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Windows 7: Adios, DDR3: Micron Says Its DDR4 DRAM Modules Are Coming In 2013

09 May 2012   #11
FuturDreamz

Windows 8 Pro (32-bit)
 
 

Quote   Quote: Originally Posted by carwiz View Post
Quote:
Why should this eliminate prefetch.
Because the memory could possibly be faster than the processor for one. The processor would issue a read and the next step has the data. L1, L2 and L3 cache is the processor's "prefetch" memory.

I think you're confusing processor cache with disk (OS) to memory prefetch buffering. Mostly my fault but I thought we were talking about memory technology. Disk prefetch would still be needed and still remain the bottleneck.
But then wouldn't the processor end up taking more time to look up the address of the data, since it has to figure out where in the entire gigabytes of RAM the important bits are?


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09 May 2012   #12
marsmimar

Microsoft Community Contributor Award Recipient

 
 

Quote   Quote: Originally Posted by pparks1 View Post
But I just future proofed by buying 1TB of DDR3 RAM, and now this!!!. I give up.
Great sig, Patrick.
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09 May 2012   #13
carwiz

Windows 7 Pro-x64
 
 

Quote   Quote: Originally Posted by FuturDreamz View Post
Quote   Quote: Originally Posted by carwiz View Post
Quote:
Why should this eliminate prefetch.
Because the memory could possibly be faster than the processor for one. The processor would issue a read and the next step has the data. L1, L2 and L3 cache is the processor's "prefetch" memory.

I think you're confusing processor cache with disk (OS) to memory prefetch buffering. Mostly my fault but I thought we were talking about memory technology. Disk prefetch would still be needed and still remain the bottleneck.
But then wouldn't the processor end up taking more time to look up the address of the data, since it has to figure out where in the entire gigabytes of RAM the important bits are?
Not necessarily. With ultra-fast memory, the processor would just read the address and the memory controller would present the data. It's that fast! As it is now, the processor has to search through up to four levels of various memory types. The image below-left shows how it is now. Purely conceptual, but on the right would be the new memory configuration. Imagine, if you can, 196+GB of memory that would be 1000 times faster than current L1 cache. (L1 cache is already faster than DRAM but much smaller--On the order of a few MB of on-die memory.)


Attached Thumbnails
Adios, DDR3: Micron Says Its DDR4 DRAM Modules Are Coming In 2013-processor-cache.jpg  
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10 May 2012   #14
Trucidation

 

Well, at least there's something to justify for the Next Big Upgrade (tm).

Now if only MS released that new filesystem they keep putting off...
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10 May 2012   #15
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Cheaper DDR3 as well, for those who don't have to be on the bleeding edge

A Guy
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10 May 2012   #16
LittleJay

Windows 7 Home Premium 64bit SP 1
 
 

Quote   Quote: Originally Posted by A Guy View Post
Cheaper DDR3 as well, for those who don't have to be on the bleeding edge

A Guy
Same here. With my checking account balance, I have to be satisfied with being on the blunt edge.
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10 May 2012   #17
Coke Robot

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by pparks1 View Post
But I just future proofed by buying 1TB of DDR3 RAM, and now this!!!. I give up.
Did I just read this correctly, 1 whole TERABYTE of DDR3 RAM?!
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10 May 2012   #18
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Quote   Quote: Originally Posted by Coke Robot View Post
Quote   Quote: Originally Posted by pparks1 View Post
But I just future proofed by buying 1TB of DDR3 RAM, and now this!!!. I give up.
Did I just read this correctly, 1 whole TERABYTE of DDR3 RAM?!
Tongue in cheek, as opposed to

A Guy
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10 May 2012   #19
Coke Robot

Windows 7 Ultimate x64
 
 

I'm kind of excited for this, but at the same time, meh....

DDR4 in my eyes is like going from DDR2 to DDR3, lower latencies and faster speeds with lower voltages. DDR3 is pretty fine as it is, especially since it's dirt cheap too! This will only affect Windows slates and laptops, servers, and such, not so much desktops. Even then, overclocking DDR3 RAM is really only beneficial if your processor is able to process data swiftly enough for RAM to be operating at 1600MHz. To me, it's better to have more RAM than faster RAM, that's the trade off I make.
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11 May 2012   #20
Trucidation

 

But isn't it the case that most people already have enough RAM? At least, I can't see the need for the average home user to have more than 8GB, and 8GB is dirt cheap (my SSD cost me way more). Having a faster RAM option would certainly be nice.

Also, the cynic in me says prices won't stay low for long, as production ramps to cater to the new type, consequently lowering the supply of the old type and thus driving prices back up.
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 Adios, DDR3: Micron Says Its DDR4 DRAM Modules Are Coming In 2013




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