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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  • 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
  • frozentundra123456 - Thursday, October 18, 2012 - link

    While interesting from a theoretical standpoint. I would have been more interested in a comparison in laptops using HD4000 vs A10 to see if one is more dependent on fast memory than others. To be blunt, I dont really care much about the IGP on a 3770K. It would have been a more interesting comparison in laptops where the igp might actually be used for gaming. I guess maybe it would have been more difficult to do with changing memory around so much in a laptop though.

    The other thing is I would have liked to see the difference in games at playable frame rates. Does it really matter if you get 5.5 or 5.9 fps? It is a slideshow anyway. My interest is if using higher speed memory could have moved a game from unplayable to playable at a particular setting or allowed moving up to higher settings in a game that was playable.
    Reply
  • mmonnin03 - Thursday, October 18, 2012 - link

    RAM by definition is Random Access which means no matter where the data is on the module the access time is the same. It doesn't matter if two bytes are on the same row or on a different bank or on a different chip on the module, the access time is the same. There is no sequential or random difference with RAM. The only difference between the different rated sticks are short/long reads, not random or sequential and any reference to random/sequential reads should be removed. Reply
  • Olaf van der Spek - Thursday, October 18, 2012 - link

    You're joking right? :p Reply
  • mmonnin03 - Thursday, October 18, 2012 - link

    Well if the next commenter below says their memory knowledge went up by 10x they probably believe RAM reads are different depending on whether they are random or sequential. Reply

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