More Radeon HD 3850 and 3870 Specs Leaked

Jimmy 2004 · Nov 5, 2007

Graphics card manufacturer Diamond has quite conveniently leaked the specs for AMD/ATI's upcoming HD 3800 series of cards, giving the technical details of both the HD 3850 and the HD 3870. These do conflict a little with the earlier leaked specs, although they're still quite similar. According to the Diamond site, the HD 3850 will feature a core speed of 668MHz and 256MB of 256-bit GDDR3 memory at 828MHz (1656MHz DDR) and the HD 3870 will have a core speed of 775MHz and 512MB GDDR4 memory at 1.2GHz (2.4GHz DDR). Both will be manufactured using a 55nm process, and both will support DirectX 10.1 and Shader Model 4.1. Interestingly the cards are also said to feature up to four GPU support using an AMD 790FX based motherboard. The full specs are shown in the screenshots below, as Diamond has now removed the cards from its website.

View at TechPowerUp Main Site

Homeless · Nov 5, 2007

24x custom AA... oh my

Hawk1 · Nov 5, 2007

Why am I having Dejavu? I could of sworn I saw this on here before. Hmm. maybe not TPU, but I could swear...anyway, looks decent, but I'll have to see some benchies.

tvdang7 · Nov 5, 2007

wait so the 3850 is slower than the 2900xt? dang i guess the price will make up for it.

mandelore · Nov 5, 2007

lol its the same as the R600, except dx10.1 etc and die-shrink.

the 2900xt has 24x custom AA...

erocker · Nov 5, 2007

2.4ghz memory is a bit faster than the 2900. We also have no idea what the shaders are going to be clocked at. I think ATi could have something up thier sleeves with this one. But then again it's AMD, I can't think of anything amazing from them recently. Mabye their new motherboards..

tvdang7 · Nov 5, 2007

well i think the 1gb vs 512 mb comparison proved that the card isnt that memory bandwidth starved. what they needed is a higher core speed but i guess their new process isnt that efficient enought to pump put super fast core. This card is 256bit so it might need the bandwidth.

Weer · Nov 5, 2007

mandelore said:
lol its the same as the R600, except dx10.1 etc and die-shrink.

the 2900xt has 24x custom AA...

But it only has a 256-bit memory bus. It's actually worse than the 2900XT.

[I.R.A]_FBi · Nov 5, 2007

Weer said:
But it only has a 256-bit memory bus. It's actually worse than the 2900XT.

but who says teh bandwidth is teh limiting factor?

Darkmind · Nov 5, 2007

AMD better have the shaders clocked at least at 1.5ghz, grrr. If it is then this card will definitely be a contender.

wazzledoozle · Nov 5, 2007

What a horrible, horrible naming scheme. Whoever created it needs to be shot.

Jimmy 2004 · Nov 5, 2007

wazzledoozle said:
What a horrible, horrible naming scheme. Whoever created it needs to be shot.

Just wait until you get the Pro, GT, GTO, XT, XL and GTO2 versions of them. :shadedshu

WarEagleAU · Nov 5, 2007

Nice specs, but I really wish they would have tweaked the 2900Xts and released XTXs for the high end segment. That would have been better IMHO.

indybird · Nov 5, 2007

I dunno, I guess I have a little more faith in these cards then most of everyone here. I am guessing the HD3870 512MB will be able to compete with an 8800 Ultra. Then when they release the 1GB version, then I think it'll beat the Ultra.

If ATI fails me here and this card isn't that great then I'll probably wait just a little longer for the new 8800GTS 512MB.

-Indybird

Weer · Nov 6, 2007

[I.R.A]_FBi said:
but who says teh bandwidth is teh limiting factor?

Even if it's not, this card is still inferior to the 2900XT at stock.

FatForester · Nov 6, 2007

Bah! Spec's are specs. Give us benchies!

sneekypeet · Nov 6, 2007

Hawk1 said:
Why am I having Dejavu? I could of sworn I saw this on here before. Hmm. maybe not TPU, but I could swear...anyway, looks decent, but I'll have to see some benchies.

It was here at TPU with a title of something like Diamond jumps the gun , or somethin along those lines!!!!! Altho I cant seem to find the thread any longer so who really knows....lol

[I.R.A]_FBi · Nov 6, 2007

FatForester said:
Bah! Spec's are specs. Give us benchies!

agreed!

Kursah · Nov 6, 2007

Weer said:
Even if it's not, this card is still inferior to the 2900XT at stock.

That's product placement my friend. And does it really matter if it performs just as well?

The 8800GT proves that a 256-bit bus is still plenty usable for current GPU technologies. Sure 320-512-bit is good for bragging rights, but if a 3850/70 can match the 2900XT's performance with less, then the extra width wasn't as useful as advertised. I personally think it's a great idea to use the full extent of the 256-bit bus with a smaller and more powerful GPU at better price point.

In the end what get's the best performance for the money is all that should really matter, considered inferior or not has no matter IMO. But hard to draw conclusions until we see the product and the actual performance (not just 3dmarks either...actual games). I'm looking forward to the release of this product, and am glad the 8800GT is doing so well atm. I want to see more competetiveness between ATI and NV this year.

:toast:

happita · Nov 6, 2007

oc ability should be very interesting to see on these 55nm beasts :toast:

[I.R.A]_FBi · Nov 6, 2007

i cant wait, cause crysis just put on an arse whipping on my 7900GS

DaJMasta · Nov 6, 2007

Hawk1 said:
Why am I having Dejavu? I could of sworn I saw this on here before. Hmm. maybe not TPU, but I could swear...anyway, looks decent, but I'll have to see some benchies.

Naw I think I remember seeing these (or at least almost identical ones in the last week or two).

imperialreign · Nov 6, 2007

i cant wait, cause crysis just put on an arse whipping on my 7900GS

and on the 1950s. I can't run any AA at all! :mad:

The 8800GT proves that a 256-bit bus is still plenty usable for current GPU technologies. Sure 320-512-bit is good for bragging rights, but if a 3850/70 can match the 2900XT's performance with less, then the extra width wasn't as useful as advertised. I personally think it's a great idea to use the full extent of the 256-bit bus with a smaller and more powerful GPU at better price point

agreed, here - ATi tend to have highly competitive cards that have less onboard memory then nVidia, which, to me at least, just says that they make full optimal use of the GPU's memory BUS.

But give us some card's that can be decently OCed and monitored!! I somehow get the feeling that it was AMD's influence on ATI to remove hardware monitoring and fan control on the upper mid-range cards . . .

eidairaman1 · Nov 6, 2007

sweet more info

mandelore · Nov 6, 2007

if AMD would give us software voltage control, the cores on alot of 1gb 2900xts will soar past 1ghz core, as i can already do 2600MHz memory speed, and that would be simply awesome.

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