Tiger Woods Out...Until August!
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#205
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Anonymous at 11:55pm 06/29/2006
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<h1>casks proselytize toothbrushes?elf harsher ... </h1>
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#204
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Author:
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Anonymous at 01:17pm 06/28/2006
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<h1>pluck consequentiality collarbone outpost gamblers
Coriolanus - Tons of interesdting stuff!!! </h1>
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#203
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Anonymous at 08:58am 06/27/2006
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<h1>Sian cabbages supersede nucleotide:comfortabilities ...
</h1>
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#202
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Anonymous at 02:54am 09/16/2005
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null null null null null null null null null null null null null
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#201
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Author:
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Anonymous at 02:54am 09/16/2005
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null null null null null null null null
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#42
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Author:
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deimos47 at 12:12pm 06/18/2004
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Response to #41:
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When I posted as annonymous saying that maybe there is some other
difference in the chip, I meant like between 9600 and 9800. Both
supposedly come from same architecture, but they don't just differt
by number of pipelines but also by number of vertex shaders. I guess
I'm trying to say that there are other ways to limit performance
than cutting of pixel pipelines.
Although once again I agree with you that the OC benchmark numbers
seem on the low side, we only overclocked from 325 to 380 and this
is a 12 pipeline design so expect to have lower gains than say a
6800gt (16 pipe, default 350) from 325 to 380. And like I said
earlier I think the bottleneck is somewhere else.
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#41
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Author:
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Anonymous at 07:40am 06/18/2004
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Response to #37:
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Most GeForce 6800 cards I've read about have had the wrong BIOS (one
of which was a Leadtek WinFast A400 TDH), causing synthetic test
results that would be expected if it only had 8 pipelines, instead
of 12. Since FiringSquad didn't post any synthetic test results or
the BIOS version, it's impossible for us to know if their card had
an incorrect BIOS.
Some anonymous guy wrote:
"3. But this is a different GPU... maybe they
lowered amount of cache, less Vertex Shader
units/T&L units, etc. In fact considering how
CPU limited we are, nVidia would be very wise to
do something like this, or otherwise the 6800
would score too high, and nobody would buy the
6800GT/6800Ultra/6800UE - like what happened to
GF4Ti-4400 and GF4MX-460."
It isn't a different GPU, it's the same NV40 as the 6800 Ultra which
is the same NV40 as the 6800 GT. The only difference is it has 4 of
the 16 pipes disabled. Just like the Radeon 9500 Pro was the same
R300 chip and had 4 of the 8 pipes disabled. Just like the Radeon
X800 Pro is the same R420 chip and had 4 of the 16 pipes disabled.
And that is why it doesn't "score too high". At the same
clock speed, it automatically has 1/4 less fillrate. But since it's
clocked lower, it only has about 61% of the fillrate of the 6800
Ultra. It also only has about 64% of the bandwidth of the 6800
Ultra.
Despite all that, overclocking the core by 55MHz and overclocking
the ram by 155MHz should increase performance by more than 3%-5%
when you aren't CPU limited. How can you tell when overclocking
should give larger increases? When the same chip with more fillrate
and more bandwidth gets much h
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#40
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Author:
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Trogdor at 01:16pm 06/16/2004
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Response to #39:
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Something else to consider: Texel fill rates.
Theoretical two-texture fill rates for the GT and 6800 are:
6800 stock: 3900 Mtex/s
6800 OC'ed: 4560 Mtex/s
6800 GT: 5600 Mtex/s
(Single-texture fill rates would be double those numbers, but
relative performance is still the same.) The GT is still pretty
much untouchable by the 6800, but overclocking should have closed
the gap some and it didn't. The 6800 would need a 467 MHz core to
match the fill rate of the GT. Somehow, I doubt we'll see anyone
pulling off a 50% overclock.
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#39
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Author:
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Trogdor at 01:10pm 06/16/2004
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Response to #37:
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Well, you at least got most of my point. Sure, at default clock
speeds the 6800 only has 22.4 GB/s of memory bandwidth while the
6800 GT has an impressive 32 GB/s of bandwidth. Overclocked to 855
MHz RAM, though, brings the 6800 up to 27.4 GB/s.
If we're CPU limited, then none of the more expensive cards would
score higher than the cheaper cards. In Far Cry at 1600x1200,
though, the 6800 Ultra and 6800 GT are over twice as fast as the
6800. Ergo, we are not CPU limited.
If we were GPU core limited, then adding more memory bandwidth
wouldn't help either. Again, though, the 6800 GT is only clocked 25
MHz faster than the 6800, plus another 33% performance because it
has 16 pipelines. Since it's twice as fast, we aren't purely GPU
core limited. (We are somewhat core limited, though, or else adding
more pipelines wouldn't have helped.)
If we're not CPU or GPU core limited, then we're memory bandwidth
limited. It's the only thing left. The 6800 GT has 17% more
bandwidth than the overclocked 6800, and 42.9% more than the stock
6800. Obviously, that helps a lot in making the GT twice as fast at
stress settings.
Combined with the high resolution and 4xAA, not to mention 8xAF,
it's no surprise that we're almost totally GPU limited. That's the
whole point of running at these resolutions (which almost no one
actually does in real life).
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#36
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Author:
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Trogdor at 10:01pm 06/15/2004
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Response to #28:
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I know you can't expect linear increases, but still, you're looking
at a greater than 15% overclock where you are clearly not CPU
limited. If you were CPU limited, the 6800 GT and 6800 Ultra
wouldn't score much higher than the 6800. At low resolutions, this
is often the case, but the tests were run with 4xAA and 8xAF at high
resolutions, and NONE of those even came close to matching the 6800
GT and 6800 Ultra. Either that, or the default settings that were
reported (325 core and 350/700 RAM) were not correct.
I think the default speeds are correct, as compared to the 6800 GT
(350 core and 500/1000 RAM) the benchmarks look pretty accurate.
Far Cry at 1600x1200 with 4xAA and 8xAF scores 36.2 on the GT. The
6800 has 3/4 as many pipelines, so performance would be 3/4 that of
the GT at the same speeds. That would give you an estimate of 27.15
FPS. However, they aren't the same speed - the 6800 is 7.1% slower
in core speed and more importantly 30% slower in RAM speed.
Multiply the 27.15 by 70%, and you get 19.00 FPS, which is rather
close to the 18.3 FPS result that was measure. Likely, the 25 MHz
clock speed advantage accounts for the remaining .7 FPS. Using the
same math as above to estimate the performance of the overclocked
6800, it should have been more like 25 or 26 FPS at 1600x1200. More
likely, the overclock was 330/755 or something, as that would match
the reported scores a lot better.
I know you like to think your people are correct, but something is
wrong with those overclocking results. Look at the results - you're
not CPU limited to 18 or 19 FPS when the 6800 Ultra is capable of
running at twice that speed! Probably the o
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