Hello there Vipermk2.
As per my rather indepth post in the thread, What affects FPS
linked below:- What affects fps?
There's a massive
gulf of performance between the GTX 560 Ti and the GT 640
which is reflected in the prices of those two cards respectively. Compare the specs of those two cards from NVIDIA's website:-
GT 640 specs:- GeForce GT 640 | Specifications | GeForce GTX 560 Ti specs:- GeForce GTX 560 Ti | Specifications | GeForce
(The portion below is partly quoted from my own previous post)
The influence each spec has on the relative performance of the card, sorted by greatest to lowest:-
The amount of Shaders/CUDA cores (as compared to the same family/generation of cards),
followed by the card's ROPs,
Shader/Processor/CUDA core clocks,
Memory Type (Dedicated, or Integrated) and Interface (64, 128, 256 and 384 bit) ,
Memory Speeds (clocks) and Generation (DDR3, GDDR3, GDDR5) and
finally, the Amount of Memory (512 MB - 3 GB).
When you compare the GTX 560 Ti
and GT 640
, you have to note
that the although 560 Ti (384)
has the same number of CUDA cores
as the GT 640 (384)
, and the same CUDA core clocks (~900Mhz)
, the next important spec, which is the memory interface and type greatly favours
the GTX 560 Ti (256 bit vs 128 bit, and GDDR5 vs DDR 3)
and results in the overwhelming performance advantage
that the GTX 560 Ti
will show in games, thus costing almost double
compared to the GT 640.
It is irrelevant
to compare the memory sizes
of the two cards, because although the GT 640
and the GTX 560 Ti
have 2 GB onboard
, the GTX 560 Ti's GDDR5
memory is running at a much greater speed
as compared to the GT 640's inferior DDR3
And to answer your question of whether the single GTX 560 would be superior to your current GTS 450 SLI solution, the performance would be about the same
, but the 560 Ti solution would be superior for games with poorly implemented SLI support GTS 450 SLI or 560 ti? - Nvidia - Graphic-Displays Whats better? GTS 450 sli or gtx 560 ti?
Hope that helps clear it up a little. Thanks for reading.