One of the most important kits in this review is the DDR3-1600 kit for which G.Skill has supplied one of their RipjawsX range.  This kit is of importance due to the close price differential to the DDR3-1333 kit ($5 difference), but also as generations of processors go forward we get an ever increasing suggested memory speed of those processors.  Take the most recent AMD Trinity processor release for desktops – all but the low end processor supports 1866 MHz memory as the standard out of the box.  Now we can be assured that almost all of the processors will do 2133 MHz, but as manufacturers raise that ‘minimum’ compliance barrier in their testing on their IMCs, the ‘standard’ memory kit has to be faster and come down in price also.

Visual Inspection

The RipjawsX kit we have uses a large heatsink design, with the top of the heatsink protruding 9.5mm above the module itself.  As mentioned with the Ares DDR3-1333 kit, there are multiple reasons for why heatsinks are used, and pretty low on that list is for cooling.  More likely these are placed initially for protecting which ICs are used in the kit from the competition (using a screwdriver and a heatgun to remove them usually breaks an IC on board), then also for aesthetics. 

The heatsink for RipjawsX uses a series of straight lines as part of the look, which may or may not be beneficial when putting them into a system with a large air cooler.  Here I put one module into a miniITX board, the Gigabyte H77N-WiFi, with a stupidly large and heavy air cooler, the TRUE Copper:

As we can see, the cooler would be great with the Ares kit, but not so much with the RipjawsX.  The kit will still work in the memory slot like this, though for piece of mind I would prefer it to be vertical.  As we will see with the TridentX (the 2400 MHz kit), sometimes having a removable top end heatsink helps.

JEDEC + XMP Settings

G.Skill
Kit Speed 1333 1600 1866 2133 2400
Subtimings 9-9-9-24 2T 9-9-9-24 2T 9-10-9-28 2T 9-11-10-28 2T 10-12-12-31 2T
Price $75 $80 $95 $130 $145
XMP No Yes Yes Yes Yes
Size 4 x 4 GB 4 x 4 GB 4 x 4 GB 4 x 4 GB 4 x 4 GB

MHz 1333 1600 1867 2134 2401
Voltage 1.500 1.500 1.500 1.650 1.650
tCL 9 9 9 9 10
tRCD 9 9 10 11 12
tRP 9 9 9 10 12
tRAS 24 24 28 28 31
tRC 33 33 37 38 43
tWR 10 12 14 16 16
tRRD 4 5 5 6 7/6
tRFC 107 128 150 171 313
tWTR 5 6 8/7 9/8 10/9
tRTP 5 6 8/7 9/8 10/9
tFAW 20 24 24 25 26
tCWL - 7 7 7 7
CR - 2 2 2 2

 

F3-1333C9Q-16GAO: 4 x 4 GB G.Skill Ares Kit F3-14900CL9Q-16GBSR: 4 x 4 GB G.Skill Sniper Kit
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  • Mitch101 - Thursday, October 18, 2012 - link

    Love this article first time I ever commented on one. I believe you see little improvement past 1600/1866 because the Intel chips on die cache do a good job of keeping the CPU fed. Meaning the bottleneck on an Intel chip is the CPU itself not the memory or cache.

    Can you do this with an AMD chip also as I believe we would see a bigger improvement with their chips because the on die cache cant keep up with the chip and faster external memory would give bigger performance jumps for AMD chips. Well maybe 2 generations ago AMD but lets see your pockets are deeper than mine.

    Hope I said that right I'm a little droopy eyed from lack of caffeine.
    Reply
  • Jjoshua2 - Thursday, October 18, 2012 - link

    Just bought RipjawsZ from Newegg for $90 after coupon! I feel vindicated in my choice now :) Reply
  • ludikraut - Thursday, October 18, 2012 - link

    I thought the performance difference would be less than it was. Has me rethinking whether I need to update my old OCZ DDR3-1333 chips. I haven't yet, as I'm probably giving away 5-10% performance in my OC alone. I targeted efficiency, not absolute speed - at 4GHz my i7-920 D0 consumes 80W less @ idle than the default settings of my mobo - go figure.

    l8r)
    Reply
  • Beenthere - Thursday, October 18, 2012 - link

    For typical desktop use with RAM frequencies of 1333 MHz. and higher there is no tangible gains in SYSTEM performance to justify paying a premium for higher RAM frequency, increased capacity above 4 GB. or lower latencies - with APUs being the minor exception.

    In real apps, not synthetic benches, there is simply nothing of significance to be gained in system performance above 1333 MHz. as DDR3 running at 1333 MHz. is not a system bottleneck. Synthetic benches exaggerate any real gains so they are quite misleading and should be ignored.
    Reply
  • tynopik - Thursday, October 18, 2012 - link

    WinRAR is a 'real' app Reply
  • silverblue - Thursday, October 18, 2012 - link

    It's okay, he said the same thing on Xbit Labs. Reply
  • VoraciousGorak - Thursday, October 18, 2012 - link

    "For typical desktop use with RAM frequencies of 1333 MHz. and higher there is no tangible gains in SYSTEM performance to justify paying a premium for higher RAM frequency, increased capacity above 4 GB. or lower latencies - with APUs being the minor exception."

    No tangible gains above four gi-... what industries have you worked in? Because my old AdWords PPC company's software benefited from over 4GB, and that's the lightest workload I've had on a computer in a while. For home use, I just bumped my system to 16GB because I kept capping my 8GB, and I do zero video/photo work. If you just do word processing, I'll trade you a nice netbook with a VGA out for whatever you're using now.

    DDR3-1333 to 1600 is almost the same price on Newegg, and 1866 isn't much more. Think about it in percentage cost of your computer. Using current Newegg prices for 2x4GB CL9 DDR3, a $1000 computer with 8GB DDR3-1333 will cost $1002 with DDR3-1600, $1011 with DDR3-1866, and $1025 with DDR3-2133. Not exactly a crushing difference.
    Reply
  • Olaf van der Spek - Thursday, October 18, 2012 - link

    Why isn't XMP enabled by default? The BIOS should know what the CPU supports, shouldn't it? Reply
  • Gigaplex - Thursday, October 18, 2012 - link

    What this article glosses over is that G.Skill memory often recommends manually increasing the voltages when enabling XMP profiles. I have the F3-1866C10D-16GAB kit and G.Skill recommends pushing the memory controller voltage out of spec for Ivy Bridge in order to enable XMP. As a result I just run them at 1333 (they don't have 1600 timings in the SPD table and I can't be bothered experimenting to find a stable setting). Reply
  • IanCutress - Friday, October 19, 2012 - link

    I did not have to adjust the voltage once on any of these kits. If anything, what you are experiencing is more related to the motherboard manufacturer. Some manufacturers have preferred memory vendors, of which G.Skill may not be one. In that case you either have to use work arounds to make kits work, or wait for a motherboard BIOS update. If you have read any of my X79 or Z77 reviews, you will see that some boards do not like my 2400 C9 kit that I use for testing at XMP without a little voltage boost. But on the ASUS P8Z77-V Premium, all these kits worked fine at XMP, without issue.

    Ian
    Reply

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