It's actually depends on the driver for the HD4890 to shine. I'm not sure that there will be a huge difference but for sure the difference will be something to talk about. If after the Driver release the HD4890 still doesn't shine then just wait for another price slash.

awww...dang it! cant CF4890 with HX620 ...=-=

CF 4890 need how much watt psu

I'd say 600W minimum. Each card is an extra 20 watts after all.

so is HX620 enuf to power a single 4890?

4890 cooler than 4870. load temp 70-75C only.

real? u are compare hd4890 default cooler with hd4870 non reference cooler ?

dis is b coz there bit different for the reference cooler.

4870 heatsink uses 2 8mm heat pipe, where 4890 uses 1 8mm & 2x6mm, total 3.
in terms of fan speed, for the 4890 bios, ATI adjust it sightly higher den 4870, dats y it is cooler & noisier.

apparently HX620 can also power a GTX295, I saw this from another forum. but i won't bet it on 4890 CF though

Better get a 750w true power for CＦ 4890. More room for your future upgrade

a latest review from guru3d said that oc'ing this card will perform almost on par with gtx280..that's good result already, comparing the price

off topic:
anyone know when will the hd4770 or hd4750 come out?
don knw wanna wait for it or take a hd4830 now.. haiz...

@zhen wei..
u know wen will it released?? or it's jus a rumour??

em. just wait for it. about 3weeks from now.

Any proof for that? Guru3d shows that(by comparing two reviews, though the other review uses a different setup) 4870 and 4890 noise level is pretty much the same. Plus, a slight increase in fan speed and an extra heat pipe can't explain for a 20~25C drop in chip temperature. It's the chip itself. Check the slides about the chip .


Here's a noise table. This one uses the same setup for all cards.
http://www.xbitlabs.com/articles/video/dis...90_6.html#sect0

This post has been edited by blindbox: Apr 5 2009, 12:54 AM

afterall its a new chip so it might have heat solutions? anyway its a new chip ok?

http://www.hardwarecanucks.com/forum/hardw...b-review-8.html

bit different wit heatsink.

http://www.techpowerup.com/reviews/Sapphire/HD_4890/28.html

of coz, the bios fan speed can be tune by different manufacture, but the default bios by ATI, which use on sapphire, is quite noisy.

u can argue, yeah, may b the chip has improvement as well, but i'm sure ATI change the heatsink & fan speed for some reason as well.

The point is, the noise level is the same. 4890 is as noisy(or as quiet) as 4870. I wasn't talking about your heatsink statement, I was talking about the noise. My fault for not cutting off the other parts except for the bolded part I guess.

yes, i know.

modified heatsink = better heat dissipation

heatsink + fan speed + tweak chip = temperature improvement
may b all the factors contributes together & ended up as a cooler card.

i did not rule out dat new chip improves temperature condition, & u also shouldn't rule out dat new heatsink and fan speed tweak as well.
as i pointed out earlier, i'm sure ATI does the minor tweak for some reasons.

I saw goldfries reviews his Asus Tri-Fan HD4870x2 using Gigabyte Odin GT 550W
If i didnt see wrong.

This post has been edited by 168257061: Apr 5 2009, 05:46 PM

Well, the main argument was about how you're mistaken with the noise level, not temperature improvements(though I did mention about it).

Again, fan speed isn't the cause for the extra 20~25C cooling, so I fix that up for ya.