ATi Radeon HD 2900XT ... #2. diel (premenovany)

Ryko napísal:
crux2005 napísal:Okrem toho chybaju HD 2900XT vo viacerych hrach jednoducho fillrate-ty...
Presne ako hovoris... preto nedokazem pochopit, preco je jadro R600 v tomto smere tak poddimezovane... to si vyvojari s ATi neuvedomili takuto zakladnu vec...? ved ta karta ako by imho stale bezala so zatiahnutou rucnou brzdou...

R600 ma ~ 700 mil. tranzistorov - kazda Dalsia jednotka by stale Dalsie tranzistory - 80nm vyrobny proces je len half node - die shrink 90nm - TSMC nepotrebuje nove kniznice, parametre a pod. - ocividne neprinasa momentalne taku vyhodu, ako by sa dalo cakt voci 90nm. Okrem toho potrebuje R600 relativne vysoke frekvencie - 742MHz. Povodne mala bezat na este vyssej frekvencii. Na koniec sa v AMD/ATi rozhodli na kompromis - aby sa dala karta aj schladit a nemala az taku spotrebu-

Tesselator, ktory bude "povinny" az niekedy od D3D 11 zabral tiez dost vela tranzistorov. Su urcite hranice pokial sa da ist s poctom tranzistorov - aj z fyz. hladiska, ale aj aby sa dali dosahovat dobre Yields pri vyrobe - aby sa dalo co najviac cipov R600 vyrobit na jednom 300mm Wafery.

v ATi sa museli rozhodnut do coho "zainvestovat" tranzistory - uz dlhsiu dobu vidiet trend ATi - zameriavaju sa hlavne na aritmeticky vykon co je aj dobre, lenze ine fillraty nie su az na takej urovni ako pri G80. Teoreticky ma G80 aj vyssi aritmeticky vykon.

ani 475GFlop/s HD 2900XT nie je uplna pravda - do urcitej miery tu je podobnost s GeForce 8800GTX u ktorej sa uvadza 512 GFlop/s

ale minimalne od G80 (keD nie ovela skor) treba vidiet, ze tieto teoreticke peak hodnoty aritmetickeho vykonu su naozaj len cisla

---Diablo--- napísal:jedna vec je na akej urovni je/bude a druha za aku cenu sa bude predavat

HD 2600 budu stat:

od 99$ do 199$

mirke napísal:Crux2005: Kde zmizol tvoj link na Catalyst 7.5 beta? Nejako ho neviem najst.

postol som ho najprv na pctf - tu nebol este

- prosim: http://www.computerbase.de/downloads/tr ... lyst_beta/

podla userov HD 2900XT, ale nie je ich karta podporovana tymto ovladacom

Ryko napísal:Jo, ja som tiez cakal, ze Sapphire tam da ten vykonnejsi chladic, ktory bol prestaveny na viacerych weboch... ale bohuzel ma len referencny...

Inak uz ide do predaja verzia Toxic s vodnym chladenim, tam ale bude cena asi podstatne vyssia...

kartu, ktoru myslis este nebola vydana - HD 2900XT s tym chladicom od Sapphire

Ryko napísal:A stale mi vrta hlavou nizky pocet ROPs a TMUs...

zalezi ako pocitas TMUs a ROPs.

podla AMD/ATi ma R600 len 4 "TMUs" a 16 "ROPs" (nazyvaju ich RBEs = render back ends, iny nazov pre ROPs)

dexman napísal:nevidim moc do tohto, ale nejake porty z xboxu by som asi neoznacil ako "poriadne" DX10 benchmarky. k tomu by sa mohol vyjadrit crux ci je to kóser alebo nie. kiez by uz vyslo crysis demo

na "priadne" D3D 10 hry si este pockame (relativne) dost dlho

urcite, hra optimalizovana do urcitej miery na G80 - avsak G80 neprepada vykonom pod uroven HD 2900XT ani v CoJ

a pochybujem, ze prepadne v CoH

musime si este pockat na na ich finalne verzie hier
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co som videl LP, tak vobec ma nejak neocaril a ani nie je nejaka ukazkova hra co vsetko sa da dokazat s D3D 10

pre viac informacii, by som sa musel kuknut na LP blizsie

Xenon

Aka bude ta R670? Aky model? A ta 2600XT ma len 128-bit zbrenicu?

barco

... A to mame odkial vediet? R670 bude vydana v Q3/07, a bude mat pravdepodobne 256bit zbernicu... Viacej sa nevie.
A ano, X2600XT ma "len" 128bit zbernicu, ako aj ATi tak nVidia zistili, ze je pre nich ekonomickejsie vyrabat karty s vyssimi taktami, ale mnesiou zbernicou.

fobos

barco napísal:... A to mame odkial vediet? R670 bude vydana v Q3/07, a bude mat pravdepodobne 256bit zbernicu... Viacej sa nevie.
A ano, X2600XT ma "len" 128bit zbernicu, ako aj ATi tak nVidia zistili, ze je pre nich ekonomickejsie vyrabat karty s vyssimi taktami, ale mnesiou zbernicou.

