PC2-5300

NOTE! As PC2-5300 is getting increasingly difficult to acquire, PC2-6400 can be used instead. Using PC2-6400 may or may not increase the performance of your model, as some models may underclock it to their respective original DRAM speeds. PC2-5300 This is DDR2 SDRAM at 667 MT/s in a 200-pin SO-DIMM form-factor. DDR2-667 may also be interchangeably referred to as PC2-5300.

Available DRAM modules from Lenovo

DDR2 type	Individual / Single-Pack Option Marketing Part Number	25-Pack Option Marketing Part Number	Field Replacement Unit (FRU) Service Part Number
Non-ECC, unbuffered 2Rx16 256MB PC2-5300 CL5	40Y7732	N/A	40Y8401
Non-ECC, unbuffered 2Rx16 512MB PC2-5300 CL5	40Y7733	N/A	40Y8402
Non-ECC, unbuffered 2Rx16 1GB PC2-5300 CL5	40Y7734	51J0502	40Y8403
Non-ECC, unbuffered 2Rx8 2GB PC2-5300 CL5	40Y7735	51J0548	40Y8404

Taken from Lenovo, Memory compatibility - Notebooks.

Models that support this technology

Models	Soldered on motherboard	SO-DIMM Slot 1	SO-DIMM Slot 2	Official Max-Memory	Unofficial Max-Memory
T61, T61p	N/A	Occupied	Depends	4GB	8GB3
T60, T60p	N/A	Occupied	Depends	3GB1 2	3GB1 2
X300	N/A	Occupied	Depends	4GB	8GB3
X61, X61s, X61 Tablet	N/A	Occupied	Depends	4GB	8GB3
X60, X60s, X60 Tablet	N/A	Occupied	Depends	3GB1 2	3GB1 2
SL300, SL400, SL500	N/A	Occupied	Depends	4GB	8GB3
SL400c, SL500c	N/A	Occupied	Depends	4GB	8GB3
R61, R61i, R61e	N/A	Occupied	Depends	4GB	8GB3
R60, R60i, R60e	N/A	Occupied	Depends	3GB1 2	3GB1 2
G50	N/A	Occupied	Depends	3GB1 2	3GB1 2
Z61t, Z61e, Z61m, Z61p	N/A	Occupied	Depends	3GB1 2	3GB1 2

FOOTNOTES [Δ]

1. Attained via two 2Rx8 2GB DDR2 non-ECC SO-UDIMMs, may or may not be possible with 1Rx8 2GB DDR2 non-ECC SO-UDIMMs.
2. The actual amount of usable memory will be lower than 4GB, due to the 32-bit limitation of the i945 series chipsets. Depending on the amount of I/O space required by certain devices, the amount of usable DRAM may be as low as 3.75GB to 3GB.
3. Attained via two 2Rx8 4GB DDR2 non-ECC SO-UDIMMs, not possible with 1Rx8 4GB DDR2 non-ECC SO-UDIMMs. (if they do exist)

Available DRAM modules from other companies

Manufacturer	Partnumber	Description	Tested on model
Crucial	CT2KIT12864AC667	2x1 GB	R60e (0657-3LG1)
Crucial	CT25664AC667	2 GB	T60 (1951-A47)
Crucial	CT2KIT6464AC667	2x512 MB
Crucial	CT12864AC667	1 GB
Crucial	CT6464AC667	512 MB
Crucial Rendition	RM12864AC6674	1 GB	T60 (2007-49G)
Transcend	TS2GIB3847	2 GB	R60 X41
G.Skill	F2-5400PHU1-1GBSA	1 GB	T60p (2007-93G2)
Corsair	VS1GSDS667D2	1 GB	Z61m
Corsair	VS2GSDS667D2	2 GB	T60 (2007-FSG) Z61m X60 (1707-V28)
Corsair	VS4GSDSKIT667D2	2x2 GB5	R60 (9456-HTG)
G.Skill	F2-5300CL5S-2GBSA3	2 GB

FOOTNOTES [Δ]

1. The memory module that was shipped with this laptop had the same Micron logo as the modules from Crucial, which is a division of that company.
2. Memory for T60p spec is CL5, but this module which was CL4 works fine. The product page at G.Skill describes it wrongly as a CL5 module.
3. Some users reported the RAM module is in fact overclocked from 533MHz to 677MHz, hence some systems may report 533MHz and/or CL4.
4. Crucial's website doesn't list Rendition memory, but the memory is clearly labelled as Crucial Rendition by several resellers.
5. The actual amount of usable memory will be lower than 4GB, due to the 32-bit limitation of the i945 series chipsets. Depending on the amount of I/O space required by certain devices, the amount of usable DRAM may be as low as 3.75GB to 3GB.