AMD To Launch Radeon HD4890 "RV790" In April

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03-17-2009, 06:11 PM
ILikeCosmosS

4890x2 +4890 is my goal for tri fire ( i dont wanna pay extra money for a nf200 chip so i can get x16 x16 x16 lanes)

the looked priced very nicely
03-17-2009, 06:20 PM
Macadamia

Quote:

Originally Posted by BababooeyHTJ

Should I sell my GTX280 on April 5th? :shrug:

All depends on whether you wanna go xtreme OCs without the need for xtreme kewling.

If 1Ghz with adequate water is doable, it's really a nice achievement. I can see quite some people going for it here. :D
03-17-2009, 07:10 PM
Final8ty

Quote:

Originally Posted by LiquidReactor

Will there be two different versions of 4890x2?

AS in OC and Vanilla just like with 4890.

I hope not as that will most likely mean more waiting still for the OC version.

Sapphire! just bring out a maxed out 4890X2 4GB card & im happy :)
03-17-2009, 09:51 PM
largon

Quote:

Originally Posted by zerazax

Quote:

Originally Posted by SNiiPE_DoGG

just did some more side by side comparison and the gpu area of the 4890 looks markedly different than the 4870....

Yep it looks VERY different. The shader configuration is different

:up:

:eh: :hm:
03-17-2009, 10:29 PM
OBR

if send someone these coolalers drivers, i can test it and post results ...!
03-17-2009, 10:31 PM
largon

Hmmm...
Have I heard that before?
03-17-2009, 10:46 PM
zerazax

Quote:

Originally Posted by largon

:eh: :hm:

Check the pin configs for on the back of the 4870 (which lineup with how the ALUs are arranged on the RV770) with the 4890. The arrangement is definitely different, though it is blurry
03-17-2009, 10:51 PM
Eson

Déjà vu.
03-17-2009, 10:58 PM
largon

Didn't see this posted yet:
HD4890 listed in geizhals (euro pricewatch).

zerazax,
Errr...
You talking about that square'ish area of tiny SMD caps? They are so not related to the arrangement of the ALUs.
They are vDD/ground pads. The only thing it might mean, is the chip would consume less current as there's fewer power pads on the chip carrier.
03-18-2009, 12:29 AM
HKPolice

Quote:

Originally Posted by zerazax

Check the pin configs for on the back of the 4870 (which lineup with how the ALUs are arranged on the RV770) with the 4890. The arrangement is definitely different, though it is blurry

:rofl::ROTF::rofl:

I love how people speculate based on nothing. :clap: Good one!
03-18-2009, 01:03 AM
zerazax

Thanks largon, that makes a bit more sense but either way, they changed the GPU in one way or another

As for HKPolice, you could've posted like largon and reasoned it, but instead :rolleyes:

I'm not here to start a flame war, but if you ever wondered a lot of people dont take your rumors seriously in these threads, true or not, compared to people like w0mbat and other members, well your attitude certainly is one of them :down:
03-18-2009, 02:27 AM
blindbox

I'm just a noob so.. I'll let the pros do the talking. Here's some bigger pictures for comparisons. Found it posted on my local forum.

http://itbbs.pconline.com.cn/diy/993...l?aid=62547104

Wouldn't it be a good idea to put the photos up on the first post?
03-18-2009, 03:21 AM
LowRun

Quote:

Originally Posted by largon

Hmmm...
Have I heard that before?

Countless time, some people are just shameless :shakes:
03-18-2009, 03:23 AM
Frontl1ne

http://img8.imageshack.us/img8/6513/photo017p.jpg

Big image of my 4870 that I took on my phone camera.
03-18-2009, 03:36 AM
Macadamia

There already has been a Vantage score. Performance, GPU score 9801.

3DM06:

SM2.0: 6155
SM3.0: 7521
03-18-2009, 03:59 AM
ToTTenTranz

Quote:

Originally Posted by Macadamia

There already has been a Vantage score. Performance, GPU score 9801.

3DM06:

SM2.0: 6155
SM3.0: 7521

That looks like the same score as a vanilla HD4870..
I sure hope that's not a real score, or that it was taken with a weak setup.
03-18-2009, 04:03 AM
Macadamia

i7 at 2.66. 3D06's SM 2.0 and 3.0 are much more sensitive to single threaded performance (especially clockspeed) IIRC.
03-18-2009, 04:13 AM
Iconyu

Quote:

Originally Posted by blindbox

I'm just a noob so.. I'll let the pros do the talking. Here's some bigger pictures for comparisons. Found it posted on my local forum.

http://itbbs.pconline.com.cn/diy/993...l?aid=62547104

Wouldn't it be a good idea to put the photos up on the first post?

No, if people read that far they'll be rewarded, if they can't be bothered then that's just life.
03-18-2009, 06:27 AM
SNiiPE_DoGG

4890 center resistors: 4x11

4870 center resistors: 6x12

that said the entire resistor arrangement outside the center of the GPU area is %100 different between the 4870 and 4890. I find it hard to believe all that change is for power consumption alone....

Is it possible they are hiding 40nm from us?
03-18-2009, 06:38 AM
SNiiPE_DoGG

well purely area wise (resistors behind the gpu) there is a really significant size difference...

the 4890 is 44 units and the 4870 is 72units

.72(ratio 40:55nm) --> .61(ratio 4890:4870)
03-18-2009, 06:40 AM
largon

Quote:

Originally Posted by SNiiPE_DoGG

4890 center resistors: 4x11
4870 center resistors: 6x12

that said the entire resistor arrangement outside the center of the GPU area is %100 different between the 4870 and 4890. I find it hard to believe all that change is for power consumption alone....

Quote:

Originally Posted by SNiiPE_DoGG

well purely area wise (resistors behind the gpu) there is a really significant size difference...

the 4890 is 44 units and the 4870 is 72units

.72(ratio 40:55nm) --> .61(ratio 4890:4870)

Considering the backside of a HD4850 looks nothing like HD4870's it is safe to declare those CAPACITORS and their oh so suspicious alignment, shady layout and undeably far-fetched relation to process size mean absolutely nothing.
03-18-2009, 06:41 AM
SNiiPE_DoGG

Quote:

Originally Posted by largon

Considering the backside of a HD4850 looks nothing like HD4870's it is safe to declare those CAPACITORS and their oh so suspicious alignment and shady layout mean absolutely nothing.

those are resistors.... dont take things so seriously, weve got nothing else to work with so I'm just trying to posit possible differences
03-18-2009, 06:43 AM
largon

Since when have they started to mark resistors with a "C", instead of a "R" on the silkscreen?
:stick:
03-18-2009, 06:44 AM
JohnJohn

By FUDO

Quote:

Faster clock to clock than the RV770

We’ve heard that ATI's secret weapon with RV790 is not actually the higher clock speed, but rather improved shader efficiency, which enables it to do things a bit faster than a RV770.

This would mean that the RV790, Radeon HD 4890 card should end up faster compared at the same clock and specification to HD 4870 card.

We are not sure what ATI did to its shaders, but this is the reason why RV790 chips are actually differ from the RV770, and that the pin count is not the same. The release day should be April 6th.

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