Je to sice z Fudzilly ale snad nieco z toho bude pravda 8)

RV670 is HD 2900PRO

ATI has a few new 65 nanometre cards planned for Q3 2007. One of the most interesting ones is the RV670, a 65 nanometre mainstream core with 256 bit memory interface. This card is scheduled to replace the RV570 or Radeon X1950 PRO cards.

ATI will brand this one as the Radeon HD 2900 PRO and the card is based on the RV670 core manufactured at 65 nanometre. The card comes with 512 MB of memory and DAAMIT doesnt plan to introduce this card on the 14th, as it will wait till the card is ready.

We heard that it might be some showcase of beta cards at Computex. So if Nvidia launches a 256 bit version of G84, ATI will have something to fight it with.

---Diablo---

if Nvidia launches a 256 bit version of G84, ATI will have something to fight it with.

a ak nVidia nic take nevida a ATI hej tak by to mohlo byt pre nich navrat do obehu pevne v to verim :o

AMD R600 Architecture and GPU Analysis@Beyond3D
AMD / ATI Radeon HD2000-Serie Preview@hardtecs4u
AMD-ATI Radeon HD 2900 XT Performance Preview@firingsquad
Asus & Sapphire Radeon HD 2900XT@driverheaven
Artikel: ATI Radeon HD2900 XT@hardwareluxx

---Diablo---

ja to vidim tak ze ta karta ma velky potencial ale dako je neviuziti najskor uz boli nuteni tu kartu dat von aj ked je nedoladena snad to viriesia lebo sa stretavam s nazormi ze si ATi vykopala hrob... :roll:

<a href="http://anandtech.com/video/showdoc.aspx?i=2990">ATI HD 2900XT CrossFire: Intel 975X versus Intel P35</a>
<a href="http://xbitlabs.com/articles/video/disp ... e.html">HD 2000 Architecture Review</a>

KingP1n

---Diablo--- napísal:ja to vidim tak ze ta karta ma velky potencial ale dako je neviuziti najskor uz boli nuteni tu kartu dat von aj ked je nedoladena

Tiez s tym suhlasim, asi ju vydali skor aby mali zisk, aj ked by ju mohli este mesiac-dva doladovat. Za taky mesiac-dva to uz bude uplne ina karta co sa tyka vykonu ( podla mna ) , aj ked spotreba zostane stale rovnako vysoka

ATI Radeon HD 2900 XT@HardOCP
AMD's R600 has something of the flawed diamond about it@INQ
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starsie, ale predsa ...

Nvidia's FUD presentation revealed
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http://www.guru3d.com/article/Videocards/431/17/

Physics based particle water system - Physics done via geometry shader

Xenon

Teda pekne nakopala 8800GTX. :8O: Aspon shadery ma dobre.

Ryko

crux2005 napísal:Tesselator, ktory bude "povinny" az niekedy od D3D 11 zabral tiez dost vela tranzistorov.

Dobry priklad, naco davali R600 hardwarovu podporu na nieco, co imho vyuzije mozno 0,1% grafickych 3D enginov v blizkej buducnosti... ano je to velmi pekna featurka, ale imho zbytocna...

Xenon

Naco ten Tesselator je?

AMD explains Radeon HD 2900XT's poor AA performance

We asked Richard Huddy, Worldwide Developer Relations Manager of AMD's Graphics Products Group, to go into more detail about why the Radeon HD 2000-series architecture has been optimised for shader-based AA rather than traditional multi-sample AA. He told us that 'with the most recent generations of games we've seen an emphasis on shader complexity (mostly more maths) with less of the overall processing time spent on the final part of the rendering process which is "the AA resolve". The resolve still needs to happen, but it's becoming a smaller and smaller part of the overall load. Add to that the fact that HDR rendering requires a non-linear AA resolve and you can see that the old fashioned linear AA resolve hardware is becoming less and less significant.' Huddy also explained that traditional AA 'doesn't work correctly [in games with] HDR because pixel brightness is non-linear in HDR rendering.'

While many reviews of the HD 2900XT have made unflattering comparisons between it and Nvidia's GeForce 8800-series, Huddy was upbeat about AMD's new chip. 'Even at high resolutions, geometry aliasing is a growing problem that can only really be addressed by shader-based anti-aliasing. You'll see that there is a trend of reducing importance for the standard linear AA resolve operation, and growing importance for custom resolves and shader-based AA. For all these reasons we've focused our hardware efforts on shader horsepower rather than the older fixed-function operations. That's why we have so much more pure floating point horsepower in the HD 2900XT GPU than NVIDIA has in its 8800 cards... There's more value in a future-proof design such as ours because it focuses on problems of increasing importance, rather than on problems of diminishing importance."

Viac ...

to go into more detail about why the Radeon HD 2000-series architecture has been optimised for shader-based AA rather than traditional multi-sample AA.

v skratke povedane - pekne sa vyhovara

ale co ine mu uz ostava ?

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