AMD HD7770 PR Stunt ?

Broken Hope · 14 Feb 2012 at 23:06

Official specs

TheRealDeal · 14 Feb 2012 at 23:13

These look pretty weak. I expected more like 6870 performance for the 7770.

Martini1991 · 14 Feb 2012 at 23:13

CAT-THE-FIFTH said:
Performance seems to be between an HD6850 1GB and HD6870 1GB:

http://www.techpowerup.com/160476/Radeon-HD-7770-Put-Through-3DMark-11.html

Except it won't.
In DX11, yes it will due to the advantage of the newer architecture, the majority of games will see it getting killed by the 6850.

coupe69 · 14 Feb 2012 at 23:15

So the same amount of texture units and ROPs as the 5770/6770, but less stream processors, less compute power and less memory bandwidth? Seems bizarre to me unless AMD are purely going for an 'Eco friendly' card? Can't see the faster core making up the perfomance lost via the aforementioned stats, unless of course I'm missing something :confused:

Martini1991 · 14 Feb 2012 at 23:16

coupe69 said:
So the same amount of texture units and ROPs as the 5770/6770, but less stream processors, less compute power and less memory bandwidth? Seems bizarre to me unless AMD are purely going for an 'Eco friendly' card? Can't see the faster core making up the perfomance lost via the aforementioned stats, unless of course I'm missing something

Different shaders.
The 6770 is a rebrand of the 5770 which uses different shaders.
Point in case the 6870 and 5850, the 6870 has a ton less shaders, but the 6870 is faster.

This card will be below the 6850, but make up ground in DX11.

Broken Hope · 14 Feb 2012 at 23:18

I'm assuming the die hard fanboys of the 7000 series will be in here soon, saying the 7700 series isn't overpriced when it's equal/beaten by the 6800 series and also more expensive.

Martini1991 · 14 Feb 2012 at 23:19

Broken Hope said:
I'm assuming the die hard fanboys of the 7000 series will be in here soon, saying the 7700 series isn't overpriced when it's equal/beaten by the 6800 series and also more expensive.

I wouldn't even call it equal.

coupe69 · 14 Feb 2012 at 23:22

Martini1991 said:
Different shaders.
The 6770 is a rebrand of the 5770 which uses different shaders.
Point in case the 6870 and 5850, the 6870 has a ton less shaders, but the 6870 is faster.

This card will be below the 6850, but make up ground in DX11.

I see, but do you think these different shaders are going to make up the other shortfalls I mentioned?

I thought the 6770 was essentially the same card as the 5770, didn't realise that it used different shaders?

Broken Hope · 14 Feb 2012 at 23:26

coupe69 said:
I see, but do you think these different shaders are going to make up the other shortfalls I mentioned?

I thought the 6770 was essentially the same card as the 5770, didn't realise that it used different shaders?

The 6770 and 5770 were the same card yes, what he was saying though is the 6800/5800 series had different shader counts but because 6800 shaders were more efficient they had almost the same performance with less shaders.

Martini1991 · 14 Feb 2012 at 23:26

coupe69 said:
I see, but do you think these different shaders are going to make up the other shortfalls I mentioned?

I thought the 6770 was essentially the same card as the 5770, didn't realise that it used different shaders?

Oh, I meant as in the 6770 used the old shaders (The ones the 5770 used) ergo, different to the 68XX series.

At 640 shaders at 1GHZ, it'll fall short of the 6850 in the majority of games, but have a foothold in DX11.

I don't think it's worth the asking price as a GTX560 or 6870 are much better buys.
Also, can't see the 7770 OC'ing *that* high percentage wise.

coupe69 · 14 Feb 2012 at 23:34

Martini1991 said:
Oh, I meant as in the 6770 used the old shaders (The ones the 5770 used) ergo, different to the 68XX series.

At 640 shaders at 1GHZ, it'll fall short of the 6850 in the majority of games, but have a foothold in DX11.

I don't think it's worth the asking price as a GTX560 or 6870 are much better buys.
Also, can't see the 7770 OC'ing *that* high percentage wise.

