Kingston HyperX Grey at 1.65v...Too high?

RaveyDaveyUK

RaveyDaveyUK

RaveyDaveyUK

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247
Hi,

The default XMP voltage for this ram to run at 1600mhz is 1.65v. Should I be lowering it manually as I see people saying 1.65v is the max for i5/i7?

See my specs below.

I am currently running the cpu on an auto-OC (which I will be changing to manual soon)....still reading up before I jump in.

Does the Kingston Grey operate ok at 1600mhz just buy lowering the DRAM voltage. Is that the only setting to change?

Advice gratefully received?

I've bought the gear...just need to learn how to use it well.. ;)
 
Nearer 1.5V is better for Sandy Bridge and the RAM should work at around that voltage.

I'm not sure if you can just change the voltage manually if using the XMP profile.

If you can then do it.

If you can't then you'll need to enter speed, timings and voltage manually.
 
Excuse second post.... From what I can see other (better?) RAM run at lower voltages at 1600mhz.

Is this something I should consider as a replacement? Instead of the Kingston swap to Gskill or something?
 
RaveyDaveyUK said:
Is that information available to me, Kingston website, etc? Or is it just a adjust and test?

Sorry for what i guess is a basic question to some.
Click to expand...

What information?

If you go into the BIOS see if you can adjust the voltage with XMP enabled. If you can then do it. 1.5V should be OK but if you get any issues try raising it a bit at a time.

If you need to enter everything manually then:
  • Speed 1600MHz
  • CAS (tCL) 9
  • tRCD 9
  • tRP 9
  • tRAS 27
  • Command Rate 2T (you can try 1T but it might not be stable)
  • DRAM voltage 1.5V (or a touch more if needed)
 
Ok...cant believe it was that simple. I was really worried about it! lol...

All seems stable at the moment set as above.

Do certain things cause memory to BSOD. I mean should I run memtest or Prime to see if it holds?
 
RaveyDaveyUK said:
Do certain things cause memory to BSOD. I mean should I run memtest or Prime to see if it holds?
Click to expand...

I would just use your system as normal.

If everything was working properly before then if you do encounter any problems you know it's likely the RAM so just up the DRAM voltage a touch.
 
RaveyDaveyUK said:
Ok will do.

Thanks for the help.

i'm trying to understand how this all works, but guess will just have to jump in soon to see what can be done.
Click to expand...

You're welcome.

You seem to be doing OK.

You've got your RAM running at a better voltage now and you have a decent overclock on your processor.

Looking pretty good :)
 
Most safe is difference between CPU Vcore and CPU I/O less or equal 0.5 V.
It means 2 things:
1) your mobo would try to adjust voltage on its own, setting up 1600 memory as 1333 MHz with lower voltage (if it's not applicable to run 1600 with lower voltage), and
2) if you want to use higher mem clocks, you have to lift up CPU I/O voltage accordingly to keep CPU mem controler safe.

But many people use 1.60-1.65 V mems & SB CPU, and it's hard to say if it will cause any failure in the future, or not. It depends on particular unit, as I presume.

For example, I've got Corsair Dominator memory taken out from previous s775 motherboard. They are (by SPD) 1800 MHz CL 8 1.80 V capable, but motherboard sets them up as 1333 MHz CL 9 1.50 V. I've overclocked them a bit to 1333 MHz CL8 1.50 V, or 1600 MHz CL 9 1.55 V (with raised CPU I/O accordingly). It means safe settings, but as I believe, 0.05 V less in CPU I/O wouldn't destroy my CPU... anyways, if I'm able to set it in my own, I'll do it :)
 
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I,m using the same memory with my 2500k & Asus P8Z68-v Pro.
Used XMP setting , lowered DDR voltage to 1.525 also lowered Command rate to 2.Passes IBT & `10 1/2 hrs of prime no problems.
 
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