VGKitov :
You are right, at first glance I didn't notice. Nevertheless it realy is a cut down version, not buy much, but still. The only thing, that seems to be limited is the Memory Bandwidth, which is normal considering 192-bit bus. Correct me if I'm wrong.
Here are the differences between the Inno3D GTX 460 1mb vs. the MSI GTX 460 768mb Cyclone on an identical test system:
Inno3d
Core clock: 750 mhz
Memory clock: 3500 mhz
Full system power consumption: 372 watts
Load temp: 81c (Guru3d claims that a bios revision will bring this down)
Noise: 43Db
BFBC2 19x12: 37 fps
Dirt 2: 58 fps
Metro 2033: 18 fps
Crysis: 39 fps
3D Mark Vantage: 15,501
Overclocking: 851 mhz
CODMW4 w/OC: 99/111 w/OC
"The Inno3D GeForce GTX 460 with 1024MB is a lovely product. The baseline performance of this card is just really good as you'll receive a default overclock of the GPU at 750 MHz, The graphics memory was bumped up 200 MHz as well, and that gives this product a nice kick over the reference product alright. Of all the GTX 460 cards tested this one ranks and takes the 3rd place of them all.
There are a few remarks to be made though, the power consumption of this card was simple put high as well as the GPU heat levels. Both with measurements at such a level we are convinced we received a non-final product. E.g. Inno3D did rush out this card to us for a review, and we suspect that the GPU needs a little BIOS voltage tweaking. Knowing Inno3D I have every confidence this is fixed with the final retail products."
http://www.guru3d.com/article/inno3d-geforce-gtx-460-oc-review/1
MSI Cyclone
Core clock: 727 mhz
Memory clock: 3600 mhz
Full system power consumption: 297 watts
Load temp: 58c
Noise: 37Db
BFBC2 19x12: 34 fps
Dirt 2: 48 fps
Metro 2033: 14 fps
Crysis: 35 fps
3D Mark Vantage: 14,129
Overclocking: 927 mhz
CODMW4 w/OC: 87/114 w/OC
"The card is built MSI style, the military class components show (stronger, higher quality, better heat levels), a nice black PCB and of course the eye-catching Cyclone cooler, which works really well I might add, this card can not be heard even under full GPU stress. Especially when overclocking it shows more muscle compared to the reference design cooler."
"MSI GeForce GTX 460 768MB - Initially due to a delay, MSI could not send out their 1GB model in time for this article. Instead they sent out the 768MB version in the Cyclone cooler flavor. Armed with a nice PCB, quality components and that cooler we feel that the 768MB version, despite lacking 8 ROPs and 256MB over the 1GB model, holds ground really well. A product like this will cost roughly 210 USD, and you gain an absolutely silent yet quite nicely performing DX11 class graphics card. Though it lacks a little bit of extra bite over the 1GB models, we certainly feel that the card offers great value for money. Oh and hey... the default higher clock frequency certainly helps out as well. Being MSI you get to overclock with AfterBurner and it brings voltage control of the GPU as a feature. We took this card to well over 900 MHz on the core."
http://www.guru3d.com/article/geforce-gtx-460-review/3