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~~The GTX 670 Overclocking Master-Guide~~ - Page 29

post #281 of 3357
Alright now that I got my Ivy Bridge to 4.6 and stable, I'm working on my EVGA Superclocked+ 4GB 670's (2xSLI).

Just with the starting test (1100 boost clock), my first card hits 70c pretty quick (about 30 seconds)... I've been stopping the Heaven test right off at that point, but didn't see any artifacts at that point. I'm running at surround resolutions as that is what I'm planning to run. (5760x1080) Is 70c a hard number that I have to hit "STOP" immediately for or is it a guideline to be around that number?

1100 boost clock I didn't think would push me all the way to cap right off.... The cards are pretty damn close together though on the motherboard (PCI-E slot 1 and 2 on G1 Sniper 3 so they both run at 16x) cards are almost literally a pen width apart... The case has good airflow though, I minimized the cabling and it's a HAF X.

Memory is set to base, voltage is set to max as in the quick guide and so is power target (122%).

OK I think I'm screwed.... even without changing my overclock from factory (base power target, base voltage) I'm hitting 70/71c in Heaven... =/ Not sure how to get more airflow into this thing other than to install a second top fan... but even then it's not going to the video card directly.

If I don't over-ride the fan settings I hit up to 80c using the base cards... even with the case side open... so I don't think it's airflow... did I just get bad cards?
Edited by Neovalen - 6/30/12 at 3:16pm
post #282 of 3357
Thread Starter 
It's fine if you go over 70c IF you can't actually figure out a way to stay below 70C. All that's going to happen is a 13MHz decrease whenever you go over 70C. So it's not that big of a deal. Just use the quiet fan-profile and aim to stay below 79C (which is right below the second throttle point).
post #283 of 3357
Quote:
Originally Posted by SeanPoe View Post

It's fine if you go over 70c IF you can't actually figure out a way to stay below 70C. All that's going to happen is a 13MHz decrease whenever you go over 70C. So it's not that big of a deal. Just use the quiet fan-profile and aim to stay below 79C (which is right below the second throttle point).

Thanks... for some reason my fan speed profile only allows 30-80% (yellow lines)... Only way I can keep it under 80c under max load (Heaven 5760x1080 with it all turned up) is to have my fan speed up at max.... then it sits at 78/79c... kind of sucks since I didn't even do any overclocking of my own on this thing.... other than to turn up the voltage limit / power target... Precision shows I'm getting 1125 core only during the test

Edit: Just did some real world testing... BF3 @ Max Settings... granted at 5760x1080 with 55fps. With fan at 100% I was still hitting 79/80c with the cover off the side of the case... did I get a pair of dud cards or is there something I'm missing...
Edited by Neovalen - 6/30/12 at 4:37pm
post #284 of 3357
Thread Starter 
Quote:
Originally Posted by Neovalen View Post

Thanks... for some reason my fan speed profile only allows 30-80% (yellow lines)... Only way I can keep it under 80c under max load (Heaven 5760x1080 with it all turned up) is to have my fan speed up at max.... then it sits at 78/79c... kind of sucks since I didn't even do any overclocking of my own on this thing.... other than to turn up the voltage limit / power target... Precision shows I'm getting 1125 core only during the test
Edit: Just did some real world testing... BF3 @ Max Settings... granted at 5760x1080 with 55fps. With fan at 100% I was still hitting 79/80c with the cover off the side of the case... did I get a pair of dud cards or is there something I'm missing...

There's a lot of factors to consider. But i would say it's probably your airflow. What case do you have, how many fans, where are they located, and what direction are they blowing? I'm somewhat surprised your temperatures are still so high with the side off of your case. Try removing the PCI-E covers too.
post #285 of 3357
Guys, between thes two GTX 670, Gigabyte OC vs Asus DCUii. Which one do you think can oc better? My assumption is DCUii perform better for cooling solution. While Gigabyte perform better in oc because they are using GTX 680 pcb for that card. Or my assumption is absolutely wrong? Going to buy this card but still confuse. And does GTX 670 can outperform HD 7970 in oc?
post #286 of 3357
SeanPoe,

I bought the EVGA GTX 670 FTW a few weeks ago and immediately found your guide online (only a few days after it was first posted). Followed every step and tip to a tee and it was nothing short of awesome help! Thank you for taking the time writing it!!!

