G.Skill RipjawsX DDR3-2133 8GB RAM Review

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It has been a while since we had a look at some RAM, so today we’re happy to bring you a solid set from G.Skill, their Ripjaws-X DDR3-2133 8 GB kit, model # F3-17000CL9D-4GBXL.

Packaging, Specifications and First Impressions

Like all G.Skill kits that include a fan, these come in a nondescript cardboard box. The top displays their design intent (to be used on LGA1155 systems) and the side shows the model number and specifications.

Ripjaws DDR3-2133 Box
Ripjaws DDR3-2133 Box

Ripjaws DDR3-2133 Specifications
Ripjaws DDR3-2133 Specifications
Box Opened
Box Opened

Opening the box, we are met with the first view of the rather sizable fan assembly. Everything is packaged well and will survive its journey to you without issue.

Exploring the fan assembly, it is very well made with a metal frame housing dual 50 mm, 0.8 W fans.

Included Fan Assembly Top
Included Fan Assembly Top

Included Fan Assembly Side
Included Fan Assembly Side

Assembly 5 cm Fans
Dual 0.8 W, 5 cm Fans

Included Fan Assembly Sleeved Cable
Included Fan Assembly Sleeved Cable

The fans are not absolutely silent at full tilt but don’t qualify as loud. Merely audible would be the best descriptor, and this is on an open bench station. Inside a case you’d never hear them.

The wire is sleeved, which is a nice touch. I’d have preferred a 3-pin header to the MOLEX connector though. It’s much easier to use a motherboard header for these things than run an extra MOLEX connector to them.

Pulling the RAM out, we are met with a nice looking set of shiny red sticks.

The Main Event
The Main Event

Different Lighting
Different Lighting
Specification Side
Specification Side

These aren’t the giant heatspreaders of recent memory. That’s ok, because in use (and even under heavy R.S.T. Pro 3 testing) they didn’t get hot. The fan is almost overkill with these guys. It doesn’t hurt at all but if you want a low profile set of RAM and can’t fit the fan, it’s nothing to stress.

All in all a great looking set. Two thumbs up for appearance.

Test Setup and Methodology

Due to a series of events that led to the initial baseline kit being passed on to another of our editors, there are two systems compared in this review. They are both based off the P67 chipset and differences between the two systems when CPU and RAM are set in identical configurations amount to a rounding error at best. The systems, side by side, were both used in our recent review of the ASRock P67 Extreme 6.

Processor i7 2600K i7 2600K
Stock / Overclocked Speeds (GHz) 3.4 / 4.3 3.4 / 4.6
Motherboard Intel DP67BG ASRock P67 Extreme 6
RAM Patriot DDR3-2400 G.Skill DDR3-2133
RAM Speed DDR3-1600 DDR3-2133
RAM Timings 8-8-8-24 9-11-9-24
GPU (for total 3DMark Score Only) ASUS Matrix 5870 Platinum ASUS Matrix 5870 Platinum
Operating System Windows 7 x64 Windows 7 x64

The two boards are separated by a lot more than benchmarks at identical settings with their sizable feature set differences, but for this comparison testing against each other works well. Due to these similarities with the P67 Extreme 6 review, you will see some of the same numbers used here.

The results graphed in the performance section were obtained by operating the CPU at its stock speed (3.4 GHz) and the RAM at the speeds referenced above. Benchmarks were run three times and the results were averaged.

The graphs you will see are all normalized to the baseline DDR3-1600 / 8-8-8-24 results. The DDR3-1600 set is always 100% and results from the G.Skill Ripjaws kit are expressed and graphed as percentages relative to its results. The actual benchmark results are in parenthesis below the percentage.

Stability Testing

Before performance testing, it’s always good to look at stability. Ultra-X has generously supplied their RAM stress tester, the R.S.T. Pro 3 PCI Express. There are only a couple of review sites that have one of these and we are proud to be one of them. It’s not your standard Memtest++ bootable CD. This is a standalone, bootable piece of hardware that plugs into a PCIe x1 slot and, man, does it ever beat on some RAM. By the time the tests finish, the sticks can get quite toasty.

Several manufacturers use this to test their memory before it goes out the door to reduce RMAs. If it passes this test, it is stable and then some. Manufacturers generally run the full memory test for three passes. We’re overclockers though and tend to abuse sticks a little more than other people, so for our purposes, five passes sounds good. Usually I go with six passes, but with 8GB worth of RAM, five already took three hours, and three hours of absolutely hammering RAM more that it will ever experience in every day use should be sufficient.

