Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Model | Released | Form factor | Chipset | Memory Type | Max. Memory |
| --- | --- | --- | --- | --- | --- |
| Precision M6500 | Dec 2009 | 17" | Intel PM55 | DDR3 1066/1333/1600MHz | 32GB |
| Precision M6400 | Sept 2008 | 17" | Intel Q43 | DDR2 PC6400 800MHz & DDR3 1066 | 16GB |
| Precision M6300 | Aug 2007 | 17" | Intel 965PM Express | DDR2-667 | 8GB |
| Precision M4500 | May 2010 | 15.6" | Intel QM57 | DDR3 1066/1333MHz | 16GB |
| Precision M4400 | Jan 2009 | 15.4" | Intel PM45 | DDR2 800MHz | 8GB |
| Precision M4300 | 2007 | 15.4" | Intel PM965 | DDR2 PC5300 667MHz | 8GB |
| Precision M2400 | 2009 | 14.1" | Intel PM45 | DDR2 800MHz | 8GB |
| Precision M2300 | 2007 | 14.1" | Intel PM965 | DDR2 PC6400 800MHz | 4GB |
| Precision M90 | 2006 | 17" | Intel 945PM Express | DDR2-533 / DDR2-667 | 4GB |
| Precision M65 | 2006 | 15.4" | Intel 945 | DDR2 | 4GB |
| Precision M70 | 2004 | 15.4" | Intel 915PM Express | DDR2-400 / DDR2-533 | 2GB |
| Precision M20 | 2004 | 14.1 | Intel 915PM | DDR2-400/533 | 2GB |
| Precision M60 | 2003 | 15.4" | Intel 855PM | DDR | 2GB |
| Precision M50 | 2002 | 15.0" | Intel 845MP | PC2100 DDR | 1GB |
| Precision M40 | 2001 | 15.0 | Intel 815 | PC133 | 512 MB |
Question:
Whas is the released date of the memory type ddr2-667?
Answer:
Aug 2007