NVIDIA GeForce 8800GTX/GTS

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Původně odeslal Semik

512 zdielaných VRAM aj RAM, takže tiež nemožno použiť všetko.

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Vse ne, ale diky architekture X360 je treba si uvedomit, ze hodne dat, ktere jsou na PC duplikovane (napr pozice vertexu nebo vubec schema modelu) jsou na konzoli sdilene. Tim chci rict, ze na PC ty data musis mit v RAMce a v pripade potreby je nahodis do VRAM a tim je duplikujes a zabiraji misto i v RAM i VRAM. Na X360 tim muzes hodne usetrit. Proto sem psal, ze v realu je na PC pro X360 hru potreba mit aspon 1GB RAM (zapocitavat je treba i OS a backround aplikace) a 512 VRAM.

Random slowdown bug plagues GeForce 8800 cards

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We decided to contact Nvidia about the issue, and Nvidia Technical Marketing Director Nick Stam has now gotten back to us with the following message:

Sorry for delay, took a while to gather info.

We are aware of this issue and our driver team is working on it now.

We expect a fix some time in July.

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http://www.techreport.com/onearticle.x/12877

Zajimalo by me, jestli pak uverejni v cem byl problem, protoze ja jsem se s tim napriklad vubec nesetkal.

More data on the GeForce 8800 random slowdown bug

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Yesterday the good folks at The Tech Report reported on an issue affecting a good chunk of GeForce 8800 users, where 3D graphics performance would fall into the toilet at random and wouldn't come back until you restarted the game or tabbed out and back in.

NVIDIA got back to them and said it was a driver issue and that the driver team were working on a fix. Not enough info, Nick! So we did a bit of poking and it turns out to be caused by texture eviction from device memory. Textures aren't being evicted when they should be, causing a loss of available device memory for other resources.

So it stands to reason that if you restart the app or tab out and back in, both of which reset the device which causes a VRAM flush, you'll be good to go again. It's somewhat application dependent and depends on how the app does surface management, but a general fix should be possible for all but the most misbehaved programs.

We're not sure the fix will make it in to a driver this month, as TR noted yesterday, but fingers crossed.

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http://www.beyond3d.com/content/news/349

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Původně odeslal Haste

Uprimne nechapu lidi, kteri si koupi 320MB verzi 8800. Zivotnost te karty je tim neuveritelne omezena...

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Naprosto souhlasím. Je to stejné, jako dkyž si lidi před pár lety kupovali "levnou" 128MB verzi GeForce 6800GT a za pár měsíců litovali, že si nepřiplatili těch dvanáct stovek navíc, protože v nových hrách kvůli nedostatku paměti padal framerate i na polovinu toho, co s 256MB verzí.

A když jsou již nyní na trhu hry, kterým 320MB nestačí (a tím nemyslím jen, že se textury nevejdou do grafické paměti, ale tahají se z RAM, ale i takový DiRT, který se při nastavení vyšších detailů kvůli nedostatku paměti odmítne spustit úplně) považuju 320MB GTS opravdu za nevhodnou investici. GTS-640MB se z tohoto hlediska vyplatí mnohem víc.

Já bych také souhlasil a také jsem koupil 640MB, ale myslím si, že ještě dlouho 320MB stačit bude. A před pár měsíci to byl super kup za super kačky a pořád jím je. Až jí bude docházet dech, tak už bude na pultech 9 řada. ;)

On jí právě dech dochází už teď, devítková řada nebude dřív než koncem roku a ne každý si může dovolit každý půlrok dávat za grafickou kartu 8000Kč (což, mám dojem, GTS-320 při vydání stála)...

G8x vs R6xx in Rightmark3D 2.0

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Conclusion on synthetic tests So debut of RightMark3D 2.0 for research on the site was held. Tests in a touch almost all aspects of innovation in Direct3D 10, they flexibly configured, allowing us to assess the relative performance of all the lines of Direct3D 10 chips from AMD and NVIDIA.

Both unified architecture of these companies have shown in our new Direct3D 10 tests is good, big failures were not found, except for a couple of cases with obvious errors in the drivers AMD.

Both family : R6xx G8x and high performance computing and texture, they are good at the complex components of all types. Taking the results in general, the decisions NVIDIA have certain advantages over the competition from AMD, for the moment, are ahead of their video, in most cases. But in some AMD chips tests showed better results, such as complex geometry tests and pixel shaders.

The advantage of AMD chips in such tests with increasing load even growing. So the outcome of the battle of DirectX 10 games has not been determined, it is rather difficult to say which of his rivals to win. It can only be assumed that there will be similar to our results in the majority of applications R6xx and G8x be close to each other would lead to some solutions on the basis of the company NVIDIA, AMD others. And this will depend largely on developers and their methods and algorithms.

Tests pixel shaders 4.0 showed that multiple texture with a relatively small sample loading ALU better job video NVIDIA. Solutions AMD, in turn, ahead of competitors in the computer tests pixel shaders. In one video card based on chip architecture R6xx showed very good results and ahead of competitors from NVIDIA operation and the situation in the second test is not yet clear because of errors in the drivers.

As we have noted, tests geometry and vertex shaders give different results, some leading solutions NVIDIA, AMD others. Because of the growing complexity of the work to go forward geometric Shader video AMD, it can be assumed that the applications with the extensive use of geometric shaders, if any in the near future, will lead the company's chips.

The last couple of tests RightMark3D 2.0-speed tests on the sample texture of vertex shaders. The figures shown in the results clearly indicate that the video card based on NVIDIA chips G8x perform our tests texture samples from vertex shaders faster than solutions based on the AMD architecture R6xx. This is different from the traditional balance between texture and computing chips from two competing companies. "whittle down" the number sheydernyh blocks and blocks TMU ROP quite hitting decisions middle and lower levels, greatly reducing their productivity.

