Phoenix miner too is now working with 4GB (similar to lolminer) I run it on linux with my old 4GB cards.
no it isn't on windows. Out of memory, 4.02 gbytes allocation...
In Windows lolMiner is working, and you have the bat file to use It... The speed each Epoch will get reduced in All miners but you are still able to mine ETH with 4Gb in Windows