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"Overclocking" my Radeon HD 6770

post #1 of 61
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Before anyone says anything, yes, I'm a newbie when it comes to "overclocking." I've been on Desktop Review and Notebook Review for about a year and a half and have seen many references to this site. It was only now that I had any use in making an account. Now, on to the questions:

I play Battlefield 3. I have an AMD Radeon HD 6770 1GB (which, I just recently found out, is simply a rehash of a previous GPU, the Radeon HD 5770 - beautiful marketing scheme).

I was messing around with the video settings since I familiarized myself with in-game monitoring software (HWiNFO64 and MSI Afterburner). I'm able to get roughly 25-35fps during demanding parts of the game with mainly High along with some "Ultra" settings thrown in. Ideally, I would like a little more (nothing like 60+ seeing as how I have a 60Hz monitor, but something within reason). I was curious if overclocking my GPU a tad would result in a slightly increased frame rate.

My priority here is being able to safely push my graphics card to a level where it increases performance, but doesn't sacrifice stability.

For those "too long, didn't read," I'll sum it up:

If I kept my current video settings, but overclocked my GPU a tad, would I see an increase in FPS in-game? Is overclocking even possible or recommended with my current GPU?


I'll post whatever extra information you need. Just say the word. Thank you.
    
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post #2 of 61
The first thing you need to know, overclocking does not significantly improve your performance. It also depends what kind of bottleneck are you suffering. If its a CPU bottleneck, there's nothing that a GPU overclock can do. Also, overclocked hardware tends to produce significantly more temperature so ensure there's good ventilation in the case.

I see you have an ATI card. Its very easy. Install the latest version of Catalyst Control Centre from AMD website. I assume that you've already installed it.

Open the CCC and on the top left there's a search bar. Type overclock there and it should return you with a result to overclock your GPU. Select it, and accept the disclaimer (which is basically a warning that if your GPU fries due to overclock, its not their problem). You'll get two sliders, one for the core clock and the other for the memory clock. For beginner level, don't change the memory clock. Just adjust the core clock in small intervals by about 20-30 MHz. Once you reach the maximum degree of overclocking, your games will start to crash. Now just decrease your clock by about 20 MHz from this maximum value.

As easy as that. As you mentioned you're new to overclocking, this is the very basic overclocking. If you want to know more, post here and Overclock.net has very kind people, they'll walk you through each and every step of advanced overclocking.

Let me know how your overclocking goes.

EDIT: Overclocking is never recommended by the companies. Yes, your GPU should handle OC fine. And (a faint) yes, you can expect at most 5 fps increment (and that too, if BF3 is bottlenecked by your GPU).
Edited by crysisftw - 7/9/12 at 7:21am
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post #3 of 61
Quote:
Originally Posted by crysisftw View Post

The first thing you need to know, overclocking does not significantly improve your performance. It also depends what kind of bottleneck are you suffering. If its a CPU bottleneck, there's nothing that a GPU overclock can do. Also, overclocked hardware tends to produce significantly more temperature so ensure there's good ventilation in the case.
I see you have an ATI card. Its very easy. Install the latest version of Catalyst Control Centre from AMD website. I assume that you've already installed it.
Open the CCC and on the top left there's a search bar. Type overclock there and it should return you with a result to overclock your GPU. Select it, and accept the disclaimer (which is basically a warning that if your GPU fries due to overclock, its not their problem). You'll get two sliders, one for the core clock and the other for the memory clock. For beginner level, don't change the memory clock. Just adjust the core clock in small intervals by about 20-30 MHz. Once you reach the maximum degree of overclocking, your games will start to crash. Now just decrease your clock by about 20 MHz from this maximum value.
As easy as that. As you mentioned you're new to overclocking, this is the very basic overclocking. If you want to know more, post here and Overclock.net has very kind people, they'll walk you through each and every step of advanced overclocking.
Let me know how your overclocking goes.
EDIT: Overclocking is never recommended by the companies. Yes, your GPU should handle OC fine. And (a faint) yes, you can expect at most 5 fps increment (and that too, if BF3 is bottlenecked by your GPU).

If this was true, there would be no overclock.net, techpowerup, HWBOT, ect.

The 5770/6770's generally have good OC headroom. Many have been known to exceed 1000 on the core and 1350 on the memory using a voltage boost via unlocked Afterburner.

Alas, my old HD 5750 could only hit 960MHZ on the core, but it did show a 30% performance gain across the board from the stock 700 core.

You should be able to run some pretty high settings in BF3, but be sure to not use excess AA or AF, as those are the main performance killers.
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post #4 of 61
I'm saying you cannot make a 6770 a 6870 by overclocking. And just because you get 30% performance increment (apparently) doesn't mean everyone'll get that. The guy says he's new to overclocking. If he feels like volt modding, he can ask for it. Jeez some people just cannot live without criticizing. And if he already gets 25-35 fps at most, do you frankly think it'll go up to 45, may be 50 fps by just overclocking? Think before you actually comment.
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post #5 of 61
I know you just heard about overclocking yesterday, so I'll try to be nice.
Quote:
Originally Posted by crysisftw View Post

I'm saying you cannot make a 6770 a 6870 by overclocking. And just because you get 30% performance increment (apparently) doesn't mean everyone'll get that. The guy says he's new to overclocking. If he feels like volt modding, he can ask for it. Jeez some people just cannot live without criticizing. And if he already gets 25-35 fps at most, do you frankly think it'll go up to 45, may be 50 fps by just overclocking?

