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E6400 vs E6600 - Page 2

post #11 of 32
The E6300 & E6400 have a 7x multi & the E6600 has an 8x multi. That's why they overclock better. It has nothing to do with the 2 extra megs of cashe or any of the other stuff you guys mentioned.
    
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post #12 of 32
Uh, no.

The E63 has a 7x... the E64 has an 8x and the E66 has a 9x multi.

And also, the 2 megs of cache help a lot in certain applications. (transcoding etc)
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post #13 of 32
Quote:
Originally Posted by Wink View Post
thats because you have a E6400 and not a REAL Conroe.. n00b!

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post #14 of 32
Actually, the E6400 isn't a Conroe. It's an Allendale. For that matter, a Kentsfield isn't a Conroe either. What they all have in common is the architecture, Core 2. Why do we call Core 2 Conroe? I guess 'cause the first Core 2 chip tested/benched was a Conroe core, and 'cause it sounds cooler.
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post #15 of 32
Thread Starter 
Quote:
Originally Posted by Syrillian View Post
lol, I feel your pain
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post #16 of 32
Quote:
Originally Posted by Ihatethedukes View Post
Uh, no.

The E63 has a 7x... the E64 has an 8x and the E66 has a 9x multi.

And also, the 2 megs of cache help a lot in certain applications. (transcoding etc)
Well with that being said I was an AMD guy for YEARS

Anyways it's because of the multi difference.
    
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post #17 of 32
It's the cache. Makes a fair difference. For example that's why you see inferior SuperPI times on overclocked sub-6600 CPU's, as compared to 6600 + CPU's.
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post #18 of 32
Quote:
Originally Posted by Wink View Post
lol, I feel your pain
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post #19 of 32
Quote:
Originally Posted by money11465 View Post
Actually, the E6400 isn't a Conroe. It's an Allendale. For that matter, a Kentsfield isn't a Conroe either. What they all have in common is the architecture, Core 2. Why do we call Core 2 Conroe? I guess 'cause the first Core 2 chip tested/benched was a Conroe core, and 'cause it sounds cooler.
Wrong about the Allendale part.

Quote:
http://en.wikipedia.org/wiki/Core2:
All Conroe processors have 4 MB L2 cache; however, the E6300 and E6400 versions have half their cache disabled, leaving them with only 2 MB of usable L2 cache.
The lower end E6300 (1.86 GHz) and E6400 (2.13 GHz), both with a 1066 MT/s FSB, were released on July 27, 2006. Traditionally, CPUs of the same family with less cache simply have the unavailable cache disabled, since this allows parts that fail quality control to be sold at a lower rating.
"Allendale is a code name for a different cpu. The E6300/6400 are Conroe because they physically have 4mb L2 cache, they just have half their physical memory disabled. Typically processors in the same family with less cache just have the unavailable cache disabled, thus allowing pieces that fail QC to be sold at a lower rating. Real Allendale CPU's with native 2MB L2 cache (E4300), are supposed to release next year (Q1 '07). This is apparently causing a bit of confusion as half the market says the e6300 and e6400 are Allendale, and half say Allendale won't be releasing until the e4300."
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post #20 of 32
For all E6600 who think their chip is MUCH faster than an E6400 at the same speed, sadly, you're wrong.

The 2MB more of cache helps by about 3-5% in mostly desktop applications. The reason you see SuperPI jumps is because the program can run INSIDE the L2 cache much easier. For the same reason DDR2 runs SuperPI better the higher the bandwidth. SuperPI runs better with high mhz RAM and big L2. SuperPI is by no means a good indicator for real world performance. It's a 100% synthetic benchmark that is easily manipulated to yield high results.

ckp64 is correct. The allendales ARE conroes with disabled cache. The allendales are also more overclockable than the conroes. People seem to think that the Conroe core is better at overclocking. Let me put this into perspective. What's easier, running a 6300 at 3.3ghz stable or running a conroe at 3.9ghz stable?

6300 stock = 1.8
6600 stock - 2.4

6300 at 3.3 = 1.5ghz oc. 6600 at 3.9 = 1.5ghz oc.

There you have it.
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