Softmod zhen^wei. I think RivaTuner can increase its voltage. Volterra is the only one that makes digital PWMs anyway. Last time they showed that it needs 0.06 volts. Which results an increase from 970 MHz to 1 GHz.

so is it the same with any other reference 4890? coz I remember I've tried to increase the voltage in in 4870 bios using RBE, but the default voltage was already at its limit. so will all the reference 4890 have more voltage headroom like most nvidia GC?

Anyone can get Sapphire ATI Radeon 4890 to work with Windows 7 64bit?

mine din't work. all drivers failed on it

DAMN!

stil no have better driver work with hd4890. perhapd new ati driver coming soon.

Well Sapphire already listed HD4890 1GB in their HD4800 drivers list but the driver is not available for time being. Guess maybe in one week time it'll be available..

Hmmm, should I get a 4890 to crossfire 4870? I know it will downgrade 4890 but the price difference is so little. 4890 Might be cooler too.

hurm.. If I were you, I will sell my 4870 and buy another 4890. Just my 2 cents.

4890 CF is the way to go bro, besides, your silverstone op1000e is underutilized

This post has been edited by metsatsu: Apr 3 2009, 11:04 PM

I planned to crossfire before which is why it is underutilized. hehehe

yah speaking of seriously underutilizing your psu, afaik your single rail psu can support quad crossfire and sli bro... gto87 is right, just sell off your 4870 and get a 4890. then get another one for CF

HD4890 CF scale very well.

source

Bleh, I'd prefer adding another 4890 and put it as the first GPU before crossfire with my existing 4870. It's not like a huge boost selling my 4870 and buy 4890. 4890 is only 10% more performance comparing it to 4870.

can Corsair HX620 support 2x 4890? feel like buying 2nd 1 whn i go the $$

My idle temp for 4890 is

61'c Idle
74'c Load

is the idle normal ? i see websites review their idle all mostly 51'c


anyone that got Sapphire 4890 can give feedback on their temps? thanks!

so can i CF 4890 with Corsair HX620?

I'm having the same thought too. but no, i don't think u can.

Nope..I would say you need 800W PSU like Corsair TX750 or any equivalent..

YUpe it's perfectly normal for the card because the fan speed never goes above 32%. I also asked about the same problem before, You can refer to my previous post few pages back.

---

Added on April 4, 2009, 8:45 amHurm. Ok now, boosting your performance is one thing and getting it done w/out spending a lot of money is another thing.
Since 4870's price is dropping (and will drop again in future), I think it's better to sell off your GC now rather than later.


Anyway, I think 4890's price will drop again because Nvidia launched a better card at the same price.

This post has been edited by gto87: Apr 4 2009, 08:47 AM

GTX 275 vs 4890...woah *grabs popcorn* time 2 keep money while waiting 4 this 2 trading big punches with big bruises

well some reviews showed that 4890 pawn 275...
check techpowerup review...erm