I thought there was a slip of the keyboard there

Yeah, I can't see it being much faster than the current 6770, even with it's more efficient shaders and higher core speed. About the only thing going for it, from what I can see, is it will be more economic to run.

Martini1991 · 14 Feb 2012 at 23:37

coupe69 said:
I thought there was a slip of the keyboard there

Yeah, I can't see it being much faster than the current 6770, even with it's more efficient shaders and higher core speed. About the only thing going for it, from what I can see, is it will be more economic to run.

It should be a fair bit faster than the 6770 and 5770 in DX11 app's. In the majority of stuff, while it'll be a fair bit faster, it's not worth the much higher asking price.
I bought 5770's at 120 a shot back in 2009.

coupe69 · 14 Feb 2012 at 23:41

Martini1991 said:
It should be a fair bit faster than the 6770 and 5770 in DX11 app's.

You reckon? You could be right I guess, it'll be interesting to see the benchmarks that's for sure.

Martini1991 · 14 Feb 2012 at 23:51

coupe69 said:
You reckon? You could be right I guess, it'll be interesting to see the benchmarks that's for sure.

Well, the real improvement I see in my 7950 is DX11 performance, the 7770 should follow that, so in DX11 the 7770 will be much better than the 6770 and 5770.
But I'd never say any of them would give good enough DX11 performance anyway.

CAT-THE-FIFTH · 15 Feb 2012 at 01:08

There is no excuse for this card not to at least match an HD6850 1GB IMHO. Its not bus powered,so there is no design limitation in this regard.

Martini1991 · 15 Feb 2012 at 01:10

4 hours till fail.

Broken Hope · 15 Feb 2012 at 01:15

The cards will be fairly good, it's just as usual for the 7000 series so far, the pricing is way off. £120 for the 7770 is stupid, if it was around £75-80 it would be fine.

CAT-THE-FIFTH · 15 Feb 2012 at 01:15

However,even the HD5770 1GB was not that great at launch either. The major improvements it brought were much lower power consumption and DX11.

When it launched the HD4870 1GB could be had for less and was generally faster :

http://www.anandtech.com/show/2856/5

The HD5770 1GB was around £113 to £145 at launch - HD4870 1GB cards could be picked up for as little as around £90 IIRC.

It didn't help that the GTS450 was a rather damp squib too.

Martini1991 · 15 Feb 2012 at 01:18

CAT-THE-FIFTH said:
However,even the HD5770 1GB was not that great at launch either. The major improvements it brought were much lower power consumption and DX11.

When it launched the HD4870 1GB could be had for less and was generally faster :

http://www.anandtech.com/show/2856/5

The 4870 wasn't that much faster than the 5770 though, they traded blows in the majority of app's.
Also, don't cherry pick benchmarks. It's lame as hell.

Also, the 7770 is a double generation skip.

The 7770 is struggling to keep upto a 6850, while being a decent 30% more expensive (100 quid models of the 6850, even 90 quid models, and 130 quid models of the 7770)

CAT-THE-FIFTH · 15 Feb 2012 at 01:25

Martini1991 said:
The 4870 wasn't that much faster than the 5770 though, they traded blows in the majority of app's.
Also, don't cherry pick benchmarks. It's lame as hell.
Also, the 7770 is a double generation skip.

But yeah, the 5770 wasn't that good at launch, but it certainly wasn't as bad as the 7770 will be.
The 7770 is struggling to keep upto a 6850, while being a decent 30% more expensive (100 quid models of the 6850, even 90 quid models, and 130 quid models of the 7770)

If you look at my previous post(which I just edited),the HD5770 1GB launched at between £113 to £145 and HD4870 1GB cards could be had for as little as £90.

The Anandtech review shows a much bigger variance though than the TPU review and its in favour of the HD4870 1GB overall.

The thing is though,there is no excuse for it to be slower than an HD6850 1GB. I don't see power consumption or TDP being the issue here. Still there is going to be a large gap between the HD7770 and HD7850 then,if the HD6850 is around HD6790 level speed.