R.S.T. Pro 3 Passed
R.S.T. Pro 3 Passed

They passed with flying colors. The only items changed in UEFI were manually setting the recommended voltage (1.65 V), rated speed (DDR3-2133) and first four timings (9-11-9-28). No other tweaking was necessary and they were solid as a rock. This is both a testament to the strength of these sticks and the strength of the Sandy Bridge IMC. We couldn’t ask for more!


We’ll start with 3D Benchmarking, then go to real-world comparison (compression & rendering) and then end with some 2D benchmarking.

3D Benchmarking

Scores in 3DMark06 and 3DMark Vantage are both quite dependent on scores generated by benchmarking the CPU. RAM certainly will make a difference in these subtests; but which do they prefer – timings or MHz? Both is obviously preferable, but what if you only have one or the other?

3DMark06 and 3DMark Vantage
3DMark06 and 3DMark Vantage

Interestingly, the largest score difference on the graph – 3DMark06 total score – prefers the faster MHz with loosened timings; but the CPU test itself seems to prefer timings to MHz. Vantage prefers the faster kit in both instances. It seems this kit would be well suited to gamers trying to squeeze out every last FPS.

Rendering & Compression

These results are important to every computer user, especially 7zip. Everyone compresses or decompresses files at some point and anything that goes toward making that faster is a win. For anyone that renders regularly, they know every second shaved off those tasks means increased productivity overall.

7zip, Cinebench R10 and Cinebench R11.5
7zip, Cinebench R10 and Cinebench R11.5

Both 7zip and Cinebench R11.5 show a gain with the Ripjaws kit. Cinebench R10 shows a slight loss, but take that with a grain of salt. In such tight competition, R10’s well known score variations can account for any differences in either direction. R11.5 and 7zip are both more consistent with their results and both tip their hat to the Ripjaws.

2D Benchmarking

Wprime historically doesn’t really care about RAM. I know several benchmarkers that run it with just one stick installed and (within reason) it doesn’t seem to care how fast that stick runs.

WPrime 32M and WPrime 1024M
WPrime 32M and WPrime 1024M

It does seem to make a slight difference here, especially in WPrime 32M, one of the shortest benchmarks in our suite today; it seems to prefer timings to Mhz. The much longer test, WPrime 1024M, definitely doesn’t seem to mind either way.

SuperPi and PiFast are where we see the biggest benefit to changing RAM most of the time. SuperPi 32M is especially attuned to those changes.

SuperPi 1M, SuperPi 32M and PiFast
SuperPi 1M, SuperPi 32M and PiFast

Across the board in these RAM-sensitive benchmarks, the faster memory shows its muscle even with loosened timings. While 2.72% doesn’t seem like much in SuperPi 32M, with such a long benchmark you’re talking about 15 seconds, which can easily mean the difference between first place and 50th.

Synthetic Bandwidth and Latency

Of course, what memory review is complete without showing latency and bandwidth numbers?

Patriot DDR3-1600 at 8-8-8-24
Patriot DDR3-1600 at 8-8-8-24

G.Skill RipJaws DDR3-2133 at 9-11-9-28
G.Skill Ripjaws DDR3-2133 at 9-11-9-28

Again, the higher MHz kit shows strong gains across the board, increasing write bandwith by 877 MB/s, copy bandwith by 1852 MB/s and read bandwidth by a whopping 2570 MB/s. Latency was also reduced by 4.2 ns, an 8% improvement.

Final Thoughts & Conclusion

In past memory reviews, there hasn’t been a massive difference in performance from one set to the next. You need a combination of higher MHz and lower timings to equate to a large performance increase. That said, we’re dealing with 8GB of memory here. Before recently it was unheard of to have high density sticks operating at such blazing speeds with solid timings.

You probably noticed there was no overclocking section. Unfotunately the motherboard I had does not have a UEFI that plays well with the combination of the DDR3-2133 memory multiplier and BCLK increases. It’s not the RAM either; I tried it with a kit of DDR3-2400 (the G.Skill Pi kit reviewed here) to no avail. I chalk this up to a new platform with a still relatively young UEFI.

Even if there were an overclocking section, it couldn’t go all that far. The highest I’ve been able to push this CPU was to 106 BCLK (different UEFI with a lower memory multiplier), so you’re looking at roughly DDR3-2225’ish max. Regardless, straight-up benchmarkers that push memory’s limits aren’t going to be using a 2 x 4GB kit to show off high frequencies.

