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The Zambezi CPU Performance Estimate...

post #1 of 354
Thread Starter 
Ok, so we have the Intel Core i5-750 @ 3.2 GHz (OC), with 4 cores..
(It can do 4.0 GHz but we will be using 3.2 GHz for calculating purposes)

Then we have the reportedly* 3.5 GHz 8 Core Zambezi with Turbo Core which can add another 500 MHz across 8 cores... Which = 4.0 GHz essentially...
(*rumored)

Anyone care to do the math to compute the "possible / probable" performance output here?

+Rep to those show their Math Work!

I want a guesstimate of the probable performance output in an understandable % Performance Gain + GFlops + Passmark CPU Score, if possible.
Edited by _GTech - 5/6/11 at 3:09pm
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post #2 of 354
That's not a fair comparison.

Everyone knows Intel processors are the fastest!
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post #3 of 354
You tell me how many calculations per clock, per core each CPU does and I'll work it out for you
post #4 of 354
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Quote:
Originally Posted by antuk15 View Post
You tell me how many calculations per clock, per core each CPU does and I'll work it out for you
Are you saying it's impossible to guess based upon the input provided?

From what I posted I can tell you that it's a 0.8 GHz gain (4.0 GHz - 3.2 GHz) Per Core, but then you have to add to the fact that 4 new cores have been added, so + 3.2 GHz X 4 for the combined total of 19 GHz of added performance? (not sure on this)

There are strong rumors that the Zambezi will do 0.5 Terraflops!!! o.O

I need someone to help me guesstimate a near % in performance gain we are talking here!

====================

Even if the below posted rumors are true...

X1.5 Performance Gain (or 50% gain over the i7-950)....

Which is running 3.06 GHz

We would be talking about an overall gain of 1.53 GHz in performance... (doesn't seem like much for 8 cores)

Or, the equivalency of running an i7-950 @ 4.59 GHz, though not a viable 24/7 OC, it would be one very fast CPU no?

Then enters the factor of Overclocking for the Zambezi 8 Core CPU...

Though, the CPU could come possibly locked? (Who knows on this subject?)

If the Zambezi is in fact able to be Overclocked to say 5.0 GHz, we would be talking about one STELLAR CPU here no?
Edited by _GTech - 2/8/11 at 10:20am
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post #5 of 354
There's more to a processors performance than just clock speed.

Take for example a Phenom II quad core @ 4ghz vs my i7-950 @ 4ghz with HT off.

Both will have the same clock speed but one will be superior. I won't say which. But you get the point.
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post #6 of 354
Thread Starter 
Quote:
Originally Posted by XZibit
AMD's Bulldozer Microprocessors Expected to Offer 50% Higher Performance than Core i7, Phenom II Chips.

AMD's Next-Generation Desktop Chips Rumoured to Offer Tangible Performance Increase
[01/14/2011 01:43 PM]
by Anton Shilov

The next-generation desktop central processing units (CPUs) from Advanced Micro Devices with Bulldozer micro-architecture are projected to offer around 50% higher performance compared to existing chips from AMD and Intel. While the alleged promises presumably from confidential documents seem very "promising", they should be considered as extremely rough performance estimates.

An AMD document obtained by Donanimhaber web-site claims that an eight-core Bulldozer microprocessor offers 50% higher performance compared to quad-core Intel Core i7-950 with HT microprocessor in games, rendering and multimedia applications. The web-sites does not specify which benchmarks were used. In fact, 50% higher performance versus a quad-core chip does not seem to be bad, especially in games that do not usually take advantage of multi-core chips.

The web-site claims that AMD compares performance of the Core i7-950 with performance of AMD Phenom II X6 1100T chip, which is considerably slower than its rival, according to performance tests conducted by X-bit labs. It is unclear whether AMD showed the model 1100T being slower or faster than the i7-950. Test settings were not revealed. Typically, AMD publishes so-called "simulated benchmark results".

Rumours published earlier this month suggested that AMD plans to return the FX products family with extreme performance. Indirectly, this information confirms very high performance of new microprocessors from AMD.

Engineering samples of code-named Zambezi (desktop Bulldozer) chips became available for AMD's partners for testing in December, 2010. Production candidates should be ready by February '11 and the initial production of the company's first desktop microprocessors powered by the long-awaited Bulldozer micro-architecture is scheduled to start in April next year. Probably, the launch of the chip will occur around the same timeframe.

Eight-core Zambezi features four dual-core Bulldozer modules, each of which is believed to have 2MB of shared level-two cache, that will share 8MB L3 cache. In total, the whole chip will pack in whopping 16MB of SRAM, a 77% increase from the current six-core microprocessors that have 9MB of cache in total. Clock-speeds of the chip may be as high as 3.50GHz or even higher.

The first Zambezi microprocessors to be launched are expected to be eight-core products with 95W and 125W thermal design power as well as 8MB L3 cache. Later in the second quarter of 2011 AMD, according to sources with knowledge of the company's roadmap, will release six-core chips with 8MB L3 cache and four-core products with 4MB cache. All of the processors will feature TurboCore 2.0 technology, dual-channel DDR3 memory controller with up to 1866MHz memory support and will be compatible with AM3+ mainboards.
Source



This is all that I have seen online...
Edited by _GTech - 2/8/11 at 10:12am
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post #7 of 354
Thread Starter 
Quote:
Originally Posted by blackbalt89 View Post
There's more to a processors performance than just clock speed.

Take for example a Phenom II quad core @ 4ghz vs my i7-950 @ 4ghz with HT off.

Both will have the same clock speed but one will be superior. I won't say which. But you get the point.
While this may be true, and even viable, are you even remotely considering that Bulldozer is a new architect at all?

Your comparing like an i7 vs a Core 2 Quad here, or am I wrong that the Phenom II X4 came out around the time of the Core 2 Quad?

Nevertheless if you compare the Core 2 Quad vs the Phenom II, how does it stack up? See my point?

======================

I'm looking at Zambezi as AMD's answer to Sandy Bridge...

As Phenom II X 6 was AMD's answer to the Core i5/i7 CPUs, which still did not outperform the i7, as we are all very well aware of..
Edited by _GTech - 2/8/11 at 10:06am
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post #8 of 354
Quote:
Originally Posted by _GTech View Post
While this may be true, and even viable, are you even remotely considering that Bulldozer is a new architect at all?
Err. You're the one not considering that fact. And a whole crapload of other facts.
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post #9 of 354
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Quote:
Originally Posted by Devilmaypoop View Post
Err. You're the one not considering that fact. And a whole crapload of other facts.
It would be snide to respond.. TLDR;

But I'm not a troll, and neither should you be...

Care to delve upon the missing facts and add more of your insight to this discussion?
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post #10 of 354
For first, you cant just add up gigahertz like that. It doesnt work that way, because it's four cores running at 4ghz. Not 4x4ghz = 16 Ghz

Bulldozer will be completely different architechture than Phenom 2, so you cant go assuming it would be par with i7's. We have no idea what's it like, since for all we know it could be 20% faster than i7's architecture or 10% slower.

Clock speed isnt the only speed in CPU's. If you have a Pentium running at 2 ghz and an i7 running at 2 ghz with all but one core disabled, the i7 will wipe the floor with the pentium. Theres everything from architecture to cache size to consider on. That's what everyone else has been trying to tell you.
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