What to choose? GDDR3 or GDDR5 Memory?

[sam94m3r]

I know a GDDR5 memory is usually faster than GDDR3, it improves memory bandwidth.

BUT

Does GDDR3 & GDDR5 Memory have anything to do with the pixel/texture units?
IMO, a higher pixel/texture fillrate with GDDR3 would out perform a lower fillrate equipped with GDDR5, am I right?

=>Example: A 7730M GDDR3 is better than 6770M GDDR5 in benchmarks.

I think,
Pixel fillrate used for - render pixels (resolution & anti-alising)
Texture fillrate used for - rendering textures (anisotropic filtering, etc)

& tell me which has better performance in games, HD 7730 or GT 640 both GDDR3?
Suggest any recommended laptops with similar GPUs.


PS: I am not comparing specs for AMD vs. NVIDIA or vice versa, because they seems to have different architectures, I only check relative benchmarks.

---------------------------
Lenovo Y560 Laptop

Windows 8 Pro 64bit
Core i5-460m
Radeon HD 5730m + IntelHD 1000
4GB DDR3-1333MHz

 

[the great randini]

a good site for checking mobile benchmarks is http://www.notebookcheck.net/Mobile-Graphics-Cards-Benchmark-List.844.0.html
i think you are mistaken about the 7730m with ddr3, it is newer than the 6770m cant see why it would use older memory.

 

[sam94m3r]

I already checked that before
'Notebookcheck' benchmark shows HD 6770m is below HD 7730m
they use older memory because of power comsumption & low heat

 

[Simu]

but i always recommend a GDDR5 version bcoz its 2X the GDDR3.

power consumption and heat depends on the manufacturing process.

 

[determinologyz]

I know a GDDR5 memory is usually faster than GDDR3, it improves memory bandwidth.

BUT

Does GDDR3 & GDDR5 Memory have anything to do with the pixel/texture units?
IMO, a higher pixel/texture fillrate with GDDR3 would out perform a lower fillrate equipped with GDDR5, am I right?

=>Example: A 7730M GDDR3 is better than 6770M GDDR5 in benchmarks.

I think,
Pixel fillrate used for - render pixels (resolution & anti-alising)
Texture fillrate used for - rendering textures (anisotropic filtering, etc)

& tell me which has better performance in games, HD 7730 or GT 640 both GDDR3?
Suggest any recommended laptops with similar GPUs.


PS: I am not comparing specs for AMD vs. NVIDIA or vice versa, because they seems to have different architectures, I only check relative benchmarks.

---------------------------
Lenovo Y560 Laptop

Windows 8 Pro 64bit
Core i5-460m
Radeon HD 5730m + IntelHD 1000
4GB DDR3-1333MHz

GDDR5 is quad pumped and GDDR3 is double pumped..BEST to go GDDR5