Two middle-range GPUs. The older GT 650M which still available and the newer GT 740M which we start to see here and there. Currently, the available version of the 740M is the DDR3 variant. Nvidia does this to differentiate their GPUs and provide different performance levels and make a lot more money.
Lets start, as always, with a table
|Model||Core, shaders (vertex / geometry / pixel)||Memory||Core speed|
|GT 650M GDDR5||Kepler (GK107), 384 unified : 32 : 16, 28nm process||GDDR5@1GHZ (4GHZ effective)||735MHZ - 800MHZ/850MHZ (boost)|
|GT 650M DDR3||Kepler (GK107), 384 unified : 32 : 16, 28nm process||DDR3@0.9GHZ (1.8GHZ effective)||850MHZ - 950MHZ (boost)|
|GT 740M DDR3||Kepler (GK107), 384 unified : 32 : 16, 28nm process||DDR3@0.9GHZ||810MHZ-900MHZ(boost)|
|GT 750M||Kepler (GK107), 384 unified : 32 : 16, 28nm process||GDDR5@1.25GHZ||940MHZ - 970MHZ (boost)|
Yes, they are all the same chips more or less. The GT 740M is an underclocked GT 650M DDR3 in practice. So, we actually know what will be the performance more or less – I don’t think there will be no surprises.
|Game||Settings||GT 650M DDR3||GT 740M DDR3||GT 650M GDDR5|
|Dead Space 3||1920x1080 Ultra Preset 16xAF 4xAA||41-42||38-39|
|Tomb Rider||720p, high settings, 8xAF, FXAA||37-38||32-35||43-44|
|Bioshock Infinite||1920x1080, ultra settings, DDOF||16||12||18-19|
|Bioshock Infinite||720p, high settings||45||41-42||51-52|
|Assassins Creed III||1920x1080 very high||12||15|
|Battlefield 3||1920x1080, ultra, 16xAF, 4xAA||12||12||15-16|
Data is based onthe NBC GT 650M and GT 740M benchmarks, which as always include many laptops that throttle. I tried to pick only results that look right, avoiding throttling and drivers performance hits.
What we see is that the GT 740M is about the same level of the GT 650M DDR3. Optimally, it should be almost as fast or as fast, since they have exactly the same specs minus the sometimes 50MHZ advantage of the GT 650M DDR3. We also see that the GDDR5 version has an advantage although having lower core clocks.
You should recommend GT 740M equipped laptops as a function of the complete pros and cons picture of the laptop you want to buy and considering the price. For a price range of around 750$-800$ and up, I’d strongly suggest trying to find some other laptop you like, for example, the Sager options, the Lenovo Y410p or Y500 I5 SLI version.
Below that the GT 740M should be a very competitive GPU. Moreover, sometimes you’ll see some laptop that is perfect for you, like the Sony Vaio Fit 14E/15E which can be equipped with a GT 740M and 1080p screen for around 650$-700$ which is very competitive.
I’d suggest what I’m suggesting for the last week – wait at least another week or two to see what comes in our way. Many nice new models coming out now and it’s better to decide when there are more reviews to judge by.