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460M has more VRAM than Standard GTX460's?

post #1 of 18
Thread Starter 
Why does the mobile version of the 460 have 1.5GB of VRAM as opposed to the GTX460 with 1GB? Am I wrong in saying a desktop would benefit more from this?
http://www.canadacomputers.com/bundl...ndle_id=036058
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post #2 of 18
I think it is counting the dedicated memory as well as the shared system RAM that can be used. Actual dedicated RAM is likely much less.
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post #3 of 18
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post #4 of 18
Ram amount does not automatically = better performance. For example, if you take a weak gpu such as a 8500gs that has 1 gig of memory versus a 8800gtx, the 8800gtx will annihilate the 8500gs even though it has less ram (768mb). The 8800gtx has more power (higher cuda cores, more bandwidth, etc.). If a gpu is weak, it cannot take advantage of a lot of memory and is just marketing to make it look like the card is stronger than it actually is.

Also, laptop versions gpus are always stripped down versions of the desktop versions. They have less cuda cores, bandwidth, fill rates, etc. The desktop versions are always more powerful, and are cheaper. The gtx 460m is definitely not a weak gpu. It could probably take advantage of most of the increased memory. Just remember that it still is slower than a regular gtx 460 because it is stripped down.
Edited by Brian123 - 1/24/11 at 7:16pm
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post #5 of 18
GTX 460M has a 192-bit memory bus. Half the CUDA cores. About 2/3rds the memory clock speed. Half the overall memory bandwidth.

They're not really comparable.
post #6 of 18
The OP is asking why the M has higher VRAM than the desktop version. I think I agree with him that the desktop version would benefit from having more VRAM because of higher resolutions.
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post #7 of 18
imo laptops don't need 1.5gb of vram.
Who the hell uses 1.5gb of vram on a laptop?
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post #8 of 18
Thread Starter 
Quote:
Originally Posted by Clock for Clock View Post
The OP is asking why the M has higher VRAM than the desktop version. I think I agree with him that the desktop version would benefit from having more VRAM because of higher resolutions.
This is what I meant. You're less likely to multi-monitor a laptop and thus don't necessarily need the extra memory.
You're all saying the desktop versions are obviously more powerful & I know that - I wasn't born yesterday. What I'm asking is, if the desktop versions are more powerful, wouldn't they benefit more from the extra memory & why the mobile version has it?
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post #9 of 18
Quote:
Originally Posted by Dirtyworks View Post
This is what I meant. You're less likely to multi-monitor a laptop and thus don't necessarily need the extra memory.
You're all saying the desktop versions are obviously more powerful & I know that - I wasn't born yesterday. What I'm asking is, if the desktop versions are more powerful, wouldn't they benefit more from the extra memory & why the mobile version has it?
Damn good question, laptops arent known for their ability to max metro, and i doubt youll eyefinity or 3D vision anytime soon one m, so why not give us 1.5gb memory on the 460? Simple, money. The only 4xx series card to have 1.5 is the 480, some people like more ram but dont nesscecerialy need the extra performance from the 480, but buy it anyway because they run big res. Money = all companies care about.
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post #10 of 18
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.

Edited by Qosmio - 1/24/11 at 9:05pm
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