GDDR4 to offer 80 GB bandwidth for G80 | R580 cards?

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http://www.theinquirer.net/?article=27282

GDDR4 goes into action

Samsung ships 32MB chips to ATYT/NVDA for testing

By Theo Valich: Friday 28 October 2005, 07:52
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SAMSUNG, which is currently mired in controversy as you can read here
and here, has released a new generation of graphics memory, with specs
that promise one hot 2006.

Samsung's initial run of GDDR4 modules come in 256Mbits chunks, which
mean board makers will have to use eight chips to get to 256MB, or 16
for 512MB. If the company does not ship 64MB modules in a shipping
revision of GDDR4, this could prove to be a limiting factor for
reaching the maximum memory clock and bandwidth.

The latency of the shipped modules is set at 0.8 nanoseconds, which
limits the highest clockspeed of the memory to an astonishing 1.25 GHz
in DDR mode.

It does not take a braniac to calculate the possible bandwidth on
G80/R580 boards: 32-bytes (256-bit) x 1.25 (GHz) x 2 (DDR) results in
80GB/s of theoretical bandwidth, almost double the currently shipping
GDDR3 modules with ATI topping the GDDR3 charts with a 750MHz DDR clock
on their R520XT baby.

Both FSAA and AF "for free"? That day approaches
 
Hmmm ! ...80 Gig Bytes total...does this mean I could shove the whole of a
years gaming of 3 gig DVD's down the thing in one IN-STAN-TAIN-NEE-OUSE go
???..with lots of room to spare...The way PC games r now days might be the
best bit of hardware to have...

mouse
@@@
 
Trimble Bracegirdle said:
Hmmm ! ...80 Gig Bytes total...does this mean I could shove the whole of a
years gaming of 3 gig DVD's down the thing in one IN-STAN-TAIN-NEE-OUSE go
???..with lots of room to spare...The way PC games r now days might be the
best bit of hardware to have...
Click to expand...

When is this good DDR going to trickle down to system memory? Stuck with DDR
or high latency DDR2 still.
 
My understanding is that Dual channel (let alone Quad channel) with current
DDR 400 offers a greater bandwitdth than any current CPU/motherboard can use
anyway..

Mouse
@@@
 
Depends on platform. Notice the AMD64 platform showed only a minor increase
going from S754 to S939 (where the bandwidth doubled), partly because the
integrated memory controller greatly reduced latency. On the Intel side I'm
not so sure.
 
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