Memory Performance: 16GB DDR3-1333 to DDR3-2400 on Ivy Bridge IGP with G.Skill
by Ian Cutress on October 18, 2012 12:00 PM EST- Posted in
- Memory
- G.Skill
- Ivy Bridge
- DDR3
USB 3.0 Backup
Our backup testing takes a typical set of user files – specifically just under 8000 files across 4 GB, some large files but mostly small. For USB 3.0 testing, these files are copied from a 4 GB RAMDisk onto an OCZ Vertex3 which is connected via a SATA 6 Gbps to USB 3.0 device. We use all the USB 3.0 protocols available - the UASP protocol that the ASMedia controller on our test bed affords as well as the chipset driven Intel USB 3.0 under ASUS' Turbo mode. The copy test is conducted using DiskBench, a copying tool with accurate copy timing.
Across the result range, no matter which protocol is used, our copy testing shows up to a 7% decrease in copy times over the USB 3.0 protocol moving from DDR3-1333 to DDR3-2133. In some cases, such as using Intel Turbo mode, the timing levels out around DDR3-1866, but in the case of UASP, the DDR3-2133 C9 kit provides the best result. Interesting to note that in the case of UASP, having a smaller CL value is more important than having a larger speed value.
Thunderbolt Backup
Similar to our USB 3.0 Backup test, Thunderbolt testing carries the same files directly through to our LittleBig Disk which contains two 120 GB Intel SSDs in RAID-0. The copy test is conducted using DiskBench, a copying tool with accurate copy timing.
Thunderbolt tests are never as consistent as USB timing – the results shown are the average of the best three obtained. Typically the best results come after leaving the Thunderbolt device for 30 seconds or longer after the last copy test as the TB device does an amount of post processing after the data has officially been sent. Nevertheless, a gradual decrease in copy times is exhibited from DDR3-1333 to DDR3-2400.
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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.
Jjoshua2 - Thursday, October 18, 2012 - link
Just bought RipjawsZ from Newegg for $90 after coupon! I feel vindicated in my choice now :)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)
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.
tynopik - Thursday, October 18, 2012 - link
WinRAR is a 'real' appsilverblue - Thursday, October 18, 2012 - link
It's okay, he said the same thing on Xbit Labs.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.
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?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).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