ATI Radeon HD 4000 Series discussion

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06-17-2008, 04:32 AM
Macadamia

Quote:

Originally Posted by JohnZS

I hope that you are right Papu as it would really give Ati the edge. It has been a while since I had an ATi card so I am looking forward to returning to being back on the Red :p:

However a lot of people do not realise that the 4850 is in fact the RV770PRO which has 480SP and 24TMU. I am guessing that the RV770 4870 form which has the full 800SP and 48TMU.
Where did I get that from?

The Box blurb which was acidentally posted on Amazon.com

Any ideas when the NDA is going to be lifted and when the HD4870 (1GB DDR5) will be released?

I am still tempted by the Zotac AMP 700Mhz GTX 280, however if the HD4870 comes close (within 10%) and for 66% of the price... I will certainly buy the RADEON over the Geforce.

John

The Amazon specs are wrong. Both chips are the same deal, just different clocks.

I really recommend that you wait till the 4870X2, even though it's more expensive I'm really sure it's a heck of a card. :)
06-17-2008, 04:33 AM
emoners

Quote:

Originally Posted by Origin_Unknown

not too long to wait - i really want a pair of 4870's to replace my Gts640

same boat here...think it's time to retire my 8800GTX :D
06-17-2008, 04:33 AM
perkam

800SPs has already been confirmed due to TFlop numbers.

Now we wait for TMU confirmation.

Perkam
06-17-2008, 04:38 AM
AliG

I'm betting its 40 TMUs, the diagram looked legit and keeps the same ratio the r600 did, unless if that diagram is fake and ati is planning on doing 8 arrays of 20 shaders to get 8*4=32, imo its 40
06-17-2008, 04:41 AM
ownage

It seems R700 should be in available in 8 weeks, and there is no official name for it yet.

http://i27.tinypic.com/2r2c51k.jpg

http://i27.tinypic.com/14iomdf.jpg

http://pc.watch.impress.co.jp/docs/2008/0617/amd_12.jpg

http://pc.watch.impress.co.jp/docs/2008/0617/amd_01.jpg

http://img149.imageshack.us/img149/9564/amd14ap5.jpg
06-17-2008, 04:42 AM
y2kbos

A guy on a another forum has been saying that the HD4870 is basically as fast as HD3870X2 in games that scale well in Crossfire and faster in games that dont scale that well like Crysis.

Results he gave on the two most demanding games.

QX6850 @ 3.0ghz
4gb ddr3 1066
Vista Ultimate 64

Crysis Very High 1920 x 1200

GTX 280 34.2 fps, HD4870 26.9 fps

Lost Planet 1920 x 1200 4 x AA

GTX 280 38.7fps, HD4870 29.86 fps

Scores are good imo, especially if Crossfire scales well..
06-17-2008, 04:49 AM
XSAlliN

Finally some facts, R770 has only 160 SP which are capable of 5 operations per cycle (that's where they concluded the 800 SP). 40 TMU's should bring enough balance for this configuration.
06-17-2008, 04:49 AM
JohnZS

Quote:

Originally Posted by y2kbos

A guy on a another forum has been saying that the HD4870 is basically as fast as HD3870X2 in games that scale well in Crossfire and faster in games that dont scale that well like Crysis.

Results he gave on the two most demanding games.

QX6850 @ 3.0ghz
4gb ddr3 1066
Vista Ultimate 64

Crysis Very High 1920 x 1200

GTX 280 34.2 fps, HD4870 26.9 fps

Lost Planet 1920 x 1200 4 x AA

GTX 280 38.7fps, HD4870 29.86 fps

Scores are good imo, especially if Crossfire scales well..

That is pretty much what I am begining to expect, RV770Pro = 480SP. RV770XT = 800SP

I am hoping that the HD4870 leans more towards 9800GX2 performance than 9800GTX as I am looking to upgrade from a 8800GTS

pop two of those in and then you will be faster than G280GTX (if software supports Crossfire).

If the HD480X2 is going to be any good it better have 2GB of RAM or a vast new improved multiGPU technology otherwise it is going to be the same old problems which can effect the GX2 and HD3870X2's due to 512MB of RAM percore?

