What is "Memory Type"/"Supported Memory"?

[podkall]

See this: (specification of  i7-12700K on Intel's website)

 

It says up to DDR4 3200, yet Motherboards and RAMs can OC with XMP/D.O.C.P. above 5000Mhz

 

Does Memory Type just mean "guaranteed to run at this frequency but could handle higher"?

 

If my understanding is wrong, and you know better, could you give a helping hand in this thread?:

  

20 minutes ago, kobo.white said:

Hello!

 

Thanks.

[Eigenvektor]

These are the memory profiles officially supported by the CPU. Everything else is an overclock. XMP/DOCP are overclock profiles stored in the RAM stick, that can be enabled automatically.

[podkall]

4 minutes ago, Eigenvektor said:

These are the memory profiles officially supported by the CPU. Everything else is an overclock. XMP/DOCP are overclock profiles stored in the RAM stick, that can be enabled automatically.

What if someone has trouble using XMP/DOCP and gets RAM error codes?

Is there anything the guy in thread I mentioned could be doing wrong?

[CommanderAlex]

4 minutes ago, podkall said:

What if someone has trouble using XMP/DOCP and gets RAM error codes?

Is there anything the guy in thread I mentioned could be doing wrong?

Well if it's giving errors with XMP enabled, try disabling and running tests again (presumably something like memtest86). If it doesn't fail with XMP off, then try setting them manually as XMP profiles can also fail.

 

Then if setting everything manually fails, try the maximum the CPU supports, which should work regardless, unless the IMC is the issue.

[podkall]

Just now, CommanderAlex said:

Well if it's giving errors with XMP enabled, try disabling and running tests again (presumably something like memtest86). If it doesn't fail with XMP off, then try setting them manually as XMP profiles can also fail.

 

Then if setting everything manually fails, try the maximum the CPU supports, which should work regardless, unless the IMC is the issue.

I'm not having issues with XMP, but thanks for explenation.

[CommanderAlex]

Just now, podkall said:

I'm not having issues with XMP, but thanks for explenation.

No problem. I'm currently on that thread now reading over the OP's issue there. 

 

[-rascal-]

43 minutes ago, podkall said:

See this: (specification of  i7-12700K on Intel's website)

 

It says up to DDR4 3200, yet Motherboards and RAMs can OC with XMP/D.O.C.P. above 5000Mhz

 

Does Memory Type just mean "guaranteed to run at this frequency but could handle higher"?

 

If my understanding is wrong, and you know better, could you give a helping hand in this thread?:

  

 

Thanks.

 

So 12th Gen Intel actually physically supports BOTH DDR4 and DDR5.

The Integrated Memory Controller (IMC) inside the CPU works with both DDR4 / DDR5.

HOWEVER, you can't use both DDR4 AND DDR5 at the same time.

Reason why there are "D4" / "DDR4" versions and DDR5 versions of motherboards.

 

The "up to" DDR5-4800 and DDR4-3200 is the maximum "officially supported" Intel spec.

If you go beyond that, either using XMP or manual tweaking, it is considered overclocking.

With overclocking, the "your mileage may vary" applies.

Like...modding a car's engine, you *may* get 500 HP of of your stock 200 HP engine...

[podkall]

4 minutes ago, -rascal- said:

 

So 12th Gen Intel actually physically supports BOTH DDR4 and DDR5.

The Integrated Memory Controller (IMC) inside the CPU works with both DDR4 / DDR5.

HOWEVER, you can't use both DDR4 AND DDR5 at the same time.

Reason why there are "D4" / "DDR4" versions and DDR5 versions of motherboards.

 

The "up to" DDR5-4800 and DDR4-3200 is the maximum "officially supported" Intel spec.

If you go beyond that, either using XMP or manual tweaking, it is considered overclocking.

With overclocking, the "your mileage may vary" applies.

Like...modding a car's engine, you *may* get 500 HP of of your stock 200 HP engine...

So using RAMs that can get OCd to 5000,

 

on one CPU they can get XMP to 5000 no problem, but on another (same model) CPU the OC might be only possible at 4800Mhz before instability?

 

I see.

[-rascal-]

16 minutes ago, podkall said:

So using RAMs that can get OCd to 5000,

 

on one CPU they can get XMP to 5000 no problem, but on another (same model) CPU the OC might be only possible at 4800Mhz before instability?

 

I see.

 

Correct.

If you but RAM that is rated for say... DDR5-5000, the default JEDEC (non XMP) is DDR5-4800 (actual frequency = 2400 MHz).

By default, XMP is off.

 

You may run into instability, you might not with DDR5-5000.

And those instabilities, with time, are usually fixed / improved with motherboard BIOS updates.

 

Example....grabbed a random.

ASUS Prime Z690-A.

They pump out a new BIOS update almost every 1 ~ 2 months.

And all of them mentions "Improve system performance and compatibility" and "Improve DRAM compatibility" and "Improve DRAM performance"

Th newest BIOS for this particular board is September 2022.

 

[podkall]

5 minutes ago, -rascal- said:

 

Correct.

If you but RAM that is rated for say... DDR5-5000, the default JEDEC (non XMP) is DDR5-4800 (actual frequency = 2400 MHz).

By default, XMP is off.

 

You may run into instability, you might not with DDR5-5000.

And those instabilities, with time, are usually fixed / improved with motherboard BIOS updates.

 

Example....grabbed a random.

ASUS Prime Z690-A.

They pump out a new BIOS update almost every 1 ~ 2 months.

And all of them mentions "Improve system performance and compatibility" and "Improve DRAM compatibility" and "Improve DRAM performance"

Th newest BIOS for this particular board is September 2022.

 

hmm, great

 

however, aren't DRAM and RAM 2 different things?

[-rascal-]

30 minutes ago, podkall said:

hmm, great

 

however, aren't DRAM and RAM 2 different things?

 

They can be used interchangeably.

DRAM = Dynamic RAM (Random Access Memory).

When you look at specs in a PC /  Phone / Laptop, when they say RAM, its actually DRAM.

 

At least for a PC, I would keep these two identified.

DRAM / RAM = System Memory

VRAM = Video RAM on a Graphics Card

[podkall]

2 minutes ago, -rascal- said:

 

They can be used interchangeably.

DRAM = Dynamic RAM (Random Access Memory).

When you look at specs in a PC /  Phone / Laptop, when they say RAM, its actually DRAM.

 

At least for a PC, I would keep these two identified.

DRAM / RAM = System Memory

VRAM = Video RAM on a Graphics Card

Oh yes, I barely hear the term DRAM, almost nobody uses it so you can see, why it can be confused with VRAM..