Difference Between DDR3 And GDDR3 ?

I was searching and found that some cards are DDR3 and some are GDDR3 , so whats the difference ?

for example out of these which version is better ?

Sapphire Radeon HD 7790 1GB DDR5 DL-DVI-I/DL-DVI-D/HDMI/DP PCI-Express Graphics Card 11210-00-20G

http://www.amazon.com/gp/product/B00BWHIOVW/ref=s9_psimh_gw_p147_d0_i1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=1K6674VCEPMPRDYGA76F&pf_rd_t=101&pf_rd_p=1630083462&pf_rd_i=507846

ASUS HD7790-DC2OC-1GD5 Radeon HD7790 1GB GDDR5 128-bit, DVI-I/DVI-D/ HDMI/DP PCI-Express 3.0 CrossFire ready Graphic Card OC-selected 1075MHz core

http://www.amazon.com/gp/product/B00BZCXZ0E/ref=s9_psimh_gw_p147_d0_i3?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=1K6674VCEPMPRDYGA76F&pf_rd_t=101&pf_rd_p=1630083462&pf_rd_i=507846

GDDR3 is built more towards graphics while DDR3 is not. GGDDR uses more power than DDR, so if power is your concern then you should choose DDR. What really matters is the number at the end.

Power in what sense ? You mean PSU ?

Power in regards to your entire system.

I will go for whats best for performance out of two .

Then GDDR3 is the one.

Those are both GDDR5? Wut?

Ok so basically all graphics cards are mostly GDDR5 or they are super low end and use system memory (DDR3)

You want to know whether DDR3 (system memory) or GDDR3 (super out of date Graphics card memory) is better

The cards you listed say DDR5 (typo no doubt) and GDDR5

Confused anyone?

Both cards have exactly the same type of memory...both 1gb of GDDR5

they're both GDDR5