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View Full Version : Rated speed of GDDR3 used on 6800U


lowdog
05-29-04, 07:03 AM
If the cards ram is clocked @ 1100MHz and uses Samsung GC20 (which was shown to be the case with some review cards) which is rated @ 500MHz. Then it means they have overclocked the ram by 50MHz.

if the 6800U memory speed is clocked @ 1100MHz then why do they use Samsung GC20 and not Samsung GC16 or GC14?

I am thinking of getting a 6800U but if they ship with Samsung GC20 which is being run above spec and not with GC16 then I feel that may be an issue down the line and impact on the life of the card.

Anyone know if we will see Samsung GC16 which is rated @ 600MHz on retail 6800U?

grimreefer
05-29-04, 09:02 AM
If the cards ram is clocked @ 1100MHz and uses Samsung GC20 (which was shown to be the case with some review cards) which is rated @ 500MHz. Then it means they have overclocked the ram by 50MHz.

if the 6800U memory speed is clocked @ 1100MHz then why do they use Samsung GC20 and not Samsung GC16 or GC14?

I am thinking of getting a 6800U but if they ship with Samsung GC20 which is being run above spec and not with GC16 then I feel that may be an issue down the line and impact on the life of the card.

Anyone know if we will see Samsung GC16 which is rated @ 600MHz on retail 6800U?
i thought it was rated at 600

Dazz
05-29-04, 04:21 PM
Yeah i think both the 6800 Ultra and X800XT PE use 1.2GHz 1.6ns memory.

Rob_0126
05-29-04, 11:10 PM
Yeah i think both the 6800 Ultra and X800XT PE use 1.2GHz 1.6ns memory.

1.6ns :eek:

Thats some fast ram.

MUYA
05-29-04, 11:18 PM
1.6ns :eek:

Thats some fast ram.
it is...but I wonder what latencies are involved? 4 cycles? or 5?

bkswaney
05-29-04, 11:27 PM
1.6ns :eek:

Thats some fast ram.

Yep they use the 600Mhz Samsung.
K4J553230F-GC16

I would think this memory will do 1250+ with good cooling. :)

lowdog
05-30-04, 12:33 AM
Yep they use the 600Mhz Samsung.
K4J553230F-GC16

I would think this memory will do 1250+ with good cooling. :)


I hope that is the case for the retail cards. My only concern is that some of the review cards had Samsung GC20.....if I brought a retail card and checked the mem used and it turned out to be GC20 I'd be pissed off.

I will probably buy one of the 6800U and I hope it uses the GC16 or else I'll return it and say it is using ram that is running beyond it's specs.

Skynet
05-30-04, 12:41 AM
It has to do with what is available. GDD3 RAM is hard to get in quantity right now because of its insane speeds. Think about it, anything under 2 nanoseconds is unforking-believable.

lowdog
05-30-04, 01:44 AM
It has to do with what is available. GDD3 RAM is hard to get in quantity right now because of its insane speeds. Think about it, anything under 2 nanoseconds is unforking-believable.

I understand that. What I am saying is that the retail cards better not have Samsung GC20....if they do then they are supplying a retail board that is running it's ram out of spec......I wouldn't want that, don't think anyone else would for that matter.

If they are going to ship retail boards out to consumers with GC20 then that is not right. Hopefully the first boards to hit the market won't be fitted with the GC20 just for the sake of useing up a surplus of this ram.