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


The introduction ...

In this current OC review the CompuStocx PC3-10600 4GB DDR3 Dual Channel memory kit is extensively tested.
The review contains the performance of these modules and of course also the overclockability, which is compared with some other memory modules.
Memory modules without heat spreader are often not very well overclockable, because usually the module voltage has to be increased, in order to reach higher overclocking results.
That inevitably produce a higher heat dissipation, which should be exhausted with memory heatsinks.
However, in the previous memory review Crucial showed with their RAM kit without heatspreader that one can also achieve good OC results without voltage increasement.
So the suspense continues how high this CSX DDR3 kit can be overclocked.




Thanks for the support ...

Many thanks for the support with the CSXO-D3-LO-1333-4G-2KIT 4GB PC3 10600 / DDR3 1333 CL9 kit
by the manufacturer CompuStocx.

The 4 GB CSX Original kit contains 2x 2048 MB 240-pin DIMM DDR3-1333 memory modules and has a recommended manufacturer price of approx. 99,90 Euro (12/2009).
Memory modules are available CompuStocx Shop 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:



That is contained in the scope of delivery ...

CompuStocx supplies the two memory modules with a quick installation guide.

This CompuStocx DDR3 RAM kit was delivered without datasheet and without a quick installation guide.
The technical data on the label were not very complete, so one should take a look at the manufacturer homepage before beginning with the memory installation.

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


Here is the back side of the CompuStocx modules ...



The technical data ...

Manufacturer CompuStocx
Article number CSXO-D3-LO-1333-4G-2KIT
10014523 / 4250312503034
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 9-12-12-30 2T (CAS-TRCD-TRP-TRAS)



Characteristics and other features ...

The memory modules are delivered without heat spreader (heatsinks), so it is necessary to keep an eye on the RAM temperature during higher overclocking.
Alternatively one can mount a passive or active memory cooler, which are available in different versions e.g. at our sponsors or
Officially these CSX modules are designed for the JEDEC standard voltage of 1.50 V for DDR3 modules.



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

It can occur that the memory capacity is only indicated as approx. 3GB instead of the 4GB.
4GB DDR, DDR2 or DDR3 RAM size or any size with more than 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 680 / 1360 MHz,
which is only a little bit more than the manufacturer default of 666/1333 MHz.

Here is a Snipping screenshot of CPU-Z with 680 / 1360 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 values and timings depends directly from each other.
But officially CSX specify only a voltage of 1.50 Volt without loosing the warranty.
So the voltage should not be increased very much without further cooling modifications.

The benchmark comparison of all DDR3 memory modules were tested with the default 1.53 V,
where these CompuStocx 4GB modules reached 1360 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 CompuStocx modules the highest voltage is 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
204 MHz * 6,66 = 1360 MHz
fix (8-8-8-24 2T)
1.53 Volt
12,29 GB/s
21,25 GB/s
83 ns
204 MHz * 6,66 = 1360 MHz
fix (8-8-8-24 2T)
1.53 Volt
12,29 GB/s
21,25 GB/s
83 ns
200 MHz * 6,66 = 1333 MHz
SPD (9-12-12-30 2T)
1.53 Volt
11,86 GB/s
20,84 GB/s
93 ns

By the way, the "Memory Bus Range" is no benchmark value, but this value is quite simple to calculate by the frequency and
this 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 the JEDEC standard voltage of 1.50 V only very slightly and was thereby clearly under the DDR3 modules tested so far like e.g. the previous Crucial PC3-10600 CL9 kit.
Also with a small increasement of the VMem (memory voltage) the overclocking value wasn't much higher.
Only the values on manufacturer defaults without any overclocking could keep up with the previous tested DDR3 kits, because here the RAM voltage and RAM timing were set to default values.


Result and general impression ...

The CompuStocx PC3-10600 4GB original CSX RAM kit CSXO-D3-LO-1333-4G-2KIT is designed to upgrade a PC or Mac system with more memory on standard voltages and default timings.

However, this CSX PC3-10600 4GB RAM kit is not recommendable for Overclocker, because in the test out of the manufacturer defaults only small increases were possible and the kit could be overclocked just a little bit with increased voltage levels.

All in all the DDR3 kit is thus clearly for the mainstream market and is thereby more interesting for memory upgrades with smaller budget or for OEM systems.


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


All pictures and article copyright 2009