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 number | sSpec number | Frequency | GPU frequency | L2 cache | I/O bus | Memory | Voltage | TDP | Socket | Release date | Part number(s) | Release price ( USD ) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Atom E620 | SLH56(B0)SLJ32(B1) | 600 MHz | 320 MHz | 512 KB | PCIe | 1 × DDR2-800 | 0.8–1.175V | 3.3 W | FC-BGA 676 | September 14, 2010 | CT80618005844AA | $19 |
| Atom E620T | SLH5N(B0)SLJ36(B1) | 600 MHz | 320 MHz | 512 KB | PCIe | 1 × DDR2-800 | 0.8–1.175V | 3.3 W | FC-BGA 676 | September 14, 2010 | CT80618005844AB | $22 |
| Atom E640 | SLH55(B0)SLJ33(B1) | 1 GHz | 320 MHz | 512 KB | PCIe | 1 × DDR2-800 | 0.8–1.175V | 3.6 W | FC-BGA 676 | September 14, 2010 | CT80618005841AA | $29 |
| Atom E640T | SLH5M(B0)SLJ37(B1) | 1 GHz | 320 MHz | 512 KB | PCIe | 1 × DDR2-800 | 0.8–1.175V | 3.6 W | FC-BGA 676 | September 14, 2010 | CT80618005841AB | $37 |
| Atom E660 | SLH54(B0)SLJ34(B1) | 1.3 GHz | 400 MHz | 512 KB | PCIe | 1 × DDR2-800 | 0.8–1.175V | 3.6 W | FC-BGA 676 | September 14, 2010 | CT80618003201AA | $54 |
| Atom E660T | SLH5L(B0)SLJ38(B1) | 1.3 GHz | 400 MHz | 512 KB | PCIe | 1 × DDR2-800 | 0.8–1.175V | 3.6 W | FC-BGA 676 | September 14, 2010 | CT80618003201AB | $64 |
| Atom E680 | SLH94(B0)SLJ35(B1) | 1.6 GHz | 400 MHz | 512 KB | PCIe | 1 × DDR2-800 | 0.8–1.175V | 4.5 W | FC-BGA 676 | September 14, 2010 | CT80618007035AA | $74 |
Question:
Name the memory for meodel number for atom e640t
Answer:
1 × DDR2-800