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Any news on RAM requirements for IB?

Puppies04

Puppies04

Diamond Member
As far as I am aware the reason SB only officially supports 1.5V RAM (+5% max) is to do with keeping the difference between the Vcore (or is it memory controller voltage) and RAM voltage under .5v.

With that in mind and also assuming that IBs smaller manufacturing process will bring with it a Vcore drop (common sense?), will the new CPUs require lower than 1.5V RAM?
 
I thought I read that SB will support 1.35V RAM. But just like SB, it should also support RAM up to 1.65V as well.

Also, IB will support RAM in 200mhz increments, as opposed to the SB 266mhz increments. Meaning that we would be looking at 1600, 1800, 2000, and 2200 as compared to the 1600, 1866, 2133 speeds on SB.
 
I haven't seen or heard anything official yet on the memory front. Since the next generation Intel Core processors are a die shrink I would think the memory would stay the same and maybe include DDR 3 1600 support. The 2nd generation Intel® Core™ processors support memory at 1.5 ±5% (1.425v to 1.575v). If you put higher voltage memory (i.e. 1.65v +) in it will likely try to drop the voltage down to 1.5v and not give you as good of performance.
 
IntelEnthusiast said:
I haven't seen or heard anything official yet on the memory front. Since the next generation Intel Core processors are a die shrink I would think the memory would stay the same and maybe include DDR 3 1600 support. The 2nd generation Intel® Core™ processors support memory at 1.5 ±5% (1.425v to 1.575v). If you put higher voltage memory (i.e. 1.65v +) in it will likely try to drop the voltage down to 1.5v and not give you as good of performance.
Click to expand...

So are you saying intels own memory profile that they developed will burn out there cpus?

On intel site the show support for 2133 profiles at 1.65 volts
 
grkM3 said:
So are you saying intels own memory profile that they developed will burn out there cpus? On intel site the show support for 2133 profiles at 1.65 volts
Click to expand...

There has been a lot of confusion over this all over the web. The fact is intels 2nd generation "I" CPU data sheet shows exactly what Intelenthusiast is saying 1.5v +/-5% I.E 1.425-1.575. I take anything else with a grain of salt until I see an official update from intel explaining the discrepancy (better to err on the side of caution)

Back to my original point though, either...

* The whole "keep the voltages within .5v of each other is rubbish
* IB CPU voltages will be about the same as SB
* The memory controller on IB is more robust and can handle a greater disparity between the 2 voltages.
* IB will require lower rated DIMMS

On a side note


IntelEnthusiast said:
If you put higher voltage memory (i.e. 1.65v +) in it will likely try to drop the voltage down to 1.5v and not give you as good of performance.
Click to expand...

I haven't heard of this happening to anyone, infact it is the exact opposite. There are several reports I have seen of 1.5v rated DIMMS being set at 1.65v by 1155 mobos. Where would an end user stand if this was the case. I presume it is down to the person who builds the machine to check voltages but surely the mobo manufacturers are at least part to blame.
 
http://www.intel.com/content/www/us/en/processors/core/2nd-gen-core-desktop-vol-1-datasheet.html Page 11 System supported memory

• Two channels of unbuffered DDR3 memory with a maximum of two UDIMMs or SO-DIMMs (for AIO) per channel
• Single-channel and dual-channel memory organization modes• Data burst length of eight for all memory organization modes
• Memory DDR3 data transfer rates of 1066 MT/s and 1333 MT/s
• 64-bit wide channels
• DDR3 I/O Voltage of 1.5 V

The engineer that I spoke to about this issue said that the board should default to 1.5v if you were to put higher voltage memory in. Of course he was speaking about Intel boards so other motherboard manufacturers' boards may not do this.

I have talked to a lot of people on our products about the only time that I have heard of any of the 2nd generation Intel® Core™ processors going back in almost every case had to do with them using memory that was rated at 1.65v or higher. I haven't heard that with DDR 3 1600 or even 1833 if it was running at 1.5v. Since motherboards list what the board supports and not what the processor supports I have worked to make sure that I bring this up every chance that I can. With the memory controller located on the processor keeping the voltages at support levels is very important to keeping your processor running, even overclocked, for a long time.
 
IntelEnthusiast said:
http://www.intel.com/content/www/us/en/processors/core/2nd-gen-core-desktop-vol-1-datasheet.html Page 11 System supported memory

• Two channels of unbuffered DDR3 memory with a maximum of two UDIMMs or SO-DIMMs (for AIO) per channel
• Single-channel and dual-channel memory organization modes• Data burst length of eight for all memory organization modes
• Memory DDR3 data transfer rates of 1066 MT/s and 1333 MT/s
• 64-bit wide channels
• DDR3 I/O Voltage of 1.5 V

The engineer that I spoke to about this issue said that the board should default to 1.5v if you were to put higher voltage memory in. Of course he was speaking about Intel boards so other motherboard manufacturers' boards may not do this.

