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post #2301 of 4099
Ooh that sounds like a challenge! biggrin.gif
   
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post #2302 of 4099
Quote:
Originally Posted by toastiro View Post

Actually I have seen the most performance gain from overclocking the memory past 1250 so you are wrong.
My memory is gaming stable at 5500

for 3dmark 5800 nets the best graphic score.
5900 is benchable but the error checking drags the graphic score down VERY slightly ... no performance gain at all
6000 = hello grey stripes


this memory thing should be different across different chips
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post #2303 of 4099
Quote:
Originally Posted by ValSidalv21 View Post

Unstable memory OC, I had that when pushing for 1400+ on the memory. It looked stable when testing with 3DMark11 and Unigine, but it would give me the vertical lines while playing LA Noire. Lowering the memory OC to 1375 fixed that, but I later find out that 1350 gives me better bench scores so now I stick to that.

Good to know. Come to think of it NS2 is the most demanding game that I've thrown at it. I set my vram OC down to 1350. Hopefully it will be smooth sailing from here on out. Thanks for the help out! thumb.gif
Quote:
Originally Posted by kmac20 View Post

Once again I am going to suggest very strongly that you drop those memory clocks down to around 1250. You will get the same (within 10 or so points), if not better, 3d mark scores.
Me and another member have tested this somewhat and confirmed. ~1250 is the peak performance. You will get worse performance around 1300, and get identical performance at around 1350 as the speed increases fast enough to offset memory checking. But thats all it is, an offset. The same performance can be had for a much lower clock with much more stability.
You guys are only adding instability for virtually no gains.

If you guys don't believe me, leave your core clock the same, and do 3dMark runs at: 1200, 1250, 1275, 1300, 1350. I promise that afterwards you'll realize its a waste to set memory higher than what I mentioned.

That's pretty interesting. I'll have to see if NS2 has a benchmarking tool to see if going down to 1250 makes any difference.
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post #2304 of 4099
Quote:
Originally Posted by toastiro View Post

Actually I have seen the most performance gain from overclocking the memory past 1250 so you are wrong.

I promise you i'm not. Also just for clarity's sake: a gain of 20 points in 3dmark is not the "most performance gain". Its effectively identical to the lower clock.

What this means is you achieve virtually the same performance, for a lower clock. Less instability, less issues. If you try these things out I promise you'll see what I"m talking about. Leave core at the same speed, and check it going up from 1250 in increments of 10. At around 1270-1280 you'll see a large drop, and then by 1350 it will be back to pre-drop level.

Once again if this is the case for you, why bother with the higher memory clocks? Again another member (Roadkill95) and myself have both independently verified this. in addition to the original member who informed me of this. If your card doesn't do that thats cool, but I am 99% sure it does, and quite frankly I wont believe you until you show me benchmarks of all those speeds.

~1250 will be the same as high numbers is my point. Maybe a 20 point difference at WORST. We should all know 20 points in 3dMark aint crap. You could run identical settings twice and get a difference of 20 points. I also say around 1250 because mines like 1255 and roadkills was around 1260.

I also doubt very much that coincidentally 3 of us achieved the same results on 7850s....As far as I know it shouldn't be different across different chips, because it has to do with memory error checking on all 7850s.

Look just try it out krabs. drop your clocks down to around 1250 and see how big of a difference it makes in 3DMark.


Now heres the kicker though: after a certain point, the increased speed OFFSETS the loss due to the checks. While you may therefore get better performance, it will at best be minimal, unless you are like krabs and can maintain an INSANELY HIGH MEMORY CLOCK. But the gains if any are once again minimal. How many points for a memory increase that big? Is it worth it?

I invite you all to check this out yourselves on your 7850 so me and roadkill can either be proven right or wrong.
Edited by kmac20 - 1/3/13 at 3:38pm
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post #2305 of 4099
hello every1, im kinda new in here-

i have 1 question for ya guys, i just bought a xfx 7870 1 ghz edition, the performance is very very nice but, i think i have some problems with da overheating, i have been messing around with settings (not overclocking) because i noticed that my card went up to 104°, if i turn off da tessellation, no AA, , i get 93°c, is this normal?

i have been testing my card with medal of honor warfighter.


thanks




btw, i have 4 120mm fans into my case and the weather temp is around 10°C.
post #2306 of 4099
Quote:
Originally Posted by pemo View Post

hello every1, im kinda new in here-
i have 1 question for ya guys, i just bought a xfx 7870 1 ghz edition, the performance is very very nice but, i think i have some problems with da overheating, i have been messing around with settings (not overclocking) because i noticed that my card went up to 104°, if i turn off da tessellation, no AA, , i get 93°c, is this normal?
i have been testing my card with medal of honor warfighter.
thanks
btw, i have 4 120mm fans into my case and the weather temp is around 10°C.

Are you sure the fan of your card is on auto ?
Maybe on accident you have put it on manual 20% or so.
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post #2307 of 4099
Anyone grab the new Tahiti LE based 7870. Looks like a great choice for 1080p. Superbiiz has one for $229 shipped AC which is seriously tempting. Reviews look solid from most sites.
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post #2308 of 4099
thanks for ur reply :thumb.gif

yes, i double checked and the "enable manual fan control" is unchecked , im getting frustrated cigar.gif i need help please :'(

im using the ccc 12.11 beta
Edited by pemo - 1/3/13 at 6:33pm
post #2309 of 4099
Quote:
Originally Posted by kmac20 View Post

I
I also doubt very much that coincidentally 3 of us achieved the same results on 7850s....As far as I know it shouldn't be different across different chips, because it has to do with memory error checking on all 7850s.
Look just try it out krabs. drop your clocks down to around 1250 and see how big of a difference it makes in 3DMark.

.
okay I did a few 3dm11 runs in a row
here are the results
1140mhz core @ 1215mv voltage for all the runs

1250 mem ___ graphic 7423 average of 3 runs
1260 mem ___ graphic 7313
1270 mem ___ graphic 7318
1280 mem ___ graphic 7330
1350 mem ___ graphic 7440
1450 mem ___ graphic 7537

I continued testing the 1250 memory but it didn't increase higher core OC stability in benchmark or game.
now I should keep the 1250 memory and save some energy since it's same performance as 1350 ?
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post #2310 of 4099
biggrin.gif

More evidence supporting my position.

I once again say yes! Absolutely!
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