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Don't trust those leaked benchmarks too much. - Page 4  

post #31 of 130
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Quote:
Originally Posted by Slappy Mcgee View Post
Sweclockers.com / Sweden is 6 Hrs ahead of Eastern Time so maybe they will be the first Review for us on launch day
No, the NDA lifts off for everyone at the same time :/

09.00 GMT+1 in Sweden, I hope they publish the article the same minute ^_^
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post #32 of 130
im sure someone will break the nda 3 or so hours before it ...

ohh and let's not forget this post by chew*



Quote:
Originally Posted by chew* View Post
There are many bios options that can effect the outcome of benches.

HPET is 1 for example, it stops the cpu from throttling back in mulithreaded apps.

Running pi on a cluster, versus a core ( 2 threads ) versus being able to disable a single cluster in a core ( which 99% boards/bios's do not have implemented so resources are not shared ) can all influence the results in single threaded.

Knowing all this tells you one thing for sure, you can make it look worse or make it look better all depending on your knowledge of the chip and or your intentions.

As far as PI it's an antiquated bench and has not been AMD's strong point for quite some time.

Granted some results shown tend to lead to the fact that 1m times are bad but looking at the bigger picture we also know that in many cases you can validate 1000mhz higher in many cases with BD, which would point to the fact that you can run 1m at alot faster speeds than current AMD tech.

Things that make you go hmm like what kind of times will we see at 8 gig or even comparing BD to deneb/thuban when same cooling is used.

the man had access to bd before most
Edited by Fr0sty - 10/10/11 at 7:11am
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post #33 of 130
Even if the benches prove that BD is total crap, that won't stop the AMD fans from purchasing the CPU's.
post #34 of 130
Quote:
Originally Posted by stinky View Post
Even if the benches prove that BD is total crap, that won't stop the AMD fans from purchasing the CPU's.
What's the point of purchasing them if they suck?
post #35 of 130
It was said that there is a cache bug that causes cache to invalidate itself and then having to be called again. The good news though is that it can be fixed through a kernel update. Microsoft and Linux both have been working on it. Also it should be noted that NONE of the people that are benchmarking these chips have this update yet.

I don't know how much performance it will increase but the people that know have said anywhere from 10%-20% performance improvement.


Found the quote:

Quote:
Actually, we already have such an issue known for Bulldozer, and NO bench-marked system has the patch installed!

The shared L1 cache is causing cross invalidations across threads so that the prefetch data is incorrect in too many cases and data must be fetched again. The fix is a "simple" memory alignment and (possible)tagging system in the kernel of Windows/Linux.

I reviewed the code for the Linux patch and was astonished by just how little I know of the Linux kernel... lol! In any event, it could easily cost 10% in terms of single threaded performance, possibly more than double that in multi-threaded loads on the same module due to the increased contention and randomness of accesses.

Not sure if ordained reviewers have been given access to the MS patch, but I'd imagine (and hope) so! Last I saw, the Linux kernel patch was still being worked on by AMD (publicly) and Linus was showing some distaste for the method used to address the issue. One comment questioned the performance cost but had received no replies... but you don't go re-working kernel memory mapping for anything less than 5-10%... just not worth it!
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post #36 of 130
Quote:
Originally Posted by Don Karnage View Post
What's the point of purchasing them if they suck?
even when the P4 sucked .. people still bought it .... same goes for any fail architecture ...

and im not saying bulldozer is a fail ...


im just saying that people will still buy it whatever happens
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post #37 of 130
Thread Starter 
Soon wednesday come on!
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post #38 of 130
Quote:
Originally Posted by BallaTheFeared View Post
Let's argue over whose opinion is right, threads never get locked that way.
Sigged

To add i'm not believing anything until tomorrow.
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post #39 of 130
Quote:
Originally Posted by Phantom123 View Post
I don't know how much performance it will increase but the people that know have said anywhere from 10%-20% performance improvement.
More like 3%
post #40 of 130
Quote:
Originally Posted by Don Karnage View Post
More like 3%
They wouldn't go through all the trouble of rewriting and updating the kernal for both Microsoft AND Linux if it was 3%. It has to be at least 10%.
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