NVIDIA's GeForce 7800 GTX Hits The Ground Running
by Derek Wilson on June 22, 2005 9:00 AM EST- Posted in
- GPUs
The Test, Card, and High Resolution
Before we get down to the performance tests, let's look at our test system.ASUS nForce 4 A8N-SLI Deluxe Motherboard
AMD FX-55
1GB DDR3200 2:2:2:8
120GB Seagate 7200.7 HD
OCZ PowerStream 600W PSU
The card this time around is a single slot solution. With the process shrink to 110nm an insignificant increase in clock speed, NVIDIA has produced a chip that runs at lower power and temperature than NV40. At the same time, the increase in parallelism has served to boost performance.
Layout of the card is relatively similar to the 6800 Ultra, but there are a few differences. We've still got 2 DVI slots (both single link), but the solder point for the silicon image TMDS chip for dual-link DVI is either missing or moved. We will certainly be interested in seeing a workstation version of this part.
Here's a quick recap and summary of the G70 and GeForce 7800 GTX:
302M transistors
Over 300mm^2
110 nm TSMC fabrication process
Single Slot HSF
430MHz Core clock
600MHz GDDR3 256MB/256-bit
8 vertex shader units
24 pixel shader units
16 ROP units
2 DVI and one HDTV / VIVO connection
PCI- Express (demand for an AGP part will be determined and addressed if necessary)
~100W Power
350W Power Supply Recommended (500W for SLI)
So what is all the fuss about? Here's a look at the NVIDIA GeForce 7800 GTX card:
Why high res?
It is important to remember that we tested at resolutions of 1600x1200 and higher because lower resolutions are CPU limited without AA and AF enabled. In many cases the GeForce 7800 GTX don't show much difference in performance with and without antialiasing at lower resolutions. This kind of data doesn't give us much useful information about the card. We have truly reached another plateau in graphics performance with this part: pushing the card to the max is all but necessary in order to understand its performance characteristics.
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Diasper - Wednesday, June 22, 2005 - link
oops posted before i wrote anything. Some of the results are impressive, others aren't at all. In fact results seem to be all over the board - I suspect drivers are something of the culprit and are to be blamed. Hopefully, as new drivers come out we'll see some performance increases or at least more a uniform distribution of good resultsDiasper - Wednesday, June 22, 2005 - link
Live - Wednesday, June 22, 2005 - link
Derek get cracking, the graphs are all messed up! And the Transparency AA Performance section could use some info on what game it is tested on and some more comments. I also think that each benchmark warrants some comments for all of us that have a hard time remembering two numbers at the same time. Keep it simple folks….Johnmcl7 - Wednesday, June 22, 2005 - link
I agree something is wrong with these results, I thought they were odd but when I got to the Enemy Territory ones they seem completely wrong - at 2048x1536 and 4xAA the X850XT is apparently getting 104 fps, while the 6800 Ultra gets 48.3 and the SLI 6800 Ultras are only getting 34.6 fps! Especially bearing in mind it's an OpenGL game.John
rimshot - Wednesday, June 22, 2005 - link
This has got to be an error by Anandtech, all other reviews show the 7800GTX in SLI at those same settings hammering the 6800Ultra in SLI.Lonyo - Wednesday, June 22, 2005 - link
The benchmarks are all a load of crap it seems.Check the Wolfenstein benchmarks.
The X850XT goes from 74fps @ 1600x1200 w/4xAA to 103fps @ 2048x1536 w/4xAA
A 33% increase when the res gets turned up. Good one.
There also seem to be many other similar things which look like errors, but they could just be crappy nVidia drivers, or something wrong with SLI profiles.
Who knows, but there's definately a lot of things which look VERY odd/suspicious here.
Dukemaster - Wednesday, June 22, 2005 - link
My Iiyama VMP 454 does 2048 no prob so i'm game :pvanish - Wednesday, June 22, 2005 - link
oh and in several of the benchmarks, the 6800U SLI more than doubles the performance over the single 6800U. Is that normal? I thought SLI gains were generally about 45% or so.rimshot - Wednesday, June 22, 2005 - link
Is it just me or is it a little strange that the 6800Ultra SLI outperforms the 7800GTX SLI at 1600x1200 with 4xAA in every benchmark ???PrinceXizor - Wednesday, June 22, 2005 - link
No comment on the fact that in virtually every game it LOSES to the 6800 SLI at 1600x1200 at 4XAA.All other scores look very impressive. But, in this particualar group of settings, the 6800 SLI eats it for lunch.
P-X