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Old November 14, 2011, 08:36 PM
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Location: South Africa
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Default Memory overclock question.

Good day

I have the Patriot Viper Xtreme Series DDR3 8GB 2000MHz Enhanced Latency Kit (PX538G2000​ELK) memory installed on my Asus Maximus IV Gene-Z motherboard.

When I load overclocking profiles I can only choose the following clock speeds for this RAM:
1600, 1866, 2133 all at the default 1.65v.

Currently I set it to 1866MHz which is not the 2000MHz potential.

Can I choose 2133MHz which will overclock it a bit with the same voltage?
Whould I need to change the RAM timings?
I have sufficient cooling in my case so I'm not worried about the RAM overheating.

Please let me know as I cannot find any answer on the Internet.

Kind Regards
Stefan Smit.
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Old November 14, 2011, 08:48 PM
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Join Date: Jul 2009
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If I may...P67/Z68 can be pretty picky about memory
-I recommend setting speed (RAM multi), RAM voltage, and RAM timings (at least the 'big 5' like 9-11-9-27-2T in my case) manually rather than by profile or by auto
-the stock timings may or may not run at 2133. Sometimes you have to loosen them somewhat (higher numbers) to get stability
-I don't know offhand what the stock voltage on your Patriot memory is but it may run 2133 at stock voltage or may require a slight bump
-also, there's a subsystem whose voltage is known as vtt or vccio. Stock level is 1.05v but many users report increasing stability with system overclocks by raising this value. Typical is 1.10v to 1.15v, generally it is accepted that up to 1.20v is safe for day to day usage. Memory runs on this subsystem. I know in my case, I have to raise it to 1.15v or close just to run my stock 1866 value. I recommend either going up from 1.05 in .02v increments or jumping straight to 1.10v and go from there

All that said, memory speed makes very very very little difference on this particular chipset. At 4.8 on my 2500K, I got 10 points difference in 3DMark 11 between 1333 and 1866 RAM speeds (P6631 vs P6641). Unless you are chasing benchmark scores, I highly doubt you would ever know the difference between 1866 and 2133 - though, of course, it's nice to have your parts run at their rated speed.
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Old November 14, 2011, 09:05 PM
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Join Date: Nov 2011
Location: South Africa
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Quote:
Originally Posted by keto View Post
If I may...P67/Z68 can be pretty picky about memory
-I recommend setting speed (RAM multi), RAM voltage, and RAM timings (at least the 'big 5' like 9-11-9-27-2T in my case) manually rather than by profile or by auto
-the stock timings may or may not run at 2133. Sometimes you have to loosen them somewhat (higher numbers) to get stability
-I don't know offhand what the stock voltage on your Patriot memory is but it may run 2133 at stock voltage or may require a slight bump
-also, there's a subsystem whose voltage is known as vtt or vccio. Stock level is 1.05v but many users report increasing stability with system overclocks by raising this value. Typical is 1.10v to 1.15v, generally it is accepted that up to 1.20v is safe for day to day usage. Memory runs on this subsystem. I know in my case, I have to raise it to 1.15v or close just to run my stock 1866 value. I recommend either going up from 1.05 in .02v increments or jumping straight to 1.10v and go from there

All that said, memory speed makes very very very little difference on this particular chipset. At 4.8 on my 2500K, I got 10 points difference in 3DMark 11 between 1333 and 1866 RAM speeds (P6631 vs P6641). Unless you are chasing benchmark scores, I highly doubt you would ever know the difference between 1866 and 2133 - though, of course, it's nice to have your parts run at their rated speed.

Thanks for your reply.
Voltage: 1.65V
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