Hi guys, lately I have been taking apart some old computers and now I want to upgrade one so if I sell it it will be even more attractive . I'm not sure what motherboard I have but I don't think that this is essential for this question. I want to mix 2*1 gb ram with 2, 1 gb of ram (so extra sticks, one of two and another one of 1). The 2*1 is currently in my computer and it works fine. The 2 and 1 gb stick of ram was in my old computer which also worked (psu broke).
Specs: 2*1 gb ram HYS64T128020U-3S-A 1GB 2Rx8 PC2-5300U-555-12-EO
Specs: 2, 1 gb of ram MT16HTF25664AY-667E1 200753 BZAE02D008, 1GB (same for the 2gb stick apart from the product number i believe before this) 1RX8 PC2-5300U-555-12-ZZ 1GB, DDR2, 667, CL5
When it comes to these detailed tech questions I am a total noob! Any help would be appreciated!