John
06-17-2008, 04:57 AM
informal

Quote:

Originally Posted by JohnZS

That is pretty much what I am begining to expect, RV770Pro = 480SP. RV770XT = 800SP

I am hoping that the HD4870 leans more towards 9800GX2 performance than 9800GTX as I am looking to upgrade from a 8800GTS

pop two of those in and then you will be faster than G280GTX (if software supports Crossfire).

If the HD480X2 is going to be any good it better have 2GB of RAM or a vast new improved multiGPU technology otherwise it is going to be the same old problems which can effect the GX2 and HD3870X2's due to 512MB of RAM percore?

John

You are very wrong.There is only one RV770 chip,and it has 800 Stream Processors or 160 shader processors with 5 stream pr. in them.
There is no 480 Sream proc. RV770 chip ,there never was.
To check this,you should look at Firestream 9250 thread in which AMD claims 1TF for basically Radeon 4850 with 1GB of frame buffer memory!One teraflop = 625Mhz x 2Flops x 800
06-17-2008, 05:09 AM
mascaras

Quote:

A detail look of PowerColor HD 4850 512MB GDDR3

http://img122.imageshack.us/img122/5...d485026nv5.jpg

http://img444.imageshack.us/img444/9...d485002ns0.jpg

http://en.expreview.com/2008/06/17/a...0-512mb-gddr3/

regards
06-17-2008, 05:09 AM
w0mbat

http://www.forumdeluxx.de/forum/showthread.php?t=500923
06-17-2008, 05:15 AM
Hornet331

hmm crossfire 4850 23fps in crysis very high 1920x1200 @ 4aa
06-17-2008, 05:18 AM
bedlamite

Well with 3 GHz Phenom.
Thats quite... fast?
06-17-2008, 05:22 AM
w0mbat

Way faster than GTX 280 and much cheaper :D
06-17-2008, 05:23 AM
Hornet331

cpu really doesn't matter at that res, it may hinders the min fps, but it only marginaly influences the avarage fps.

im still searchign for a review with 1920x1200 @ 4AA but i only can find some with 2AA right now -> 280GTX 28fps 260GTX 23fps
06-17-2008, 05:24 AM
y2kbos

Quote:

Originally Posted by bedlamite

Well with 3 GHz Phenom.
Thats quite... fast?

Similar to 9800gx2/ faster than 3870X2
06-17-2008, 05:25 AM
y2kbos

Quote:

Originally Posted by w0mbat

Way faster than GTX 280 and much cheaper :D

:down:

About the same, but will feel much much smoother with GTX 280
06-17-2008, 05:26 AM
Hornet331

ok for 280 gtx @4aa -> ~15-16fps
06-17-2008, 05:27 AM
Papu

:ROTF: really you've tried then?
06-17-2008, 05:27 AM
informal

Quote:

Originally Posted by y2kbos

:down:

About the same, but will feel much much smoother with GTX 280

You know this,how exactly?Did you try 4870X2 or 4850 CF yourself?
06-17-2008, 05:27 AM
w0mbat

9850@3GHz
4850 CF@default

CoJ@1920x1200@max@4xAA/16xAF
http://www.abload.de/thumb/coj_dx102008-06-1615x82.jpg
06-17-2008, 05:27 AM
Hornet331

Quote:

Originally Posted by y2kbos

:down:

About the same, but will feel much much smoother with GTX 280

indeed your right in the territory of micro stuttering. :yepp:

i hope oced 4870 gives you a boost up in the low 40s (i expect to much :p: )
06-17-2008, 05:29 AM
STaRGaZeR

Quote:

Originally Posted by XSAlliN

Finally some facts, R770 has only 160 SP which are capable of 5 operations per cycle (that's where they concluded the 800 SP). 40 TMU's should bring enough balance for this configuration.

The same balance of RV670. 320/16 = 800/40 in terms of proportion.
06-17-2008, 05:34 AM
y2kbos

Quote:

Originally Posted by informal

You know this,how exactly?Did you try 4870X2 or 4850 CF yourself?

No

Games are always smoother with a single card imo.

4870x2 might change that, but I doubt Ati has anything that complex ready.

Give me a 8800gtx over bit faster 2 x 9600gt anyday.
06-17-2008, 05:35 AM
w0mbat

R700 isnt the same as R680.

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