AMD to start Bulldozer AM3+ production by March 2011, launch in April 2011

[qcmadness]

I think the shared L2 per core pair with a size of 2MB is going to be a big deal for many desktop apps.Redpriest over at SA forums once said that AMD suffered a lot because many apps were optimized for just that cache size as a sweet spot (on intel HW since past Core2 they had very fast and large shared L2 cache). AMD finally tackled this issue with fairly large and fast L2. Compared to Thuban,in single or poorly threaded desktop workloads there is now 4x more L2 cache running at full clock with 2x greater load/store BW than Thuban core. Further,the L3 is now 33% larger and partitioned with 2.4Ghz+ frequency(20+ percent improvement Vs Thuban).
Just looking at cache subsystem BD is on whole other level than Thuban.

Then how about post-Nehalem CPUs?
The logic is flawed.

[informal]

Then how about post-Nehalem CPUs?
The logic is flawed.

It might look flawed,but in reality,whatever was optimized for Core2 ran at least equally well or better on Nehalem. Small but very fast private L2 and large but still fast shared L3 was a design decision that came from monolithic die approach for quad core Nehalem(and similar in Barcelona's case).

[Sn0wm@n]

Link? It seems to me that the performance of recent Intel processors has proven the effectiveness of HT

ohh really??? might it be the fact that its more ipc related .. and not related to HT ...

[JumpingJack]

ohh really??? might it be the fact that its more ipc related .. and not related to HT ...

It certainly is IPC related, HT helps in most cases to improve the total number of instructions retired per clock by overprisioning the frontend and taking advantage of long latency siutaitons.

http://www.xtremesystems.org/forums/...&postcount=169

[FlanK3r]

Guys, first photo of AM3+ board from MSI


BIG thanks for Daveburt

http://pcper.com/comments.php?nid=9584

[Apokalipse]

I know. Doesn't change the fact, though.

Not having 28nm GPU's this year isn't a fact. It's plain wrong.
We can expect both Nvidia and AMD to have 28nm GPU's this year.

[zalbard]

Yeah, I mixed it up with mobile HD7xxx news. The top mobile card isn't coming out until Q1 2012.

[Apokalipse]

Learn to read.
/facepalm
It's Q1 2012 for high-end AMD cards.

Northern Islands (HD7000) GPU's are slated for this year. In 28nm.
Only question is if it's by TSMC or GF. Or both.

[zalbard]

Dude, I edited. See above.

[cobra_kai]

ohh really??? might it be the fact that its more ipc related .. and not related to HT ...

Not sure I understand this statement... HT is one of many methods used to increase IPC. Saying it is IPC related but not HT related is a contradiction.

It certainly is IPC related, HT helps in most cases to improve the total number of instructions retired per clock by overprisioning the frontend and taking advantage of long latency siutaitons.

http://www.xtremesystems.org/forums/...&postcount=169

As the graph linked here shows HT usually improves performance, and in the worst case has no affect on performance. Presumably the benchmarks where performance does not improve are not heavily threaded ones.

[-Boris-]

Not sure I understand this statement... HT is one of many methods used to increase IPC. Saying it is IPC related but not HT related is a contradiction.



As the graph linked here shows HT usually improves performance, and in the worst case has no affect on performance. Presumably the benchmarks where performance does not improve are not heavily threaded ones.

HT is part of total IPC, total IPC isn't a part of HT.

[gosh]

As the graph linked here shows HT usually improves performance, and in the worst case has no affect on performance. Presumably the benchmarks where performance does not improve are not heavily threaded ones.

About HT: How good is hyperthreading?
Hyperthreading does indeed give a measurable advantage that shows in benchmark tests. This is a strong sales argument that may convince the confused consumer. But the microprocessor designer should also take into account that few applications are able to handle hyperthreading optimally. This is a technology that places a considerable burden on software developers as well as on operating system designers. We may ask whether the silicon space that is used for implementing hyperthreading might be better used for other purposes?

[Manicdan]

i dont like HT simply because it confuses people when they hear 8 threads and check their task manager, and they think its just going to be twice as fast, instead of 0 to 40% faster.

so in the end i would call it a marketing gimick rather than a real solution to a problem of not enough cores.

[imamage]

no, CES is all about bobcat, not bulldozer

Well great job with Bobcat

[JF-AMD]

lol, grats for making a non-car analogy
and shame on you for having a girl in every city you travel too

Not sure my wife would like that strategy

You have no idea what you talking about. Have you?
Your comparisions are really wrong and misleading.
Interleaved hyperthreading (only one thread at time can be actived on each core) is used only in itanium. All x86 hyperthreaded cores can really handle 2 threads at time (depending on available execution resources). But since in most cases there are available execution resources (a single thread rarely utilize even 70% of available core execution resources), so HT mostly shows positive effect. This is really simple and elegant way to utilize resources which are already in place but not used.

When you have 70% of your pipeline filled, you have 30% available for the second thread. But in really efficient code, if you have 90% filled, 10% is available, and there are cases, like Linpack, where HT gives you negative performance increase because the overhead of managing cache and threads is greater than the benefit from performance.

HOLD ON...

If the desktop version of BD, Zambezi will be here in April, the server parts should arrive a few months prior correct? Can we expect Interlagos in February?

Desktop in Q2
Server in Q2

That is all AMD has said.

Does this mean they are confident as to BD's desktop performance? It looks like another server-biased chip really. With 8 physical cores, it should surprise us though.

That just means that their cycles lined up ahead of theirs. Who goes first is based on schedules.

People get caught up in believing that there is some consistent relationship between who launches first, but it is more tied to readiness and launch opportunities than to some pre-determined order.

[FlanK3r]

I heard only, first will be now desktop and server later.

[Aerwidh]

he has a job as a part-time intel cpu down at the grocery store down the road

Best laugh I've had all week!

Thanks, friend!

[bamtan2]

amd should and had better be rushing bulldozer desktop. sandy bridge overclocking to 4.7ghz makes everything else look retarded unless you are on the fringes. intel project selling a bajillion of them and with people coming out of a recession, if amd doesn't get the new sales, they might just miss the boat.

[andos]

Take a look at this.

[FlanK3r]

logo Phenom FX is strange...loks it as fake (logo)

PS: I hate fakers!

[zalbard]

@ andos: source?

[jeremyshaw]

It's hosted from somebodies facebook account, that's all I know from the URL.

[flippin_waffles]

Can never tell what that 3.5ghz+ means.

http://www.semiaccurate.com/forums/s...8&postcount=72

[kuroikenshi]

Best laugh I've had all week!

Thanks, friend!

Thanks, I try to liven up the forums every now and then, I also tried by modding that G1 killer board, but noone like it


Thanks J-F for all that, I think I will upgrade to dusty bridge for the first part of the year until 2nd gen BD is released, maybe late this year, who knows,

[andos]

@ andos: source?

AMD's own facebook fanpage. They posted about 33 pictures from CES 2011.

No fake, unless AMD faked it themselves... lolz