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Max RAM Overvoltage?

post #1 of 9
Thread Starter 
I'm running some o'dis
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231416

G.Skill Sniper 8gb CL9 1.5v 1600
Wondering what the IC's are/what's a standard safe overvoltage for RAM.
I tried googling around and it seems that anything below 1.7v should be a yes?

I'm going to try and pull in the timings since I'm now honing in on my limits with my heatwall approaching and unbootable 3ghz NB freq.
4.1ghz @ 1.408~1.440
2950mhz @ 1.3v
Timings are still 9-9-9-24, gonna see how low I can go! devil.gif
post #2 of 9
1.65V or below is extra safe, and will not give you any troubles. 1.7V Should also be relatively harmless for 24/7, even above that is still fine, but I'd start being careful after 1.7 anyways
 
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post #3 of 9
Quote:
Originally Posted by Alatar View Post

1.65V or below is extra safe, and will not give you any troubles. 1.7V Should also be relatively harmless for 24/7, even above that is still fine, but I'd start being careful after 1.7 anyways

This.
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post #4 of 9
Thread Starter 
Thanks for the information smile.gif
Here we go!
post #5 of 9
Thread Starter 
What should I be aiming for? 7's/8's? & always go for 1T? It reduced my latency by a few seconds.

Preliminary test at 1.696v seems to indicate 7-7-7-24-2T isn't possible @ 1600mhz...

So I'm stress testing 8-8-8-24-1T right now.

440 vs 440
post #6 of 9
The latencies will only show a minor improvement in benches. They won't show anything in real world applications.

Testing on both AMD and Intel desktop PCs has shown that with DDR3 RAM there is little to no tangible performance gains in real applications on desktop PCs once you get above ~1333 MHz.

http://www.overclock.net/t/1206332/help-me-through-my-bottleneck-6-7-6-24-1t-1333mhz/20#post_16432691

AMD Llano/APUs are the exception as both the CPU and GPU can access the higher frequency and that does improve real world performance. Increased frequency is best with the APUs. Latencies don't make any tangible diff.

As the frequency increases one clock cycle becomes less and less in real time. Since the DDR3 RAM isn't a bottleneck there isn't much to be gained. Some folks have OC'ed the FX CPU RAM to 2400 MHz. and seen ZIP for performance gains because the RAM is not limiting performance.

Benches will show a little improvement but that doesn't seem to transfer to real apps. for most folks.

Intel has even announced they will stick with DDR3 until 2014 because it's not a bottleneck.

http://www.fudzilla.com/home/item/26169-intel-sticks-with-ddr3-till-2014
post #7 of 9
Thread Starter 
Quote:
Originally Posted by AMD4ME View Post

The latencies will only show a minor improvement in benches. They won't show anything in real world applications.

Testing on both AMD and Intel desktop PCs has shown that with DDR3 RAM there is little to no tangible performance gains in real applications on desktop PCs once you get above ~1333 MHz.

http://www.overclock.net/t/1206332/help-me-through-my-bottleneck-6-7-6-24-1t-1333mhz/20#post_16432691

AMD Llano/APUs are the exception as both the CPU and GPU can access the higher frequency and that does improve real world performance. Increased frequency is best with the APUs. Latencies don't make any tangible diff.

As the frequency increases one clock cycle becomes less and less in real time. Since the DDR3 RAM isn't a bottleneck there isn't much to be gained. Some folks have OC'ed the FX CPU RAM to 2400 MHz. and seen ZIP for performance gains because the RAM is not limiting performance.

Benches will show a little improvement but that doesn't seem to transfer to real apps. for most folks.

Intel has even announced they will stick with DDR3 until 2014 because it's not a bottleneck.

http://www.fudzilla.com/home/item/26169-intel-sticks-with-ddr3-till-2014
Thanks for the info. I've repped everybody, helpful posts. That article seems to be quite interesting when I skimmed it.

In that case, I'll be reverting back to 9-9-9-24-2T just for stability sake. No point in reinstalling windows/restoring a backup if I don't need to!

Keeping RAM stock (maybe pushed 90mhz to 1690) would be the smart choice it seems since I have to run it close to 1.7v to pull in lower timings. Keeping my 2900cpu/nb oc though! thumb.gif

Side note: Should I push more than 4.1? I have to bump up voltage one notch which puts me up like 4C to 55C or should I use that thermal headroom to pump up my CPU/NB voltage from 1.325/2900mhz higher?
post #8 of 9
The best gains are typically from a faster CPU clock, so that's the way to go and live with whatever RAM and NB frequencies that are necessary for stability.
post #9 of 9
Quote:
Originally Posted by AMD4ME View Post

The best gains are typically from a faster CPU clock, so that's the way to go and live with whatever RAM and NB frequencies that are necessary for stability.

this, overclock your CPU and you will see noticeable gains, leave the RAM as is what it is rated at as you wont see much difference but OC your RAM if you want to see how far you can push it whilst its stable thumb.gif
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