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Super PI 32M 4ghz efficiency challenge - Page 15

post #141 of 2130
Quote:
Originally Posted by robbo2 View Post

I ran it on DICE and only hit around 3300 so it's not the strongest NB I've seen. I was surprised to see it hit 2960 on air to be honest.
Are you going to have a go at this man?

I believe 2900-3000 is about the max speed you can expect from a Deneb but you know there are exceptions. My 555 BE hits right about where you topped out with really good cooling and since it's basically a Deneb -2 active cores, more or less the same thing.

The Thuban based chips are the only ones you can realistically expect to go above 3000MHz with any given example. It's obvious that my NB speeds were the deal-maker for me and I was suprised when the chip ponied up and delivered with H2O used for cooling. The exact MB/RAM combo used is of course a factor too but sadly that MB I was using kicked the bucket or I'd have tried it yet again here.
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post #142 of 2130
Thread Starter 
Yeah, Thuban is still the best AMD chip for SPI. Better IMC over Deneb, More L2 cache and a more refined core.
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post #143 of 2130

Im in... tightening things down a bit..still cas9 devil.gif

 

 

post #144 of 2130
Nice start, crank that memory frequency and watch that time drop! biggrin.gif
Edited by jjjc_93 - 9/22/12 at 10:24pm
post #145 of 2130
Quote:
Originally Posted by jjjc_93 View Post

Nice start, crank that memory frequency and watch that time drop! biggrin.gif

 Yup.. just tuning with this memory set.. will need to swap them out to go lower timings. These sticks will hang around up to ~2300mhz. Im not really one to look for speed improvements after cas10 though. Pretty sure I can get down to 8m5s or so just with a few more adjustments..

 

 

 @ bass and some of the other Bloomfield users... -> You absolutely can get higher than +4ghz NB.. its +4ghz QPI that is a ***** !! 


Edited by CL3P20 - 9/23/12 at 8:13am
post #146 of 2130
Quote:
Originally Posted by CL3P20 View Post

@ bass and some of the other Bloomfield users... -> You absolutely can get higher than +4ghz NB.. its +4ghz QPI that is a ***** !! 

4GHz Uncore (IMC) just takes a lot of voltage.

4GHz QPI only matters for 3D and can be circumvented with slow mode (which has no affect on 2D performance). Beyond that, it's just luck of the draw on your X58 chip (IOH).
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post #147 of 2130
Well here's my time. Its not the fastest SB-E. 08m 46.001s



Its the best I can do with 32GB of ram installed.
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post #148 of 2130
3770k@4.8 with 2400 10-12-12-31 gskill got me 7 minutes 3.731 seconds
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post #149 of 2130
Quote:
Originally Posted by y2kcamaross View Post

3770k@4.8 with 2400 10-12-12-31 gskill got me 7 minutes 3.731 seconds

Not bad, although for this challenge there is a 4Ghz cpu frequency limit. The trick is to tweak the memory clocks/timings while keeping in the 4ghz cap, the low clock challenges can teach much about memory overclocking.
    
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post #150 of 2130
Quote:
Originally Posted by FtW 420 View Post

Not bad, although for this challenge there is a 4Ghz cpu frequency limit. The trick is to tweak the memory clocks/timings while keeping in the 4ghz cap, the low clock challenges can teach much about memory overclocking.

Ahhh....if I'd only read the thread title more carefully, though I did find it odd that all the Cpuz screens were at 4ghz tongue.gif
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