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680 classified overclocking help

post #1 of 7
Thread Starter 
hi guy just a few noob questions if you can help id greatly appreciate it,

firstly when oc'ing should i be cranking up the core clock first to find stability then when i do do i crank up the mem clock?

also does the Power target need to be set to max when oc'ing?

also if im running tri sli would it be wise to have say the bottom card running roughly 5mhz under the middle card and the middle card running 5mhz under the top card and etc??

also at what increments should i crank up the two values?,

also how long should i wait to crank to a higher level like say crank up then 5 mins crank up then 5 mins then ... etc ?

thank you kindly fellow oc'ers

smile.gif
post #2 of 7
Yup first you need to raise up the Core clock then when you have found sweetspot/target clock and stable then you may rise the Memory clock.

For dual or more VGA configuration set up you need to use same clock because when you use different clock then it will use the lowest Core clock for them.

You may try to raise first : 50MHz or 100MHz then raise it again with +10 - 20MHz.
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post #3 of 7
Thread Starter 
also one big question is does increasing the memory clock speeds in turn help me increase more core memory? for eg

if i stablize my core clock to say 100mhz
then i increased the memory clock , would i then be able to push my core a bit more? is that how it works?
post #4 of 7
Thread Starter 
hey thanks for response, so your saying to stablize my core then start and try stabalize more memory clocks? and also did you mean i should do all this with "sync all cards" on?
post #5 of 7
Quote:
Originally Posted by cursedprophet View Post

also one big question is does increasing the memory clock speeds in turn help me increase more core memory? for eg

if i stablize my core clock to say 100mhz
then i increased the memory clock , would i then be able to push my core a bit more? is that how it works?
If you raise memory clock naturally it will becomes unstable for the OC'ed core clock.
Like this for example :
- You got core clock stable at 1200MHz with memory at default then you raise memory up to 1800MHz with core clock at default. So now when you use core clock at 1200MHz and memory at 1800MHz it might be unstable, you need to lower both of them abit, like 1180 - 1190MHz for core clock and 1700 - 1750MHz for memory clock smile.gif or you may choose hold core clock at 1200MHz but more lowered your memory clock at 1600 - 1650MHz.

Quote:
Originally Posted by cursedprophet View Post

hey thanks for response, so your saying to stablize my core then start and try stabalize more memory clocks? and also did you mean i should do all this with "sync all cards" on?
Your welcome ^_^ I think you need to find stable clock for every card first smile.gif
Such as : when 1st card stable at 1200/1800 and 2nd card stable at 1180/1750 then I think you might wanna use 1170/1700MHz for both of them in SLI or CF.
Remember when you use dual card setup it will be hard to OC and usually get lower abit.
Edited by neoroy - 9/13/13 at 10:01am
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post #6 of 7
Thread Starter 
Ohhhhh I see ok ok cool that's a very easy way of putting it thanks dude seriously I needed a lamens explanation lol, ye it very difficult to find stability when syncing all three cards as I dunno which card is the unstable one when I crash lol


Also would it be ok to have each card oc at different clock speeds and mem clock speeds or should I be aiming for all three card to be hitting the same clock speeds for both core and mem of the lowest performing card ?

Thnx smile.gif
post #7 of 7
You need to syncronize all your cards at the same speed or clock smile.gif
If you use default clock for example 2 cards : Zotac GTX680 AMP 1111MHz and MSI GTX680 TF OC 1058MHz then it will be sync to 1058MHz for your cards.
If you OC better use lowest OC card.
But I think with dual or more set up it will be reduce abit the ability of overclocked card.
Sorry late reply biggrin.gif kind of busy here ^_^
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SkynetX
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