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[BSN] Analysis: AMD Kaveri APU and Steamroller Core Architectural Enhancements Unveiled

post #1 of 62
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Quote:
Recently, we exclusively unveiled that Kaveri, successor to the current "Trinity" high-end APU (Fusion A8 and A10 family) features a GDDR5 memory interface. This time we will talk about architectural enhancements of AMDs upcoming mainstream APU Kaveri as well as enhancements of the Steamroller cores which will also make their way into servers and high-end desktop systems in 2014.

http://www.brightsideofnews.com/news/2013/3/6/analysis-amd-kaveri-apu-and-steamroller-core-architectural-enhancements-unveiled.aspx

Seems like they are doubling the int ops. Probably the single biggest update they could do to speed up the ipc between the modules.
Quote:
Quote:
Increase dispatch bandwidth to 8 INT ops per cycle (4 to each core), from 4 INT ops per cycle (4 to just 1 core). 4 ops per cycle per core remains unchanged.

Also some of the improvements could see 2x improvement in speed from what I can see, but those are only bugs they fixed that are reaching their intended efficiency but will not double the speed of the overall cpu. Just fix some of the bottlenecks.
Edited by Maelthras - 3/10/13 at 4:43pm
post #2 of 62
Finally some IPC improvements
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post #3 of 62
Quote:
Originally Posted by Phil~ View Post

Finally some IPC improvements

Piledriver had IPC improvements over Bulldozer.

Edit: All of these slides have been seen before, there's really not much new information here.
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post #4 of 62
It's nice that Kaveri has a GDDR5 memory interface, but does that really mean anything to an end-user? It's not like you can go on Newegg and buy a few sticks of GDDR5 to run. That feature benefits the PS4, but does nothing for the PC market.

The enhancements that boost IPC are interesting, if AMD can deliver. This reminds me so much of the Pentium 4 days, when it seemed like every new model was Intel saying, "OK, we fixed this crap-tacular flaw this time around..."
     
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post #5 of 62
Call me in 2014 when they release SR because by then I will be on my Haswell-E system.
post #6 of 62
I wonder how will GDDR5 be implemented. Would it be soldered into the motherboard? Or available on a DDR3-style stick?

And GDDR5 is also limited to 256MB per chip as of now, compared to 1 GB per chip for DDR3. Which means in order to have 8 GB of system memory, four sticks would be required (8 chips * 256MB = 2048MB total). Unless if AMD has access to 512 MB per chip density.

Or would GDDR5 be used as a cache of some sort?
Quote:
Originally Posted by Capt View Post

Call me in 2014 when they release SR because by then I will be on my Haswell-E system.

APUs and Intel's hexacores occupy completely different market segment. Nor can run a game on a hexacore with no GPU, or someone buy one for $200.
Edited by A Bad Day - 3/10/13 at 5:40pm
post #7 of 62
2-3 compute units?

so we will see a 6 steamroller core apu?

that would be wicked
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post #8 of 62
Quote:
Originally Posted by A Bad Day View Post

I wonder how will GDDR5 be implemented. Would it be soldered into the motherboard? Or available on a DDR3-style stick?

And GDDR5 is also limited to 256MB per chip as of now, compared to 1 GB per chip for DDR3. Which means in order to have 8 GB of system memory, four sticks would be required (8 chips * 256MB = 2048MB total). Unless if AMD has access to 512 MB per chip density.

Or would GDDR5 be used as a cache of some sort?
APUs and Intel's hexacores occupy completely different market segment. Nor can run a game on a hexacore with no GPU, or someone buy one for $200.

I wasn't talking about the apu. I was talking about the desktop CPU version of steamroller.
post #9 of 62
Regarding the GDDR5 density, there's a interesting link: http://www.samsung.com/global/business/semiconductor/product/graphic-dram/detail?productId=7824&iaId=759

"Density: 4Gb"

I'm fairly sure Samsung would be capable of pushing 512MB GDDR5 chips into production before Kaveri APUs show up.
Quote:
Originally Posted by Capt View Post

I wasn't talking about the apu. I was talking about the desktop CPU version of steamroller.

I haven't heard much about the CPU version. I wouldn't be surprised if AMD is slowly backing away from them and focusing more on the APUs.
post #10 of 62
Wait...its connecting to the memory through the northbridge. That can't be right.
Warning: Spoiler! (Click to show)
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