Im at 840 core clock and 2100 memspeed which is 4200. thanks

Here is a chart showing ocing 580's vs 480's
 http://www.bjorn3d.com/read.php?cID=1998&pageID=10132

is it safe to run those OC's on air or is it much better to be water cooled? What do you guys use to adjust the voltages on the 480s?

the point is that the 580 is a better OCer....
 
you can take your 480 to 850/1700 but if you OC the 580 it should go over 900mhz....
 
 

Apart from the features you can't adjust (like number of ROP's), if you match the shader fill rate and memory bandwidth, then that's a start.
 
Shader fill rate is the number of shaders times the shader frequency, i.e. 480 x 1500Mhz = 720,000 mega pixels per second
 
Memory bandwidth is the effective clock times the interface width divide by 8 bits per byte, i.e. 4Ghz x 384-bit / 8 = 192GB/s
 
Do the math yourself and don't obcesss over getting a certain frequency number if it doesn't happen.  Each graphics card is different and we're only gauranteed what we buy.
 
Note: If overclocking were truly safe, then we could just buy it that way instead of doing it ourselves, why go through the trouble?  In otherwords, it isn't, but rather a risk we benefit from in short-term.

480/60 =8, 512/64 =8, doesn't seem like the TMU's are independant from the number of parallel processors enabled, per se.  Don't know the details of the die, do you happen to know how ROP's are tied in if they are constant despite the number of shaders/TMU's?

i_c_the_light
I know that this is a stupidly old thread, but I'm still having a blast with my 480.
 
870/2025 @1.088v sitting around 65-70 under full load with a custom water setup. Severly limited by my PSU. Can't up the GPU without increasing the voltage. Increase the voltage and the PSU hits a cut out and shuts down the entire PC.

Wow, you really need to upgrade your PSU if it's running that close to the edge. My quad Haswell + 480 FTW Hydro system is around 350-400 watts, and that's with a MCP655 pump and 7 fans included. Even EVGA's own 500w PSU will run that kind of load without complaint.

I think that's only losing time.
Even with highest overclock you can't get more than 2-3 fps in new games.
Min fps will probably stay same. It's time for something newer. GTX970 FTW + Z97 FTW + i5-4670K example.
I hope EVGA will start to sell soon EVGA GTX970 SSC with Titan based cooler. There are lot of space for overclock and excellent for SLI because such setup will be stronger than Titan Black Successor.
 

wow, crazy to see people hitting such high clocks on the 480's. I have one in my work PC, and I wouldn't dare both touching the voltage being as I am on the stock cooler which hits 93C with any 3D Application, which leaves me around 800Mhz on the core w/o voltage increase.  I imagine a 480 at 850Mhz should come close to 580 performance for sure! That's a pretty impressive overclock really.

kougar

j2345912
wow, crazy to see people hitting such high clocks on the 480's. I have one in my work PC, and I wouldn't dare both touching the voltage being as I am on the stock cooler which hits 93C with any 3D Application, which leaves me around 800Mhz on the core w/o voltage increase.  I imagine a 480 at 850Mhz should come close to 580 performance for sure! That's a pretty impressive overclock really.

Pretty impressive your card is stable at 800Mhz at that high a temp! I have a 480 FTW hydro that just barely hits 800Mhz stable at stock vcore around 55c. I played with it at 1.2v and >900Mhz for awhile, and I don't remember what the temps were at to say, but the power consumption went through the roof. I just leave it at stock these days as I didn't feel the crazy power/heat increase was worth it. It's crazy to realize a Titan Black can fit inside the same power consumption level with some room to spare...

I was stable between 96-99 at closer to 850 on stock air.

Looks good
What about with 2 GTX460's