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is "8 core" BD really a quad core? - Page 4

post #31 of 41
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http://realworldtech.com/page.cfm?Ar...2610181333&p=4

There's a HEAVILY detailed look at the Bulldozer architecture.

From what i read, they went for a frequency design, as in, clock speed over IPC, and try to cram in more cores within a given space.
     
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post #32 of 41
Quote:
Originally Posted by Dmac73 View Post
Chew* and AMD engineers agree it's a 4c/8t part. I'll go with them.
commentary from AMD engineers with a verified source ? I haven't seen any.
post #33 of 41
Quote:
Originally Posted by Dmac73 View Post
Chew* and AMD engineers agree it's a 4c/8t part. I'll go with them.
Thuban had 1 integer core, 1 128bit fpu per core, total of 6 of each.

Sandy bridge 1155 has 1 integer core, 1 128bit fpu per core, total of 4 each.

Bulldozer has 1 integer core, 1 128 bit fpu per core, total of 8 each.


Calling it a 4c/8t part just eases the pain of how crappy each core really is. It does not perform like a 4c/8t part.
    
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post #34 of 41
Quote:
Originally Posted by BallaTheFeared View Post
Thuban had 1 integer core, 1 128bit fpu per core, total of 6 of each.

Sandy bridge 1155 has 1 integer core, 1 128bit fpu per core, total of 4 each.

Bulldozer has 1 integer core, 1 128 bit fpu per core, total of 8 each.


Calling it a 4c/8t part just eases the pain of how crappy each core really is. It does not perform like a 4c/8t part.

You right, in many instance it spanks the snot out of a 4c/8t part.

the problem is the door to the bathroom stall where the toilet is, its to narrow. with current scheduler designs.
post #35 of 41
Since the instances are many, please produce a few for our viewing pleasure, using the same instruction set of course.
    
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post #36 of 41
Quote:
Originally Posted by ballathefeared View Post
since the instances are many, please produce a few for our viewing pleasure, using the same instruction set of course.
lolz
post #37 of 41
Quote:
Originally Posted by ChronoBodi View Post
there's all the media talk of "OMG 8 core loses to intel 4 core!"

I think that's not really correct, should it be 4 modules vs 4 cores? But then again they look at the Bulldozer and are like "WOAH 8 cores!"
This helps explain it a bit better

Basically it shares alot more cache between processing pipelines among other things



Quote:
Originally Posted by transhour View Post
define "core" please...we say things that have no real meanings, like we call most modern cpu's 64bit, but they aren't really, there plenty of parts that have more bits and less bits than that. they have 64 bit gprs, but 128-bit xmm registers, but the memory registers are 48 bit, and most fpu's are 128 bit...so why do we think of them only as 64 bit cpu's?

so to answer your questions, you'd have to answer what makes a core.
Also most highest end graphics cards are 256 bit.
Edited by rushthezeppelin - 10/17/11 at 3:48pm
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post #38 of 41
Quote:
Originally Posted by rushthezeppelin View Post
<snip>



Also most highest end graphics cards are 256 bit.
that is something entirely different. that is the gpu's memory bus, or interface across several channels, has nothing to do with cpu architecture.
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post #39 of 41
Quote:
Originally Posted by BallaTheFeared View Post
Since the instances are many, please produce a few for our viewing pleasure, using the same instruction set of course.
Numerous productivity app benchmarks say so. Its not a great gaming cpu, but its good for people who have workloads that favor the design.
post #40 of 41
AMD sells the whole 8 core shenanigans, It’s not a true 8 core CPU It acts more like a 4 Core 8 Thread CPU, hence the benchmarks. Like say when you are running multiple applications and both threads/cores get tied up in the single module, all of the sudden the module starts sharing resources between the two threads/core a true core does not do that, it only shares the L3 on the die between the various cores.

AMD can use all the technical’s jargon they want to say it’s an 8 core from a technical stand point…but benches don’t lie.
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