7950 Overclocking = worse frame rates?

C

Citizen _insane

Gawd
Joined
May 2, 2006
Messages
565
I'm confused here. I was able to stably reach 1075/1475 on my Sapphire 7950 but for some reason after overclocking I'm getting worse results in benchmarking software and games.

Asrock z77 Extreme 4
2500K @ 4.2Ghz
16gb Samsung low profile
Win7 x64

After applying my overclock in MSI Afterburner I stressed and benched in Heaven 4.0 at various settings and saw pretty poor performance. As I increased my GPU clock, results got worse. On the extreme preset I believe I was getting a score of ~650 @ 1075MHz and ~550 @ 1100MHz (+25mV). Temps peaked at about 66*C and stayed there, nothing looked to be a cause of concern. All clocks and voltages verified using CPU-Z, GPU-Z and HWMonitor.

Also confirmed in the BF4 Beta. Frames dropped to mid 30's with overclock. While still in the game I reclocked the card to factory settings and my frames immediately jumped up to mid 50's.

Any ideas?
 
i don't own a 7950 but from what i've gathered here is your memory is most likely oced too high.. you will get worse performance because the error correction for the memory will kick in.. try just your core overclock and see if you get a boost..
 
H-street said:
i don't own a 7950 but from what i've gathered here is your memory is most likely oced too high.. you will get worse performance because the error correction for the memory will kick in.. try just your core overclock and see if you get a boost..
Click to expand...

Will try that thanks. I also realized this is in the wrong section. If a mod sees this please move to the AMD subforum, sorry!

Edit: Tried this and it worked. Should have tried that in the first place.
 
Last edited:
On my 7950's I've been running stable at 1125/1425. If I push the memory to 1475 my scores go down. In crossfire anyway. I was able to run higher clocks on a single card. Like 1175/1575 which netted me P10169 in 3dmark11. I'm pretty happy where I'm at now though. P15360 in 3dmark11 and 6373 in Fire Strike extreme using crossfire.
 
Hope your not talking gpu score. Mine at 1025/1500 score me 19,400 in 3dmark11 for gpu. Was low around high 17,000 before 13.11 betas. But your still low. AMD cpu ? You must be talking overall score.
 
Last edited:
That's why I put the "P" in front of the score. It's the overall score. My graphics score alone was 21,090 in 3dmark11 and 7380 in Fire Strike extreme. This seems pretty on par with what everybody else is getting in a 7950 crossfire setup. I'm also not using the beta drivers. I'm using the 13.9 which actually lowers my score a bit comparatively.

I'm running a 4670k @ 4.4ghz.

http://www.3dmark.com/3dm11/7279467

http://www.3dmark.com/fs/956910
 
Well thats BS. Must be the pcie 3.0 gives you a little boost in 3dmark11. Took 1150/1500 to score about same as you.
1150/1500
http://www.3dmark.com/3dm11/7316102
1125/1425
http://www.3dmark.com/3dm11/7316083
By no means was it a fresh boot. Actually after about 3 hours of playing bf4, weird my cpu is faster but your graphics score is higher. Probably the drivers actually now that I think about it.
Was that firestrike score at 1440p or 1600p ?
This is mine at 1080p and 1125/1500
http://www.3dmark.com/fs/994103
 
Last edited:
The Fire Strike link I posted above is the "extreme" version, which I think is 1080p. When I do the regular version like you I end up with:

http://www.3dmark.com/fs/956882

You have a quad core w/hyperthreading clocked at 4.7ghz, so I think it's safe to say that you kill me in cpu, even if yours is older. None of mine were fresh boots either. I've never really thought about doing that, lol.
 
Weird how I beat u in fire strike by about 500 points, but in 3dmark11 you beat about by about 500 points when I use same clocks as you :p GPU wise I mean.
 
Yeah, it's fun to compare. We have similar but different rigs. They score pretty close to one another.

I added the specs of mine to my sig.
 
You must log in or register to reply here.
Back
Top