Right now I've been able to run my 670 with the following settings:

Power target 121%
Clock offset +52 MHz
Memory offset +587 MHz

Since EGA's FTW comes factory OC'ed at 1006 MHz with a 1084 MHz boost clock, adding the Kepler boost (104 MHz in my case) = 1188 MHz.
Add my 52 MHz offset and it gives me 1240 MHz MBF! Not too bad...

Side note: Friend of mine just put an aftermarket water cooling bracket on his EVGA GTX 670 FTW (same card as mine) and his card only hits temps in the mid-30s (!) under full load (running Heaven DX11 benchmark or 3DMark11). Under the same circumstances my stock fan keeps it ~64C. We have pretty much identical systems otherwise.

Anyway, wanted to say thanks again for the great guide. I signed up on the forums today just to say that (and sent rep on every post on the first page)! thumb.gif
post #287 of 3357
Quote:
Originally Posted by SeanPoe View Post

There's a lot of factors to consider. But i would say it's probably your airflow. What case do you have, how many fans, where are they located, and what direction are they blowing? I'm somewhat surprised your temperatures are still so high with the side off of your case. Try removing the PCI-E covers too.

The case I have is the HAF X (http://www.coolermaster.com/product.php?product_id=6653) in the default configuration (it has an airflow diagram on the site). The fans installed are:

1. Front Intake Fan (230mm x 30mm)
2. Side Intake Fan (200mm x 30mm)
3. Top Back Output Fan (200mm x 30mm), the Top Front Output Fan is optional and I don't have it.
4. Back Output Fan (140mm x 25mm)

I do not have the VGA holder installed as it didn't come with a fan either.

The cards are in the top 2 PCI-E slots of my motherboard (http://www.gigabyte.us/products/product-page.aspx?pid=4169). All fans are unobstructed and functional as far as I can tell.

My CPU cooler is a Hyper 212 EVO(http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099) and its blowing the hot air towards the front of the case and over the ram chips (and out the top of the case as heat rises).

Only things I can possibly do are install the optional 2nd top fan and maybe the VGA holder with a high speed fan...

Edit: I put the case side back on and my temps are DOWN compared to when the side was off... GPU1: 76C GPU2: 73C during Heaven benchmark at the factory overclock setting. Still nothing to write home about though... think the VGA holder / additional fans will help?

Also in case you care, my CPU is outputting about 82c worth of heat because of it's 4.6Ghz overclock at full Prime95 load.
Edited by Neovalen - 6/30/12 at 9:27pm
post #288 of 3357
Thread Starter 
Quote:
Originally Posted by diaBoliQu3 View Post

Guys, between thes two GTX 670, Gigabyte OC vs Asus DCUii. Which one do you think can oc better? My assumption is DCUii perform better for cooling solution. While Gigabyte perform better in oc because they are using GTX 680 pcb for that card. Or my assumption is absolutely wrong? Going to buy this card but still confuse. And does GTX 670 can outperform HD 7970 in oc?

I would say the 7970 is better in terms of raw gaming performance (once overclocked). It's not a huge difference, maybe only ~10% faster. I'm not really sure what price the 7970's are going for these days, but as long as the price/performance is the same as the 670, i'd say get the 670. So for example, if the 670 is $400 and the 7970 is $440 (10% more expensive, so the price/performance is the same), i think the 670 is the better buy. If the 7970 is under $440 then it might start to be a more favorable choice. I am a fan of PhysiX, NVidia drivers, and especially their multi-GPU support. The 670 also runs cooler (total heat, not temperature) and uses much less power (like ~30% less at max overclock). So those are a couple things that aren't really performance related to consider. Also, if TXAA pans out in the future, then that's going to be a huge advantage for the 670 (it would make up the 10% difference easily and double the quality of the AA). For me personally, i think the 7970 would need to be around ~$415 before i would recommend it over one of the $400 670's.

As for the Gigabye vs the Asus 670, i would recommend the Gigabyte if you don't care at all about getting a 'free' backplate. The gigabyte is $20 cheaper and seems to have a higher top-end overclock if you get lucky with a good card. The average overclock seems to be very similar between the two though (somewhere around 1250MHz). All things considered, there isn't much difference between them. There's pros and cons to both.
post #289 of 3357
Quote:
Originally Posted by SeanPoe View Post

