give me some starting values for overlclocking my GTX 470

[sunshinewelly]

I have taken delivery of a palit GTX 470 (which has a custom cooler).

Now i would like to overclock it a bit - not too much but at least some.

could someone give me some ideas of a safe overclock which can be done with basic air cooling

i understand that there are 3 values that an be altered on the cards.

cheers in advance

 

[NathWraith]

Any OC is safe on GFX, it is very rare you will break it unless you have volt modded the card.

I'd try 750MHz core clock.

 

[drunkenmaster]

I'd increase the speeds, decreasing them probably won't help


No idea what limits the 470/480gtx can hit in general to be honest, I'm under the impression well above stock 480gtx speeds are fine for both, in general cards with lower speeds will have reduced voltage to bring power down so you'd probably need to increase volts slightly to get a "good" overclock.

You can't really go too wrong with gpu overclocking, the only real issue is multiple reboots as you test max clocks and cause a few crashes. Normally a case of increasing core clock a little, testing it in a game, pushing further, with voltage go SLOWLY up and have something open you can alt/tab out of a game and watch the temps, the voltage isn't usually a big deal in as much as the highest something like afterburner will allow won't be dangerous, however it might be "dangerous" without enough cooling. So keep an eye on temps as you up the voltage and clock speeds and find something you're comftable with.

What I'd generally do is increase fan speed first to a noise level you deem appropriate for long term use, some people thats silent, others can whack it to full volume and not care. Then overclock as far as you can keep the temps in check at that noise level.

 

[Rroff]

On air with no voltage increase 750-775Mhz, 800Mhz w/ a little extra voltage (1.04-1.087)

 

[OLDPHART]

Just had a quick look at a couple of Palit D:Fan 470 reviews, you should be able to get 750[core clock] with out increasing the voltage, but if you can,t try your core voltage at 975mv, if its ok see how far you can increase the Core Clock. My 470 at 1000mv l can get 800/1600/2000, can't see why you can't reach that, performance will be close to a 480.

 

[ran_out]

I can't get much more than 700 core without voltage increase on my Asus 470 - maybe just unlucky?

I tried 750 for a while and even with increased volts it will be fine for maybe 2-3 hours gaming then will black screen or crash in some way depending on the game. So I've left it at 700 and it can still run pretty quiet this way.

 

[OLDPHART]

ran out > whats volts are you using, try 1025v to 1050mv and see how far you can overclock, try using MSI Aftureburner.

 

[sunshinewelly]

thanks everyone - think i will try 750 on the core and see whether it holds at that level.

what sort of % increase will that sort of rise give on overall performance etc

 

[Arcane]

750 should be fairly easy on stock voltage, it's 800+ where noise/good cooling starts to come into play.

 

[setter]

Ive set mine at 751 on the core, 1502 on the shader, havent touched the memory yet, (stock 1674mhz), stock voltage. Is it not possible to unlink the core and shader speeds on the 400 series? Havent clocked a card since my old gtx 280 almost a year ago.

 

[Rroff]

No not possible to unlink.

 

[setter]

Ahh i see, are you running the memory on yours at 2000 Rroff, and i take it a voltage increase is required for that sort of gain?

 

[Rroff]

Can't adjust VRAM voltage. Yeah mines at 2000Mhz - not all cards will do that tho infact a lot won't.

 

[setter]

Nice increase, a few of the overclocking guides ive read state that memory overclocking can be hit and miss, with memory not increasing much over stock, albeit a few of theese guides were using early sample cards.

 

[ran_out]

ran out > whats volts are you using...

Just tried 750 using 1025 & 1050 volts (using msi afterburner), after running occt with error check it will black screen after about 15-30secs. Tried Furmark also and same thing, it just goes to black screen - display goes off but all fans continue spinning.

 

[Rroff]

Nice increase, a few of the overclocking guides ive read state that memory overclocking can be hit and miss, with memory not increasing much over stock, albeit a few of theese guides were using early sample cards.

It doesn't really make huge odds performance wise in most stuff...

Memory OCing does seem a bit hit and miss tho - on the kinda values you can hit on air cooling upto 750MHz or so I could barely get any memory OC at all (heaven benchmark would spazz out almost immediatly) but once I got above 800MHz on the core I could go all the way to 2000MHz no sweat - properly tested... bit odd unless it uses some kinda divider/strap between memory and core.

 

[setter]

Cheers, im gonna try increasing the memory 10mhz at a time and test with a few games, is the heaven benchmark reccomended for testing as well?

 

[Rroff]

Not really it has enough small issues with texture flickering, etc. as it is lol.

 

[RavenXXX2]

Just leave my memory at stock, really no gains from clocking it.

1900 mem

2000 mem

 

[Rroff]

1900->2000 mem won't make much odds tho - 1674->2000 will have more of an effect tho its not huge.