Test System:

Two Latency tests were performed which reveals how well the current systems perform over previous generations using lower latency memory. The lower the timings of the memory modules, the quicker data can be accessed and utilized. The higher the timings, the longer memory takes to read and write slowing performance. Depending on the programs and applications being used, average users won't be able to tell the difference between lower and higher latency memory in their system. To better show the benefits of lower latencies, both the Bandwidth and Cache-Memory benchmarks were performed.

4-4-4-15 Memory Timings (Lower is Better)

5-5-5-9 Memory Timings (Lower is Better)

The Cache-Memory benchmark reveals the benefits from lower latency timings working with your processor. The particular points to notice besides the graph are the Combined Index and Speed Factor. CAS5 timings score 20380 MB/s while CAS4 score 21728 MB/s which is a decent gain.

4-4-4-15 Memory Timings (Higher Index is Better)

5-5-5-9 Memory Timings (Higher Index is Better)

Where all these lower latencies matter is when you use an application that really pushes the memory to load such as compilation, video, and audio programs. While the processor will do the bulk of the work, the memory can be a big help. Often, 3D graphic intensive programs like 3D Rendering and video games will benefit the faster, lower latency memory. And being that this Patriot PC2-6400 Extreme is a dual channel 2GB memory kit just adds to the benefits since large programs can load quicker and experience much less bottle necks.
 
To test the memory's bandwidth capability and stability from 800MHz to 1000MHz, the system's Front Side Bus was slowly increased in Linked mode so that the memory's frequency would also increase. These results are also pretty typical if you are on a 975X or NVidia 590 SLI chipset or older system with the same characteristics.

800MHz @ 4-4-4-15

918MHz @ 4-4-4-15

1000MHz @ 5-5-5-15

The Patriot PC2-6400LLK Extreme memory held its stock 4-4-4-15 memory timings up to 918MHz using 2.2 volts before reaching its CAS4 limits. The system wasn't completely stable above this frequency, so the memory timings were set to 5-5-5-15. Using 2.3 volts with 5-5-5-15 memory timings, the memory finally topped out at 1000MHz. At this point, the memory's limit had been reached as anything above 1000MHz just couldn't quite pass MemTest no matter how much voltage was used.

Unlinking the Memory and FSB, allows the more aggressive ECS PN2-SLI2 680i Motherboard to maximize the Patriot memory's bandwidth. Rather than post the same results, here is the screen shot of the Sandra Memory Bandwidth results. The memory scored a maximum of 7503 MB/s of bandwidth. It's obvious the memory is capable of more under a killer motherboard platform with a little more voltage.

Maximum Memory Bandwidth 2.3v @ 5-5-5-15 Timings

Fear, Code Creatures, and Battlefield 2142 performances revealed that the memory was very stable during the entire test spectrum. The Fear test demo reported 111 and Code Creatures reported 124 average frames per second with the memory at 800MHz. Increasing the memory frequency to 1000MHz, increased Fear's average to 129 frames per second and Code Creatures reported 142 average frames per second. This means if your system needs another 10 to 20 frames to be perfectly playable or you just like more game performance, then you have the extra frequency head room that comes with the Patriot PC2-6400LLK Extreme memory if you want to tap in to its 1000MHz frequency potential.

Thank You, Patriot Memory!

What about thermal or over-voltage issues? Of course, the memory will emit a little more heat when running at 1000MHz, but it won't be as though you are trying to overclock regular memory that is specified for 800MHz operations only. That's really when heat and stability issues pop up. In the case of the Patriot PC2-6400LLK Extreme Performance memory, it's already built in. Patriot expects you to eventually push the memory farther than the standard specifications. With all these things considered, the answer is simply, there aren't any.

All things considered, based on the memory's stability, performance, and value, Patriot Memory's modules would be a great addition to proprietary and private computer systems alike. Patriot Memory products have often been the best value across the board. These particular modules have been spotted over the last couple weeks for under the $200.00 level at Newegg, which is actually a very, very good deal at present. Some of the deals have been adding rebates to sweeten the buy. And with the release of the 680i Chipset based motherboards which have the BIOS ability to overclock the processor independently, one could look to their standard modules without worry to save a bit more money. But, with a value that the PC2-6400LLK Extreme memory kit presents, it would be a shame to pass it up.

Conclusion:

It's always a nice benefit when you purchase a product that has hidden potential not listed on the packaging or features. The PC2-6400LLK Extreme Performance memory is one of those particular products that is an example of a good cost-benefit ratio. You go in to the store or online to buy some nicely priced DDR2 memory and get the same modules found in their PC2-8500 built in to the their LLK series. Whether you're an avid overclocker or regular PC user, this allows you to use the memory in some newer upgrades in future systems.

If you've looked at the prices of memory modules set to run at PC2-8000 or higher by default, then you already know that the prices approach the $275 and higher dollar amount. Despite the memory's great performance, the Patriot Extreme modules can currently be found for under $200 at newegg.com. If you're looking for a great "bang for the buck" memory kit that can perform very well and keep you up to date with future upgrades, then the PC2-6400LLK Extreme Performance memory will be perfect.