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DDR3-2133 RAM Stable at 2000MHz, unstable at 2133

post #1 of 13
Thread Starter 
I use Patriot Viper 3 Series 2133MHz 2x4GB Memory kit. When I set the memory clock in BIOS to 2000 I get a stable OC, but I want them to run at the advertised 2133MHz. When I set memory speed to 2133 my programs/games randomly crash after about 15 minutes. There is a noticeable improvement in load times between 2000 and 2133 so I don't really want to just be happy with the lower speed.
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post #2 of 13
Give the dram more volts, or loosen timings and if that does not work run Memtest86+ to make sure ram is ok, then you know your mobo is not playing nice. In that case update Bios and if that does not work, rma mobo if it's compatible with 2133 speed but refuses to work with it.

Before all this, you need to revert your CPU overclock to stock to isolate it from the equation.
Edited by Gunderman456 - 10/11/12 at 5:33pm
 
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post #3 of 13
Thread Starter 
How many more volts are we talking here? The BIOS claims it's 1.5 default. I bumped it up to 1.52 and it seems to be working better now, but I'll try running Memtest. And the CPU overclock I highly doubt is the problem because I used to have it at 4.5GHz with the RAM at 2000MHz and it was perfectly stable, just slower.
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post #4 of 13
Are you running XMP profile or are you just adjusting the speed according to the packet?
post #5 of 13
For me to run my ram at 2133 i needed to up the vccio to 1.10 and im perfectly stable with 16gigs of 2133.
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post #6 of 13
Thread Starter 
Windows won't boot with XMP on. There's just a setting for the clock speed, and one for DRAM voltage. I currently have the clock speed at DDR3-2154 (They're all slightly higher than what you get in Windows) and DRAM voltage at 1.535, still slightly unstable. It's not like I get system hangs or crashes, just applications randomly closing. What is VCCIO? Does it go by some other name, because I don't see that in my BIOS settings.
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post #7 of 13
Quote:
Originally Posted by Drpillz624 View Post

Windows won't boot with XMP on. There's just a setting for the clock speed, and one for DRAM voltage. I currently have the clock speed at DDR3-2154 (They're all slightly higher than what you get in Windows) and DRAM voltage at 1.535, still slightly unstable. It's not like I get system hangs or crashes, just applications randomly closing. What is VCCIO? Does it go by some other name, because I don't see that in my BIOS settings.

Could you post a screenshot of the cpu-z memory tab at 2000mhz and your 2154mhz. It's possible that you may have to change your timings, maybe even the command rate. Also link to the memory that you have would be great.
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post #8 of 13
Thread Starter 
Regardless of whether BIOS is set to 2018 or 2154, all these in CPU-Z are the same:
FSB:DRAM 1:8
CAS# 11
RAS# to CAS# 11
RAS# Precharge 11
Cycle Time 27

Command Rate 3T

DRAM Frequency shows as 1009MHz when set to 2018, 1077MHz when set to 2133.

In BIOS I have the following voltages:
DRAM Voltage 1.535 (Bumped up from 1.500)
VCCSA Voltage 0.925
PCH Voltage 1.05

Edit: Found the RAM kit I have on Patriot's website: http://www.patriotmemory.com/product/detail.jsp?prodline=5&catid=34&prodgroupid=232&id=1312&type=1
Edited by Drpillz624 - 10/13/12 at 1:03am
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The One Rig
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post #9 of 13
Quote:
Originally Posted by Drpillz624 View Post

Windows won't boot with XMP on. There's just a setting for the clock speed, and one for DRAM voltage. I currently have the clock speed at DDR3-2154 (They're all slightly higher than what you get in Windows) and DRAM voltage at 1.535, still slightly unstable. It's not like I get system hangs or crashes, just applications randomly closing. What is VCCIO? Does it go by some other name, because I don't see that in my BIOS settings.

I looked up your board and it does not have vccio wierd you could try bumping vcca to .95 see if that helps. Really wierd you don't have vccio that helps run ram more stable at higher clocks.
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post #10 of 13
Patriot do not always bin their memory correctly, 1066MHz tRCD 11 might be a bit too optimistic for general Hynix CFR. If you're still getting problems - try more voltage and tRCD 12.
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Overclock.net › Forums › Components › Memory › DDR3-2133 RAM Stable at 2000MHz, unstable at 2133