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The Zambezi CPU Performance Estimate... - Page 14

post #131 of 354
Quote:
Originally Posted by _GTech View Post
That's 500 MHz Turbo Core is for the 16 cores, it will be higher for the 8 core versions (& lesser core versions), as TDP limitations on 16 cores is different than 8 cores...

I hope you are referring to Cache rather than RAM in that 50% figure..
You are misunderstanding what I had said. ~500MHz of boost for 16 cores, higher when using fewer core on the same chip. The 500MHz number is for all cores active. Theoretically, on the same workload, you would have the same TDP headroom on an 8-core and a 16-core. Think of it as 500MHz with all cores active, higher with less than all cores active.

Quote:
Originally Posted by pietro sk View Post
BD
8c*3,5GHz*4flops/cycle = 112GLOPS (IIRC, without AVX)
AVX and 128-bit FMAC give you exactly the same FLOPS for our architecture. It is SB where 128-bit is half of 256-bit.

Quote:
Originally Posted by pietro sk View Post
finally i found it :
It was determined that intel is not double pumping their FPU. They do only have a 128-bit FPU but they steal their SSE exectution lines to do 256-bit, which is why they cannot do AVX and SSE on the same cycle.
post #132 of 354
Thread Starter 
Quote:
Originally Posted by JF-AMD View Post
You are misunderstanding what I had said. ~500MHz of boost for 16 cores, higher when using fewer core on the same chip. The 500MHz number is for all cores active. Theoretically, on the same workload, you would have the same TDP headroom on an 8-core and a 16-core. Think of it as 500MHz with all cores active, higher with less than all cores active.



AVX and 128-bit FMAC give you exactly the same FLOPS for our architecture. It is SB where 128-bit is half of 256-bit.



It was determined that intel is not double pumping their FPU. They do only have a 128-bit FPU but they steal their SSE execution lines to do 256-bit, which is why they cannot do AVX and SSE on the same cycle.
Thanks for the clarifications JT

The last part in your post I read about somewhere online...

I read that it will be in Ivy Bridge though, or did I read about it wrong?

I am severely impressed with Sandy Bridge and dearly want to make a new PC (tax season), but I don't have anything to go on from Bulldozer to make a decisions...

Just tell me ONE THING JT-AMD, is it worth the wait or no? PLEASE I BEG YOU!
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post #133 of 354
The Director of marketing is almost assured to tell you no, it is not worth the wait.

I think people are making too big of a deal out of floating point, at least on the client side.

My Sandy Bridge chip has put out over 130 GFlops, but when I tried to figure out if it mattered or not I couldn't find anything conclusive.

I did tests with my 1090T vs my i5-2500k and while it was before service pack 1 and the floating point isn't fairly represented on the Sandy Bridge chip I'm not sure why it really even matters.

1090T 4.3GHz or 4.4GHz



i5-2500k 5GHz




Whoever said integer core performance of the 1090T was better than the core i7-9x0 chips was clearly mistaken, and it seems to be the most important factor in "is my gpu being bottlenecked?".
    
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post #134 of 354
Quote:
Originally Posted by WannaBeOCer View Post
I think AMD will be the winner until 2013 because Ivy Bridge is supposedly a die shrink with a slight performance bump.
Clock for clock the difference will probably be no more than 10% from SB, but they'll probably fit more cores onto it as well, if Bulldozer competes those 8 core ones won't be EE only, otherwise they will be.

Quote:
Originally Posted by BallaTheFeared View Post
Not that I would ever buy a server chip and put it in a home user board
Why not? Exactly the same chip, but probably better binned.
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post #135 of 354
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I'm always willing to admit I was wrong, in fact I like getting owned in threads, it's a fun way of learning, so when your wrong, people are nice enough to point out the facts and set you straight like a lost puppy walking onto the street...

I just hope someone catches me before I get ran over by a bulldozer..
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post #136 of 354
Quote:
Originally Posted by _GTech View Post
I'm always willing to admit I was wrong, in fact I like getting owned in threads, it's a fun way of learning, so when your wrong, people are nice enough to point out the facts and set you straight like a lost puppy walking onto the street...

I just hope someone catches me before I get ran over by a bulldozer..
lol, I suppose that works. As long as you aren't the type of person that keeps saying the same thing after being proven wrong. Just sometimes you come off as sounding like you KNOW something for a fact when there is no way to possibly know at that time that can grind peoples gears.
post #137 of 354
so your compairing a 3.2ghz 4 core cpu to a 4ghz 8 core cpu... i wonder who will win ?
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post #138 of 354
Quote:
Originally Posted by ShortySmalls View Post
so your compairing a 3.2ghz 4 core cpu to a 4ghz 8 core cpu... i wonder who will win ?
idk when you people will ever learn
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post #139 of 354
lol @ "you people".
    
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post #140 of 354
I haven't read this whole thread, ( and don't plan to ), but since the 4th post speculation was based on 50% rumored performance, which I'm guessing is based off that "Turkish" website that released some chart. I just thought I'd leave this here, in case it hasn't been mentioned before.



If this has been mentioned before, please ignore this post.

Peace out.
Edited by 2010rig - 2/14/11 at 9:36pm
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