Avatar of Archer


Getting the most out of IVY

May 29, 2012 in CPU, Intel, Overclocking, PC

All previous overclocked benchmarks were run with the multiplier set at 44, voltage set at 1.240v, Turbo TDP set at 77 and the max Amp load at 112 (Default).

Using settings similar to the ones in the BIOS section, we will see what we can do about temperatures. There are some catches here, and though they are not bad things, they will affect CPU speed under heavy loads and at times the CPU speed will drop below your set clock when the loads lighten or when the loads get too heavy. Seeing temps staying 4-10 degrees cooler in IBT may be worth it if everything else plays nice though. So where do we go from here? What are the scores and increases?

PC Wizard scores 70638 or 5% improvement
PassMark 32 bit 3584.1 or 3% improvement
PassMark 64 bit 4208.8 or 2% improvement
NovaBench 1504 or 2% Improvement
PCMark 7 5809 or 2% increase
PCMark Vantage 21362 or 2% increase
PCMark Vantage 64 22745 or 3% increase

These numbers average out to about a 2.7% increase in total system performance. If the drives were able to run at 100% on this board it would make a bigger difference. How much could you expect to lose in drive performance? Well it is give and take. Below are shots of the drive tests which are not all bad.

On the left is standard OC and on the right is an OC using power saving and dynamic vCore:





When we put all of this together what do we get? Moving from a locked voltage and no power savings we see increased system wide performance but the caveat (first of two) is a loss in drive performance. It is not noticeable however unless all you do in benchmark. Access times stay the same, burst rates may increase slightly, Minimum transfer rates do take a hit as does average transfer rate. If one is doing data intensive tasks it could be a slight hindrance but if you game and do general tasks you may benefit from the slight boost and lower temps. And speaking of the Core temps.

Average temp across cores Dynamic 93.0º
Average temp across cores Set voltage 95.75º
So we see a 2.75 degree advantage but in reality it is much more than that:

The first four shots are using power savings and dynamic vcore (the tests that were done with 2.7% better performance). The clock speed changes with increased load or lack of load. This in turn saves power and keeps temps down. In some cases where loads are very heavy there is a decrease in performance though it is not common with realistic loading.

The following two shots are the final IBT maximum results. This is where the temps come into play. The first shot is using dynamic vcore and showing maximum temps of 96, 93, 93 and 90 and the second shot is with a locked vcore and temps of 90,100, 99 and 94. This is only 5º away from Tj. Max which would cause throttling (speed reduction if you prefer) to reduce heat. The caveat (number two) here is a loss of performance under extremely heavy load. In effect we are throttling the CPU before it reaches this point. We have seen that this should in no way happen under normal heavyload as is evidenced by the gains made over the standard OC.

Mileage may vary with the Ivy Bridge CPU where temps and performance are concerned and there are other options like water cooling, but if you do not want to make that investment or don’t want the bother finessing more out of this CPU then settling for a lower OC may be your only other option which could yield better results if you are under extremely heavy load.

Discuss in forum: http://tekinferno.com/TekInfernoforum/index.php?topic=4781.0


ExactSeek: Relevant Web Search Submit Your Site To The Web's Top 50 Search Engines for Free! Sonic Run: Internet Search Engine