Support NeoGAF

[xexex]

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
Advert
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 ineluctably. µ

I forget what exact bandwidth GDDR3 provides 256-bit PC GPUs; G70/GeForce 7800 and R520/Radeon X1800, but I think it's in the area of 35-40 GB (or somewhat more).... If it is true that GDDR4 at 256-bits provides ~80 GB, that's a NICE bandwidth increase for year-2006 PC GPUs like R580, G80, R600, etc, and *not* yet even going to 512-bit memory bus.

could you imagine X360 and PS3 with 256-bit buses and GDDR4 O_O

 

[Wunderchu]

just for information: X1800 XT has 48 GB/s VRAM bandwidth (source: http://www.beyond3d.com/reviews/ati/r520/index.php?p=10 )

 

[PotatoeMasher]

could you imagine revolution with 256-bit buses and GDDR4 O_O

fixed.... and