NVIDIA GeForce 8800 GT - G92 Takes Flight - HotHardware

NVIDIA GeForce 8800 GT - G92 Takes Flight

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Below is an easy to digest table of specifications for various members of NVIDIA's G8 series of GPUs and their associated reference board build-outs.  Here you'll be able to more easily place where the new GeForce 8800 GT should fall, in terms of overall performance and capabilities.



GeForce 8800 Ultra GeForce 8800 GTX
GeForce 8800 GTS
640MB
GeForce 8800 GT
512MB
GPU Core Clock
 612MHz 575MHz  500MHz  600MHz 
GPU Shader Clock
 1500MHz  1350MHz 1200MHz 1500MHz
Memory Interface Clock  1080MHz
(2160MHz DDR)
 900MHz
(1800MHz DDR)
800MHz
(1600MHz DDR)
900MHz
(1800MHz DDR)
Fill Rate
 39.2 GT/s
36.8 GT/s  24 GT/s 33.6 GT/s
Memory Bandwidth
 103.6GB/s  86.4 GB/s
 64 GB/s  57.6 GB/s
Stream Processors
128 128 96 112
Memory Interface
384-bit 384-bit 320-bit 256-bit
Fab Process
90nm 90nm 90nm 65nm
Number of Transistors
681M 681M 681M 754M
Street Price or MSRP $615 street $520 street $380 street $199 - $249 MSRP


OK, we know what you're thinking, 754M transistors with goosed up core clock and memory clocks that compete a GeForce 8800 GTX but this is a "mid-range" card.  And you'd be correct.  As the saying goes, today's high-end will be tomorrow's mid-range, so to speak.  But there's more to the picture here than the numbers really show.  With 112 Stream Processors and a 256-bit memory interface, the new GeForce 8800 GT offers higher overall fill-rate than a GeForce 8800 GTS but slightly less memory bandwidth, though some third party board partners may offer higher speed variants versus the reference design.  From a pure fill-rate perspective, the new GeForce 8800 GT should come within striking distance of a GeForce 8800 GTX but at a fraction of the cost, thanks in part to that 65nm die shrink.



If the above block diagram looks vaguely familiar, it's because it is.  What you're looking at is the same basics block layout of the NVIDIA G80 architecture but with only seven groups of 16 Steam processor units.  7 times 16 equates to 112 total stream processors.  So we have our basic math in check here but why the odd number of SP units?  Good question.  The simple fact is that this new GPU core is more or less a die shrink of the existing G80 minus one SP unit, or at least one of the 8 available on the original G80 core has been disabled.  However, in the immortal words of a cheesy infomercial host, but wait, there's more!  NVIDIA brought new features and engine enhancements to the GeForce 8800 GT and we'll dig into those next.

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 Great right up. Shame about the temp and noise however Zalman will hopefully come to the rescue on that one. Going to have to wait for AMDs reply until I decide whether to invest though.

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I haven't run 3Dmark06 lately so maybe the new drivers are a factor, but the overall score that the GT puts up is almost exactly the same as my ultra... am I missing something???

I couldn't help but say WTF to myself when I saw the score!!!

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Remember that the CPU is factored into the 3DMark06 score, so if your CPU is slower that will affect it. As will drivers of course. If you haven't run 3DMark06 in a while, there has been a lot of improvement in NVIDIA's drivers that you're probably not accounting for either.

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It must be the drivers because everything else is =.

I'll try later and see/post what I get.

 

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I was sort of surprised the card sounded a bit whiny to me and some of the other sites didn't notice. I, as did other sites, ran my tests on an open air bench but it was pretty warm in the lab one day during test and I heard the fan spin up a bit. Now, imagine putting the card in a hot case (don't imagine, I'll do it soon and let you know). I think things could get a little louder still but not to the point where its obtrusive.

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I overlooked the fact that a quad core CPU was used in testing. My score with GFX @ stock is 12,465. While I find the 8800's to be very good cards, I have every intention of upgrading to Nvidias next flagship so I can run Crysis faster. Quite frankly I am disappointed with the framerate my card puts out in Crysis at high settings, but thankfully anticipated such circumstances and put $$$ aside for the next card.

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 hows it run crysis?

 

jump ship on my gtx and sli two of them bad boys... Big Smile 

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 Meister, the Nvidia 9800 series are supposed to be announced around the middle of November so it might be worth bit of a wait on that one.

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 I have read the review that Hot Hardware did on the 8800GT and was wondering how you benchmarked Crysis?  Did you use the Crysis Benchmark Tool?

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