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post #3141 of 3492
Quote:
Originally Posted by Seronx View Post

multisocket processing configurations are possible with Kaveri.

hUMA is an evolution to ccNUMA which is used in modern Opterons. The feature to use ccNUMA through non-intergrated parts is still there as well.

Kaveri (standalone) = (Unified Physical and Virtual Addresses)
Kaveri + Bonaire = (Unified Physical and Virtual Addresses) + (Unified Virtual Addresses)
Kaveri + Kaveri + Kaveri = (Unified Virtual Addresses to each other Kaveri but internally all Kaveri's have (Unified Physical and Virtual Addresses))

Kaveri_00 =>
1 x PCIe x8 => Kaveri_01
1 x PCIe x8 => Kaveri_02

Is completely possible but the operating system needs to support it.

Did they take dual socket support out of Win8? I know the pro variations of xp and 7 supported this.

beyond that.. i don't know of any non server OS that takes more then 2 sockets.
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post #3142 of 3492
What would a Kaveri multi socket solution offer that isn't currently available in some form or another in the current market?
post #3143 of 3492
Quote:
Originally Posted by hagtek View Post

What would a Kaveri multi socket solution offer that isn't currently available in some form or another in the current market?

HSA.

multiple HSA processors would be miles better then any GPGPU cards, low latency, high memory, scalability, power efficiency, low-profile (ie stacked in small racks or on children boards).

at the same time though, this is what the ARM opterons are for so I cant be sure if HSA is quite worth it yet, might have to wait for HSA support to pop up more at least in server applications, java for example is getting full HSA in 1.9.
   
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post #3144 of 3492
Quote:
Originally Posted by Seronx View Post

PCIe 3.0 latency is sub-100 nanoseconds and x8 can move 128 Gbit/s(bi-directional).

Still slower, with more latency, than 16-bit HT 3.1 and much slower than a 32-bit HT link or competing interconnects like QPI. A potentially bigger problem is sacrificing nearly all available I/O.

If it was both possible and worthwhile to have multi-socket FM2(+) platforms, we'd have them. Not even Berlin will be 2P+.
Quote:
Originally Posted by Paul17041993 View Post

multiple HSA processors would be miles better then any GPGPU cards, low latency, high memory, scalability, power efficiency, low-profile (ie stacked in small racks or on children boards).

There are plenty of GPGPU tasks that don't suffer greatly from not being HSA, and a higher end discrete GPU has far more ALUs and much more memory bandwidth available to it than any individual, or small cluster of, current HSA processors.

Also, pretty much none of the advantages you list would work without an extremely fast interconnect that Kaveri does not have.
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post #3145 of 3492
Quote:
Originally Posted by Blameless View Post

Still slower, with more latency, than 16-bit HT 3.1 and much slower than a 32-bit HT link or competing interconnects like QPI. A potentially bigger problem is sacrificing nearly all available I/O.
QPI, HT3.1, PEX3(on Kaveri) with all 1-byte/8-bit links

QPI(SB-EP) => (8 GHz * 8 bit * 2 bid) ÷ 8 bits => 16 GB/s bidirectional
HT3.1(C32/G34 Ops) => (6.4 GHz * 16 bits * 1 uni) ÷ 8 bits => 12.8 GB/s bidirectional
PEX3(Kaveri) => (8 GHz * 8 lanes * 2 bid) ÷ 8 bits => 16 GB/s bidirectional

PEX3 does not have;
More latency than current gen QPI/HT.
Less bandwidth than QPI/HT with almost similar pins required. (QPI and HT require about 30+ percent more pins for equivalent bandwidth to PEX3)
Quote:
Originally Posted by Blameless View Post

If it was both possible and worthwhile to have multi-socket FM2(+) platforms, we'd have them. Not even Berlin will be 2P+.
I'm not talking about multisocket FM2+, I'm talking about a PCIe add-on card.

FM2+ => Kaveri
PEX16_0 => Kaveri*
PEX8_0 => Kaveri*

Not
FM2P_0 => Kaveri
FM2P_1 => Kaveri
FM2P_2 => Kaveri
FM2P_3 => Kaveri

*With the PCIe method you could then connect the Kaveri's on the card with Oland/Bonaire/Hawaii/etc via the two PCIe x8 connections.
^ 12 Cores + 1536 ALUs (+ ≤5632 ALUs)
Edited by Seronx - 3/7/14 at 2:23pm
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post #3146 of 3492
Quote:
Originally Posted by Paul17041993 View Post

unfortunately FM2+ cant do multi-socket as it doesn't have the HT lanes available, or at least I don't think it does, the chip itself does however, but at this point I'm not sure what AMD might be doing about multi-socket APU platforms...

I think at this point I would be happy with the ASUS A88X-Pro, but, like you, I don't fancy the gold scheme...
Not for the desktop but there is always moonshot with their aquired interconnects which will be upgraded to Berlin/Kaveri later this year.
Quote:
Originally Posted by FlailScHLAMP View Post

i've been toying with the thought of multi apu configurations and the possibility of amd going that route.

in theory from a consumer point of view, it would make more sense for the high end platform to be multi apu

as to control the power aspect and compatibility issue we see in the Vishera thread alot. FX-8 chip fitting in to boards that just cannot handle them.

glad my shaky understanding of the HT/PEX lanes isn't too far off.

i'm not saying it wont take work. but i dont think it is out side the realm of possibilities.
A8-7600 is incredibly efficient at 3GHz so you could put 4 of those on a board and still only get a 140W tdp
Edited by maarten12100 - 3/10/14 at 1:06am
post #3147 of 3492
Quote:
Originally Posted by maarten12100 View Post

Not for the desktop but there is always moonshot with their aquired interconnects which will be upgraded to Berlin/Kaveri later this year.
A8-7600 is incredibly efficient at 3GHz so you could put 4 of those on a board and still only get a 140W tdp

exactly why high-density servers can use these for great performance in many loads, but we'll just have to see where AMD can go with this, might be a bit of a wait for a later gen with some improvements first...
   
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post #3148 of 3492
Really wanted a new steamroller fx gen
post #3149 of 3492
Quote:
Originally Posted by no1youknow View Post

Really wanted a new steamroller fx gen
An APU has more potential so I doubt we'll see another 4 module chip but it is possible so perhaps excavator will give us some love.
post #3150 of 3492
Quote:
Originally Posted by maarten12100 View Post

Quote:
Originally Posted by no1youknow View Post

Really wanted a new steamroller fx gen
An APU has more potential so I doubt we'll see another 4 module chip but it is possible so perhaps excavator will give us some love.
How I wish for an 8core APU. If L3 really is a waste of space, then it should be possible if removed right?
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