radeon 5770 ?

chaotic_uk · 6 Oct 2009 at 01:54

when are the 5770's being released ? , whats the full specs of this card ?

Banshee · 6 Oct 2009 at 06:23

This is the last i saw about that card: http://www.tomshardware.co.uk/forum/page-270848_15_0.html

drunkenmaster · 6 Oct 2009 at 07:21

Today, it would seem.

£130ish, 11XX shaders, forget the exact number, gig of gddr5, 128bit bus. Out so soon, because of the low yields on the parts, trying to work out how good it is. A lot of shaders, ok bandwidth because of the gddr5, even more so if it overclocks well.

Wondering how well it will hold up considering how well the 4770 with a 128bit bus did with was it 640 shaders. 2 could well be quite a bit faster than a 5850, for not much more, could also be faster than a 5870 for quite a bit less.

Hmm, that link suggests a 192bit bus, though I don't think they can fit in 1gb mem, with an odd sized bus, you get odd sized memory. Which is why the 8800gtx, had 768mb mem, with a 384bit bus, which is why again the GT300 with the same bus, is going with 1.5gb mem, it can't use 512mb or 1gb. I've seen a 5770 listed with 1gb mem so its almost certainly got a 128/256mb bus and nothing inbetween.

If they really do have a 192bit bus, with high speed gddr5, that overclocks very well, and the 5870/50 are completely not memory bandwidth limited anyway, it could be a superb card.

EDIT:- on seconds thoughts, as most ATi cards since, well, really the x1800 have had less rops than they should have, with the 5870 still limited by rops which is shown by the fact an equally clocked 5850 with 10% less shaders give almost identical performance in all games. This should be a cut down 5870 core, salvaged parts, we were expecting a drop in ROPs on the 5850, which we didn't see, I wonder where this will be, full 32 would make it a very beefy card, all the way back to 16 and thats what everyone assumes, it should be similar/close toa 4890, if it has 20-24 though, it could be a fantastic, truly fantastic card.

Banshee · 6 Oct 2009 at 08:20

I would also expect a 128bit bus to be honest but like you say the ROP count will be interesting. Again I would expect it to be 16 to keep die size down for max profitability but you never know they might just squeeze in 24, which would surely give ATi a mainstream monster as long as it isn't bandwidth bottlenecked.

gurusan · 6 Oct 2009 at 08:25

I thought it was supposed to be released on the 12th?

Banshee · 6 Oct 2009 at 08:27

Just seen on wiki its listed as 24 ROP but as ever with wiki info take with a big pinch of salt lol. If the figures are true though it really should fair extremely well price/performance.

HeX · 6 Oct 2009 at 08:31

I'm really interested in these also, even the 5750 if they are about £100.

If they are the same speed or faster than a GTX260/4870 i'll probably grab one, then grab a 2nd down the line.

drunkenmaster · 6 Oct 2009 at 08:47

Banshee said:
I would also expect a 128bit bus to be honest but like you say the ROP count will be interesting. Again I would expect it to be 16 to keep die size down for max profitability but you never know they might just squeeze in 24, which would surely give ATi a mainstream monster as long as it isn't bandwidth bottlenecked.

Not about die size, they are the full 2.15billion transistors as a 5870, just with failed parts turned off. Thats why, its possible it has 32, but very unlikely, if it did, the numbers it could do would be very very interesting indeed, the question really is how many have been cut. We can't say at all which parts of the core are doing worst with the TSMC process, or if its random so till we see final specs we're just guessing. THe site that has it listed for sale(due in today) says its 4.8Ghz mem, 850mhz core, 1GB mem and 128mbit bus, which all sounds plausible, but doesn't list rops.

So tempted to pick one up on the hope they are good, and maybe just to play with something new, though I had been planning on a 5850 being bought today.

Given enough ROPs it probably would be bandwidth bottlenecks, but in a good way. Its better it has the raw horsepower available than not, and overclocking the mem by 400-800Mhz is quite possible taking its bandwidth up a decent chunk. If its got the shader power and is rop limited, at already high clocks you simply can't make up for lack of them with increased clocks (well not much).

gurusan · 6 Oct 2009 at 08:50

No I don' tthink it's just failed 5870 chips....I seem to recall reading somewhere that these were 1.3 billion transistors with 24 ROPs

Lightnix · 6 Oct 2009 at 08:59

drunkenmaster said:
Not about die size, they are the full 2.15billion transistors as a 5870, just with failed parts turned off. Thats why, its possible it has 32, but very unlikely, if it did, the numbers it could do would be very very interesting indeed, the question really is how many have been cut. We can't say at all which parts of the core are doing worst with the TSMC process, or if its random so till we see final specs we're just guessing. THe site that has it listed for sale(due in today) says its 4.8Ghz mem, 850mhz core, 1GB mem and 128mbit bus, which all sounds plausible, but doesn't list rops.

