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(PCM) Leaked dutch FX 8150 review! - Page 19  

post #181 of 448
Quote:
Originally Posted by 996gt2 View Post
It's slightly faster than the 2500K in heavily multithreaded applications, but much slower in single-threaded performance.

Bulldozer needs twice as many cores and a higher clock speed to slightly beat a 2500K in multithreaded performance. But it's still about 50% slower in single threaded performance.


Cinebench 10 single-threaded score:
FX8150: 4074
Nehalem i7 965: ~4900
2500K/2600K: ~5800

Multi-threaded:
FX8150: 20615
2500k: ~18615

i7 965: ~19600
2600k: ~22615
Exactly! It's basically a PhenomII X8!
post #182 of 448
Quote:
Originally Posted by black96ws6 View Post
Exactly! It's basically a PhenomII X8!
More like Phenom II X7 actually. (since the 8C/4M don't scale as well as the Phenom II cores do).
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post #183 of 448
Quote:
Originally Posted by Jagged_Steel View Post
AFAIK all of the BD series chips 81/61/4100 are made as 8 core (4 module) chips. Chips with invalid or low performing cores are used to create the models with 6 and 4 cores, i.e. the 6100 and 4100, respectively. Presumably there are enough CPUs culled from 8 core viability to meet orders for 4 and 6 core BDs. If there was a mad rush for 4100s and they needed to make 4100s out of chips with all 8 cores usable to meet orders , THEN you would have a situation where 4100s might be able to fully unlock to 8 cores. This is exactly the same way current AMD proccessors are binned as 4 or 2 (and 6/3)core units using the same die. My 555 is a 955 with a flaw in 1 core. It was programmed to operate using 2 good cores- but I can open up the other 2- one of them having errors.
Ask yourself, why would AMD deliberately waste that much silicon, I could see them lasering off bad core to make 6 cores and 4 cores. but why waste the silicon to make a 4core ? Hell it doesn't make any sense, you get nearly double the yield per wafer making dedicated 4 core 2 module cpu's by going the way I suggested, so yields would be better period.

I really doubt AMD is going to make unlockable 4 cores, 6 cores however I fully expect to be fialed 8cores. just from a layout perspective.

your counter point makes no sense. as a manufacturer, I wouldn't do it, why would AMD ? thats a waste of money.
post #184 of 448
If games and applications used as many threads as possible, the performance would be much better. AMD is betting on highly threaded applications and games which is a bit premature at this point (still) but I'm betting BF3 will run great and most likely as fast or faster than a 2600k if the game really does take advantage of as many cores as possible. BC2 should run well also but I'm pretty sure it's locked down to 6 threads.
Edited by pengs - 10/6/11 at 11:08am
post #185 of 448
Quote:
Originally Posted by Iceman23 View Post
Source?
Source? Not sure what you are fishing for, but AMD has been making multi-core cpus and designing them so that units with low performance or invalid cores can be used with the cores that do function for quite some time. 555 is a 955 with 2 cores disabled- for instance. The fact that all of the BD series have the same amount of L3 cache (huge amount of diespace)indicates that they are using the same die for all of them and disabling selected modules to create the 4 and 6 core models. This is exactly the same as AMDs current strategy. That is, an imperfect chip does not always mean trash, it usually means a product of lower value. $87 for a 555 (from a culled $120 955 with one bad core) is a heck of a lot better profit than $0 for tossing every chip with 1 flaw ( LOTS of chips) in the trash.
Edited by Jagged_Steel - 10/6/11 at 11:22am
    
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post #186 of 448
Quote:
Originally Posted by Madmanden View Post
More like Phenom II X7 actually. (since the 8C/4M don't scale as well as the Phenom II cores do).
Actually, phenom II X7 would better if it has similar clock speed to BD because PII has better IPC
post #187 of 448
Quote:
Originally Posted by SCollins View Post
Ask yourself, why would AMD deliberately waste that much silicon, I could see them lasering off bad core to make 6 cores and 4 cores. but why waste the silicon to make a 4core ? Hell it doesn't make any sense, you get nearly double the yield per wafer making dedicated 4 core 2 module cpu's by going the way I suggested, so yields would be better period.

I really doubt AMD is going to make unlockable 4 cores, 6 cores however I fully expect to be fialed 8cores. just from a layout perspective.

your counter point makes no sense. as a manufacturer, I wouldn't do it, why would AMD ? thats a waste of money.
You are looking at the problem and process of making chips incorrectly. A certain amount of chips on any wafer will have defects in them, using current production methods. Many times a defect will affect only a certain portion of a chip. By designing the chip so that all or some lessor quantity of the cores can be used has been AMDs design philosophy for a long time now- that is what the whole "unlocking " craze is all about. So, a 4 core chip with a flaw in 1 core is programmed to function with 2 of the good cores- this is exactly my situation with my 555 (955 with a flaw in 1 core). My guess is that AMD is continuing with this philosophy with the BD series.
    
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post #188 of 448
Well hello there SB-E
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post #189 of 448
IPC goes down with Bulldozer, said that before(and got written off instantly), and i'll say it again. Pressdeck kits have been sent out to all reviewers, i'm willing to bet this is legit. Please keep in mind that the press kits include a CH5 with latest BIOS and AGESA. I'll reserve my final judgement for more legitimate sources, it is HIGHLY ironic that this review is 100% in line with every other leak...

SCollins and FormulaM, please go back to AMDZone and quit trolling so hard. Thanks.
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post #190 of 448
Thread Starter 
Quote:
Originally Posted by Icekilla View Post
Well hello there SB-E
Yeah that has a bug in c1 revision

I c it like this:

1) People with loads of cash are gonna get sb-e
2) People that want high performace now will get i7 2600k and upgrade to ivy.
3) People that want price/performace gonna get the FX, it keeps getting faster later on when games and programs gonna support more threads and its new cpu instructions.

Long term FX is the winner.
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Overclock.net › Forums › Industry News › Rumors and Unconfirmed Articles › (PCM) Leaked dutch FX 8150 review!