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Hows my overclock look to you guys? - Page 4

post #31 of 49
1.3ish. I probably wont take my card over 1.25.
post #32 of 49
Yeah, 1.3 is the general "air" voltage limit.
post #33 of 49
Thread Starter 
Wow... Just done the lil juke to raise my slider values on Afternurner. I can raise my core clock and memory clock. Right now i'm stable at 1175/1575 @ 1.156v (Core voltage slider is at 1156 so the way i take it my volts is at 1.156, please confirm i'm right about that so i won't overvolt and mess something up.) I'm gonna try and bump my memory up some more and then maybe my core.

@ Derpinheimer - May i ask what you have your overclocked at? Just wondering for a base line to make sure i'm doing it right.. Whats a good core and memory to shoot for?
post #34 of 49
Always max out the power limit. The card will use just as much as it needs. No more, no less. Too low power limit will cause your overclock to throttle and you will see your core speed fluctuate in GPU-Z when under load.

Because the vdroop on these cards is so high, you can max out the voltage slider to 1300mV and the voltages won't go above 1.25v under load which is perfectly healthy. Also, don't use those burn programs as they're useless for testing stability as the load is unrealistically high compared to any gaming load. I've found Far Cry 3 to be a good way of testing GPU overclocks, but any other heavy game would do.

I can do 1150/1400 rock solid with my 7950 Vapor-X with set voltage of 1250mV. Doesn't reach 1.2v under load. 1200 is doable, but i've noticed some artifacting in FC3 even when voltage is maxed out at 1300mV.

But really, keep checking GPU-Z for throttling.
Edited by Fulvin - 2/26/13 at 7:15am
post #35 of 49
Thread Starter 
I dont have battlefield 3 or far cry 3 to test stability. I just got into pc gaming. Would metro 2033 be a good game to test stability?

Tappin' from my Galaxy S3
post #36 of 49
Quote:
Originally Posted by oblivious View Post

I dont have battlefield 3 or far cry 3 to test stability. I just got into pc gaming. Would metro 2033 be a good game to test stability?

Tappin' from my Galaxy S3

I consider my card stable if it handles the things i use it for. No reason to have it "10 hour Heaven stable" just because. It's up to you what you want to consider stable, this is just what i do.
post #37 of 49
1175MHz @ 1.156V is good and this is pretty much what I'm getting also with my Vapor-X at that voltage. You may try 1200MHz. My card already throws occasional artifacts at that speed and 1.15V. I need 1.187V for 1200MHz stable.

If you got Hynix 1500MHz chips on your card, they can probably do up to 1700-1800MHz or more if you bump the voltage. Mine will do 2000MHz but only as long as the card is cold.

And watch those VRM temps in GPU-Z. They will be most likely the limit to your OC, not the gpu core.
Edited by glina - 2/26/13 at 7:34am
post #38 of 49
@Oblivious:
I run min at 1200/1.137v core + 1770/1.6v memory for general use, but can go to 1275/1.187v + 1900/1.625v as a max.

If your voltage is showing up in GPUz as a max of ~1.15v, and drops to around 1.1v under load, then you have set the voltage to 1.156v. If its still reading ~1.2v, it hasnt changed.

@Fulvin: When people say max safe voltage, you think they mean to say after Vdroop, or before Vdroop? I was thinking before.

@Glina: How to know which Hynix chips I have? I saw someone state the two types of Hynix available... but I couldnt find the thread. I have T2C, which looks like the normal stuff. And mine can hit 1900 xD
post #39 of 49
Quote:
Originally Posted by Derpinheimer View Post

@Glina: How to know which Hynix chips I have? I saw someone state the two types of Hynix available... but I couldnt find the thread. I have T2C, which looks like the normal stuff. And mine can hit 1900 xD

I always forget to check mine :-). I guess as long as it's Hynix, the OC is great.

here are the types:
https://www.skhynix.com/products/graphics/view.jsp?info.ramKind=26&info.serialNo=H5GQ2H24MFR
post #40 of 49
Oh yeah, R0C is the good stuff. I wonder if any 7950s have that?
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