NVIDIA GeForce 8800GTX/GTS

[Semik]

Zvlast v dnesni dobe, kdy je vetsina her vyvijena na PS3/X360, ktera ma 512MB a hry jsou na to delane.

Nie, u PS3 je pamäť napevno rozdelená na 256 VRAM a 256 RAM. U X360ky je 512 zdielaných VRAM aj RAM, takže tiež nemožno použiť všetko. U konzol je však memory manažment ručne dotiahnutý k dokonalosti, takže sa to nedá porovnávať. (optimalizacia)

Ináč by som samozrejme tiež volil 640MB ak chceste hrať v Max detailoch. Tých 320 stačí na sučasné hry ale u PC treba trochu pridať, aby to tak šlo aj u zajtrajších hier.
Edit..

[Haste]

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

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.

[Masster]

Random slowdown bug plagues GeForce 8800 cards

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.

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.

[Masster]

More data on the GeForce 8800 random slowdown bug

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.

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

[no-X]

Nvidia pinpoints 8800 slowdown cause, delays fix

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

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.

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?

[Masster]

XFX launch super-fast GeForce 8800 GTS 320MB

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!

XFX

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