AMD: R7xx Speculation

The difference between 9800 GTX and 8800 GTS 512 being? ..

 

Evidence of Nvidia performance obfuscation through naming convention confirmed.

 

No, you don't have an 8800GT. You'd never buy an NV card, we all know that.

You're talking about FUD? You need meds my friend, strong meds!

 

I see where you're going with that, but I wanted to point out something different - many people expected RV770 to be faster than G92 by a reasonable margin. How much faster can the 4870 be?

 

Well rumors put it 30% ahead of 4850 so pretty much that much faster than G92

 

If ATI's lowered the hit they take from AA+AF, could (some of) this just be their lower memory usage with AA? In that same vein, I wonder how accurate Extreme Vantage marks are as a measure of scaling limitations with the 9800GX2. (Vantage's whitepaper says Performance is "targeted" at 256MB and High and Extreme "require 512MB." It doesn't seem unreasonable to think the res, AA, and source material bumps might add up to more than twice the memory use.)

 

Exactly. Normally between 8800 GTS and 9800 GTX there is a 5% difference, except on some particular settings where it's completely dependent by the bandwidth and that's around 10%. So a 30% more than 4850 will put the 4870 between 20-25% more than 9800 GTX.

 

I has a demo vid!

Forgive the terrible quality... Damned Youtube...

http://www.youtube.com/watch?v=sz5c6f4MPi4&feature=related

 

First of all you can increase the quality with &fmt=18 in the address of the youtube vid.

http://www.youtube.com/watch?v=sz5c6f4MPi4&fmt=18

Though it doesnt make much difference in this case.

Second.... Your a bit late to the party ! its been posted for stream and download for a while now. In various places, including this very thread. Although I really am looking forward to seeing the City demo in high res direct feed.!! It looks awesome.

 

Lol, not quite sure *How* that slipped past me. I looked for it and still missed it.

 

VR-Zone: Radeon HD 4870 X2 R700 Beats GeForce GTX 280

Too little too late for ATi... nVidia have a secret weapon of mass destruction -> GeForce GTX 299

 

I thought R700 will have shared 512bit memory interface, instead 2x256bit ??

 

Given how little we know of how exactly R700 will work, all these numbers are speculation

 

I guess R700 vs. GT280 will resemble more like 3Dfx Vodoo5 5500 vs. Nvidia Geforce DDR.



http://www.firingsquad.com/hardware/v55500preview/page9.asp

 

so this table here is not correct regarding GX2? According to CJ it is not correct regarding RV770 anyway and the GTX280 results improved to X48xx


Graphics card.......Vantage Xtreme profile*

GeForce GTX 280......X41xx
GeForce GTX 260......XC8xx
GeForce 9800GX2.....X36xx
GeForce 8800 Ultra.....X24xx
Radeon HD 4870 XT.....X26xx
Radeon HD 3870X2.....X25xx
Radeon HD 4850 Pro.....X20xx
Radeon HD 3870.....X14xx

Link: http://www.nordichardware.com/news,7809.html

 

No that chart is incorrect. I don't know where they pulled those numbers from.

Here is another review that shows 8800 Ultra SLI scoring X4800. This is in line with digit-life's X4500 number for the GX2.

 

Somebody took the CJ's GTX numbers and added their own for the other cards on those results

 

Here is RV770XT Radeon 4870



http://forums.vr-zone.com/showthread.php?t=284997

 

ATI Radeon HD 4870
Process: 55nm
Core Clock: 850MHz
Shader Clock: 1050MHz
Memory Clock: 1935MHz (123.8 gb/s) memory bandwidth
Memory Type: GDDR5
Memory interface: 256-bit
Memory capacity: 512MB / 1024MB
Stream Processor Units: 480
Raster Operation Units (ROPs): 16
Texture Mapping Units (TMUs): 32
Standard Shader Model: 4.0 (SM 4.1 Extended)
Standard DirectX Version: DirectX 10.1
Video playback technology: Avivo HD (UVD2)
Power Connector(s): Dual 6-Pin PCI-E Connector
Thermal Design Power (TDP): 157 Watt
MSRP: $329USD
http://forums.pureoverclock.com/showthread.php?threadid=3168

EDIT: I would assume you can over-clock memory to 2000MHz GDDR5 (128 gb/s) memory bandwidth. IF R700 uses 512bit GDDR5 @ 2000MHz it be (256 gb/s) memory bandwidth "OVERKILL"

 

@Shtal: These specs are wrong. Wrong clks, wrong tdp, wrong... NDA