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[vr-zone] RV770 final specs revealed - Page 4

post #31 of 72
Quote:
Originally Posted by francesthemutes View Post
I really don't know how much a 512-bit bus improves performance but a lot of people attribute the 2900's killer 3DMark performance to that. A lot of other people say the 3800 series would have stomped the 8800GT if it had a 512-bit bus.

It's alright, though. I'm done with upgrading my computer. I may shove in some Ballistix or another 3870+new PSU but as for CPU and mobo upgrades, I'm waiting until Nehalem... or at the most, Nehalem's die shrink.
3870 does better in 3d mark than 2900

and bus width doesn't matter per se, what does is memory performance.

GDDR5 IS FAST.
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post #32 of 72
4870 CrossFire > 4870X2.
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post #33 of 72
Looks like the HD4850 is going to be my next upgrade - my poor X1900XT 256MB is getting long in the tooth, and I might be upgrading my monitor to a 20-22" IPS widescreen panel, and the higher resolution will almost certainly be the final nail in the coffin for my poor card.

The HD4870 is also a consideration, but only if there are some serious performance gains (or the HD4850 uses a single-slot cooler). The power draw of the HD4870 worries me though - 150w puts it right at the edge of requiring an 8-pin PCI-e connector, which my power supply does not support.

And it's nice to see that AMD finally doubled up on those TMUs, that should help out quite a bit.
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post #34 of 72
Quote:
Originally Posted by Joeking78 View Post
Wow. GDDR5?? I've been out of the game for sometime...never knew that was on its way.

The top of the range X4 looks like quite the beast
When did GDDR4 come out? Ohh yea, ATI DID it.
post #35 of 72
Quote:
Originally Posted by xlink View Post
3870 does better in 3d mark than 2900

and bus width doesn't matter per se, what does is memory performance.

GDDR5 IS FAST.
Bandwidth matters..
Bus width i something that matters a lot in high resolutions.
Comparing 128-bit width to 256-bit is the same as comparing Single Channel DDR and Dual Channel, which is better?
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post #36 of 72
Quote:
Originally Posted by metala View Post
Bandwidth matters..
Bus width i something that matters a lot in high resolutions.
Comparing 128-bit width to 256-bit is the same as comparing Single Channel DDR and Dual Channel, which is better?
Bus width does matter at high resolutions, but with these cards in particular i think the sheer speed of the GDDR5 will be sufficient to overcome the 256 bit bus.
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post #37 of 72
ok so now im in sort of a PICKLE, my card is a freaking old school x800xt 256mb and i wanted to upgrade to either the 3870x2 (present one or the one thats coming with gddr4 ram) or 8800 gts512/9800gtx. i want the 4870x2 card so what should i get in the mean time that is cheap and i will suffice for the time being. i have a maximus formula mb so i can do crossfire but seeing that the 4 series wont be able to cf to the present 3 series, i doubt ill be doing crossfire. any suggestions??????
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post #38 of 72
Quote:
Originally Posted by MomijiTMO View Post
Hmmm doesn't the 4850 look appealing as the 4870 has 1GB of DDR5 on a 256 bit bus. . . .
That's 2x512MB of memory on 2 256-bit buses, I believe. "Effectively" 1GB on a 512-bit bus, I'd imagine.
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post #39 of 72
Damnit, I wish I had waited a few more months for a RV740 gpu instead of this 8800gt. Don't get me wrong it's a great card, but that 740 looks amazing for a budget builder.
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post #40 of 72
Quote:
Originally Posted by pauldovi View Post
4870 CrossFire > 4870X2.
It may or may not be that way pending drivers. If drivers were done right the 4870x2 would be faster because theres less latency.

And holy crap 1ghz on stock clocks for a gpu and GDDR5 too?! AMD is in the zone lately for graphics!
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