Usually RAM vendors set the timings in the XMP profile a little looser to ensure stability of the kit. Let's see if we can tweak some to get a little extra peformance for free. Take note that we stick to the XMP voltage set and strangely enough it is 1.65Vdimm instead of the announced 1.5Vdimm on the RAM's stickers, even tough GeIL includes a little Readme leaflet. It still surprises me why they opted to choose 1.65Vdimm via XMP and warn you to adjust manually yourself. Let's take a look first at the XMP settings:

First thing is to try to see if Command Rate 1T is stable, then lower tRFC from 321 to 285. The tertiary timings and especially the big bandwith boosters tRRSR and tWWSR are set at 4 which is excellent. No more tweaking for the latter. We ended up with the below settings for the Tweaked results.

Thing we noted is that this Hynix based kits does not allow to go low on the TRFC, once we tried below 250, either the sytem refused to boot, locked up in Windows7 or 3DMark11 would crash. Let's take a result at the results:

Almost a 4 second lead with the tweaked RAM settings over the XMP profile in SuperPI 32M. Seems these sticks still got some room left. The AIDA bandwith results speak for themselves, not massive gains, but 600MB/s in COPY and 700MB/s in READ are pretty solid numbers, especially for the few tweaks applied.

Cinebench scales, though X264HD improvement is hardly noticeable. The latter benchmark loves more speed and correct applied timings. 3DMark11 puts out a better score in the PhysX subtest, yet the total score hardly budges.

The mandatory HCI Memtest screenshot: