580 & 590: What are reasonable OCs?

[zombie67]

Thought I would start a new thread, so people could find it easier, if they have these cards.

Anyway, I have a machine with a 580, and a machine with dual 590s.

For the 580, stock is 823, and I have it running at 850.

For the 590s, stock is 630mhz, and I have them running at 650. I think the amount of OC for the 590 is not just limited by the card, right? Something to do with the limitation of the PCI-e bus?

Again, I am not looking for bleeding edge speeds. Just something stable, but without leaving a lot of opportunity on the table.

[John P. Myers]

for the 580, you can run it the same speed as the 560 2win. the 590's though are limited by how much heat the VRAM can take since they aren't cooled by the fan because those chips are on the back of the card. If you were able to install the air duct with the 120mm in the HAF X to blow across the backs of the cards, you can easily get away with an OC of 756 MHz and *may* not have to adjust voltage to do this. But without that air duct blowing across the cards, the memory chips will get extremely hot to the touch (same applies if the 590s are water cooled). In that case, you can OC to 693MHz safely.

[zombie67]

I could never get that air duct to fit. So I have the 590s at 690 w/ no voltage change. And the 580 is is at 950, with the voltage up to 1050 from 1000. Thanks!

[spingadus]

When I OC'd my 590 I ran it for a while at 700 core clock, but then moved down to 680, where I felt more comfortable. From what I recall, Nvidia implemented overclocking protection (OCP) on the 590, so you can't actually OC past around 700 core and get much more out of it. You can set it past 700+, but OCP will quietly without you knowing it down regulate the card. I guess there were too many cards getting fried by OC'ing when they first came out.

[STE\/E]

I could never get that air duct to fit. So I have the 590s at 690 w/ no voltage change. And the 580 is is at 950, with the voltage up to 1050 from 1000. Thanks!

950 for the 580 ? don't think I've ever heard of anybody clocking one that high, I know none of mine (EVGA Superclock's) would hit that and be stable, if they did they'd probably be running at 100c Temp's ... From what I've read the Guy'z with the Liquid Cooled ones only run at 900 ... @-)

EDIT: Weird, Stock Voltage on my EVGA Superclocked 580's is 1088 already & the Core is @ 797 according to MSI Afterburner, one reason why I only run them @ 850 Core & 1100 Voltage, tried 875 for awhile when I 1'st got them but had to many errors ...

[zombie67]

950 for the 580 ? don't think I've ever heard of anybody clocking one that high, I know none of mine (EVGA Superclock's) would hit that and be stable, if they did they'd probably be running at 100c Temp's ... From what I've read the Guy'z with the Liquid Cooled ones only run at 900 ... @-)

EDIT: Weird, Stock Voltage on my EVGA Superclocked 580's is 1088 already & the Core is @ 797 according to MSI Afterburner, one reason why I only run them @ 850 Core & 1100 Voltage, tried 875 for awhile when I 1'st got them but had to many errors ...

Here it is. Temps look fine, right?

http://i1103.photobucket.com/albums/g461/zombie__67/card.gifhttp://i1103.photobucket.com/albums/g461/zombie__67/sensors.gif

[Fire$torm]

Here it is. Temps look fine, right?

Yeah, your temps are good and with a decent fan speed to boot.

[DrPop]

Man, Z - that is some awesome rig you've got there! :D Nice O/C with little strain on the card, too. :cool:

[STE\/E]

Here it is. Temps look fine, right?

http://i1103.photobucket.com/albums/g461/zombie__67/card.gifhttp://i1103.photobucket.com/albums/g461/zombie__67/sensors.gif

It looks okay but I still find it strange you can go that high, I checked all my 589 Box's (3 Dual) & they all show the stock Voltage @ 1.088 ... Mine show the Core Clock speed at 850 on the Main Page & the Sensor Page using GPU-Z unlike yours showing 405 on the Sensor page, were the Pic's taken with the Cards under load or Idle, mine still show 850 under either Load or Idle ...

I'm Going to the Movies now will be back later but let me know what Brand of Card they are & what Project are you running them at so I can compare Times. I'm not doubting you but like I said I haven't seen clock speeds that high on a air or liquid cooled 580 yet, you got some special cards there if they'll run that high ... :cool:

[John P. Myers]

At idle the MHz drops automatically to save power, so you'll always get a lower reading when the card is doing nothing. Though it seems an issue with windows combined with the nvidia driver causes the drop. To fix it, remove the driver and download a new one. That's the simple fix, though it may not always work. If that doesn't work, goto your global profile settings and set the power management mode to "Prefer Maximum Performance". This should help prevent the card from dropping into 2D mode. If it doesn't work, trying raising the voltage to 1.1. The card will throttle itself to prevent a crash when undervolted. And if that doesn't work, you may have to reinstall windows.

Edit: It may also help to drop the OC to 900MHz to help get the issue sorted out.

[STE\/E]

I think but not sure the 580's will automatically downclock if clocked to high too ...

[John P. Myers]

I think but not sure the 580's will automatically downclock if clocked to high too ...

Right and that's because of a lack of voltage. As long as it's being fed enough voltage to sustain the clock, it'll work. Was just checking what others had OC'd their 580s to, and many have gotten above 950MHz (usually saw 960 to 1015MHz) while also increasing the memory anywhere between 2000 to 2200MHz, which is just insane :p Of course it took 1.3+ volts to do it.

[STE\/E]

Well I'm not running mine at that much Voltage, there's a tremendous amount of more Watt usage the more you go over the Stock Voltage ...


Was just checking what others had OC'd their 580s to, and many have gotten above 950MHz (usually saw 960 to 1015MHz) while also increasing the memory anywhere between 2000 to 2200MHz

Running GPU Wu's or just running 3D Mark & such ... Mine wouldn't even run at those speeds let alone run GPU Wu's ...