First test is to run these G.Skill F4-3000C15Q-GRRmodules at their Xtreme Memory Profile (XMP) of 3000C15-15-35 with a Command Rate of 2T. To provide some other data we also included the following speeds in the charts:

• 2133C15-15-15-35 2T Command Rate
• 2400C15-15-15-35 2T Command Rate
• 2666C15-15-15-35 2T Command Rate
• 2800C16-18-18-35 2T Command Rate (Corsair Vengeance LPX)
• 3000C15-15-15-35 2T Command Rate (G.Skill Ripjaws 4 3000C15)

It will be interesting to see how the similar priced G.Skill kit will perform versus the slower and looser timed Vengeance LPX 2800C16 kit from Corsair; the results differ slightly from those of the Corsair Vengeance LPX article, this because the CPU clock speed is now set at stock and the uncore raised from 3000 to 3500MHz.

First up SuperPI 32M, a single threaded benchmark that loves raw bandwidth: over 10 seconds are gained from the stock Intel rated 2133 frequency versus the XMP settings of the G.Skill F4-3000Q 16GRR kit. The Corsair kit seems to be in for an as whooping, logic as it features 200Mhz less in memory speed and has looser overall timings, yet it retails at the same price level as our G.Skill kit, thus the choice is pretty rapidly made between these two kits....

The AIDA64 Bandwidth and latency tests tell the tale. Thanks to the upped Uncore the G.Skill F4-3000 kit soars away from the competition. Breaching over 70K in the Copy test and outperforming with over 3K in the Read test; the AIDA64 latency test is also in favor of the faster G.Skill F4-3000 kit.

The Maxon Cinebench R15 64bit benchmark also scales mildly with extra memory speed, though benefits more from the Uncore than running your memory over 2666MHz. Interestingly we see a solid increase from 2133 to 2400MHz, though once above the scaling is less impressive.

The X264HD encoding benchmark shows that faster memory means more FPS can be rendered as the entire subsystem benefits from extra bandwidth. Intel's in house developed benchmarking tool eXtreme Tuning Utility also scales with extra memory performance.