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looking for better graphics cards

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  • Graphics
  • Graphics Cards
  • Memory
Last response: in Graphics & Displays
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August 29, 2014 2:43:47 AM

Is gt840m 4gb better than gt840m 2gb? As there is more memory for 4gb....

More about : graphics cards

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a c 83 U Graphics card
a b } Memory
August 29, 2014 3:01:28 AM

Hey again.

http://www.tomshardware.com/answers/id-1834045/2gb-4gb-...

Check this out.
Vram is a buffer for data for the most part. When the gpu pulls data from vram, its very fast. When the gpu has to pull data and its not in the vram, it has to pull it from other sources such as ram or haven forbid the HD. When this happens, you get a sudden drop in FPS, but the avg is only slightly effected. The article you posted was not measuring the min frames. Look at a TH benchmark, and they include min frames. A card can output 60fps and another card can out put 59fps. If the 60 fps card puts out 120 frames for 1 second, and 0 for the next it has 60fps. A card that puts out 59fps every 1 sec beats the 60fps avg card.

Look at other reviews where vram was not enough, and you will see this very thing happen. 1 second will be say 120fps and the next it will be 20, then back up to 120. Then, they take the same card, but with more vram, and that drop goes from 20 to 80. Vram in this case makes the gameplay much smoother.

Think of it like this. If you have a super slow cpu, and 16gigs of ram, and you try to convert a large video file, the ram does next to nothing because the cpu is too slow. If you have a super fast cpu, and 1gig of ram, and try to convert a large video file, the ram cant hold all the data, and the cpu has to pull the data from the HD. There is a balance between amount of vram, and gpu chip speed. If the gpu is not capable of processing what is going on because its slow or old, vram wont do much.
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