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Appeared on: Tuesday, May 13, 2008
OCZ ReaperX PC2-6400


1. The package

OCZ's high-performance modules will support the latest games and top of the line multimedia programs with a 4GB capacity, combined with the high frequencies and aggressive bandwidth for maximum system stability. Rated at DDR2-800 with 4-4-3 timings, the new PC2-6400 ReaperX promise to provide exceptional latencies for the extreme enthusiast and gamer.

The ReaperX series provides enthusiasts leading-edge cooling technology, with each memory chip in direct contact with a thermo-conductive pipe that guides heat away and quickly dissipates it through the aluminum fin array.

Featuring an EPP (Enhanced Performance Profiles) programmed SPD, PC2-6400 Reaper X modules will immediately boot at the rated specs on the latest generation of NVIDIA SLI chipsets. Although the OCZ Reaper X series caters to enthusiasts, EPP eliminates the need for manual configuration and makes the benefits of overclocking available to the complete range of consumers looking to get the most out of their systems.

As one of OCZ’s legendary Enhanced Bandwidth (EB) editions, the ReaperX 4GB kit increases effective memory bandwidth through the optimization of memory latencies between the system memory, the chipset, and memory controller, resulting in the ideal balance of speed and enhanced timings.

- Main features

Special Features

* ReaperX HPC (Heat Pipe Conduit) modules offload heat with extreme efficiency due to a new dual copper heat pipe design. Each memory chip is in direct contact with a thermo-conductive pipe that guides the performance robbing heat away from key memory components and quickly dissipates it through the aluminum fin array. The addition of the extended fin array nearly doubles the total surface area available for heat dissipation while the heat pipes warrant near isothermicity throughout the entire design. The result is a doubling in effective heat dissipation at equal delta t or, in real systems, a significantly lower operating temperature of the memory modules.


* 2.20V EVP
: OCZ EVP (Extended Voltage Protection) is a feature that allows performance enthusiasts to use a VDIMM of 2.20V without invalidating their OCZ Lifetime Warranty.

- Retail package

OCZ provided us the retail package of 2x2GB memory modules (OCZ2RPX800EB4GK). The retail price of the kit is around $140, depending your location and currency. The memory modules come packaged in a plastic shell.

On the modules you can see a small logo with the part number and an indication of the memory's ratings at 800MHz. The rating of 4-4-3-15 at 800MHz, when paired with an Nvidia 680/780i chipset are very convenient, especially with voltages going up to 2.2.V, without losing the warranty.

The black aluminium heatsinks on the outside are designed to dissipate the heat from the surface of the memory module. The finish is matte black and you will also find a black aluminum plate which covers both sides of the chips and the PCB. The heat adsorbed by the shields travels through two copper heat pipes which are not rounded but flat. The heat is then dissipated via several thin aluminum fins. In theory that should work very efficiently and it could give us more room for overclocking.

CPU-Z v1.44 provides more information about the memory. The OCZ2RPX800EB4GK has embedded standard JEDEC timings for 333&400 frequencies, which are rather high. With a motherboard that supports EPP profiles (nvidia based), you will get automatically tighter and better timings of 4-4-3-15-2T@2.0V.

For this test we used an Asus motherboard with Intel's X38 chipset and the latest available BIOS v1004. For our benchmarks and stability tests, we used Memtest86+ v2.01, Everest Ultimate Editiona and Sisoft Sandra.


2. Test Setup

In order to test memory modules we used the following setup:

While for benchmarking we used:

We used the various built-in X38 FSB:DRAM dividers so we kept the cpu at stock speed. This allowed us to eliminate any possible problem that could be caused by overclocking. Below are the best timings we managed to get, as well as, the maximum modules speeds:

CPU:RAM ratio
Real Frequency
FSB
Voltage
400,00
333
2.20
417,50
333
2.20
443,50
333
2.20
501,00
333
2.20
DDR2 1066 5-5-5-15
533,00
333
2.20
543,00
362
2.20

At 400MHz, we have the promised 4-4-3-10-2T , which can also be used for up to 417.50MHz. After that point we have to enter CL5 and up to 500MHz, we have to set timings at 5-5-5-15-2T at 2.20V. The 533MHz comes easily and the top frequency was around 1089MHz. According to other tests, these modules can go up to 1122MHz, which seems reasonable. However, overclocking memory with an Intel based motherboard is not the easiest task, especially if you consider that we are talking of a 2x2GB module kit.


3. Benchmarks, SiSoftware Sandra, Everest Ultimate Edition 2007

SiSoftware Sandra (the System ANalyser, Diagnostic and Reporting Assistant) is an information & diagnostic utility. It provides most of the information (including undocumented) you need to know about your hardware, software and other devices whether hardware or software. It works along the lines of other Windows utilities, however it tries to go beyond them and show you more of what's really going on. Giving the user the ability to draw comparisons at both a high and low-level. You can get information about the CPU, chipset, video adapter, ports, printers, sound card, memory, network, Windows internals, AGP, PCI, PCIe, ODBC Connections, USB2, 1394/Firewire, etc.

Sisoft Sandra offers two tests, unbuffered and buffered. Below you can see the average scores.

The performance starts from 6.50MB/sec at 800MHz and reaches the 7.0MB/sec at 500MHz.

- Everest Ultimate Edition 2007

Click for official website!EVEREST Ultimate Edition is a leading system diagnostics and benchmarking solution for enthusiasts PC users, based on the award-winning EVEREST Technology. During system optimizations and tweaking it provides essential system and overclock information, advanced hardware monitoring and diagnostics capabilities to check the effects of the applied settings. CPU, FPU and memory benchmarks are available to measure the actual system performance and compare it to previous states or other systems. Furthermore, complete software, operating system and security information makes EVEREST Ultimate Edition a comprehensive system diagnostics tool that offers a total of 100 pages of information about your PC. The software has build-in several tests for memory and CPU/FPU.


4. Final words

OCZ has a new 2x2GB memory proposal with the OCZ2RPX800EB4GK product. While the memory is rated "only" at 800MHz (PC2-6400), it proved to be capable of reaching up to 1100MHz. Of course, the ultimate performance can be achieved using a corresponding motherboard, probably based at Nvidia's 680/780i chipsets. The 2x2GB kit promises CL4 at 800MHz with 2.00V, which was confirmed in our tests using an Asus Maximus Formula motherboard(Intel X38 chipset). Rising up voltage to 2.20V will also get a CL5 at 1000MHz and at 1067Mhz.

The included memory cooling system called ReaperX HPC (Heat Pipe Conduit) is also a pleasant add-on and from our small experience, it seems to effectively keeping memory modules cool, even when overclocking. Of course their height could make it difficult to be installed in small PC cases. Anyway we have no problem suggesting this memory kit to anyone who needs a 2x2GB module, especialy if if you are running any x64 operating system. The modules are available for $160, and hopefully they will become your companion for quite some time. Nice product OCZ :-)



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