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 | Turbo | Cores | L2 cache | L3 cache | I/O bus | Mult. | Memory | Voltage | TDP | Socket | Release date | Part number(s) | Release price ( USD ) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Core i7-720QM | SLBLY(B1) | 1.6 GHz | 1/1/6/9 | 4.0 | 4 × 256 KB | 6 MB | DMI | 12× | 2 × DDR3-1333 | 0.65–1.4V | 45 W | SocketG1 | September 2009 | BY80607002907AHBX80607I7720QM | $364 |
| Core i7-740QM | SLBQG(B1) | 1.73 GHz | 1/1/6/9 | 4.0 | 4 × 256 KB | 6 MB | DMI | 13× | 2 × DDR3-1333 | 0.65–1.4V | 45 W | Socket G1 | June 2010 | BY80607005259AABX80607I7740QM | $378 |
| Core i7-820QM | SLBLX(B1) | 1.73 GHz | 1/1/8/10 | 4.0 | 4 × 256 KB | 8 MB | DMI | 13× | 2 × DDR3-1333 | 0.65–1.4V | 45 W | Socket G1 | September 2009 | BY80607002904AK | $546 |
| Core i7-840QM | SLBMP(B1) | 1.87 GHz | 1/1/8/10 | 4.0 | 4 × 256 KB | 8 MB | DMI | 14× | 2 × DDR3-1333 | 0.65–1.4V | 45 W | Socket G1 | June 2010 | BY80607002901AIBX80607I7840QM | $568 |
| Core i7-920XM | SLBLW(B1) | 2 GHz | 2/2/8/9 | 4.0 | 4 × 256 KB | 8 MB | DMI | 15× | 2 × DDR3-1333 | 0.65–1.4V | 55 W | Socket G1 | September 2009 | BY80607002529AF | $1054 |
Question:
When by80607002529af is the part number and september 2009 is the release date what is the l2 cache?
Answer:
4 × 256 KB