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Is it possible enable 4MB cache on Allendale?

post #1 of 9
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I've been reding up a little on the Allendale CPU which has a default cache of 2MB and apparently it appears to have 4MB cache on the die itself though half of it is disabled. I've also come across a couple of posts from people who have stated they have 4MB versions and heard runours that it's possible to enable the extra cache on the CPU somehow.

In a nutshell, does anyway here know if these claims are true or is what I've seen a load of old cods wollop?
post #2 of 9
The other half of the cache is usually bad, thats why its disabled
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post #3 of 9
Probably Intel has just been getting lazy/careless.

The cache is on the die, like you said - just disabled. Possible.
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post #4 of 9
There may be a way, but it probably requires a lot of knowledge and machinery. Chances of failure are probably high. Cheaper to get a 6600.
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post #5 of 9
I assume it is cut on the microscopic scale so it is probably not possible. To do it... you would need to remove the heatspreader. Remove the die surface. Have the chip layout. Use a microscope and a micro solder... Yeah... I doubt it is possible. Even if it was possible, the additional cache would be bad. This is why it was disable and not sold as a higher end chip.
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post #6 of 9
not necessarily. the old AMD durons had disabled cache, and a simple pencil mod would enable the extra cache and turn it into an athlon. I have never heard of one having bad cache. I doubt that the Allendales have bad cache, but i'm sure it would still be harder to enable than a pencil mod.
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post #7 of 9
I doubt that Allendales have the extra cache. Cache is expensive and why would Intel waste money like that? I don't think so.

This is not like HTT where HTT was an extension so it was possible to enabled an extension. But a physical part of the CPU? nah!
post #8 of 9
Quote:
Originally Posted by Nasgul View Post
I doubt that Allendales have the extra cache. Cache is expensive and why would Intel waste money like that? I don't think so.

This is not like HTT where HTT was an extension so it was possible to enabled an extension. But a physical part of the CPU? nah!
I have a feeling that certain chips which were fabbed as true Conroes and ended up with bad on-die memory were relegated to Allendales and thus the disabled cache. Either way Intel would be making money rather than tossing the chips.

It was the same for some AMD chips as well. Some Toledos which had disabled L2 cache and were appropriately named Manchester due to the disabled cache.

I could be wrong, but just a thought.
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post #9 of 9
I like the question

First, there is some truth in the specified claims about Allendale Core processors containing 4096KB L2 ECC cache.

Allendale cores, if manufactured to be Allendale cores themselves, will not contain 4096KB L2 cache (including 2MB disabled). They will contain the 2048KB L2 cache that they have been designed with, and the additional 2MB L2 will not be present on the physical chip.

If a Core 2 Duo E6600 (or greater) is unable to operate at the required clock frequency the chip itself can be reduced the E6300/E6400 part, and therefore Intel will disable half the 4MB L2 cache.

Please be aware that if this is the case you will have the ability, depending on your skill, of reactivating the additional half of the Main L2 Cache Array.

If a Core 2 Duo E6600 (or greater) is unable to correctly address (or contains a manufacturing fault) the 4096KB L2 cache, then half of this system will be disabled. Obviously you can attempt to reactivate the additional cache, but it will not obviously work.

The choice is yours, you have a fairly high risk of doing physical damage to the internal components of the processor if you tamper with it to this engineering level.
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