AMD To Launch RV770 On June 18th

Gerard · 18 Jun 2008 at 22:24

Azza said:
On behalf on Fornow.

Thats a pic of a 3870x2, wonder why theyre using that. :confused:

Azza · 18 Jun 2008 at 22:25

Gerard said:
Thats a pic of a 3870x2, wonder why theyre using that.

No doubt just a mistake in it.

Reed · 18 Jun 2008 at 22:25

Gerard said:
Thats a pic of a 3870x2, wonder why theyre using that.

just a placeholder i imagine ? or i hope...

icey_haj · 18 Jun 2008 at 22:26

Azza said:
No doubt just a mistake in it.

Phew, I was going to say how ugly...

Mr Paul · 18 Jun 2008 at 22:29

fornowagain said:
Nothing.

Its the 1Gb version, going to be a bit more expensive.

Isn't there a calculation that works out the GFLOPS from number of shaders and core speed?

fornowagain · 18 Jun 2008 at 22:33

Mr Paul said:
Isn't there a calculation that works out the GFLOPS from number of shaders and core speed?

It doesn't tell you the flop count? You need two to get the third.

Shaders x 2 ops x shader clock

e.g. 160(5) x 2 x 750e6 = 1200 GFlops

icey_haj said:
Phew, I was going to say how ugly...

Better?

gurusan · 18 Jun 2008 at 22:34

Azza said:

that's odd that the pixel fillrate is the worse than my clocked 3850? That must be reading it wrong!?

Mr Paul · 18 Jun 2008 at 22:34

(480 SPs * 2 (op per second) * 850 Mhz) = 816 Gflops.
(800 SPs * 2 (op per second) * 850 Mhz) = 1360 Gflops.

Hmm I think I may have it wring lol.

icey_haj · 18 Jun 2008 at 22:38

fornow is that the 4870?

steve258 · 18 Jun 2008 at 22:39

mem bandwidth is really low for gddr5 as well despite having only 256bit interface?

fornowagain · 18 Jun 2008 at 22:41

Pixel fillrate is simple enough, core x rops (RBE)

750e6 x 16 = 12 GP/s

Jokester · 18 Jun 2008 at 22:42

W1zzard's probably got the numbers wrong for it.

fornowagain · 18 Jun 2008 at 22:42

steve258 said:
mem bandwidth is really low for gddr5 as well despite having only 256bit interface?

GDDR5, it double channel, so x2 the value. Quad the base frequency.

gurusan · 18 Jun 2008 at 22:44

i thought the 4870 was supposed to have more ROPs, or was it TMUs?

fornowagain · 18 Jun 2008 at 22:44

gurusan said:
i thought the 4870 was supposed to have more ROPs, or was it TMUs?

Its got 32 TMU from the fillrate shown. So twice 3870, but same # of rops.

750e6 x 32 = 24 GT/s

RoachycaL · 18 Jun 2008 at 22:47

fornowagain said:

Wowowowowowow! That looks smaller than the 2900XT! Am I correct? Finally the GPU manufacturers have realised their cards are too big!

psychas · 18 Jun 2008 at 22:47

Azza said:
On behalf on Fornow.

mh its quite ok price i guess as its 1 gig version why it should be 230£ i think somebody cant count 259 euro is 205 £ this is including vat well some websites can put extra premium but if u know were to look u get them cheaper.

i bet 512 mb is going to be somewhere 230 euro

Azza · 18 Jun 2008 at 22:49

Another preview, this time from Israel

http://hwzone.co.il/reviews/4850_preview/

Please dont ask me what res the Crysis tests where run at 'cos believe it or not I canny read Hebrew.

Jokester · 18 Jun 2008 at 22:51

How do I turn the page

gurusan · 18 Jun 2008 at 22:51

wow that 3dmark06 scaling in CF mode is amazing