalord]

Originally Posted by Nuker_

The separate shader clock does indeed sound very stupid for anyone to believe. I would be pleased if this series of cards will have 800 ALUs.

How is it not possible to implement a asymmetrical design from a symmetrical design in such a long time frame? Of course, unless you just import a design you have no idea what it is about, and try to make it asymmetrical. Is it the case here?

[265586888]

Originally Posted by newzhunter

Got some inside info from a source who doesn't wish to be named.

HD 4870 X2 has 1024MB GDDR5, 2x 256bit memory interface, 1050MHz shader clock, 1800MHz memory clock. Core clock is defined by the AIB partners and ASUS will have the highest clocks.

While Radeon 3870X2 relys on the PLX chip to communicate between the GPUs, 4870X2 GPUs will comunicate with each other through the memory. Since the GDDR5 is clocked at 1800, the total bandwidth will be roughly 160 GB/s at 1 Gigabyte through the 256bit-bus, compaired to the 8 GB/s of the PLX chip of the HD3870x2. Also 4870x2 WILL NOT have micro studdering.

Still the R700 = MCM RV770 w/ Memory Sharing old news from day one the speculations about the R700 generation starts circulating all over the web? Come on, it's just a blend of that info with that hardware-infos leaked clock speed from "official AMD documents to partners", and you call that NEWS?