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I never used to believe in V-RAM ocing until just now

3t3P

3t3P

3t3P

Soldato
Joined
20 Dec 2006
Posts
3,760
So i'm wringing my system dry trying to wait for Maxwell and thought hey i'll OC my video memory see what happens.

On all past cards i've noticed negligable performance increase, sometimes 1FPS and so I didn't bother.

I used the Tombraider (2013) benchmark and it's the 3D results that are staggering as I got a 30% improvement in minimum frames here (the important one, right)

2D 1080p:
Mem speed in MHz
Numbers in frames per second

1650 (stock)
Min 114.8
Max 208.2
Avg 156.6

1700
Min 120.6
Max 208
Avg 159.3

1750
Min 122.6
Max 208.2
Avg 159.3

1800
Min 122.3
Max 212.1
Avg 160.4

3D 1080p:

1650
Run 1
Min 44.7
Max 62.3
Avg 59.5

Run 2
Min 40.8
Max 62.3
Avg 59.5

1800
Run 1
Min 58.0
Max 62
Avg 60.0

Run 2
Min 58.0
Max 62.3
Avg 60.0

Maybe this is all obvious to people but like I said I was never a believer.
When bandwidth counts it really seems to help.

It added 50 to my Heaven 4.0 score giving me 1104 which puts me in line with single GTX 680 and 770 cards so pretty chuffed now.

Also what's weird is that in Tombraider 2D I drew the most power and actually broke my record of 630W (Crysis 3) and got a peak of 700W from the wall!
In 3D mode It was 90-100W less?

I'll leave e'm at 850/1800 and see how they fare in day-to day use:cool:
 
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From my experience - tho never tested with 3D - as a gross generalisation you needed 850MHz minimum on the core before VRAM was at all a bottleneck on the 470s in the majority of cases. Below 850 core and any gains from higher VRAM speeds dropped off very quickly.
 
So it is coincidence that frames stabilized at about 60fps at 3d. I am just surprised, how much impact enabling 3d has on performance. From 156fps to 59 fps is a reduction to about 38%:eek:
 
texxx74 said:
So it is coincidence that frames stabilized at about 60fps at 3d. I am just surprised, how much impact enabling 3d has on performance. From 156fps to 59 fps is a reduction to about 38%:eek:
Click to expand...

It's more ! going from 156 to 59 FPS is a 97 FPS loss... about 62% loss.
 
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So basically You figured out what have been known for years. That OC of Video memory gives FPS. IMPOSSIBLE :D
 
well yeh:) but my previous observations of three different graphics cards never gave me statistically significant improvement until now.
 
Could be that for those cards the gpu core's grunt was a strong bottleneck, in which case clocking the ram would make an imperceptible difference.
 
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