On Thu, 15 Apr 2004 16:29:41 +1200, wrote:




I am referring to the Heat,

25 watts is 25 watts of heat.........
Remember the heat from a 25 watt light bulb ? That is the extra heat
you will need to get rid of if you replace a 9800XT with the 6800
Ultra. Hopefully, that bulb will now turn on for you.

For comparison, a Prescott3.4 GHz processor dissipates103 watts max,
just 7 watts less than the 6800Ultra, max.. Northwood 3.4GHz is 89
watts.

Now maybe you can see why a 480 watt power-supply is not
entirely out of line when you add in the other peripherals.

any way the ATI 9800xt cards do not seem to have a
extra power connector..?

Unless I am blind..


Neither does the non-Ultra version of the 6800, which runs with
12 pipes, a 1-slot-high heat-sink and probably has very similar total
power consumption to the 9800XT, since the GDDR3 memory
runs cooler than DDR1. BTW, for neither the 9800XT or the 6800
non-Ultra would I ever recommend putting a card in the adjacent
PCI slot.

The power-connectors on the 6800Ultra are marked Primary
and Secondary. nVidia is probably paranoid about having very
low line-impedances to the card to avoid digital glitches, since
the peak-current surges to the GPU will be very spiky.

John Lewis




er.... I think that you will find that the max. dissipation of the
R420 will be very similar, if Ati volunteer to tell you at all........
No doubt Tom or Anandtech will measure it anyway...........


John Lewis




Preferably 4 "disk-drive" cables available from power-supply.
Two must be available EXCLUSIVELY for the 6800 Ultra.
( minor exception --- auxiliary fans are allowed to co-use
these cable feeds )

Power-supplies with only 3 cables will need some $2 splitters
on the third cable for the various disk drives --- not a real
problem, since their power consumption is very low.


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Life is not measured by the number of breaths we take, but by the moments that take our breath away. (George Carlin)

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Life is not measured by the number of breaths we take, but by the moments that take our breath away. (George Carlin)