Overclock / Tweaking Memory

[Denna]

Can anyone recommend settings to overclock / tweak memory ?

Current configuration:

• Maximus VI Gene (BIOS 1603)
  
• 4790K overclocked to 5 GHz
  
• BCLK=102
  
• Corsair 2 x 4 GB CMT8GX3M2B2133C9 at 1.65v with 9-11-10-27-1 timings running at 2176 MHz
  

[Nate152]

Hello Denna

You could try 10-12-12-30-2 timings and see if it can do 2400MHz, I'm not sure you'd gain much by loosening the timings though.

If it can do 2400MHz see how far you can go. Past 2400MHz you might need to increase the cpu system agent voltage a little.

[Denna]

Nate152,

A DRAM Frequency of 2133 MHz is possible with:

• CPU Strap = 125
  
• BCLK = 100
  
• DRAM Frequency Ratio = Auto
  
• DRAM Voltage = 1.65
  

A DRAM Frequency of 2175 MHz is possible with:

• CPU Strap = 125
  
• BCLK = 102
  
• DRAM Frequency Ratio = Auto
  
• DRAM Voltage = 1.65
  

A DRAM Frequency of 2244 MHz is possible with:

• CPU Strap = 125
  
• BCLK = 102
  
• DRAM Frequency Ratio = 100:100
  
• DRAM Voltage = 1.65
  

What settings can I try to determine if 2240 MHz is the maximum DRAM Frequency ?

[Nate152]

Is this with 9-11-10-27 timings?

Try the cpu system agent voltage @ 1.20v and see if it lets you go higher with the frequency, if it doesn't then you'll have to start loosening the timings.

At the top of the timings page set maximus tweak to mode 2 this can help with overclocking ram.

In the DIGI+ try ram current capability to 130% - 140% or as high as it will let you go.

[Denna]

Nate152,

The System Agent was ~.84v and I added .35v to it, but a DRAM Frequency of 2448 MHz wouldn't post.

The DRAM Current Capability was already at 130 and the Maximus Tweak was set to Mode 2.

As much as I've read about the overclocking potential of this memory, I'm not impressed with a 5% frequency improvement.

I think if the timings were loosenz, the speed would go up, but so would the latency. That would probably create a zero sum gain.

[Nate152]

That's a good question, the fastest ram kit with the lowest timings will always be best. From what I've read higher frequency wins but not by much.

In real world conditions you won't notice the difference. I saw you have your cpu at 5.0GHz, now that's very impressive and a nice performance boost. You'll gain a little more performance overclocking your gpu vs. your ram.

The only place you'll really notice overclocking your ram is in benchmark scores, you'll be lucky if you gain 1-2 FPS in your games overclocking your ram.

[Denna]

Nate152,

I did manage to lower the DRAM Command Rate to 1 and the MemTweakIt Efficency Score went up a little bit.

I read somewhere on an ROG thread that changing DRAM READ to READ Timing to 5 might make an improvement. Unless it's called something else, the Maximus VI Gene (BIOS 1603) doesn't have that setting.

[NemesisChild]

What are you hoping to gain by overclocking your memory?
Like Nate stated, a FPS increase in games will be minimal at best.
Read/write speeds will be a bit better, but even benchmark improvements will be minor.

[Denna]

NemesisChild,

The greatest benefit would come from working with complex and large Excel spreadsheets where even a single variable can change hundreds of thousands of interdependent cells.

Previously, I'd disable Automatic Recalculation when multiple variables had to be changed. It's very time consuming to wait for control of the worksheet when testing a formula.

[Nate152]

I think what you got is pretty good, were you able to squeeze anymore out of it?