AMD Unveils ATI Radeon HD 4890, the Most Powerful Graphics Processor in the World

[Bjorn_Of_Iceland]

"the Most Powerful Graphics Processor in the World". Just like that movie entitled "Never Ending Story"

[Valdez]

Originally Posted by Mega-Japan

I will have a friend get one since he is upgrading his computer and I'll play with it then.

I will wait for the RV800 series instead, when it gets DX11 support and ATi finally gets a 512-bit bus :O

Ati already had 512bit bus before (hd2900xt/pro), but it is now unnecessary because of gddr5.

Originally Posted by Mega-Japan

I will have a friend get one since he is upgrading his computer and I'll play with it then.

I will wait for the RV800 series instead, when it gets DX11 support and ATi finally gets a 512-bit bus :O

512-bit, that's not gona happen, actually, i'd go as far as to say that we won't see any 512bit cards from nvidia OR ati for that mather, it's just too expensive to make such big GPU's (you need a lot of space for those pins you know).

[PCpraiser100]

Originally Posted by Mega-Japan

I will wait for the RV800 series instead, when it gets DX11 support and ATi finally gets a 512-bit bus :O

Thats what I am trying to do too. Why are we feasting off of the newest DX10.1 cards when DX11 is already in Win7 Beta and Model Shader 5.0 is expected to show up sometime at the end of the year?

[mdm-adph]

Originally Posted by GFC

512-bit, that's not gona happen, actually, i'd go as far as to say that we won't see any 512bit cards from nvidia OR ati for that mather, it's just too expensive to make such big GPU's (you need a lot of space for those pins you know).

Both have had them before (HD 2900/GTX200). Nvidia will probably stop using them when they pick up GDDR5, too, I betcha.

[zithe]

The TPU reviews show this card as being very promising. It's just barely faster, but it is. Dunno how far each does when both are OC'd to the max, though.

[EastCoasthandle]

So far, the main difference I found is that RV790 added de-coupling capacitors along the outer edge and reworked the ASIC. So is it a new chip? Physically, yes it is based on the improvements made but there is no logic design changes. You also have to take into account the changes to video card itself (different caps, mosfets, etc). And, (according to Firing Sqaud) that they added some 3 million transistors to the RV790. Still looking for more information.

[a_ump]

first true difference that i've read between the RV770 and RV790.

[$ReaPeR$]

in CF it is the most powerful gpu in the world today.. ill bet we'll see a 4890X2 very soon

[Wrigleyvillain]

Originally Posted by a_ump

first true difference that i've read between the RV770 and RV790.

ORLY?

http://www.hardwarecanucks.com/forum...review-22.html

[EastCoasthandle]

Originally Posted by Wrigleyvillain

ORLY?

http://www.hardwarecanucks.com/forum...review-22.html

I am not sure what point you are making with that pic but that won't be the end all be all of performance.
-------------------------------------------------------------(different thought)----------------------------------------------
Funny how W1z got a different score using crossfire. The results between a single card at 1000Mhz vs CF is only roughly 2000 mark difference even though 3D06 is cpu limited. More benchmarks about this would be interesting.


That review testbed:
Processor: Intel Core i7 920(ES) @ 4.0Ghz (Turbo Mode Enabled)
Memory: Corsair 3x2GB Dominator DDR3 1600Mhz
Motherboard: Gigabyte EX58-UD5
Cooling: CoolIT Boreas mTEC + Scythe Fan Controller
Disk Drive: Pioneer DVD Writer
Hard Drive: Western Digital Caviar Black 640GB
Power Supply: Corsair HX1000W
Monitor: Samsung 305T 30” widescreen LCD
OS: Windows Vista Ultimate x64 SP1
ATI 8.592.1 RC1 (HD 4890)

W1z's test bed
CPU: Intel Core i7 920 @ 3.8 GHz
(Bloomfield, 8192 KB Cache)
Motherboard: Gigabyte X58 Extreme
Memory: 2x 1024MB OCZ DDR3 Platinum @ 1140 MHz 6-6-6-19
Harddisk: WD Raptor 740ADFD 74 GB
Power Supply: BFG ES-800 800W
Software: Windows Vista SP1
ATI: Catalyst 9.1, HD 4890: 8.592.1

Hmm, I wonder if 64-bit OS is really needed...

[AltecV1]

Originally Posted by EastCoasthandle

I am not sure what point you are making with that pic but that won't be the end all be all of performance. Funny how W1z got a different score

WIZZARD dont no how do make magic(overclock)

[Wrigleyvillain]

Trying to make a point about the overclockabilty. Of some of them anyway. No not the 'end all be all', of course.