I OC'd my HD 5750 to HD 6850 performance.

700

Then I OC again for an additional 57% biggrin.gif


700
Quote:
Think before you actually comment.

Word of advice. Have a huge database of your own personal benchmarks to backup your comments.

While OP can't quite reach HD 6870 performance (it has like 300 more shaders), he can leapfrog two tiers (HD 6790 and HD 6850) of performance with a 1GHZ core clock.

596

Edited by damric - 7/10/12 at 1:14am
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post #6 of 61
I have to ask. Just how did you do that? Of the nine cards I've owned, I never could achieve that performance even with the reference design ones. Of course then I tried to keep them in reasonable temperatures because they kept crashing when they got hot. Don't you have any overheating issues?

And sorry for being rude, I frankly didn't you could do that on stock cooler! I'm amazed. And kinda jealous.
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post #7 of 61
The HD 5750 was a Sapphire Vapor-x using a pencil voltmod since it did not have programmable voltage. Temperatures with the voltmod were much higher but never more than low 80's during heavy stress testing. There are a few guys on the forum that broke 1100 core on that card with the same voltmod.

My HD 6850's are also stock. One card will do about 1050 before artifacting. The other, 1020. They don't really get hot, maybe 75C at max OC and under max stress. I rarely bench them over 1000/1200 though and I only OC them to game if I need the extra power to keep up the FPS since mostly I'm VRAM limited. Once I push the AA past a certain threshold, the FPS drop off a cliff.

I don't just raise clocks on one component though. I tune my whole system (CPU, NB, RAM, GPU, Drivers, ect), and all of the little things add up into one nice performance increase.
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post #8 of 61
Newsflash from Backwardso World, where faster is slower:
Quote:
Originally Posted by crysisftw View Post

The first thing you need to know, overclocking does not significantly improve your performance..


rolleyes.gifthumb.giftongue.gifhandlebarssmiley.pngheadphone.gifbusinesssmiley.pnghelmetsmiley.pngthinking.gifcheers.gifwave2.giflaugher.gifyessir.gifdoh.gif

That being said, OCing your 6770 will make it "really, really inadequate for BF3" rather than "really, really, REALLY, inadequate for BF3"
Edited by Jagged_Steel - 7/10/12 at 7:29am
    
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post #9 of 61
Thread Starter 
- An increase of 5fps would be beautiful, but I have no issues with turning the video settings down, as well (I'll still overclock the GPU if the CPU isn't the bottleneck). I'm just looking for my 6770 to push a little harder (safely and stably, that is). I understand the performance boost will be minimal, but a boost is a boost.

- Overclocking my GPU would be moronically stupid if my CPU tops out before my GPU does (I believe this is the gist of "bottlenecking" - similar to the limiting reactant, for all of you fellow nerds). I believe I have a way of checking this (Battlefield 3 has in-game hardware monitoring).

- Default core clock speed = 850MHz / Default memory clock speed = 1200MHz

- From what I've seen online: Achievable core clock speeds: 900MHz (should be no problem), 1000MHz (from damric's charts), and 1006MHz (pushing it?) / Achievable memory clock speeds: 1240MHz, 1300MHz (unverified), and 1350MHz (from damric's charts - pushing it?)

- "For beginner level, don't change the memory clock."



- Any problem with just having my GPU's fan run at 70-80% whenever my computer is on? My CPU's fan is always at 100%, anyway.

- At what core/memory clock ranges do I need to start worrying about altering the voltages?

- MSI Afterburner or AMD Vision Engine Control Center/AMD OverDrive to control the GPU settings? Also, I don't think I'll need Catalyst Control Center. It appears everything can be done with AMD OverDrive (even gives max settings: core clock max = 960MHz, memory clock max = 1445MHz, + fan speed option)

- History lesson (I've been curious about this - please correct any misinformation): AMD makes GPUs. AMD bought up a rival(?) company, ATI. AMD and Nvidia are competitors in the GPU market. Other companies buy their GPUs and futz with them (for example, I have a Sapphire Radeon HD 6770, but I've seen ASUS, XFX, and HIS, as well). Do these companies mess with the GPU at all? I've seen 6770s with different core clock speeds and this has confused me a bit.

Quote:
Originally Posted by Jagged_Steel View Post

That being said, OCing your 6770 will make it "really, really inadequate for BF3" rather than "really, really, REALLY, inadequate for BF3"

I've had BF3 since it came out and I've been fine. How do you figure my GPU is inadequate? I may have been wrong about what FPS I reach (looking away from heavy combat I believe I can easily reach 45-50fps), but "inadequate?" She's been nothing but faithful to my budget build smile.gif
Edited by Metallica93 - 7/13/12 at 12:35am
    
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