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AMD FX Bulldozer 128 bit !

post #1 of 13
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Hi ,,, I found Bulldozer is already new instructures 128bit.

http://www.brightsideofnews.com/news/2009/4/15/amds-next-gen-bulldozer-is-a-128-bit-crunching-monster.aspx?pageid=0

What BD going on new OS W8 or W9 already IA128bit [support 32/64] ?
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post #2 of 13
There is absolutely no reason for a 128bit CPU when you don't even have software coded for it.

Bulldozer is a 32/64 bit processor.
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post #3 of 13
Ha! I don't even think Windows 8 will be 128bits, But i guess they are thinking 'Future is Fusion' stuff
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post #4 of 13
Quote:
Originally Posted by Phil~;15365978 
There is absolutely no reason for a 128bit CPU when you don't even have software coded for it.

That is what people said about the AMD 64 when it was released and it rocked.
post #5 of 13
SSE has been 128-bit for years, and both Bulldozer and Sandy Bridge are capable of executing 256-bit AVX instructions.
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post #6 of 13
Quote:
Originally Posted by Slappy Mcgee;15365996 
That is what people said about the AMD 64 when it was released and it rocked.

Yes, that is the reason why 60% of most apps are still chugging along using 32 bit instructions. That is set to change though, with Win7 being so compliant with 64bit. A few years ago it was irritating to search for 64bit drivers.

With
Quote:
Originally Posted by Blameless;15365999 
SSE has been 128-bit for years, and both Bulldozer and Sandy Bridge are capable of executing 256-bit AVX instructions.

True. But if the actual processor architecture was 128 bit, it would be able to address far larger amounts of memory/bandwidth. And while I am no expert on this, I expect 128 bit would require a larger die. And to take advantage of the larger address space, you would obviously need software to support it.
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post #7 of 13
Quote:
Originally Posted by Phil~;15366174 
True. But if the actual processor architecture was 128 bit, it would be able to address far larger amounts of memory/bandwidth. And while I am no expert on this, I expect 128 bit would require a larger die. And to take advantage of the larger address space, you would obviously need software to support it.

128-bit general purpose registers would indeed require more transistors.

Bandwidth wouldn't necessarily change.

And 64-bit is not remotely a limiting factor in the amount of memory that can realistically be addressed at this point. While most x86-64 implimnetations are limited to 40 or 48 bit physical addressing, this could be expanded to the the full 64-bits, which would mean ~18.45 exabytes of memory would be supported.

I honestly do not think more than 18,000,000 TB of memory will really be useful within at least the next 10 years.

To put just how large 64-bit adressing is into perspective:

http://cnx.org/content/m13082/latest/
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post #8 of 13
Quote:
Originally Posted by Phil~;15366174 
Yes, that is the reason why 60% of most apps are still chugging along using 32 bit instructions. That is set to change though, with Win7 being so compliant with 64bit. A few years ago it was irritating to search for 64bit drivers.

It takes time to change that, but look at the preformance increase on databases and the possibility to have more ram, and so on. It didn't take all that long.

Crappy desktop apps that no one want to take the cost to lift to new architecture are used because "they still work". We're living with many legacy software, because right now it isn't worth the cost do re-develop - since the still work and work well enough.
post #9 of 13
Quote:
Originally Posted by Phil~;15365978 
There is absolutely no reason for a 128bit CPU when you don't even have software coded for it.

Bulldozer is a 32/64 bit processor.

well of course, but why would someone even attempt to code 128bit software if there is no CPU that can run it? Chicken or the egg. Something had to come first. Would we have ANY 64 bit apps today if we didn't have 64 bit CPUs come out first?
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post #10 of 13
128-bit? Is this going to be an extension of x86 or something independent like IA64?
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