I have talked to a lot of people on our products about the only time that I have heard of any of the 2nd generation Intel® Core™ processors going back in almost every case had to do with them using memory that was rated at 1.65v or higher. I haven't heard that with DDR 3 1600 or even 1833 if it was running at 1.5v. Since motherboards list what the board supports and not what the processor supports I have worked to make sure that I bring this up every chance that I can. With the memory controller located on the processor keeping the voltages at support levels is very important to keeping your processor running, even overclocked, for a long time.
Click to expand...

I completly agree, unfortunatly there are people out there in the big wide web who are telling everyone who will listen 1.65v RAM is fine and even advocating overvolting it to make it even faster. The supplier I buy all my components was even selling bundles with SB chips and 1.65v DIMMS. I pointed out the error and they stopped doing it but within 2 weeks they started selling them again quoting some unknown source at intel who said it was fine....
 
intel made a memory profile that runs the memory controller at 1.65 this profile came right from intel xmp that they made.i have asked you this before and never got an answer to if 1.65 is bad then why did intel make that profile?

The 2133 profile comes from intel and not the board makers.
 
grkM3 said:
intel made a memory profile that runs the memory controller at 1.65 this profile came right from intel xmp that they made.i have asked you this before and never got an answer to if 1.65 is bad then why did intel make that profile?

The 2133 profile comes from intel and not the board makers.
Click to expand...

I keep seeing this posted and have to ask, why does 2133 have to mean 1.65v when there are 2133 1.5v kits avaliable. Maybe the 1.65v was a typo in that one instance or the kits were listed by mistake which makes a whole lot more sense to me than intel suddenly changing the rated RAM voltage of an entire series of cpus on a whim.
 
The xmp profile sets the ram timings and voltage.there are many diffetent profiles that they made and most run at 1.65.some run 1.6 and sone even at 1.55 with looser timings.

The issue here is that intel set these xtreme memory profiles and list witch boards and bios are supported.they even list what specific sticks are supported.

There is to many places where they list 1 65 to be a mistake
 
grkM3 said:
The xmp profile sets the ram timings and voltage.there are many diffetent profiles that they made and most run at 1.65.some run 1.6 and sone even at 1.55 with looser timings.

The issue here is that intel set these xtreme memory profiles and list witch boards and bios are supported.they even list what specific sticks are supported.

There is to many places where they list 1 65 to be a mistake
Click to expand...

I see, thanks for clearing that up for me. I will await IntelEnthusiasts return with what is hopefully a final answer then.

And now to go a bit offtopic.....

How are your SLI'd 560TIs performing i was thinking about sticking another one in mine as a friend might have one for sale (feel free to PM a response if you have time so we don't go completly offtopic here 😀)
 
Ratman6161 said:
The JDEC standard for ddr3 is 1.5v. there are also low voltage standards at 1.35 and 1.25. "what Intelenthusiast is saying 1.5v +/-5% I.E 1.425-1.575." is exactly the JDEC standard. Do Intel is just telling you to run it within the standard voltage.

http://en.wikipedia.org/wiki/DDR3_SDRAM
Click to expand...

google intel extreme memory profile

this is taken right off intel.com

Intel® Extreme Memory Profile (Intel® XMP) is a performance-packed expansion of the standard DDR3 memory specification. It enables a robust, overclocking solution designed to take advantage of the mega-gaming features built into Intel® technology-based PCs. If you like to overclock and squeeze every possible ounce of performance from your PC, then memory based on Intel XMP is the solution you need to fully dominate–without breaking a sweat.1
Designed for ultimate flexibility, Intel XMP-based platforms offer major advantages for pro gamers, novices, and everyone in between. With predefined and certified memory optimizations built into Intel® XMP, overclocking on Intel technology-based PCs is easy right out of the box. Expert users still have the option of manually changing specific parameters for personalized fine-tuning.

Here is my ram,its listed on intel.com as compatible with my 2600k and also says my mother board is compatible.To go even further they give the xmp profile to gskil and its coming right from intel.

xmpw.jpg
 
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I think the introduction of 1.35V RAMs for IB were meant for Ultrabooks for the miniscule amount of power they could save. The 1.35V is applicable for desktops also but considering that 1.35 RAMs are quite expensive per GB, many would still go for 1.5V.

As for 1.65V, I'm still wondering if I should tweak it to near 1.5V by reducing speeds on my Kingston HyperX Genesis RAMs meant for the IB. :hmm:
 
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