CompuStocx 4GB Kit (2x2048MB) PC3-10600/DDR3-1333 Memory Review


The introduction ...

The CompuStocx CEC3 PC3-10600 4GB DDR3 Dual Channel memory kit is equipped with heat spreader and the design is looking very nice. In the current OC review the 2x2GB DDR3 memory kit was extensively overclocked, to test the results of these CSX OC modules inside and outside the specifications.




Thanks for the support ...

Many thanks for the support with the CSXO-CEC3-1333-4GB-KIT 4GB PC3 10600 / DDR3 1333 CL9 kit by CompuStocx.

The 4 GB CSX Original kit contains 2x 2048 MB 240-pin DIMM DDR3-1333 memory modules and has a price of approx. 100 Euro (01/2010).
These memory modules are available at CompuStocx and at our sponsors.



The supply of the two 2048MB PC3-10600 memory modules ...

In this plastic box are the two well protected memory modules:


On the back side one can already take a first look to the memory modules:



That is contained in the scope of delivery ...

CompuStocx delivers the CEC DDR3 modules with a quick installation guide.
Very positive is that the flyer also contains all important technical data of the modules.
This is very exemplary and that is not to be taken for granted, even if the technical information are very important to install memory modules in a PC or Mac.

Here is a picture of the two CSX DDR3 memory modules:



The technical data ...

Manufacturer CompuStocx CSX original
Article number CSXO-CEC3-1333-4GB-KIT
Memory 4GB kit (2048MBx2)
Package 240-pin DIMM
Type DDR3 PC3-10600
Configuration 128M x 8
Error correction NON-ECC
Speed DDR3 1333 (200 MHz * 6,66)
Voltage 1.50 Volt
Memory timing 9-9-9-24 2T (CAS-TRCD-TRP-TRAS)



Characteristics and other features ...

The memory modules are provided on a PCB with a passive heatsink (heatspreader), which is supposed to enhance the memory cooling also with higher frequencies and/or higher voltages.
Thus one can achieve a longer life-time and better overclocking results, whereby for oc'ing higher voltages are necessary.
These modules are officially designed for a JEDEC standard voltage of 1.50 Volt for DDR3 modules.



Not the full 4GB during booting, but only 3GB in the BIOS or operating system ...

Depending on the operating system and/or BIOS setting, it can occur that the memory capacity is only indicated as approx. 3GB instead of the 4GB. 4GB RAM size or any memory size over 2GB is still a case sui generis.
Here at is a guide which contains among other things a table, how much RAM is supported by operating systems.



Benchmark values and test results ...

Let us continue with the most important part of the test report, the highest possible stable performance.
The test results are based on an ASRock M3A790GXH/128M motherboard with an AMD Phenom II 710 X3 CPU on different frequencies depending on the reference clock for the different memory benchmarks.
The multiplier adjustment remains on 13x with all frequencies, because an adjustment for the CPU in half multiplier
steps would be too inaccurate to get nearly the same CPU frequency for all tests.
Microsoft Windows 7 RC Ultimate Edition is used as the operating system.
The stability was examined with the software Memtest86 and SiSoft Sandra Lite 2009 SP3 program is used for all
benchmarks, since it offers extensive adjustments and a fast result comparison.
BTW. the latest SiSoft Sandra 2009 version is available on our download server and can be downloaded much faster.
All benchmarks are also included in the free Sandra Lite version.

First the maximum possible frequency of the memory module was determined with default 1.50 Volt (1,53V).
The memory frequency was increased in small steps with a fixed memory timing of 8-8-8-24 2T and default memory voltage, as long as the detailed memory test with Memtest86 runs without any errors.
This quite long testing time ensured that this frequency works really stable with these modules.

The highest possible frequency with 8-8-8-24 2T (CAS-TRCD-TRP-TRAS) timings and 1.53V was only 700 / 1400 MHz,
which is only a little bit higher than the default of 666/1333 MHz.

Here is a Snipping screenshot of CPU-Z with 700 / 1400 MHz and 8-8-8-24 2T with 1,53 Volt:


It was possible to run a bit higher frequencies with increased voltages or lower timings, because the frequency and timings depends directly from each other.
But officially CSX specify only a voltage of 1.50 Volt without loosing the warranty.
Of course we have tested the modules also with higher voltages, but the result was not much higher.
Also with 2.00 Volt, this kit reached on CL8 just a bit more than 700 MHz (DDR3-1400).

The benchmark comparison of all DDR3 memory modules were tested with the default 1.53 V,
where these CompuStocx 4GB modules reached 1400 MHz without any errors.
This highest possible clocking on the default DDR3 voltage was compared now with two other settings.
On the one hand they were tested with 200 MHz reference clock x6,66 = 1333 MHz and SPD values
(SPD values are programmed in the SPD IC by the manufacturer).
On the other hand the highest possible frequency with the permitted manufacturers voltage was determined at 8-8-8-24 2T. But in case of these CSXO-CEC3-DDR3 modules the highest voltage was identical with the lowest test voltage, so the second test is equal to the first result.

With a frequency of approx. 667 MHz the timings by SPD EEPROM autodetection were 9-12-12-30 2T (CAS-TRCD-TRP-TRAS).

Here is a Snipping screenshot of CPU-Z with 666.7 / 1333 MHz and 9-12-12-30 2T:


Here are the SiSoftware Sandra 2009 benchmark results:

RAM Range
Int Buff'd iSSE2
Memory Bus Range
210 MHz * 6,66 = 1400 MHz
fix (8-8-8-24 2T)
1.53 Volt
12,68 GB/s
21,88 GB/s
80 ns
210 MHz * 6,66 = 1400 MHz
fix (8-8-8-24 2T)
1.53 Volt
12,68 GB/s
21,88 GB/s
80 ns
200 MHz * 6,66 = 1333 MHz
SPD (9-12-12-30 2T)
1.53 Volt
11,83 GB/s
20,84 GB/s
92 ns

The "Memory Bus Range" is no benchmark value, but this value is quite simple to calculate by the frequency and this value is useful for a benchmark comparison.


Here's a diagram of the benchmark values:


Here is a direct benchmark result comparison of some DDR3, DDR2 and DDR memory modules:


The CompuStocx PC3-10600 kit could be overclocked with JEDEC standard voltage of 1.50 V only very slightly and was thereby only a little bit over the previously tested CSX Original PC3-10600 4GB memory kit without RAM cooler.
Also a high memory voltage increasement only result in a few more megahertz and here should be the strengths of OC modules.


Result and general impression ...

The CompuStocx PC3-10600 4GB Original CSX RAM kit CSXO-CEC3-1333-4GB-KIT reached only low overclocking results in spite of good cooling with heat spreader.

Thereby it is rather designed for standard voltages and default timings.
Optically, the CSX PC3-10600 4GB RAM kit is very interesting, the performance on default settings is also good and the enclosed technical data sheet is exemplary, however the overclocking results were clearly under expectations.

All in all the DDR3 kit is with these results rather interesting for OEM PC systems and less for high-end OverClockers.
For the upper OverClocking range, the Diablo series from CSX should be clearly preferred, which were already overclocked as DDR2 modules in the hardware test column.


Read on in the hardware test area with several hardware reviews ...


All pictures and article copyright 2010