i have intel dh55tc mobo and win 7 64 bit. Earlier I had 2x2gb ram (same model, dual channel) but now one of the ram stick got faulty and am left with just 2gb ram. i can't find the same ram model to replace the faulty one and also i'm thinking of upgrading to 6gb ram. so should i go for 2gb(old)+2x2gb (new)ram configuration or a 2gb(old)+1x4gb(new)?
Your board does not support Tri-channel memmory - so it will me 2x2 GB or 2x4 GB or 2x8 GB