View Full Version : G71 has 32 pipelines, 32 pixel shaders & 16 ROPs
bkswaney
01-04-06, 08:48 PM
I'm sure Nvidia is redy for the 1900XTX. :)
I think 700 core is within specs for 9nm with
the right cooler. I bet they use the 512GTX cooler on it. ;)
I'm sure Nvidia is redy for the 1900XTX. :)
I think 700 core is within specs for 9nm with
the right cooler. I bet they use the 512GTX cooler on it. ;)
X1900 with its 48 pixel shaders is expected to perform very good in HDR+AA situations.
I have no doupt that Nvidia is capable of beating X1900 but would you pass playable HDR+AA for some extra performance?
X1900 with its 48 pixel shaders is expected to perform very good in HDR+AA situations.
I have no doupt that Nvidia is capable of beating X1900 but would you pass playable HDR+AA for some extra performance?
What makes you think that NV has not implemented HDR+AA in its G71? HDR is done in the ROP part of the GPU right? What not to stop ROPs of g71 being able to do HDR+AA? NV have said before they were going to address this issue.
AthlonXP1800
01-05-06, 03:55 AM
What makes you think that NV has not implemented HDR+AA in its G71? HDR is done in the ROP part of the GPU right? What not to stop ROPs of g71 being able to do HDR+AA? NV have said before they were going to address this issue.
And... AA is done in the pixel pipelines part of the GPU? Am I right? (xmasgrin)
And... AA is done in the pixel pipelines part of the GPU? Am I right? (xmasgrin)
IIRC AA is done also in the ROP.
slaWter
01-05-06, 04:27 AM
What makes you think that NV has not implemented HDR+AA in its G71? HDR is done in the ROP part of the GPU right? What not to stop ROPs of g71 being able to do HDR+AA? NV have said before they were going to address this issue.
Oh yes, i hope that the G71 are able to do HDR+AA. If not, ATI has (still) a big advantage....
What makes you think that NV has not implemented HDR+AA in its G71? HDR is done in the ROP part of the GPU right? What not to stop ROPs of g71 being able to do HDR+AA? NV have said before they were going to address this issue.
AFAIK the G71 is of the same G7X architecture so I don't think there will be any changes apart from adding pipelines maybe + some David Kirk (http://www.bit-tech.net/bits/2005/07/11/nvidia_rsx_interview/3.html) statements about the matter.
David Kirk:
"It would be expensive for us to try and do it in hardware, and it wouldn't really make sense - it doesn't make sense, going into the future, for us to keep applying AA at the hardware level. What will happen is that as games are created for HDR, AA will be done in-engine according to the specification of the developer.
"Maybe at some point, that process will be accelerated in hardware, but that's not in the immediate future."
Since NV40, AA sampling (and blending) capabilities of the nV hardware remained somewhat limited, compared to any R300+ part from ATi.
Each ROP in the core is able to output two AA samples in cycle and with second loop - the 4x mode can be achieved (two cycles, not counting the bandwidth limitations further). And here comes one big constrain - only one loop is allowed through each ROP! That means that no more, than 4x native MS is possible, in contrast with ATi hardware, where more loops are allowed.
If you want higher order sampling, the whole pixel data must be masterlooped through entire pipeline, incl. the texture data. E.g. the GPU must perform SuperSampling first to be able to give you more MultiSamples per pixel. That's why you won't see more than 4 MultiSamples per "texture kernel".
Want 8xAA? Render the entire image twice the verical resolution (1x2 SS), and apply 4xMS per each supersampled pixel.
AFAIK the G71 is of the same G7X architecture so I don't think there will be any changes apart from adding pipelines maybe + some David Kirk (http://www.bit-tech.net/bits/2005/07/11/nvidia_rsx_interview/3.html) statements about the matter.
David Kirk:
"It would be expensive for us to try and do it in hardware, and it wouldn't really make sense - it doesn't make sense, going into the future, for us to keep applying AA at the hardware level. What will happen is that as games are created for HDR, AA will be done in-engine according to the specification of the developer.
"Maybe at some point, that process will be accelerated in hardware, but that's not in the immediate future."
He also said 256bit bus was pointless, then ATI brought a card out with it and laid the smack-down on NV.
If ATI do it and it gets a big advantage, NV will follow.
we also have to remember that when these guys make statments sometimes they doing knowing that there compatition is listening...
we also have to remember that when these guys make statments sometimes they doing knowing that there compatition is listening...
Why would David Kirk "lie", at the time he did those statements it was already known the R520 could do FP HDR + AA (well, the rumours were very strong).
i hope that the G71 are able to do HDR+AA. If not, ATI has (still) a big advantage....
If not, the G71 is out of the question for me, no matter how fast it is. I played Farcry with HDR+AA on my XT, it's simply the nicest experience there is. I can't live with the fact that my next card couldn't do it.
