purple stain :
The 7750 is faster than the GT440.And even cheaper.
do u mean Asus - AMD Radeon HD 7750 1GB GDDR5.....
if u mean that and i really dont understand this alot, but
Asus - AMD Radeon HD 7750 1GB GDDR5:
Memory Clock 4600MHz
AND
Asus - NVIDIA GeForce GT 440 1GB GDDR5 :
Memory Clock 3200MHz....
But for real i compared 7750 is really better than gt440 but for real both are really almost the same!!
And also
Asus - NVIDIA GeForce GT 440 1GB GDDR5 :Reg. Price: $97.99
Asus - AMD Radeon HD 7750 1GB GDDR5 : Reg. Price: $112.99