intel skylake cpu with DDR3 serious issue

[ARBAO]

hi there

i am using intel skylake 6500 cpu with DDR3 1.5V memory module

intel announced that the skylake cpu is better not work with ddr3 1.5V
or the cpu may shorter the internal memory controller lifespan??

any one knows that the intel skylake internal memory controller default voltage ?

i noticed that the system agent voltage of my computer is 1.064V

is the system agent voltage equal to memory controller voltage?

if it so ... is 1.064V normal operating voltage for my computer??

pls help

 

[SPBHM]

keep in mind that officially you should also not use DDR4 faster than 2133 and a lot of people are using 3200+ with skylake I think...

Asus seems to validate some 1.65V DDR3 for their z170 board, so i wouldn't worry much.
http://dlcdnet.asus.com/pub/ASUS/mb/LGA1151/Z170-P-D3/Z170-P_D3_DRAM_QVL.pdf

but it would be interesting to get more sources, tests...

 

[ARBAO]

keep in mind that officially you should also not use DDR4 faster than 2133 and a lot of people are using 3200+ with skylake I think...

Asus seems to validate some 1.65V DDR3 for their z170 board, so i wouldn't worry much.
http://dlcdnet.asus.com/pub/ASUS/mb/LGA1151/Z170-P-D3/Z170-P_D3_DRAM_QVL.pdf

but it would be interesting to get more sources, tests...

hi there,
are u using the skylake cpu with DDR3 1.5V memory??

 

[ARBAO]

is the system agent voltage equal to memory controller voltage?

if it so ... is 1.064V normal operating voltage for my computer??

 

[ARBAO]

can anyone help T.T ???

 

[LTC8K6]

No, there is a DRAM voltage setting.

 

[NTMBK]

can anyone help T.T ???

Your post was up for less than an hour, at a time when most of the English-speaking world was asleep. Calm down!

 

[sm625]

You must have read this article:

http://www.kitguru.net/components/m...emory-at-default-voltages-can-damage-skylake/

For a long time now Intel has stated that you should be using DDR3 modules with 1.35V max ratings with skylake.

 

[Magic Carpet]

For a long time now Intel has stated that you should be using DDR3 modules with 1.35V max ratings with skylake.

Unofficially, you can even use 1.65V rated DIMMs with Skylake. Here is the memory compatibility list for an asus board. I suspect, ASUS considers it "safe" enough.

Personally, I wouldn't mess with Skylake at all, unless I had a really good kit (high speed, low voltage) of DDR4 RAM. None exists yet (hopefully there will be some by the time Skylake-E gets released)... And running Skylake on DDR3 is a waste imo. Staying with my 4770K for now.

 

[Fjodor2001]

You must have read this article:

http://www.kitguru.net/components/m...emory-at-default-voltages-can-damage-skylake/

For a long time now Intel has stated that you should be using DDR3 modules with 1.35V max ratings with skylake.

Tom's also has an article on it:

http://www.tomshardware.com/news/skylake-memory-support,30185.html#xtor=RSS-181

When Skylake was released, Intel announced the move to the new DDR4 standard while maintaining limited support for DDR3. Initially, evidence indicated that Skylake could support only DDR3L, but since that time, motherboard OEMs have listed support for non-DDR3L RAM, which raised obvious questions. After speaking with Intel about the issue, we finally know the truth about what RAM Intel's integrated memory controller (IMC) can support.

Skylake's IMC officially supports only DDR3L with a voltage of 1.35, and it officially supports DDR4 at 1.2 V. This might seem a little counter-intuitive to some users, as the entire reason for continuing DDR3 support is to make it cheaper and easier for customers to upgrade to the new Skylake platform, but these voltages are likely used to avoid damaging the IMC. Although it would be nice to use any DDR3 from 1.35 V - 1.65 V, running at these higher voltages could burn out the IMC and kill the processor over time.

If this is the case, though, then why do OEMs such as Gigabyte support DDR3 at 1.5 V on some of their motherboards? And why do others such as Asus and ASRock support DDR3 at 1.65 V? RAM running at these voltages might be capable of operating on the motherboard without causing damage to the board itself, but again, over time it will likely damage the CPU. So if you don't have DDR3L on hand, you are probably better off to go ahead and spring for the more expensive DDR4.

I wonder if this limitation was intentional by Intel, or if it was a mistake found too late to fix. Why intentionally limit it to 1.35V?

 

[Ken g6]

I wonder if this limitation was intentional by Intel, or if it was a mistake found too late to fix. Why intentionally limit it to 1.35V?

Somebody mentioned in another thread that, like OCed DDR3 is rated at up to 1.65V, OCed DDR4 is rated at up to 1.35V. Which just happens to coincide with DDR3L. So DDR3 support may have been an afterthought.

@OP, I'd downclock the DDR3 to 1333MHz, and then lower the voltage as long as memtest keeps saying the RAM is working. Even 1.45V or 1.4V is better than 1.5V.

 

[iSkylaker]

This is actually good to know for me, I'm about to order my board and was considering staying on DDR3 for the time being since I have some DDR3 sticks laying around. The DDR4 version is just an extra 5-6$ over the one I was planning to get with same features.

 

[zir_blazer]

Do someone knows if the I/O Voltage is the same than what the DRAM ICs gets or not? Since I recall to read somewhere on Intel documentation for Haswell that it "supports DDR3L at 1.35V with 1.5V I/O" or something like that. Basically, I don't know if there is a relation between the Voltage that the module receives, and how it talks with the IMC. They may not be related at all.