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~~The GTX 670 Overclocking Master-Guide~~ - Page 240

post #2391 of 3357
Quote:
Originally Posted by EarlZ View Post

Dunno if anyone has noticed but even at 99% load on Heaven 4.0 there are times that the GPU will reduce its clocks ( not hitting the 70c mark ) I tested my cards with the nvidia demo and it locks it to 1228 for the entire duration (30mins)

Might be throttling due to exceeding the power target. I haven't run heaven4, is load lighter in the brief periods between scenes?
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post #2392 of 3357
Is Core: 1071MHz / Boost: 1150MHz / Mem: 1640Mhz a respectable overclock for GTX 670 FTW?
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post #2393 of 3357
Quote:
Originally Posted by newone757 View Post

mine doesnt do that on heaven

Whats your total boost clock? Can you post a screenshot on the GPU core graph for an entire heaven benchmark run.
Quote:
Originally Posted by michael-ocn View Post

Might be throttling due to exceeding the power target. I haven't run heaven4, is load lighter in the brief periods between scenes?

I have the power target at 132%, its not even hitting 110%, So IDK. Other benchmarks lock it at 1228 since Im not hitting 70c.
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post #2394 of 3357
I'm a little disappointed by my Asus GTX670-DC2OG-2GD5 card. Watercooled (EKWB + backplate) and I'm currently running at 1228:1728 @1.187V .. highest load I ever managed to get out of it with those clocks were 100% (=230W)

Why did I mod the BIOS? Highest stable performance without extra tools + I can use it in MacOS X that way.

card doesn't really scale well at all. 1.212v didn't help either, neither did 1.200v .. can't really get much more out of it fully stable. Maybe another 13MHz step, but that would be the total top.

temps are idle around 28ish, load usually peaks at 53C at most!!!
post #2395 of 3357
Quote:
Originally Posted by EarlZ View Post

Whats your total boost clock? Can you post a screenshot on the GPU core graph for an entire heaven benchmark run.
I have the power target at 132%, its not even hitting 110%, So IDK. Other benchmarks lock it at 1228 since Im not hitting 70c.

I have it set to 1120, but at load it sits at a constant 1163. Ill try to post a shot later if I get a chance
   
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post #2396 of 3357
Hey fellas, new to forums, long time lurker. Looking for some help.

Signed up to ask a few questions... been overclocking my Asus 4GB GTX670, and I've made several profiles that I'm experimenting with and tweaking to see which performs best.

160 gpu clock/625 mem clock for 1254 max boost is pretty much my max overclock, I can push memory much higher (but I also fail at noticing artifacts... are they supposed to be decently obvious because I honestly see none) but if I push gpu offset up a few it'll crash. Also, your max boost only increases in multiples of 13, but I noticed that I crash after 167 or so, which isn't another 13 past the last multiple (156). Curious as to why this is.

Anyway, power % throttles the hell out of me at that point, however... my performance is still better than any other configuration. I hit 1049 score even while throttling quite a lot. The next best I can hit is 1010-1020, but even those settings throttle by at least by 13 2-4 times throughout and a pretty decent sized 13-26 for a few seconds near the end.

The least throttled score I can get above 1000 is 130/400 offsets, and maybe 118/500 which I'm about to try out. Anything that is geared to not throttle at all puts me below 1000 score. At stock clocks, score was around 920, so I'm quite impressed with what I can do with this overclocking.

Anyway, my question then is, can I expect my performance to remain better with that throttling even in regular games? I've heard memory offset doesn't affect nearly as much, however it seems to help Heaven out a ton. Are games different? I also don't actually play the most intense modern games, really... Aside from extremely heavily modded Skyrim, which already ran like a dream before overclocking. Should I even out the throttling even at a performance hit, is there any benefit to this? The guide describes the benefit as better performance... but that doesn't seem to be the case. I wish I was one of the lucky ones not getting throttled by TDP%. 122% is max btw.

Next question, is it unsafe to raise voltages that high? Is it unsafe to offset the clocks regardless of voltages? What kind of life expectancy hit can I expect to take? I seem to be able to run stable at default or near default voltages... gotta leave it running for longer to test that out some more though.

tl;dr I want to know if I can safely keep my overclock on that max offset setting mentioned in order to achieve the best performance described, or should I take the performance hit & operate at a modest factory overclock style 120/? offset. I am confused by the discrepancies I've encountered and would like to learn more. Particularly why I haven't really noticed artifacts with such high mem overclocks - really, what is normal with a non-factory oc'd card?

Thanks in advance for any help given, sorry for the long post. Fairly new to this (but I did just totally whoop ass at my first CPU overclock...)

Edit: reading through here I notice people stating their power % never even gets that high. What causes high power use? Do PSUs have anything to do with this?

I will add that I recently put my AC back in the window now that winter's done, so my temps are lower. And even though I wasn't hitting 70 before, it seems my throttling has decreased. All the throttling would line up right with the power %, regardless of what the temp was, so it is power % causing it. The throttles happen in the same areas of the graph now too, but they just seem like they're less long or powerful after decreasing temps. Could temps below 70 help throttle? Or perhaps power use increases due to high temps? Something like that?
Edited by jessevale - 5/7/13 at 9:08pm
post #2397 of 3357

You'll generally use less power in games than you do in benchmarking, so just because you are power throttling in benches doesn't mean you will in games.  It's still a little strange that you ar epower throttling though, most cards don't run into that problem - maybe it's because you have a 4GB card.  It's entirely dependent on the card though, nothing else in your system affects the power use.

 

In any case, you can't overvolt the cards without modding the BIOS (unless you have a Lightning card?), so there's no danger there (even with the BIOS mod you can still only get 1.21V).  I would go ahead and run the card as high as you can get it stable, and not worry about the throttling unless it becomes a big problem.  The other option is to mod you BIOS for a higher power limit, which you can easily do even if you don't want to also increase the voltage.  That would eliminate your throttle concerns completely.

 

And all the cards are different on the memory overclocking, so it's not unusual that you might get a higher memory clock than others.

post #2398 of 3357
Thanks for the reply.

Well I was playing neverwinter online yesterday just to check it out and noticed some weird stuff but mostly just horizontal lines moving up the screen, only a couple times. Like refresh rate looking stuff. That was with 120/500 I think so maybe that was artifacts, but it's also a really crappy open beta so idk.

I did notice the other weird stuff in the opening FMV... Which does seem like artifacts to me, because FMV shouldn't be silly like that I don't think? It's not even real time.

So I suppose I need to move on to testing in games. I'll continue fiddling with it and reading info here, if anyone has more thoughts on my questions it'd be nice to have some more insight. Thanks again.
post #2399 of 3357
Theres a lot of texture flickering in that game so dont worry if you are not getting it in any other games then you are fine.
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post #2400 of 3357

The kind of artifacting you would be looking for is small dots flashing on and off on-screen, or weird looking blocky textures, or textures flashing.  It's usually pretty noticeable when it happens, although the small dots can sometimes be hard to notice.

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