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Not getting advertised speed of 2133mhz

post #1 of 40
Thread Starter 
This is my build http://ca.pcpartpicker.com/user/oo2k15/saved/3OqO
I'm using this ram http://ca.pcpartpicker.com/part/patriot-memory-pv316g213c1k

As you can tell from the ram is 2133mhz but I'm getting 1600mhz 9-9-9-24 instead by default. So i changed the suggested tested timings to 11-11-11-30 in the bios to get that advertised speed of 2133mhz but is unstable and it keep crashing. I try 1866mhz speed instead with tested timings of 10-11-10-30 with 1.5v and it works. Been using for days now no problem at all is stable. The problem is getting that 2133mhz stable timings.

So I was wondering if any one of you know any stable timings without crashing for this ram. Should I increase DRAM voltage? The default is 1.5v the motherboard suggest that I don't go over 1.5v or it will become unstable or even worst fry my ram. Yes my motherboard support 2133mhz. Yes i've already install the latest BIOS.

If you wanna know how my bios look like watch this video. My bios is exactly like that. http://www.youtube.com/watch?v=FXb8yctGQbI

These are my bios setup http://i26.photobucket.com/albums/c137/estset/photo1.jpg http://i26.photobucket.com/albums/c137/estset/photo2.jpg http://i26.photobucket.com/albums/c137/estset/photo1-1.jpg

I did Mem86 test on my ram. Both of the sticks is good no errors. Tried running each module separately I can get 2133mhz when using single channel no problem. But when I use it in dual channel thats when the crashing and problem start. I've tried asking my friends for help but he doesn't know the answer. I have post this question in many site to get help.

Any suggestions on how I can solve this issue? Should I return the ram and get a different pair of kits? Or will I get the same problem. Thx.
post #2 of 40
I've literally just answered this question here: http://www.overclock.net/t/1476565/corsair-vengeance-lp-2133mhz-ram-shenanigans... you're not his brother are you!?

The memory is capable of running at those speeds, its your Processor and/or motherboard which can not handle the speeds
 
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post #3 of 40
Enable XMP and see if that helps. Standard profiles are usually better than customized ones.
Quote:
Originally Posted by pharcycle View Post

I've literally just answered this question here: http://www.overclock.net/t/1476565/corsair-vengeance-lp-2133mhz-ram-shenanigans... you're not his brother are you!?

The memory is capable of running at those speeds, its your Processor and/or motherboard which can not handle the speeds

Exactly. So many people don't realize that the ultra fast RAM will be bottlenecked by the CPU or mobo. Some people assume it's plug-and-play. You'll have to overclock your CPU to take advantage of anything greater than 1600mhz when using any of the available consumer-grade CPUs and most mobo's handle max 1600mhz without OC. I got a lot of hate for saying this in another thread on OCN haha.. I always recommend tighter timings over faster speeds.
post #4 of 40
Thread Starter 
How do you I reckon I solve this problem? Get a new motherboard? Get a new CPU? New Ram? Overclock my CPU? Increase DRAM Voltage?

I just want my damn advertised speed of 2133mhz that I purchased for. =/ I'm stuck with 1866mhz right now. Although 1866mhz to 2133mhz is not that much of a difference anyway so I can live with that.

Btw I check the Gigabyte site and the motherboard does support 2133 mhz. How do you explain the fact that when I use the single module stick running at 2133mhz with tested timings of 11-11-11-30 1.5v it works and stable. But when I use them as dual channel thats when it crashes. So the only problem I can see is there is a motherboard limitation.
post #5 of 40
Quote:
How do you explain the fact that when I use the single module stick running at 2133mhz with tested timings of 11-11-11-30 1.5v it works and stable. But when I use them as dual channel thats when it crashes. So the only problem I can see is there is a motherboard limitation.

If you can run both sticks single @those timings then it's just memory controller limit

there's maybe some voltage that you can adjust, not sure for amd
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post #6 of 40
Thread Starter 
Yeah if I can't get it stable at 2133mhz using 1.5v, then it means I need to raise the voltage. But Idk if my motherboard support voltage higher than 1.5v though. Not sure how much voltage I should increase by.
post #7 of 40
Does your board not support the standard XMP profile? Your board can handle 2133mhz without overclocking and your RAM has an XMP profile which means the only thing you're going to need to overclock or tweak to take full advantage of the 2133mhz is your CPU.

EDIT: Looks like your CPU can handle 2133mhz without overclocking. Basically all you need to do is turn on the XMP profile in your BIOS settings and that's it. No need to tinker with anything else. Try A1/B1 then try A2/B2 if it didn't work. Then try updating your BIOS if neither of those worked.

Then if NOTHING works after you updated BIOS, enabled XMP, and tried both dual-channel slots.. something else is wrong (maybe compatibility, maybe your mobo)
Edited by DonDizzurp - 3/27/14 at 3:20pm
post #8 of 40
Thread Starter 
Yeah i've tried what you said.

Went to the BIOS and Loads Optimized Defaults>Save&Exit>Reboot

Enable XMP profile>Save&Exit>Reboot

Open CPU-Z and i'm getting 2133mhz for sure. Few secs later it crashes.

So this time I did the same thing except for one thing that was to raised the voltage +.05 V from default 1.5v to 1.55v.

Enable XMP profiel>raised the voltage +.05>Save&Exit>Reboot

Open CPU-Z and i'm getting 2133mhz stable timings. It doesn't crash this time. =) Time will tell of course.

The solution was to adjust DRAM Voltage all along.
post #9 of 40
Quote:
Originally Posted by oo2k15 View Post

Yeah if I can't get it stable at 2133mhz using 1.5v, then it means I need to raise the voltage. But Idk if my motherboard support voltage higher than 1.5v though. Not sure how much voltage I should increase by.

Nah, i meant voltage for memory controller etc on the CPU, not for the RAM

If the memory itself runs fine with each stick in seperately @1.5v, then both sticks work and are functional, just the memory controller can't handle them
Quote:
Open CPU-Z and i'm getting 2133mhz stable timings. It doesn't crash this time. =) Time will tell of course.

The solution was to adjust DRAM Voltage all along.

Interesting, i was going to say try 1.6v but didn't think it was issue
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post #10 of 40
If you need to bump the ram voltage to get the advertised speed then you have a bum kit. The ram itself should be wholly capable of running at it's given specs. If you were unstable at the rated specs then I would say you need to do more testing. But since bumping the actually vram stabilized the system we can conclude the kit itself is not up to par.
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