Low card behind the masthead of times, the best of mid-end 2-3 times (on HD 2900 XT and GeForce 8800 GTS), and low-end further to 4-8 times. As evidenced by the results of game tests, has only Direct3D 9. Judging from the reactions we have results, the drivers for Vista AMD clearly worse refined than the drivers NVIDIA.

If the second company's products in our tests, no errors have been found, the decisions of AMD were two distinct issues : the rest of the line chips in the second "test" computer pixel shaders ( "Fire") and the head of the 2900 XT HD solutions in the most difficult test mode, the speed of the sample texture vertex shaders "Earth". It would like to believe that these shortcomings will be addressed in the next version of CATALYST drivers.

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http://www.ixbt.com/video3/rightmark2.shtml

Prelozeno pomoci google, ale casem se urcite objevi anglicka verze celeho clanku.

ty testy jsou dělané ještě ze starýma ovladačema u obou karet, u ATI s posledníma co vyšly je nárůst 1-40 procent, záleží na testu.

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Původně odeslal Spajdr

ty testy jsou dělané ještě ze starýma ovladačema u obou karet, u ATI s posledníma co vyšly je nárůst 1-40 procent, záleží na testu.

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No zda se, ze tady se na to podivali s novou verzi ovladacu na obou stranach i kdyz vysledky jsou uvedene jen z par testu. Nejak dukladne jsem to neprohlizel, ale nevypada to, ze by se situace nejak podstatne zlepsila.

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Původně odeslal Spajdr

ty testy jsou dělané ještě ze starýma ovladačema u obou karet, u ATI s posledníma co vyšly je nárůst 1-40 procent, záleží na testu.

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Dell tlaci na ATi at udela poradne ovladace na Linux, tak treba to pochopi a udelaji konecne uz poradne ovladace i pro Windows ... :-)

Je to super firma, ale software delat neumi a nikdy neumeli....

svaca: Software nedělá firma, ale lidi. A konkrétně z větší části tentýž driver tým, který dělal před lety v nVidii "slavný" trojkový detonátory, který nVidii udělaly pověst firmy s kvalitníma a rychlýma driverama. Právě tnehle tým přešel k ATi a začal s Catalysty. Takže řeči jako že "ATi neumí a neuměla" jsou... no... víš co ;-)

Vyjimecne s tebou NAPROSTO nesouhlasim a asi nebudu sam....

Jsem (byl) dlouholety uzivatel ATi a jeji ovladace jsou a byly peklo. Prechod na nVidia je pro me slast .... :-) Vsechny problemy co jsem resil (sobe a zakaznikum ) s pripojenim ATi na televizi, bugy ve hrach atd jsou s nVidii pryc ... Sice kolega , co se stara o obchod, tak protezuje Ati, ale jen ciste z duvodu pomer cena/vykon...

Pravda je, ze nove catalysty, rekneme od verze tusim 6.3 se extremne zlepsily v nastavovani na pripojeni na TV, ale furt to neni ono.

Taky neprekousnu, ze ati ovladace maji pres 100 MEGA !!!!! (ovladace + net framework) - kdepak to jsme ??? No ale kdyz muze mit "prazdy cisty" system Vista po nainstalovani 10G tak se asi neni cemu divit .... :-)

Drivery pro XP mají 35MB, .NET stahneš jednou. Pro visty .NET ani nepotřebuješ. TV-out používám od prvního Radeonu - ovládací panel se od té doby změnil 3x a ani s jedním jsem neměl problém TV out zapnout a nastavit tak, jak jsem potřeboval (bylo pár driverů, kde kvůli chybě něco konkrétního nefungovalo, ale nic co by přetrvávalo víc verzí). Ale ATi tu rozebírat nechci. Pokud to chceš ještě řešit, šoupnem se vedle :-)

Pamatujes na force TV detection ? ani to poradne nemakalo. Ne, nemusime to resit. Nepresvedsis me. Jak rikam od R7500 do R9800 jen Ati, ale pak uz jsem presedlal. Fandim Ati, spickovy HW, ale soft bida. BTW mam Ati TV wonder VE - spickova karta, spickovy obraz, BOHUZEl, nikdy korektne nechodila pod Okny, v linuxu spica ...

http://4um.ocguru.cz/showthread.php?...ghlight=ati+tv

Nvidia pinpoints 8800 slowdown cause, delays fix

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Původně odeslal Geo@B3D

http://techreport.com/onearticle.x/12993

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Nvidia confirmed that, as we suspected, the slowdowns are caused by a texture management issue, which would explain why 320MB cards are affected most often. The company says the root of the problem is applications failing to evict unneeded textures properly. The video card's drivers must account for this behavior and work around it.

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I must say, this caused some serious headscratching when I read it. "Applications failing to evict unneeded textures properly"? Wtf? Then why would it be limited to the 8800 series? Or even limited to Nvidia?

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XFX launch super-fast GeForce 8800 GTS 320MB

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So, what's so special about this board aside from the branded sticker? How does a core clock speed of 650MHz with Stream Processors clocked at 1500MHz strike you? How about coupling it with 320MB of GDDR3 memory clocked at 2GHz? Compare that to NVIDIA's reference clocks of 500MHz core, 1200MHz Stream Processors and 1.6GHz memory, and it's pretty clear that this is one incredibly fast card!

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XFX

S rozumnou cenou tohle vubec nebude spatna karta.