Question safe Memory DDR5 voltage?

[quadrax]

Hello,

As mentioned in name of thread, i would like to ask what you consider as a safe voltage for memory / imc / and VDD+ /Q

Actually i overclocked my G.Skill 6000MHz to 6800MHz, with these settings.

VDD : 1.490
VDDQ : 1.490
SA : 1.1750
IMC : 1.345

Should i worry about any of these settings so far? I tested it in memtest for 3 passes (i will test over night again), but it was without any error.

Thanks for advice.

 

[Lutfij]

We don't exactly memorize people's specs for their builds. With that being said, can you elaborate which processor/motherboard/platform you're on for context?

 

[quadrax]

Sorry i forget to say.

MB: ASUS Z790-P
RAM : 2x 32GB G.Skill (30-40-40-76) 6000 MHz
PSU : 1000w Be Quiet Pure power
CPU : Intel Core i7 13700KF
GPU: Gainward RTX 4070 Ti
CPU Cooler : Arctic Liquid Freezer 360 AIO
SSD : 2x 2TB Samsung 990 Pro

 

[hotaru.hino]

As long as it's within spec, it's "safe" voltage. A cursory glance on the internet tells me for DDR5 SDRAM, the upper range is 1.5V. This says the max voltage for the System Agent and Integrated Memory Controller is 1.45V.

 

[quadrax]

As long as it's within spec, it's "safe" voltage. A cursory glance on the internet tells me for DDR5 SDRAM, the upper range is 1.5V. This says the max voltage for the System Agent and Integrated Memory Controller is 1.45V.

System Agent is not problem. Problem (maybe?) is VDD and VDDQ, which is really high but without it i cannot run on 6800. Maybe i need to sacrifice the speed for lower voltage, but i dont know if its needed and important.

 

[hotaru.hino]

System Agent is not problem. Problem (maybe?) is VDD and VDDQ, which is really high but without it i cannot run on 6800. Maybe i need to sacrifice the speed for lower voltage, but i dont know if its needed and important.

Given that even the i9-13900K doesn't seem to improve much with faster memory and that you have to tune the latency as well to make it worthwhile, I don't think it's worth overclocking the RAM to begin with unless you're after benchmark scores.

 

[Misgar]

Since the RAM in your list is only rated at 6000MT/s, perhaps 6800MT/s is a shade too fast? Do your apps really benefit (as opposed to just benchmarks)?

Extra voltage above the normal XMP boost can hasten electromigration in the RAM and IMC. It depends on how long you intend to keep your system. One year, three years?

If you really need 6800MT/s, try relaxing the CL (CAS) timing by one clock cycle, e.g. increase its value from CL30 to CL31, then drop the voltage back to the normal XMP setting (around 1.30V?).

You might find lower memory clock rates and faster latency are just as effective as bumping the speed up to 6800MT/s.

I'm running the 2 x 32GB DIMMs on my 7950X at 4800MT/s, because Adobe Premiere Pro does not benefit much on AMD systems from faster RAM. When I built the rig last year, 64GB of DDR5-6000 was expensive.

https://www.tomshardware.com/how-to/overclock-ddr5-ram

 

[geofelt]

^^ hotaru.

 

[quadrax]

Thanks to all for feedback. I think i have the answer that i need,