Overclocking causing lower benchmarks

akilleazy · 1 Dec 2014 at 22:02

Just curious if anyone else has the issue where they get to the point their gpu overclock is too high? I can push my gpu to 1280/1550 without really trying but it seems to work best at 1170/1510

Everything over seems to negatively effect performance in things like benchmarks and games

I know some people will say its unstable but trust me it isn't! Even overvolting has no effect

P4Clock · 1 Dec 2014 at 22:09

akilleazy said:
will say its unstable but trust me it isn't! Even overvolting has no effect

so it is unstable if voltage will not fix it then its just past the max your card can do?

or your maxing temps and the card is throttling

akilleazy · 1 Dec 2014 at 22:29

is there such a thing as being past the max? i'm a little inexperienced in gpu overclocking.. with cpu's i know you get diminishing returns once you're over a certain point but it never just wrecks performance the higher you go if its stable

hadn't considered temps! benching got it up to about 70 degrees but i wouldn't really consider that too warm :/

PrivateXTC · 2 Dec 2014 at 06:04

It's unstable, your volts aren't powering it enough

postmanfw · 2 Dec 2014 at 09:14

EEC memory on the ram?

Have that on 6950s and if you push to far error checking kicks in ,no artifacts but scores drop.

Core was different though....that would cause crash/artifacts if pushed too far.

P4Clock · 2 Dec 2014 at 09:24

Download an unlocked copy of msi afterburner so you can give it more juice

JonSmith · 5 Dec 2014 at 11:29

Two things to consider with RAM overclocking on a GPU:

1) They employ ECC technology. This will attempt to correct errors on the memory chip (in this case caused by OC instability). Sometimes it will be able to keep up and prevent a crash but you will get degraded performance

2) The VBIOS will automatically adjust the GDDR5 memory timings according to a frequency table. As an example with my HD 7850 my score is lower going from 1250 to 1251 mhz as the timings are loosened when going past this speed. Same at 1376, 1501, etc. I run my RAM at 1375 as a result of this.

kimandsally · 11 Dec 2014 at 06:38

JonSmith said:
Two things to consider with RAM overclocking on a GPU:

1) They employ ECC technology. This will attempt to correct errors on the memory chip (in this case caused by OC instability). Sometimes it will be able to keep up and prevent a crash but you will get degraded performance

2) The VBIOS will automatically adjust the GDDR5 memory timings according to a frequency table. As an example with my HD 7850 my score is lower going from 1250 to 1251 mhz as the timings are loosened when going past this speed. Same at 1376, 1501, etc. I run my RAM at 1375 as a result of this.

Very interesting thank you.