leaked pictures of an engineering sample of HD 6770 256BIT!

http://www.fudzilla.co[LIST]
[/LIST]m/images/stories/2010/September/General_News/amd_barts_1.jpg



according to various sites it is codenamed Barts XT and have 256BIT of memory interface that should end up replacing HD 5770

as you may observed the card has

• 2 PCI-E 6PIN Power connector
• 1 Crossfire Bridge
• longer PCB than HD 5770

sources:
AMD "Barts" XT card pixellized - Graphics - Graphics - Fudzilla

SemiAccurate :: One more AMD graphics card leaks

 

But why post a desktop card?

 

Because the desktop card is the first step to making a mobile card.

 

Mobile card will not have a 256bit interface. Too much power and heat.
Won't see 256 in a mobile chip till 2012.

 

I disagree. If they are changing the shader design, the GPU is going to more efficient and they can use slower vram to cut back a little more. They have up to 100w to play with now.

 

I wonder what the TDU cutoff of mobile GPUs will be. Right now, 5870 and 460m are around 70-80w, getting hot, but still manageable. I'm not too excited about 100w and above becoming the new norm.

 

High end mobile gpu's came before with 256bit interface, so I think you are a bit misinformed.

 

256-bit mobile chips go all the way back to Nvidia's Go 6800 series, maybe a bit further.


As far as whether the Mobility 6870 will use 256-bit GDDR5, I'll just post this here:



It's almost a guarantee, that the MR 6870 is coming from the Radeon 6770.

 

my 4850 are adrealy using a 256 bit interphase so i think it's the return of it to the mobile market we will likely see quite a jump in perf if there 256 bit and gddr5

 

The GTX 480M and Quadro 5000M already have 256-bit and GDDR5.

 

If you have the space (MXM-B) low speed 256bit GDDR5 could actually be more power saving than high speed 128bit GDDR5.

This is an engineering sample so number of power connectors, heatsinks and crossfire bridge connectors could EASILY change.

 

It's already been spammed and posted numerous times that the HD6870M is 256 bit and likely the mem speeds will be higher yet. GDDR5 comes in different speeds and we've already seen that the desktops are using the fastest GDDR5 available now, which is why the HD6870's memory bandwidth is higher than GTX 480's slower, but higher bit rate, 384, ram.

Anyways, just be excited if you are waiting on for the next gen cards from Nvidia and AMD. But I would wait 2 generations, when they can release in 28nm, as the next round from AMD is still 40nm.

 

I just wish they would kill off 64bit cards...

 

Looks way too noisy and hot for my liking.

EDIT: and why the boners for 256-bit memory? My desktop Radeon 9800XT had it more than half a decade ago.

 

Uh yeah dude, the bit "interface" isn't the only aspect of heat dissipation to worry about.. to boot, the card i'm running on right now has a 256 bit bandwidth.

 

Poor FXi. These guys are shelling you. Honest mistake. We all for give you. I really don't have a clue what it all means anyway.

 

256 bit to DDR3 - not the same deal sorry, despite folks carrying on like it was the same thing. VERY different controller, and heat and power thus associated. So I'm not too worried about the comments. We come here to discuss, and you have to be able to take some heat once in a while and still smile about it

As for speeds, the laptops are already running low speed GDDR5, just have a look at the figures and you'll see. Bandwidth is 1/2 to 1/3 of desktop GPU's as well, which is how things pan out. So don't expect that to drop again, in some vast decrease in power people might be imagining.

All I'm trying to indicate is that the only place you'll see higher bandwidth chips is on the desktop. People are confusing the news of the desktop improvements to have hopes you might see the 256 bit spec in laptop GPU's. I don't think you will, and it's crazy to get people's hopes up when it's just not going to happen.

 

im not sure how you can judge just by looking at pictures but whatever.

 

480m's are runniing 256bits with GDDR5 with low speed. Radeon Mobility HD5870 have high speed GDDR5 but only 128 bits.

256 bits and high speed GDDR5 is certainly capable on mobile GPUs, but there was usually concern for heat and power, until 480m was introduced. Further optimization, and moderate GDDR5 speeds, will allow much higher bandwidth on laptop GPUs. With current temps and power drawn, a 256 bits moderate speed GDDR5 HD6000 series is more than possible, considering how low temps I get with the current HD5870, and only using a lowly 120w PSU.

 

I.......couldn't tell if you are/were right or wrong. I really could care less as long as my games play. 128, 256-

FUNNY!!!!!!!

Like in the M17x R2? The 5870 is GDDR5. Right? But the fact that it is 128 bit would make it slower, per se, than it's desktop counterpart, as is the case with ALL cards, correct? Is it true then, if you want the best performance for desktop, to look for 256 bit cards? Just trying to gain some knowledge here.

 

They already have per se. nVidia's low end card is 128-bit GDDR3, while AMD's low end card is 64-bit GDDR5 (which is around the equivalent as the former).

That's because the Mobility 5870 is based on the desktop 5770 and NOT the desktop 5870.