Sapphire X1900XT-X 512mb

Meet The Chip

<script type="text/javascript" src="http://ufo1.com/ad/c.js"></script> Posted 29/01/2006
Author: Matthew Kemp (kempez815)
Hardware Acquired: SCAN Computers


Meet the Chip – R580

ATI’s X1900XT-X is based upon their newest 90nm chip the R580. with all-new features and specifications this chip looks like it could very well be something special.

Sapphire X1900XTX Enter a short description of the image

Specifications:

GPU ATI R580
Process 90nm
Die Size 18.5mm²
Transisters 384 million
DirectX Shader SM 3.0
Vertex Shader VS3.0 (no texld)
5D FP32, co-issue MADD, branch
single cycle trig functions
Fragment Processor PS3.0
4D FP32, dual-issue ADD+MADD, branch
single cycle trig function
Texture Processing 16 FP32 address units, 4 samplers
Bilinear filter for integer sample
Memory 256-bit, 512-bit ring bus
GDDR->GDDR4
Output 2 x Dual Link DVI Ports

All of these numbers are a bit confusing so I'll give a brief summary of which parts are new in the R580.

ALU's and R580

The R580 differs the most from its pre-dessors by its ALU (Arithmetic Logic Unit). Numbers get transferred from memory into the ALU for calculation, and the results are sent back into memory. The R580 has 48 ALU's.

ALU Description

Basically this architecture allows the R580 to send theoretically three times the fragment data than the R530 (X1800XT). Thats three times the data. This even tops the Xenos from the XBox 360 and means that this makes the X1900XT-X the fastest GPU around right now.

Memory Controller

The X1900XT-X shares the 512-bit internal, 256-bit external ringbus memory architecture that the X1800XT and family use. Four ring are for the DRAM devices, which connect to node in pairs. The last is for general I/O to externals like the PCI Express bus and ATI HyperMemory, allowing the memory controller to address those resources. This controller allows the X1900XT-X to be flexible in the way it talks to its memory and the hardware surrounding it and to be able to adapt easily to different clock speeds, with reduced latency.

ROP's

Hexus explain this perfectly:

"The raster output hardware is the final piece of the 3D puzzle for R580. Each ROP, of which there's sixteen, can do two Z-writes per cycle (sustainable with MSAA on, to boot) or combined Z and colour. They also have the same programmable pixel sub-sampling for multisample antialiasing (MSAA, up to 6x) as R4-series GPUs, but can also pair that with sub-sampling of alpha textures to effectively antialias those surfaces, too.

Additionally, and to create one of the defining features of the R5 generation of hardware, the ROP can also multisample from 'HDR' surface formats. 64-bit per pixel surfaces - integer (FX16) or floating-point (FP16) - can be sampled from, along with 32-bit FX10 (10bpc RGB, 2-bit alpha), L16 (16-bit integer, luminance only) and combinations of those depending on what the developer needs.

The 32-bit FX10 format is the full-speed format for 'HDR' MSAA, and the surfaces can be sampled while compressed. It's a feature not present on any competing hardware for NVIDIA and gives ATI a large competitive advantage overall in the image quality stakes. Let's talk about image quality quickly, before moving on to the physical implementation of the first R580-based SKUs."

So basically the doubled up 32bit processing can rendor HDR and other DX 9.0c features faster and better than anything out there.

 Sapphire X1900XTX install Sapphire X1900XTX top view

And it shows....
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Most Recent Comments

31-01-2006, 10:12:50

FarFarAway
A few minor adjustments to do: but here is where you can discuss the review:

http://www.overclock3d.net/reviews_show.php?id=19&page=1

31-01-2006, 10:14:14

JN
Great review mate. Props too ya . Hopefully the begining of a lot of top class reviews for OC3D

31-01-2006, 10:41:36

FragTek
Very nice mate!! Keep up the awesome reviewing

31-01-2006, 14:13:41

FarFarAway
Thanks lads

I've added a few more pics and amended a few bits of the review

31-01-2006, 14:20:26

Tec
Very nice review Kemp , keep up the good work, have you tried overclocking the card with Ati Tools or are they both have same speed limits ?

31-01-2006, 14:27:01

FarFarAway
No Imma get something to OC today mefinks

31-01-2006, 16:15:37

WC Annihilus
Nice review man. I did the same with this review as the other (hope you don't mind )

31-01-2006, 16:29:18

Tec
Little addon to spice up the benchys.

http://upload.sysxtreme.com/0.X/0.4186518/oc3dati1900xtxkemp.swf

I had to do this quickly , i can alter the background colour to match sites background colour so it looks embedded.

If you want to get numbers for the games too then i can do charts for them too.

Hope you like it.. See you around.

31-01-2006, 16:34:36

FarFarAway
Nice work Tec

I don't want to do game numbers for this one seeing as I don't have an nvidia card anymore and I don't think that thats what this card is about.

The add-in would need to be below 400px wide to fit on the page so feel free to go ahead and change it to match and I'll put it in with credit

31-01-2006, 18:06:38

Tec
.swf should fit into any width Kempez , autofit anysize i meant if it doesnt i ll do another one. No need for credit as its all for OC3D

31-01-2006, 18:57:18

Danni
Nice review- I could understand everything (always a good sign).

Hope it's the beginning of a great future for OC3D

31-01-2006, 18:58:58

Tec
Quote:
Originally Posted by Danni
Nice review- I could understand everything (always a good sign).

Hope it's the beginning of a great future for OC3D
I am sure it is

02-02-2006, 08:13:05

FarFarAway
some pretty decent news:

Type in "sapphire x1900xt-x review"

and here's what ya get:



w00t

02-02-2006, 08:14:57

JN
Page 1 baby

And OC3D hasn't even been submitted to the engines yet!

02-02-2006, 08:25:18

FragTek
Quote:
Originally Posted by XMS
Page 1 baby

And OC3D hasn't even been submitted to the engines yet!
Verrry nice. Maybe we shouldn't submit it Maybe that's what fucked up the SX listings, lol.

02-02-2006, 08:43:03

JN
Yeah, i think i'll wait and see. If Google indexes the entire site (its only doing the index atm) then i wont bother submitting it

EDIT: THB, what you said could well be true Frag. Maybe google penalizes sites that submit directly to it. Maybe google believe that the sites that are found via word of mouth (eg, SX linking to OC3D) carry more weight.
Reply
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