Heat.
Actually, it's the exact opposite. The bigger the surface, the more heat dissipation at the same clockspeed. It's the transistor count that makes the chip bigger, not the clock speed, else we would keep the lithography the same (i.e. 0.13μ) and make the chip enormous just to be able to clock a chip faster. By the way, which part of Greece are you from? I'm from Thessaloniki.
slaWter
01-05-06, 11:58 AM
If not, the G71 is out of the question for me, no matter how fast it is. I played Farcry with HDR+AA on my XT, it's simply the nicest experience there is. I can't live with the fact that my next card couldn't do it.
Not for me. I need SLi because I don't want to change my mobo for Crossfire.
Actually, it's the exact opposite. The bigger the surface, the more heat dissipation at the same clockspeed. It's the transistor count that makes the chip bigger, not the clock speed, else we would keep the lithography the same (i.e. 0.13μ) and make the chip enormous just to be able to clock a chip faster. By the way, which part of Greece are you from? I'm from Thessaloniki.
Well increase of core size obviously means more transistors so...
I'm from Mesolongi.
Bigger core, more transistors, more voltage, more heat.
Primary reason why the Pressler chips are 65nm... less heat, lower voltage.
Not for me. I need SLi because I don't want to change my mobo for Crossfire.
I think (hope) it's a matter of time that we'll see a hack for enabling Cfire on NF4 Sli boards.
Monnie Rock
01-06-06, 12:23 AM
When is G-71 expected?
AthlonXP1800
01-06-06, 01:38 AM
When is G-71 expected?
February next month or maybe less than 30 days. :)
FraGTastiK
01-06-06, 04:15 AM
Actually its very funny to hear ATi drones stating that FarCry HDR is nice.and its the nicest experience there.back when Patch 1.3 enabled HDR for 6 series FarCry HDR looked like crap for them (regardless of AA) plus there were only few games that had support for HDR,therefore 6 series had nothing over X800 cards.now this only one game that ATi has the lead in makes all the difference.the X1800 ability to do HDR+AA will get old and not powerfull enough fast because X18xx cards are joining the ranks of cards with the shortest life-span of all time.Probably the HDR+AA feature on X18xx wont be powerfull enough to be used with acceptable performance for new upcoming games that may use it.the X19xx is just around the corner.
oh well they're finally there with SM3.0 after how long?roughly two years of being left behind.
I had the nicest experience of palying FC w/HDR for roughly two years now.with single 7800 I can play FC w/HDR at 1600x1200 res with acceptable framerates and minimal jaggies,use SLI and you can accelerate HDR rendering at 1600x1200 further more(yes you can).plus nothing is written in stone yet about G71 or even the FC 1.4 patch and current GFX cards.
still HDR+AA is a nice feature.thats just the way it goes,sometimes err... most of the times nV leads Ati follows (SM3.0,Multi GPU in its current form,etc...) sometimes ATi does (HDR+AA)
|White|Mute|saying that Nvidia leads and Ati follows just isn't the case.
Can you remind me who was first with a DX9 card in the market,first with 256bit bus(excluding crappy matrox bus),HDR(int)and playable 4xAA in every resolution?;)
Nvidia is great and all but we should give credit were it is due and not downplay ATi's successful and innovative presence in the graphics world like some fanATIcs did when NV30 came out.
I would personally prefer Nvidia to bring NV50 earlier and scrap G71.With NV50 coming in the summer timeframe I see little headroom for G71.
FraGTastiK
01-06-06, 12:20 PM
I would personally prefer Nvidia to bring NV50 earlier and scrap G71.With NV50 coming in the summer timeframe I see little headroom for G71.
although we have to wait and see what more G71 is capable of but yea I would like to see nv50 sooner than later while these two companies need to have some product against competitor's new release then you can blame ATi for relasing R580 in such a short perid of time after R520 hence the inevitable answer from nv,G71. ;)
About nV being ahead,particularly I was talking about the long recent struggle ATi had to do in order to catch up with nVIDIA on SM3.0 and Multi GPU(for the consumer PC aka gamer PC market) but as I said they both have their lead in tech innovations they just take turns,also sometimes they play this game of let them come up with theirs first(in situations like DX9 cards,obviously its not like nV never knew anything about DX9 and the need for a DX9 card until radeon 9700 came.)this round just took it so damn long for ATi to reach nVIDIA.Now nV needs to catch up with ATi on HDR+AA probably and at the same ATi needs to tune Xfire and so the story goes.
Umm crushing ATi to pieces is not a favorable thing to anyone on the consumer side of market including me .Personally I would like to see their optimized and matured Xfire(Xfire 3200 is it?),something without a dongle and master slave card hassle so I can choose between two mature solutions.right now I dont like Xfire in its current form at all.
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