Intel 9900k Max Ram Speed

[CausticPro]

The Intel website says the max supported ram speed for the I9 9900K is DDR4-2666. So i figured that getting anything above that speed would be pointless. Because the CPU would not be able to take advantage of the extra speed. But last night i watched this video from Linus where he used the I9 9900KS in a build with DDR4-3600 ram. So i'm guessing that there is something that i don't know about to take advantage of faster ram speeds then your CPU can support? Maybe overclocking your CPU would allow it to use faster speeds? If so is there a way to get an I9 9900K to use DDR4-3600 without wasting speeds? Is there a point to get DDR4-3600 for an I9?

 

Video: https://youtu.be/oa9VQuPsivU?t=298

[FraktalU]

There is this german guy who did all kind of benchmarks and tested all kinds of RAM Speeds with Intel and AMD

https://www.youtube.com/watch?v=m5Urz0J1r5A - but its german only

 

As for Intel Speed scalling I snipped the results picture.

 

I'm runing a Corsair Vengance RGB Pro kit with 3466 MHz at my 9900K

 

 

[Falkentyne]

Every 9900k will work with 3600 mhz XMP memory, but may require a VCCIO and VCCSA voltage increase.  The DDR 2666 mhz spec is for VCCIO=0.95v and VCCSA=1.05v.  Anything higher is basically considered an overclock/overvolt and voids the warranty unless you buy their replacement plan (never mind that Intel themselves made the XMP spec).

 

Some people have already gotten 4800-5000 mhz memory working on the 9900k.  Usually this requires going subzero to do and lots of voltage.  Buying a >4533 mhz binned RAM kit is usually not going to work at stock XMP on any regular system--those sticks are made for people going for world records.

[CausticPro]

3 minutes ago, FraktalU said:

There is this german guy who did all kind of benchmarks and tested all kinds of RAM Speeds with Intel and AMD

https://www.youtube.com/watch?v=m5Urz0J1r5A - but its german only

 

As for Intel Speed scalling I snipped the results picture.

 

I'm runing a Corsair Vengance RGB Pro kit with 3466 MHz at my 9900K

 

 

Thanks for the reply! I'm not 100% sure what this means though lol.

[CausticPro]

4 minutes ago, Falkentyne said:

Every 9900k will work with 3600 mhz XMP memory, but may require a VCCIO and VCCSA voltage increase.  The DDR 2666 mhz spec is for VCCIO=0.95v and VCCSA=1.05v.  Anything higher is basically considered an overclock/overvolt and voids the warranty unless you buy their replacement plan (never mind that Intel themselves made the XMP spec).

 

Some people have already gotten 4800-5000 mhz memory working on the 9900k.  Usually this requires going subzero to do and lots of voltage.  Buying a >4533 mhz binned RAM kit is usually not going to work at stock XMP on any regular system--those sticks are made for people going for world records.

Thank you for the info! Very helpful. Is it hard to do a VCCIO and VCCSA voltage increase?

[Jurrunio]

Past 2666 = overclocking the memory. If you dont rule out overclocking CPUs as pointless, then overclocking the memory shouldn't be pointless either.

 

Different tasks are affected by memory differently, so to what point should you stop going for higher speed memory for performance is debatable

 

 

but the price of a 9900k is so high and that of looser timings 3600 and 3733MHz memory kits are rather low (plenty of 2x8GB kit around $100), you should at least get a 3600MHz kit if you're already shelling out so much for the rest of it.

 

[CausticPro]

4 minutes ago, Jurrunio said:

Past 2666 = overclocking the memory. If you dont rule out overclocking CPUs as pointless, then overclocking the memory shouldn't be pointless either.

 

Different tasks are affected by memory differently, so to what point should you stop going for higher speed memory for performance is debatable

 

 

but the price of a 9900k is so high and that of looser timings 3600 and 3733MHz memory kits are rather low (plenty of 2x8GB kit around $100), you should at least get a 3600MHz kit if you're already shelling out so much for the rest of it.

 

 

[FraktalU]

in my post before was the snipped of the maxx mem memory test

this picture is the snipped from his shadow of the tomb raider test

the real ram speed is a comination of clock an timings.

as you can see the scaling of memory speeds gets worse upon a certain point on intel as the timings are rising.

[Enderman]

2666 is just the stock speed, when you enable XMP in your motherboard UEFI you can use 4000MHz+ ram.