RV740 Announced: Mobility Radeon HD 4830/HD 4860

AnarchX said:
AMD announces 40nm RV740 based Mobile HD4830 and 4860:
http://techreport.com/discussions.x/16506

The 4860 should be a very good competitor against NVs GTX 260M, while holding the possibility to be offered a bit cheaper.

Die-shot!



~136mm² is really a bit over the rumored 100mm²...;)

Press release:
http://www.amd.com/us-en/Corporate/VirtualPressRoom/0,,51_104_543~130418,00.html
Click to expand...

I just read about this on cnn. I was really surprised, since you rarely ever see a mobility part announced first. Hopefully this means I can buy a laptop with one soonish, AMD is saying Q2.
 
its definitely rare that mobile parts are coming out first. But with notebooks outrunning desktops, it may become the norm in the future. 70% density increase. Well then a 1600 alu rv870 doesn't seem impossible.
 
I think it's pretty clear why we see the notebook announcement first. The press doesn't like soft launches for desktop cards, but it's pretty comon for notebook parts.
And it's coming today as a major spoiler for nvidias GTX260/280M launch. If we look at Guru3D's test the 4860M will be a bit faster than the tested part and is going up against a (full) g92 at @585, ie slightly faster than the 4830/9800gt.
Could be nice if they could add a 585mhz downclocked 9800gtx to the test :)
 
Awesome, all we need now is the RBE and MC configurations.

The chip on the left appears to be RV770. If we take the indicated dimensions into account, it's 265mm2.

Recently we discovered from GT200 that packaging the die adds 0.5mm to each dimension. Assuming the same for ATI GPUs that would make this apparent RV770 ~ 249mm2.

So, erm, take your pick.

For RV740 this would mean 125mm2.

Jawed
 
That's surprising news, didn't know they were going to announce it today. Guess that's what "fresh and new" brings against "old and stale."

Now.. why did they call this 4830Mobile (which it honestly is) and not use the name of the RV740 products , or is 4860 a hint at that?

My team here at AMD also plays a huge role in pushing the visual experience on notebooks to new levels. Today we announced a milestone by launching the world's first 40nm graphics processors, the ATI Mobility RadeonTM HD 4860 and ATI Mobility RadeonTM HD 4830. This is the fifth consecutive time that AMD is first to launch graphics processors based on a new process node, but the first time we've chosen to make such a debut in the mobile market. (Not to worry desktop fans: 40nm desktop parts are coming soon.)
Click to expand...
http://blogs.amd.com/play/archive/2009/03/03/compromise-free-mobile-computing.aspx
 
Last edited by a moderator:
Jawed said:
Awesome, all we need now is the RBE and MC configurations.

The chip on the left appears to be RV770. If we take the indicated dimensions into account, it's 265mm2.

Recently we discovered from GT200 that packaging the die adds 0.5mm to each dimension. Assuming the same for ATI GPUs that would make this apparent RV770 ~ 249mm2.

So, erm, take your pick.

For RV740 this would mean 125mm2.

Jawed
Click to expand...

According to the flickr page that's the 4850 "mobile"
http://flickr.com/photos/amd_unprocessed/3323338543/
compares:
ATI Mobility Radeon HD 4850 vs.
ATI Mobility Radeon HD 4860
Click to expand...
 
neliz said:
Now.. why did they call this 4830Mobile (which it honestly is) and not use the name of the RV740 products , or is 4860 a hint at that?
Click to expand...

Well, look at what nVIDIA is doing at the mobile GPUs. They are using G92Bs and branding them as GTX280/260M. So I think its best not to think too much about branding practices from both companies when it comes to mobile GPUs.
 
Very interesting - better news that ASAP. A couple of points:
- Jawed, I'm not sure it makes sense to remove 0.5 in this case because this isn't a real die shot; it's a marketing photo. They are more likely to have written the real die size there than what you'd measure.
- Remember 40nm wafer prices are substantially above 65nm ones right now. Let's assume they're at $7K vs $5K; that means it costs more like a 190mm² chip on 65nm (ala RV670/G94b). Still, it does have a clear cost advantage assuming yields are decent versus G92b/RV770.
 
Arun said:
- Jawed, I'm not sure it makes sense to remove 0.5 in this case because this isn't a real die shot; it's a marketing photo. They are more likely to have written the real die size there than what you'd measure.
Click to expand...
Having dug around I think you're right:

http://www.extrahardware.cz/je-vetsi-g92b-nebo-rv770

These measurements (even if a bit woolly) indicate that the measurements provided by AMD are die size, not packaged die size.

G92b is clearly smaller in this comparison, about 96% the size of RV770.

Jawed
 
The measurement isn't minutely precise, because the clamps are touching the glue, which surrounds the core and not the core exactly, so the difference can be up-to 0.7mm.
 
About that AMD official size comparison... I can't quite read what it says on RV770, but if I read it correctly (18 point something × 16 point something) that would come out to ~300 mm2, that ain't right :nope:
 
Lukfi said:
About that AMD official size comparison... I can't quite read what it says on RV770, but if I read it correctly (18 point something × 16 point something) that would come out to ~300 mm2, that ain't right :nope:
Click to expand...
16.434x16.110. Your browser prolly supports Ctrl-mouse-wheel to zoom the page.

Meanwhile I've just noticed the Mobility HD4860 has 64GB/s bandwidth:

http://ati.amd.com/products/mobilityradeonhd4800/4860_index.html

which is quite a bit healthier than the Guru3D engineering sample :D That should make it match HD4850.

With a bit of luck the desktop part will be about the same.

Jawed
 
Cookie Monster said:
Well, look at what nVIDIA is doing at the mobile GPUs. They are using G92Bs and branding them as GTX280/260M.
Click to expand...
Actually ATI was doing this trick way earlier than NVIDIA even had a mobile GPU.

Jawed said:
Meanwhile I've just noticed the Mobility HD4860 has 64GB/s bandwidth:

http://ati.amd.com/products/mobility...860_index.html

which is quite a bit healthier than the Guru3D engineering sample That should make it match HD4850.
Click to expand...
Well it's called 4860. So it's better match 4850. Or even be a little bit faster. No?
 
What puzzles me are the lenient HD 4830 specifications. Clock it between 450 and 600 MHz and you can call it a 4830, eh?
 
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