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[AnandTech] Crucial Demonstrates DDR4-2133 Modules - Page 3

post #21 of 52
Quote:
Originally Posted by DuckieHo View Post

Try installing RAM in a SFF build with one hand under a HDD...
Instead of pushing in a 284 pins simutaneously, you are pushing in about half.... so mechanical force is reduced by about half.
Dual/triple/quad channels are functions of the memory controller, not the RAM. The point of multi-channel memory is a wider memory bus:
Single = 64-bit
Dual = 128-bit
Triple = 192-bit
Quad = 256-bit

DDR4 will be changing the topography of RAM though. It will move to high-frequency point-to-point (like PCIe) instead of the existing T-Tree or Fly-by topography.


Memory bandwidth is needed on certain non-consumer workloads. It will also be needed as iGPUs get better. The other benefits of DDR4 is lower power consumption and greater densities.

great info, thanks biggrin.gif
    
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post #22 of 52
What's with it being 2133?

Doesn't only something like llanos apu benefit from the higher frequency?
post #23 of 52
I'd say DDR4 is further than a year away. If Ivy Bridge-E is coming out Q3 2013 there's no way in hell DDR4 is coming to even the most extreme desktop chipsets any sooner than Q3 of 2014. Intel wouldn't make DDR4 available on Broadwell before it's available on their enthusiast level chipsets, plain and simple.

Your likely going to see DDR4 from Skylake, Haswell-E and AMD's Excavator near 2015. I say this because during that time-frame is when Intel will be dropping a replacement for LGA 1150 and LGA 2011 and when AMD will be working on dropping Excavator and likely be replacing AM3+ AND FM2. It just makes sense.

Think of it like DDR3, it began getting demoed back in 2005, however it didn't hit the shelves until 2007 and it didn't become the real "Norm" until 2009. DDR4 is being demoed in 2013, will probably arrive in 2015 and become the norm a year or two after.
Edited by M3T4LM4N222 - 1/15/13 at 2:10am
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post #24 of 52
I could understand if it were cheaper to manufacture but even the quad channel memory on X79 is pretty useless for consumers, just have a look at the performance difference between dual, triple (X58) and quad channels! We aren't yet hurting on the memory bandwidth performance on today's DDR3, DDR3 is more than enough for a couple more years.
post #25 of 52
Quote:
Originally Posted by sherlock View Post

They will likely make a lot of money off the early adapters(Haswell-E users) just like they did during the first few years of DDR3.

my core 2 quad uses ddr3 biggrin.gif not that it is performance advantage but, what was expensive then is cheap now.
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post #26 of 52
Quote:
Originally Posted by Systemlord View Post

I could understand if it were cheaper to manufacture but even the quad channel memory on X79 is pretty useless for consumers, just have a look at the performance difference between dual, triple (X58) and quad channels! We aren't yet hurting on the memory bandwidth performance on today's DDR3, DDR3 is more than enough for a couple more years.

I know this is hard to understand, but we as enthusiasts are not the bleeding edge.

We get Enterprise's cast offs and rejects. They will benefit from DDR4. By the time we will find a use for it, it'll be there for us after running it's course in servers first. thumb.gif
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post #27 of 52
Why are we not going to QDR?

If intel was able to quad pump a fsb years ago, why not memory?

Or at least do something like what is done to make GDDR5 somewhat quad pumped.
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post #28 of 52
Quote:
Originally Posted by gsa700 View Post

Will this ddr4 continue the "dual/triple/quad channel" method or will there be a more substantial shift to a wider memory bus or maybe a shared bus on a single channel?

The reason I ask is related to the "fact" that memory speed doesn't seem to increase performance so much on Sandy and Ivy, so is there some other bottleneck that could be improved by ddr4?

Different topology. DDR4 does away with channels and replaces it with point-to-point memory addressing.
Quote:
Originally Posted by cdoublejj View Post

my core 2 quad uses ddr3 biggrin.gif not that it is performance advantage but, what was expensive then is cheap now.

I remember pay $350 for 8GB of RAM when I got my Q6600. =(
Quote:
Originally Posted by GetX View Post

What's with it being 2133?

Doesn't only something like llanos apu benefit from the higher frequency?

No, not at all. Higher frequency memory drastically increases PC performance. What you said was originally thought to be true due to the IMC, but has since been disproven.
Edited by Shmerrick - 1/15/13 at 5:31am
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post #29 of 52
Quote:
Originally Posted by Shmerrick View Post


No, not at all. Higher frequency memory drastically increases PC performance. What you said was originally thought to be true due to the IMC, but has since been disproven.

In what way?
There's no way it improves performance that much
post #30 of 52
Quote:
Originally Posted by Systemlord View Post

I could understand if it were cheaper to manufacture but even the quad channel memory on X79 is pretty useless for consumers, just have a look at the performance difference between dual, triple (X58) and quad channels! We aren't yet hurting on the memory bandwidth performance on today's DDR3, DDR3 is more than enough for a couple more years.
DDR4 will provide lower power consumption, higher densities, and faster clocks.

Servers still require all these:
1) Power consumption: With 5TB RAM in rack, even a 0.2w/GB reduction in power would results over 1.5Kw in power and HVAC.
2) Densities: With technology like Hadoop and MemCache, some companies need more memory in their servers.
3) Faster clocks: There are plenty of memory intensive non-consumer applications.
Quote:
Originally Posted by DzillaXx View Post

Why are we not going to QDR?

If intel was able to quad pump a fsb years ago, why not memory?

Or at least do something like what is done to make GDDR5 somewhat quad pumped.
One reason I can think of is that FSB and GDDR5 are integrated technologies. RAM is removable/servicable technologies so there has to be more tolerances.

Quote:
Originally Posted by Shmerrick View Post

Different topology. DDR4 does away with channels and replaces it with point-to-point memory addressing.
DDR4 will still have channels. It's similar in the way that independent PCIe lanes can be combined into x1, x2, x4, x8, x16, and x32.
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