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460M has more VRAM than Standard GTX460's? - Page 2

post #11 of 18
Quote:
Originally Posted by Qosmio View Post
The odd thing I noticed about the 460M on my machine is that regardless of the game, I hardly use more than 400MB worth of the Vram that's provided. Crysis was the only game that went up to 450MB. Is this due to the 1680x945 resolution that it's set at rather than 1920x1080?

I just don't see how 1.5GB is needed for a card like this. Though I suppose it does help a bit when you have two cards in SLI for any laptop.

The image provided clearly shows the amount of Vram dedicated to the card only. I have mine overclocked a fair amount. By the way, the 460M is what we had expected out of the GTS 450.
It's probably that and the card just can't use that much ram due to the 192-bit bus and low number of CUDA cores.

I'm guessing the large amount of VRAM is for the marketing people to help them sell more laptops and pitch them as "gaming" laptops.
post #12 of 18
192 Cores is by no means a low number. And the 5770 has a 128-bit bus with a 1GB framebuffer. If a 1GB framebuffer is to a 128-bit bus then a 1.5GB framebuffer is to a 192-bit bus.
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post #13 of 18
Quote:
Originally Posted by lonewolf371 View Post
It's probably that and the card just can't use that much ram due to the 192-bit bus and low number of CUDA cores.
VRAM usage doesn't really work that way. It's predicated almost entirely by the resolution, level of AA, and the resolution of the textures the game implements. If you don't have a powerful 'supporting cast' (i.e. lower bandwidth or cuda cores) what will happen is the FPS will be low, but the actually memory usage shouldn't really be affected by that.

Quote:
Originally Posted by Qosmio View Post
192 Cores is by no means a low number. And the 5770 has a 128-bit bus with a 1GB framebuffer. If a 1GB framebuffer is to a 128-bit bus then a 1.5GB framebuffer is to a 192-bit bus.
True. And the reason the vram usage is so low (from your other post) is almost certainly the resolution, which is by far the most determinative factor for vram usage.
    
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post #14 of 18
I believe the key word is : 3D. Nvidia has positioned its higher end mobile GPUs as ''3D Vision'' and/or ''3DTV Play'' capable. Enabling 3D would cut the framerate by at least 50-60% as the amount of rendering is doubled. So, 1.5GB is 'effectively' 725MB?!

Now, back to the topic:
I speculate Nvidia thinks there are more people who use his/her laptop to play 3D games and watch 3D blu-ray movies than use the desktop platform. So, the 460M has more Vram than a 460.

Perhaps we can ask MSIAlex?
post #15 of 18
It's for marketing. People don't know how to buy video cards. When they look at specifications, more is assumed to be better. Such a person might think a 2 GB video card is twice as fast as a 1 GB video card. This seems nonsensical to the informed buyer, but that is simply hindsight bias. You have to take into consideration that most people know almost nothing when buying computers.
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post #16 of 18
Quote:
Originally Posted by windfire View Post
I believe the key word is : 3D. Nvidia has positioned its higher end mobile GPUs as ''3D Vision'' and/or ''3DTV Play'' capable. Enabling 3D would cut the framerate by at least 50-60% as the amount of rendering is doubled. So, 1.5GB is 'effectively' 725MB?!

Now, back to the topic:
I speculate Nvidia thinks there are more people who use his/her laptop to play 3D games and watch 3D blu-ray movies than use the desktop platform. So, the 460M has more Vram than a 460.

Perhaps we can ask MSIAlex?

3d vision doesn't use more vram than non 3d. Basically, each eye gets every other frame, hence your frame rate is effectively halved. That being said, that doesn't require or benefit from additional vram, it simply takes processing power. The only things that really effect vram use is texture size, resolution, and AA.
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post #17 of 18
Quote:
Originally Posted by Qosmio View Post
The odd thing I noticed about the 460M on my machine is that regardless of the game, I hardly use more than 400MB worth of the Vram that's provided. Crysis was the only game that went up to 450MB. Is this due to the 1680x945 resolution that it's set at rather than 1920x1080?

I just don't see how 1.5GB is needed for a card like this. Though I suppose it does help a bit when you have two cards in SLI for any laptop.

The image provided clearly shows the amount of Vram dedicated to the card only. I have mine overclocked a fair amount. By the way, the 460M is what we had expected out of the GTS 450.
The 460M at that clock gets out performed by a 720MHz GTX460, hell maybe even stock. Also, yes, it's due to lower Res.
    
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post #18 of 18
Quote:
Originally Posted by aldfig0 View Post
It's for marketing. People don't know how to buy video cards. When they look at specifications, more is assumed to be better. Such a person might think a 2 GB video card is twice as fast as a 1 GB video card. This seems nonsensical to the informed buyer, but that is simply hindsight bias. You have to take into consideration that most people know almost nothing when buying computers.
^This

Where I'm from I hear publicity on the radio and read brochures from stores about laptops with 1GB of RAM (ooohhhh), super cheap laptops. And then you go read what the GPU is and it's some entry level card, designed to play blue-ray and play the occasional game / casual games.

The GTX460 I have is just about right qith 1GB of VRAM. GTA IV, which is one of the few games that can use beyond 1GB of VRAM, is playing at 1280x800 on my system, with a 900Mb+ VRAM usage. I don't put it near it's limit because the card itself is already on the limit - I get a max of around 36-38 fps, with dips going into the 20's sometimes.

Only something with the horsepower of a GTX560ti or a GTX470 has the power to take advantage of more than 1GB of VRAM.

A GTX460m has nowhere the ability to take advantage of 1.5GB of VRAM. It's the same as 1GB of RAM. Even more so for a laptop. It doesn't even have the horsepower to unleash the 1gb of VRAM in general. It does becomes useful however to set higher levels of AA.
 
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