Can i use a PC2 5300 in place of a PC4200 Ram chip?

[Drew125]

Basically i am trying to find a ram chip for an older computer. The manual calls for a PC4200 ddr2. I cannot find one without going to amazon or newegg. I found a PC2 5300 at staples. Its a faster ram chip than the manual calls for.Will this chip work? BTW the staples page says universal laptop memory

http://www.staples.com/PNY-1GB-1-x-1GB-DDR2-200-Pin-SO-DIMM-DDR2-667-PC2-5300-Universal-Laptop-Memory/product_664369

 

[thx1138v2]

If you are replacing the PC 4200 with the PC2 5300 it should work. If you are trying to run both of them together it may or may not work. There's really no way to know without trying it.