These sticks are going to be used by ‘normal’ folks on a Sandy Bridge system. They will either run the system stock or push its overclock by simply raising the multiplier. This kit will run at its rated speed very well and have certainly shown an advantage over a 2 x 2GB kit running at DDR3-1600 / 8-8-8-24. Add that to the fact that you’re looking at a sizable 8GB of system memory and this is a great product for every day use.

The G.Skill Ripjaws DDR3-2133 / 9-11-9-28 8GB kit retails for $199.99 at Newegg, which isn’t too bad considering the speed combined with a two-stick, eight-gigabyte kit. The only other 8GB kit listed with these speeds is one from Kingston that comes in a 4 x 2G configuarion (which can be harder to stabilize) and it’s $8.01 more expensive, making this G.Skill kit the clear price winner.

The absolute, unquestionable stability at such fast speeds for an 8GB kit, plus the performance gains seen here, when combined with such a strong overclocking platform in Sandy Bridge definitely adds up to make this kit Overclockers Approved.

Jeremy Vaughan (hokiealumnus)

About Jeremy Vaughan 197 Articles
I'm an editor and writer here at Overclockers.com as well as a moderator at our beloved forums. I've been around the overclocking community for several years and just love to sink my teeth into any hardware I can get my paws on!


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  1. I have this exact set and am very happy with it. I run it at 1950 with 9-9-8-26 timings. I used resistors to knock the fans down to 7 volts, more to dim the LEDs than for the noise. It is a great kit for sure.
    That's a good idea. I had a 3-pin fan to 4-pin molex adapter that I plugged in a fan controller. Truth be told, it was because I had a fan header sticking out of the benching station and didn't have a MOLEX doing the same. At full they're plenty quiet, but you are right that they are quite bright.
    Thanks for the feedback!
    I actually used the resistors that came with the Corsair fans for my H70. I just cut them out of the adapters and wired them into the ram cooler. The main issue for me was really the color. The rest of my system is red themed. Along with the 7 volt mod I also used a sanding wheel on a dremel to "cloud" the lenses so the blue light would be more diffused and also bent the LEDs in towards the motherboard. Over all it came out o.k.
    G.Skill makes some great RAM. The only RAM I would regularly recommend over G.Skill is the Corsair GTX2 Hyper-IC kit. Of course, those cost $200-per-2GB stick, so they'd darn well better be the best. Aside from that, G.Skill tends to have some of the best performance-per-dollar RAM IMHO. There are others that are just fine of course, I just like G.Skill and have since my days at abit.
    Hey Hokie,
    I was reading your most recent GSkill 32GB kit review...:thup: and saw that you still have these for reference.
    Have you tried running this kit at DDR3-2400 with relaxed timings on IB?
    I don't have an IB designed/spec kit yet so I gave these a shot with my 3570K...
    I just manually set the primary and left the secondary settings on auto.
    Your kit is definitely stronger than mine, but still...it's pretty sweet it'll do 2400 with loosened timings!

    CL10 just doesn't work for this kit. Haven't tried raising voltage, just doing 1.65V. :)
    EDIT - Still at 1.65V, they did end up tightening a little bit, with a tRP of 10. The only thing they can't match on yours is CL, though I haven't tried 1T. This is a solid kit. :thup:
    I have two separate kits that have 03/11 and 04/11 manufacture dates.
    They both are able to pass 32M at 10-12-10-30 (1T).
    No boot @ DDR3-2600 10-12-12-31 (2T) or DDR3-2400 11-11-11-31 (2T).
    I also can't seem to boot with four dimms populated @ DDR3-2400 10-12-12-31 (2T) but they do seem able to run with four dimms at stock settings 9-11-9-28 (2T).
    These are probably hynix chips so they won't run at 2600+ cl10 also why 10-12-12 ? ... these timings are generally for samsung IC in new kits like TridentX.
    2400 should run @ tRCD 12+ , 2600 @ tRCD 13-14+ so for 2600 try something like 11-13-12 or 12-14-13. 2400 is probably already on max.
    These are probably hynix chips so they won't run at 2600+ cl10 also why 10-12-12 ? ... these timings are generally for samsung IC in new kits like TridentX.
    2400 should run @ tRCD 12+ , 2600 @ tRCD 13-14+ so for 2600 try something like 11-13-12 or 12-14-13. 2400 is probably already on max.

    Thanks for input... I agree and think these are Hynix. I didn't really no what timings to try... so I copied in Primary timings from the current 2400/2600 offerings. It make sense though about Samsung and Hynix preferring a different set of timings.