So tempted to pick one up on the hope they are good, and maybe just to play with something new, though I had been planning on a 5850 being bought today.

It seems to be heavily implied by AMD's marketing that it's a separate core:

http://anandtech.com/video/showdoc.aspx?i=3643&p=3

I'd also say it's evidenced by the fact that they say they need a cheaper to produce core, disabling SIMDs on Cypress does not achieve that - it just makes it run slower. It also kind of defies AMD's recent naming schemes to name two like chips completely differently (with the exception of the X2 parts). Also I've heard the figure 1.3 billion transistors for the Juniper part, which would fall about in line with the configurations we've seen.

Also, if this picture really is of Juniper, then judging by the bracket, the core is physically far smaller:

http://www.techpowerup.com/?102018

Martini1991 · 6 Oct 2009 at 09:15

Makes you went to sell the 5870 and crossfire two 5770's.

drunkenmaster · 6 Oct 2009 at 09:44

Lightnix said:
It seems to be heavily implied by AMD's marketing that it's a separate core:

http://anandtech.com/video/showdoc.aspx?i=3643&p=3

I'd also say it's evidenced by the fact that they say they need a cheaper to produce core, disabling SIMDs on Cypress does not achieve that - it just makes it run slower. It also kind of defies AMD's recent naming schemes to name two like chips completely differently (with the exception of the X2 parts). Also I've heard the figure 1.3 billion transistors for the Juniper part, which would fall about in line with the configurations we've seen.

Also, if this picture really is of Juniper, then judging by the bracket, the core is physically far smaller:

http://www.techpowerup.com/?102018

They aren't disabling WORKING simd's, but its a low yield process, meaning not many cores off the waifer actually all work, those that do, 5870's, those that almost everything works, 5850's, those that don't have 1440 working shaders, drop to the next level.

Its saving LOTS of money, because you can't sell a core with 1120 shaders working, as a 5870/5850. Meaning you either throw those cores out, or you sell them as lower end parts.

AT this stage, with awful yields its very unlikely they'd do either of two things, not come up with extra types of core to increase the number of salvaged cores, and 2, waste time on a lower profit part right now when demand for their £300/200 parts is so high and they only have a small amount of capacity at TSMC.

AS for the bracket, the bracket size is denoted by the componentry it has to fit around more than anything else. with 50% of the memory bus not connected, you have FAR less circuitry connected.

We might infact see two versions of the 5770, early cut down versions till yields are high, and eventually a actually physically smaller version with the same specs.

Remember the yields simply suck, not just because of core design, you'd be throwing out a lot of cores from a waifer with smaller cores on aswell, increasing yields by salvaging parts offsets low yields.

drunkenmaster · 6 Oct 2009 at 09:46

Martini1991 said:
Makes you went to sell the 5870 and crossfire two 5770's.

It will entirely depend, yes you'd have more shaders, but we've seen the 5870 isn't shader limited, as the 5850 performs the same at the same clocks. The extra shaders, with half the rops and half the bus, might perform worse, it might perform better, its a real unknown, largely because obviously, we don't know the specs.

EDIT:- the place that had it listed has promptly removed it, my guess, they were getting 10 due in today, someone on the website thought he'd put it up not realising it wasn't supposed to be due for sale just yet. So launch soonish, with stock on launch most likely.

krooton · 6 Oct 2009 at 13:06

How would it theoretically compare to a 4870?

HeX · 6 Oct 2009 at 13:11

Theoretically they should be faster as they have more shaders and run at higher clocks, memory bandwidth should be lower (due to 128bit vs 256bit bus), but not considerably so as their memory clock is far higher (4.8Ghz vs 3.6GHz).

krooton · 6 Oct 2009 at 13:21

HeX said:
Theoretically they should be faster as they have more shaders and run at higher clocks, memory bandwidth should be lower (due to 128bit vs 256bit bus), but not considerably so as their memory clock is far higher (4.8Ghz vs 3.6GHz).

Interesting... reckon the power consumption will be lower than the 58xx's?

gurusan · 6 Oct 2009 at 13:33

power consumption will be lower for sure

LoadsaMoney · 6 Oct 2009 at 15:10

These are the 4890/4870 replacements.

tindale · 6 Oct 2009 at 16:37

Interested in one of these, my 4870 is plenty powerful enough for me at the moment, and most games seem to be limited by having to be able to port to the consoles, so a similar card with a lot less heat and noise would be perfect.

Here's hoping for a good price.....

Shakeel · 6 Oct 2009 at 17:42

looking to be a decent card