MSi afterburner and octane

[sirkaoselite]

Hi all, i' ve teste my two 980's with stock settings and clocked settings using MSI afterburner and....there' s no difference at all in the rendertimes, it is because MSi afterburner clocks the graphical mhz's? Octane is using basically cudacores right? so it' s the part of the GPU that' s similar to a CPU but with more cores? There' s a way to overclock the cudacores? It is possible?
thanks.

[rappet]

Yes, you can overclock your gpu.
I use Presicion X16, but with Afterburn you can do it too.
Probably the best way to learn is watch youtube vids.
This is one of them
http://youtu.be/W36EAnHp4oA
Greetz,

[sirkaoselite]

Yes, you can overclock your gpu.
I use Presicion X16, but with Afterburn you can do it too.
Probably the best way to learn is watch youtube vids.
This is one of them
http://youtu.be/W36EAnHp4oA
Greetz,

I' ve seen already some videos...basically i set at the maximum all...watching obv the temps....same result in render time

[glimpse]

firstly, what is Your card? if You're running stock cooler Your GPU is going to be thermal throttled anyway..

[prehabitat]

Get GPU-z and watch your MHz. Willing to bet they throttle as temps raise... Z

[sirkaoselite]

Now this is a strange thing that i' ve tested...basically (i have two gigabyte GTX 980 g1 gaming) when i start the pc...if i open MSi afterburner it drops the gpu's performances like shit...to put away this underperformance state i need to restart the pc, if i do not start the MSi afterburner the performance will be what they would be from two 980's (octanebench with decrease of performance: 60 points, restarting the pc: 200...heh) this is strange because i can set to the max the gpu' s on msi...the performances will be the same underperformed...it is some sort of block that the two gpu' s actuate if they detect an overclock program? really really strange.

the temps are alright even at full load, 35-40-45 degrees (they mount a very good stock cooler)

[rappet]

You can try PresicionX
Maybe you can work better with that
http://www.evga.com/precision/

[glimpse]

..if i open MSi afterburner it drops the gpu's performances like shit...to put away this underperformance state i need to restart the pc, if i do not start the MSi afterburner the performance will be what they would be from two 980's (octanebench with decrease of performance: 60 points, restarting the pc: 200...heh) this is strange because..

there's nothing strange =) You OCed too far & GPUs tried to prevend from damaging Your cards. Firstly You need to turn on MSI & restore defaults..then restart Your PC. Once that done, turn on MSI & start pushing, little by little..50 MGZ incriments & fire up OctaneBench everytime..-OC depends mostly on luck with Your given card..200 is good & expected result,..at most on air.. You're looking to smth like 220 [in terms of OctaneBench]..

keep in mind..OctaneBench is very light workload - basically puting only core on load. If You pass it, that doesn't mean Your GPUs are going to be stable. Load something heavy =) like heavy scene, huge resolutions, a lot of meshes & textures - taht is going to put more stress on VRAM & VRMs =) You might see some drop in clock speeds (the same You observed already) what would say to You to lower OC a bit.

Good luck & keep us updated..

P.S. cooler matters less than the space between Your GPUs..if You have "very Good" cooler & GPUs with backplate it's straigt dumb to put those GPUs side by side (without extra space in between) as You choke at least one of them & also heating other.. what leads to..instability & lost clock speeds..taht require reboot =)

do not push too far & You should be good.

[sirkaoselite]

..if i open MSi afterburner it drops the gpu's performances like shit...to put away this underperformance state i need to restart the pc, if i do not start the MSi afterburner the performance will be what they would be from two 980's (octanebench with decrease of performance: 60 points, restarting the pc: 200...heh) this is strange because../quote]

there's nothing strange =) You OCed too far & GPUs tried to prevend from damaging Your cards. Firstly You need to turn on MSI & restore defaults..then restart Your PC. Once that done, turn on MSI & start pushing, little by little..50 MGZ incriments & fire up OctaneBench everytime..-OC depends mostly on luck with Your given card..200 is good & expected result,..at most on air.. You're looking to smth like 220..

keep in mind..OctaneBench is very light workload - basically puting only core on load. If You pass it, that doesn't mean Your GPUs are going to be stable. Load something heavy =) like heavy scene, huge resolutions, a lot of meshes & textures - taht is going to put more stress on VRAM & VRMs =) You might see some drop in clock speeds (the same You observed already) what would say to You to lower OC a bit.

Good luck & keep us updated..

P.S. cooler matters less than the space between Your GPUs..if You have "very Good" cooler & GPUs with backplate it's straigt dumb to put those GPUs side by side (without extra space in between) as You choke at least one of them & also heating other.. what leads to..instability & lost clock speeds..taht require reboot =)

do not push too far & You should be good.

Of course i returned with the default settings...but the problem is another, whenever i only run the MSi afterburner without touching anything....the performance are less than half, instant it put a block only by executing the program once, i resolve restarting the computer and without touching msi afterburner again

[mdharrington]

I was getting repeatable performance improvements on my 970 using afterburner....

Tested a few weeks ago so cant remember the numbers....but I think it was between 5-10% improvement in MSamples/sec

the most important part is overclocking the power/thermal barrier to 106% (may be able to go higher on 980...970 limit is 106%) as the GPU kinda dynamically overclocks and the 106% is usually the limiting factor....you can raise fan speed to help with the thermal barrier.

But as was said....the boost clock will be meaningless as that is just a temporary boost. 200mhz on core clock...and 350+ on memory is typical decent overclock. I would be willing to bet that 100mhz core and 175 mhz memory is 100% guaranteed to run without issues...about a 10% boost in clock speed.

I would save a preset, and engage it before a big render....5-10% may seem trivial...but I did some 90hr renders a few months ago...and that is a significant reduction over that time.