Overclocking 4850s, especially with a nice fat dual slot cooler...

[dug777]

I think it's going to be hard to beat the 4850 for sheer fps/$, so that I'll probably end up with, but I'd love to know how well they oc?

What's the nV equivalent? 9800GTX?

 

[Sylvanas]

Most OC to 700mhz no prob, beyond that it is hit or miss- a custom cooled design will stand you in better stead however.

 

[Sentry2]

Grab one(4850) with a decent cooler on it, flash it, and never look back. Stock vgpu is around 1.15v. You can actually get up to ~ 1.26v with a modded bios(on any reference card...pretty sure anyway). At those volts you *should* be able to hit between 750 to 800MHz. Anything higher will require a "hard" vmod.

I had a pair of Powercolor 4850's @ ~ 1.5v with MCW60R's on them clocked @ 950MHz.

This Palit 4870X2 I picked up does 870MHz on STOCK volts... :Q {DD-4870X2 block)
Can't wait to see what it can do with a little help

 

[geoffry]

Originally posted by: Sentry2
Grab one(4850) with a decent cooler on it, flash it, and never look back. Stock vgpu is around 1.15v. You can actually get up to ~ 1.26v with a modded bios(on any reference card...pretty sure anyway). At those volts you *should* be able to hit between 750 to 800MHz. Anything higher will require a "hard" vmod.

I had a pair of Powercolor 4850's @ ~ 1.5v with MCW60R's on them clocked @ 950MHz.

This Palit 4870X2 I picked up does 870MHz on STOCK volts... :Q {DD-4870X2 block)
Can't wait to see what it can do with a little help

How much of a boost in performance did you see? I thought I saw a review of an OCed 4850 with the core at 680ish and the memory I forget maybe 10% over stock and the increase was pretty much 1-2 fps in games, that made me not look too hard into extreme overclocking for my card.

 

[dug777]

Would be interested to know too

 

[dug777]

Nobody?

 

[error8]

Go for a volt mod. It's very easy to do and people are hitting in excess of 900 mhz for the core.
You wont get to much over 700 mhz without a volt mod, no matter how low the temperature is.

Check this thread here: http://www.xtremesystems.org/f...ad.php?t=190990&page=6

Of course, not everyone is into volt modding, but this card just asks for one.