I would say the 7970 is better in terms of raw gaming performance (once overclocked). It's not a huge difference, maybe only ~10% faster. I'm not really sure what price the 7970's are going for these days, but as long as the price/performance is the same as the 670, i'd say get the 670. So for example, if the 670 is $400 and the 7970 is $440 (10% more expensive, so the price/performance is the same), i think the 670 is the better buy. If the 7970 is under $440 then it might start to be a more favorable choice. I am a fan of PhysiX, NVidia drivers, and especially their multi-GPU support. The 670 also runs cooler (total heat, not temperature) and uses much less power (like ~30% less at max overclock). So those are a couple things that aren't really performance related to consider. Also, if TXAA pans out in the future, then that's going to be a huge advantage for the 670 (it would make up the 10% difference easily and double the quality of the AA). For me personally, i think the 7970 would need to be around ~$415 before i would recommend it over one of the $400 670's.
As for the Gigabye vs the Asus 670, i would recommend the Gigabyte if you don't care at all about getting a 'free' backplate. The gigabyte is $20 cheaper and seems to have a higher top-end overclock if you get lucky with a good card. The average overclock seems to be very similar between the two though (somewhere around 1250MHz). All things considered, there isn't much difference between them. There's pros and cons to both.
I bought a used Sapphire HD 7970 for about $ 346 (MYR -> USD) and it's a reference version. First I was thinking to change the cooler with Accelero or go for watercooling because I'm gonna oc it and the stock fan are noisy. But after calculate everything including the hassle, I was regret to buy the HD 7970. I need to change my chasis, buy from scratch cpu+gpu wc. Now, I'm planning to sell back this card and get GTX 670 either DCUii (non-Top) or Windforce because it will be hassle free and though the air temp is higher than wc, I don't really mind as I know both card I want have good cooling. What do you mean gree backplate? At my country, Gigabyte are expensive than the non-Top card. Is it worth it for me to sell the HD 7970 and buy a new GTX 670? And are you saying that Giga OC are better than DCUii non-Top in oc?
post #290 of 3357
Thread Starter 
Quote:
Originally Posted by Neovalen View Post

The case I have is the HAF X (http://www.coolermaster.com/product.php?product_id=6653) in the default configuration (it has an airflow diagram on the site). The fans installed are:
1. Front Intake Fan (230mm x 30mm)
2. Side Intake Fan (200mm x 30mm)
3. Top Back Output Fan (200mm x 30mm), the Top Front Output Fan is optional and I don't have it.
4. Back Output Fan (140mm x 25mm)
I do not have the VGA holder installed as it didn't come with a fan either.
The cards are in the top 2 PCI-E slots of my motherboard (http://www.gigabyte.us/products/product-page.aspx?pid=4169). All fans are unobstructed and functional as far as I can tell.
My CPU cooler is a Hyper 212 EVO(http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099) and its blowing the hot air towards the front of the case and over the ram chips (and out the top of the case as heat rises).
Only things I can possibly do are install the optional 2nd top fan and maybe the VGA holder with a high speed fan...
Edit: I put the case side back on and my temps are DOWN compared to when the side was off... GPU1: 76C GPU2: 73C during Heaven benchmark at the factory overclock setting. Still nothing to write home about though... think the VGA holder / additional fans will help?
Also in case you care, my CPU is outputting about 82c worth of heat because of it's 4.6Ghz overclock at full Prime95 load.

With the Haf-X you'll definitely get better temps with the side on because of the side-panel fan. Usually when people have temperature problems it's because they don't have side-fans so i just tell them to remove the side of the case as preliminary troubleshooting step (before i know what case they have).

I would say swap the direction of your CPU fan so it's blowing towards the back of the case and straight out of the 140mm output fan. Technically heat rises, but that's only really relevant for passive cooling systems. Heat goes where you push it and the force of the fans FAR exceeds that of convection.

Move your top back output fan to the front top spot but reverse its direction to intake. This will put cold air right in front of your CPU's intake (and it will travel right over your RAM too) and then your CPU fan will blow air straight out the back Output fan. You should see a notable decrease in CPU temperature too because right now your CPU is starved of cold air (you currently have two exhaust fans near the CPU fan intake stealing its air)

Remove all of the PCI-E covers from your case. Now that we swapped that top fan to intake your case is going to have much higher positive pressure and increasing the rate that air can flow out of the PCI-E slots will help.

Keep your Side-panel fan as an intake fan for now. Run the same test you used before to measure temperatures and see if they're now at a more respectable level. If not, you can then try swapping the side-panel fan to output, re-run that same test and see if temps improve.

Let me know the result thumb.gif
Edited by SeanPoe - 6/30/12 at 10:17pm
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