Testing Method & Test Setup
It's the first time we are dealing with Micron's D9PBC chips
so we armed ourselves with an Ivy Bridge testing platform that
should allow our memory to show every last bit of its overclocking
To make sure that our figures represent the sort of stability safe to use
ever day, we are going to run each setting until we get a 150% pass of eight
750MB instances of HCI Memtest that is considered one of the toughest memory
||ASUS Maximus V Gene (BIOS 1204)
||Intel Core i7-3770K @ 4.0 GHz
||ASUS GTX 580
||GeIL Evo Veloce GEV316GB1866C10DC
||Intel SSD 330 120 GB
||Seasonic Platinum 1000 Watts
||Windows 7, 64 bit SP1
But immediately, we encountered a couple of issues.
First, we found out that GeIL’s SPD sets the subtimings too tight, making
high frequencies unreachable without manual adjustments. On the
screenshot below we demonstrate which values we had to loosen when testing the
overclocking capabilities of our kit.
thing, we’ve noticed is that unlike all recent Micron 2Gb D9 chips we tested previously, our
fells flat on their face using identical primary timings. Raising tRCD by one value
above tCL and tRP has noticeably improved the situation.
As you can see from the results chart, past 1.5
Volt scaling comes to an end. More juice only
increases the power consumption. Usually Micron ICs are able to digest higher voltages.
be interesting to test a memory kit made by Crucial to see if the problem really is
related to the IC itself, the SPD or the PCB. We reckon - with our
past experiences - that limited voltage scaling is caused by an imperfect PCB design.
At the moment this kit looks very bad but in fact it isn't. Check
out the results, the kit can achieve much higher frequency than the specs at
only 1.35v. At 1.5v it is even stable at 1'020 MHz with the rated timings which
is 87 MHz more than the frequency the kit has been specified for.
But in order to obtain the best of the kit you will have to raise timings a bit
to 11-12-11-34 and set the voltage to 1.65v. In this case the kit will fly,
1'200 MHz was almost reached 400 % stable.
If you are scared to use 1.65v on a 1.5v rated memory kit then you can keep 1.5v
and lower the timings to 9-10-9-28. In this scenario we were able to run the Evo
Veloce at 980 MHz.
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