AMD Working on 16-Core Processor with Integrated PCI Express 3.0 Controller
In a document published by AMD some new information surfaced. It seems that AMD is working on a new 16-core processor, and that is a true 16 cores, thus not a an 12 CPU cores and 4 GPU cores combo or anything. And no it is not the existing AMD Opteron 6200 Series either. This is something new. Obviously such a processor would see a launch in the server segment first hence we think the processor will be an Opteron. The developer documents list the 16-core unit under Family 15h Models 30h – 3fh.
This 16-core processor will have a full uncore, which is terminology for the functions of a microprocessor that are not in the Core like QPI controllers, L3 cache, on-die memory controller and so on. The PCI Express and SPI are typically merged into the the chipset, not the Uncore.
There is no confirmed information available on what technology or family (Piledriver etc) the CPU cores are architectured but the Family 15h Models 30h – 3fh indicate SteamRoller CPU cores as previously released in AMD's Kaveri APUs; yet in this case with eight dual-core processor modules on a single die. Have a peek at the document right here.
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Assuming this is gunna be a monolithic die for server applications, though if they did export do desktop...

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By the time they integrate PCI-E 3.0, Intel will be on 4.0 lol.
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I doubt that

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I would hope so. As far as I'm aware, we haven't even saturated 2.0 yet. Aside from some SSDs, I don't really understand the point of releasing PCIe 3.0.
AMD already has several 16 core Opterons. I'm guessing their current generation is Steamroller based, and I figure this new 16 core will also only be an Opteron. AMD has stated before they're not targeting the high-end/enthusiast desktop PC market anymore and that's exactly what a 16 core would be classified as. I don't see a reason for a 16 core entering the desktop market anyway - most people still can't put good use to an i7. But, Opterons are still relatively cheap. You could probably make a pretty good desktop computer out of an Opteron system as long as you expect the motherboard you get likely lack Crossfire/SLi support, built-in audio, and a slew of USB ports.
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It would be good if available for desktop and not costing an arm, leg, and left teste. I'm guessing Excavator based? Since it would make sense to be on 20 nm or even 16/14 nm.