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MSI 560Ti Twin Frozr II Memory OC problem

post #1 of 6
Thread Starter 
So i have these two MSI 560ti 1GB graphics cards and ive isolated the problem i have in overclocking when using MSI Afterburner 2.3.1, my current OC settings are 1000/2000/2050. At stock, MSI afterburner automatically sets the overclock for my memory clock to "2100". But i find that i artifact like crazy when trying to benchmark (all max) on Heaven Benchmark or get those spots of purple and black artifacts on my screen. I even isolated the problem and ran all stock clocks 880/1760/2100 with 1.1v and ran Heaven benchmark and i still saw the artifacts... So then i figured i could lower my memory clock? I lowered it eventually to 2050 and without a doubt, it ran smooth. In fact i am running right now at 1.1v 1000/2000/2050 stable... but my question is, why is it that i have to "downclock" (is that what you call it?) my memory for stability?

Is there a huge difference that im missing out between 2050 memory clock and 2100 (stock) ? I cant even run stock 880/1760 with the stock memory clocks without it artifacting.

I ran heaven benchmark and ran it stable and got a score of 57.2 fps /1442 Score, but with the memory clock up, ill probably pass the the test despite the artifacting and end up getting less FPS (around 30)... in fact i notice that if i try to go past 2050, my GPU #1 on MSI Afterburner seems to not work as hard as my #2 ? My first card would have a "Max" of only 68% while my second GPU has a Max of 99% Usage.... Is there something wrong with one of my cards ?

Thanks in advance for any advice given. biggrin.gif
post #2 of 6
I see in your system you are cooling the GPU's with a closed loop. This is great but you have no cooling on the VRM's or memory. I expect the lack of cooling is why you are seeing artifacts. I would invest in a couple of spot cool fans and direct them over the memory/VRM's.

The difference from 2100 and 2050 on the memory wouldn't be noticed without running a fps counter and even then, it would barely show.

Hope this helps a little smile.gif
    
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corsair force series 3 Custom water cooled loop using XSPC and EK Windows & pro Asus VG278H * 3 
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post #3 of 6
Thread Starter 
I have some copper heatsinks stuck on the memory modules, and i guess the VRM's come with a stock heatsink? I think its an aluminum heatsink? In GPU-Z i cant see my VRM temps or some sort of temperature gauge besides the GPU temp itself. Does my 560ti model just not come with a temperature gauge for the VRM area ?

So it being unstable just has to do with the cooling? (hope i dont have to go through any RMA or anything)
post #4 of 6
The copper heat sinks are fine and should keep the VRM's and memory cool enough. No need to worry about RMA but I would still want some cool air being blown over them.

The spot cool fans would be ideal and would cool the memory down enough to run at 2100Mhz without artifacts.

http://www.overclockers.co.uk/showproduct.php?prodid=HS-007-AN

Something like that is ideal and a cheap way to cool the memory.
    
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Asus Rampage IV Formula Asus Geforce GTX Titan Asus Geforce GTX Titan Avexir 
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corsair force series 3 Custom water cooled loop using XSPC and EK Windows & pro Asus VG278H * 3 
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G510 Logitech XFX1050 Black edition 810 Switch NZXT G9 Logitech 
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Roccat SOTA very old and cheap Yamahas but awsome sound 
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MotherboardGraphicsGraphicsRAM
Asus Rampage IV Formula Asus Geforce GTX Titan Asus Geforce GTX Titan Avexir 
Hard DriveCoolingOSMonitor
corsair force series 3 Custom water cooled loop using XSPC and EK Windows & pro Asus VG278H * 3 
KeyboardPowerCaseMouse
G510 Logitech XFX1050 Black edition 810 Switch NZXT G9 Logitech 
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Roccat SOTA very old and cheap Yamahas but awsome sound 
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post #5 of 6
Thread Starter 
Im going to do some sort of mod that uses the original stock fans from the Twin Frozr II heatsink and use one fan per housing pointing at the VRM and memory and connect it back to the original graphics card fan controller to power both of the fans. Ill see to it though, 2050 and 2100 from what youre telling me doesnt make a big difference on FPS so i guess ill just put this off till im free...

Thanks, repped!
post #6 of 6
Thanks and glad I could give some usefull info smile.gif
    
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Hard DriveCoolingOSMonitor
corsair force series 3 Custom water cooled loop using XSPC and EK Windows & pro Asus VG278H * 3 
KeyboardPowerCaseMouse
G510 Logitech XFX1050 Black edition 810 Switch NZXT G9 Logitech 
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Roccat SOTA very old and cheap Yamahas but awsome sound 
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Asus Rampage IV Formula Asus Geforce GTX Titan Asus Geforce GTX Titan Avexir 
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corsair force series 3 Custom water cooled loop using XSPC and EK Windows & pro Asus VG278H * 3 
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G510 Logitech XFX1050 Black edition 810 Switch NZXT G9 Logitech 
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