These guys get very similiar vRam usage numbers:
http://www.guru3d.com/articles_page..._graphics_performance_benchmark_review,9.html
It seems that over 4 GB of vRAm overhead (y) is the normal now. I find it fascinating that the amount of vRam / megapixel does not change much. It is always 0.1 to 0.2 GB/ megapixel, though
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Go all the way back to Crisis:
http://hardforum.com/showthread.php?t=1456645
defaultluser reports .31 GB@ .48 MP, .36GB@ .79 MP .45GB@ 1.31 MP
and .575 GB at 1.9 megapixels
using 1.9x + y = .575 and .48x + y = .310
.....using substitution....
x = .187 Still the same GB/ megapixel as today
y = .22 GB This was 4xAA btw.
Checking with .79 megapixels or 1024x768 .....
.79x + y = .368 compared to .36 GB that they recorded
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The most "efficient" (low y factor) modern game is Tomb Raider, which looks great.
Starting with 4k:
8.4x + y = 3.1 .... and now 1080p:
2.07x + y = 1.5 .... using subsitution,
8.4x + 1.5 - 2.07x = 3.1 ...reduce to x and
x=.253 or in other words .253 GB needed for each Megapixel (highest I have seen)
now we can solve for y:
2.07x + y = 1.5
y = 1.5 - 2.07x ....replace x with .253 and
y=.977 VERY NICE!
Now lets test with 1440p or 3.7 Megapixels which was said to use 1.94 GB
3.7x + y = 1.91 ---> pretty damn close!!
http://www.guru3d.com/articles_page..._graphics_performance_benchmark_review,9.html
It seems that over 4 GB of vRAm overhead (y) is the normal now. I find it fascinating that the amount of vRam / megapixel does not change much. It is always 0.1 to 0.2 GB/ megapixel, though
----------------------------------------------------------
Go all the way back to Crisis:
http://hardforum.com/showthread.php?t=1456645
defaultluser reports .31 GB@ .48 MP, .36GB@ .79 MP .45GB@ 1.31 MP
and .575 GB at 1.9 megapixels
using 1.9x + y = .575 and .48x + y = .310
.....using substitution....
x = .187 Still the same GB/ megapixel as today
y = .22 GB This was 4xAA btw.
Checking with .79 megapixels or 1024x768 .....
.79x + y = .368 compared to .36 GB that they recorded
---------------------------------------------------------------------
The most "efficient" (low y factor) modern game is Tomb Raider, which looks great.
Starting with 4k:
8.4x + y = 3.1 .... and now 1080p:
2.07x + y = 1.5 .... using subsitution,
8.4x + 1.5 - 2.07x = 3.1 ...reduce to x and
x=.253 or in other words .253 GB needed for each Megapixel (highest I have seen)
now we can solve for y:
2.07x + y = 1.5
y = 1.5 - 2.07x ....replace x with .253 and
y=.977 VERY NICE!
Now lets test with 1440p or 3.7 Megapixels which was said to use 1.94 GB
3.7x + y = 1.91 ---> pretty damn close!!