Help with RAM OC to 1866MHz

[Tintai]

Hey

So I have a problem with RAM oc to 1866MHz. On 1600MHz, 1.5V works fine but on 1866, 1.5V, 1.55, 1.58, 1.6, 1.63 and 1.65V didn't work. Computer often shows me BSoD with code 109, 1a, 19, d1 and etc.

The question is: why?
Is the problem in CPU?

I overclock CPU but not now. I'm waiting for water cooler so for now I want oc only RAM.

Can anyone tell my what I doing wrong?

Thanks

~Tintai

 

[Aquinus]

If your memory is stock at 1866, you should be able to just switch on XMP and it should start working. You may need to loosen up your memory timings because JEDEC DDR3-1600 might have tighter timings than your memory at 1866.

It should work at 1866Mhz @ 9-10-9-27 @ 1.5v.

What are you timings right now at 1600?

 

[Shou Miko]

hmm is it 2 or 4 sticks? and try with what Aquinus says it sometimes help.

 

[Aquinus]

hmm is it 2 or 4 sticks? and try with what Aquinus says it sometimes help.

I think he might have http://www.corsair.com/vengeance-16gb-quad-channel-ddr3-memory-kit-cmz16gx3m4x1866c9r.html

His board may not support XMP 1.3, so he may need to put it in manually but I doubt it.

 

[Tintai]

What are you timings right now at 1600?

9-9-9-26

4 sticks. 1 = 4GB.
I have this: http://www.corsair.com/vengeance-8gb-dual-channel-ddr3-memory-kit-cmz8gx3m2a1600c9.html

Ok, I try this.

@edit:
I change to 1866Mhz @ 9-10-9-27 on 1.55V, bcs on 1.5V system won't boot.
Now I testing.

Maybe I should oc timing not frq? Ex 1600MHz @ 8-8-8-24?

 

[erocker]

Try 1.65v

Those sticks of RAM aren't very good overclockers to begin with. Using four sticks reduces overclock-ability.

 

[drdeathx]

Loosen timings try 10/10/10/24. those sticks may not be compatable with your board also. look at the vendors QVL list

 

[Hood]

It may be possible to reduce latency by tightening timings and leaving freq. at 1600, but in my experience you get slightly higher throughput and lower latency by getting it stable at 1800 or 1866 with the tightest possible timings and 1.65v. You should run a quick benchmark before & after (such as AIDA64 Cache & Memory benchmark) to see if performance was actually increased. Also memory overclocks work better if the CPU is overclocked.

 

[Tintai]

Yes RAM is compatible but on XMP.
Anyway, 38 minutes and no crash. 9-10-9-26.

 

[drdeathx]

Yes RAM is compatible but on XMP.
Anyway, 38 minutes and no crash. 9-10-9-26.

Congrats. Unfortunately not all ram is stable at rated timings. looks like the slight back off did the trick. Now lower the voltage, it may have just been a timing issue...

 

[Tintai]

Thanks. I tested with AIDA64 and there is no problem. For now it works
When BSoD appear I change timings to 10-10-10-27. But will see.

 

[Aquinus]

9-9-9-26

4 sticks. 1 = 4GB.
I have this: http://www.corsair.com/vengeance-8gb...m2a1600c9.html

Ah okay. You want to OC to 1866 from 1600. The memory isn't rated to 1866. I get it now. Yeah, you might have to work pretty hard to get it to run at 1866Mhz but that really depends on the memory. Some does well some doesn't. Like my G.Skill memory is stock at 9-11-10-28 @ 2133Mhz and I have it running at 10-12-11-30 @ 2400Mhz. You tend to get what you pay for when it comes to memory though. Occasionally you'll get something sexy like those 1.35v low profile Samsung chips. It was pretty amazing to see what those could do.

 

[Tintai]

Everything is fine. No crashes, RAM works stable.