[DarkMatter]

Originally Posted by $ReaPeR$

in CF it is the most powerful gpu in the world today.. ill bet we'll see a 4890X2 very soon

GTX285 SLI??

[EastCoasthandle]

Originally Posted by Wrigleyvillain

Trying to make a point about the overclockabilty. Of some of them anyway. No not the 'end all be all', of course.

I see what you are saying.

[Wrigleyvillain]

Yeah it's interesting (strange?) that W1z couldn't get near the same clocks with either of his samples including another Sapphire.

[LittleLizard]

i read in fudzilla that 2 of those in cf are better than gtx 295. if thats is true, ati may have the best graphic combination but also gtx 285 in sli are better than gtx 295 (i think)

[nafets]

Originally Posted by Wrigleyvillain

Yeah it's interesting (strange?) that W1z couldn't get near the same clocks with either of his samples including another Sapphire.

Hardly strange at all. OC'ing ability is merely a "luck-of-the-draw" science.

It all depends on how stringent the manufacturers are with regards to chip binning. There's no guarantee that buying one brand over the other, or spending more money will get you a more OC'able video card.

In addition to that, I'd hardly base any value in the results achieved by reviewers in supposedly non-biased (impartial) video card reviews.

Once the cards reach the actual consumers hands, and we get first account feedback on OC'ing results, then you can make your judgements as to how well or not the cards perform outside of their factory set specifications...

[Mega-Japan]

Originally Posted by LittleLizard

i read in fudzilla that 2 of those in cf are better than gtx 295. if thats is true, ati may have the best graphic combination but also gtx 285 in sli are better than gtx 295 (i think)

Yes, because you have to believe everything you read in the interwebz
(no offense =P)

But yeah, it's true, 2 4890 in CrossFireX can indeed perform much better than a GTX295, but first, the application would have to be optimized for CrossFireX (otherwise it'd make no difference whether you're using 1 or 4 cards), and of course, 2 4890 would consume much power and produce more noise than a single 295, I would still go for it though, but who needs RV790 when RV800 is around the corner?

[EastCoasthandle]

Here is my only concern; will we be able to adjust vcore like we did with other cards up to the HD 2900XT? If yes, then that's a huge plus for me. The only card that I know of right now is the Asus version which comes with their own tweaker program. However, I can do this myself via CC's profile if it's allowed...

[Wrigleyvillain]

Originally Posted by nafets

OC'ing ability is merely a "luck-of-the-draw" science.

Well of course, anyone who has even a little overclocking experience is well aware of how YMMV. Guess just surprised as they were both Sapphire review samples.

[imperialreign]

Originally Posted by Wrigleyvillain

Well of course, anyone who has even a little overclocking experience is well aware of how YMMV. Guess just surprised as they were both Sapphire review samples.

hmmm . . . perhaps this is just my opinion, but does it seems like Sapphire has been slowly lowering their standards since the release of the HD2000 series? Probably just poor perception on my part . . .


Anyhow, these new 4890s look nice - but I don't see a reason to upgrade from a 4870. Nothing there necessitates the price/performance increase you'd garnish from that slight upgrade. Now, if the 4870 and 4890 will play nice together in Crossfire - of which, I'm betting they should considering the ability to match a 4850 with a 4870 - then, perhaps that might be a decent "upgrade" option if you have the extra room available.

Otherwise - it looks like a damn nice "revision" to the RV770 . . . if this is a mere foreshadowing of the RV800, it's time to put some savings aside for the HD5000 series

[nafets]

Originally Posted by EastCoasthandle

Here is my only concern; will we be able to adjust vcore like we did with other cards up to the HD 2900XT? If yes, then that's a huge plus for me. The only card that I know of right now is the Asus version which comes with their own tweaker program. However, I can do this myself via CC's profile if it's allowed...

The HD4890s use the same Volterra VRM controllers as the reference HD4870s, so I don't see why not.

It's possible it already/still works with Rivatuner and/or CCC profiles, in the same manner as it does currently with reference HD4870s.

Try and poke a few HD4890 owners to experiment with some software voltage testing...

[EastCoasthandle]

Originally Posted by nafets

The HD4890s use the same Volterra VRM controllers as the reference HD4870s, so I don't see why not.

It's possible it already/still works with Rivatuner and/or CCC profiles, in the same manner as it does currently with reference HD4870s.

Try and poke a few HD4890 owners to experiment with some software voltage testing...

The HD 4870 I currently have does not allow for vcore changes using CCC's profile. However, I was able to do this with earlier cards like the HD 2900XT, etc.

[a_ump]

Originally Posted by Wrigleyvillain

ORLY?

http://www.hardwarecanucks.com/forum...review-22.html

it comes with a higher stock clock so i knew it would overclock better lol that's not what i was meaning. I meant physical differences architecturally.