[Nautilus]

Recently i bought a used ASUS ROG Matrix 5870 Platinium. For those who don't know it's a pre-overclocked edition card comes with 2GB of memory and has similar cooler to the ATI Batmobile but more efficient. It requires 2x8pin Pci-Express power cables.

After working on overclock for some time, i have managed to squeeze:
950 Core @ 1225mv
980 Core @ 1310mv
990 Core @ 1340mv
1000 Core @ 1410mv

1270 Mem @ 1800mv mem voltage

Now it's @ 1000Core and 1270mem:

So what do you think? Is too much or what?

Oh and have some feast:

 

[Redwoodz]

Nice one.We want benches!

 

[twich12]

i would have been all over that card if they made a block for it when i bought my 5870

 

[Nautilus]

Quote:

Originally Posted by Redwoodz Nice one.We want benches!

Done. But i don't think the results will be much different than 1GB standard 5870s overclocked to same clocks...

Quote:

Originally Posted by twich12 i would have been all over that card if they made a block for it when i bought my 5870

This card cries for cooler temps. Def. stock cooler is not ideal for 950Mhz+ overclocks. You could get this working stable @1000 with much lower voltage than mine using that DD block of yours.

 

[Maris]

very dangerous voltages

 

[dude guy bro]

i think 950 core @ 1225 is your sweet-spot

 

[Nautilus]

Quote:

Originally Posted by Maris very dangerous voltages

Yeah i know.

Will replace the TIM with OCZ Freeze can change the fan profile. Will see if it helps.

 

[Nautilus]

Nah the TIM and fan profile changes didn't help enough. The card still needs high voltage to work stable over 950Mhz.

So yeah my sweet spot is 950/1250:

The funny thing is, my reference design Powercolor 5870 1GB ran fine up to 1000/1300 with v1.250...This card is more expensive, has better cooling and all but still overclocks worse. Here's my luck for you.

EDIT: Maybe it's my PSU not supplying enough amparage. It only has 1x8pin and 1x6 pin PCI-Exp. power cables but card needs 2x8pin so what i did was using molex to PCI-Exp. power connectors to have another 8pin. Would it effect overclocking?

 

[L36]

I have the matrix as well. My old 5870 oced to 950 core on 1.064 volts and to 1010 core on 1.175.

These card OC like crap.
Note to self: Do not buy matrix cards, ever.
Oh, RMA one of them, the second is still a poor overclocker, cant even hold 1000 core with 1.35 volts.

 

[Nautilus]

Quote:

Originally Posted by L36 Oh, RMA one of them, the second is still a poor overclocker, cant even hold 1000 core with 1.35 volts.

Yeah you got my card there. LOL it's even worse! Mine is not stable at 1000 with 1.4 volts.

 

[L36]

Quote:

Originally Posted by Nautilus Yeah you got my card there. LOL it's even worse! Mine is not stable at 1000 with 1.4 volts.

I want the PCB blueprints to this card. This power circuitry is to blame here.