The official specification of Patriot Memory PDC1G5600ELK modules can be obtained at the manufacturer’s website :
- Frequency: 700MHz
- Timings: 3-5-5-9 at 2T Command Rate
- Voltage: 2.8-2.9V
- One kit includes two 184-pin 512MB unbuffered non-ECC modules of DDR SDRAM
- The modules are equipped with red-colored ribbed aluminum heat-spreaders
- Lifetime warranty
The specification betrays how Patriot made its modules stable at 700MHz. The trick is in the obviously slack timings and in the Command Rate parameter increased to 2T. We want to remind you that the DDR SDRAM manufacturers haven’t yet dared to increase RAS# to CAS# Delay and RAS# Precharge to 5 cycles – such latencies are typical for DDR2 SDRAM rather. The higher Command Rate also negatively affects the performance of an Athlon 64 system, as a rule.
Well, we’ll have some performance tests shortly, but we want to note another stipulation made in the documentation on the modules. It says that this product is tested for compliancy with its specification on mainboards from the DFI LANParty UT NF4 series. The manufacturer doesn’t guarantee Patriot PDC1G5600ELK to work on other mainboards at 700MHz frequency. They act wisely here since only highest-quality overclocker-targeted platforms are capable of stable operation at 350MHz clock-gen frequency (i.e. when the memory is clocked at 700MHz).
In a nutshell, there’s nothing extraordinary about Patriot PDC1G5600ELK modules. PDP Systems “invented” a marketing product to impress a sensitive overclocker. The manufacturer didn’t have to do much to put the DDR700 tag on the product and this memory doesn’t have any advantages except its high rated frequency (and theoretical bandwidth).
Let’s see what is written into the modules’ SPD.
The SPD information is rather strange. There are two sets of parameters here: DDR606 with 2.5-5-5-11 timings and DDR714 with 3-6-6-13 timings. We don’t pretend to understand the reasons for the engineers to program the modules’ SPD this way but these parameters should allow you to start up your computer and enter the BIOS to correct the settings on almost any Athlon 64 mainboard. As for booting the OS up, our DFI LANParty UT NF4 Ultra-D mainboard couldn’t boot Windows XP until we manually configured the latencies and DIMM voltage.