Which GPU (7970) really does 720+ out of the box?

[snowcrashed]

I mine LTC on both sapphire and gigabyte (WF3) cards, and the gigabyte ones are infinitely better.

I get about 720khs per card (vs about 660 on the sapphires) with the following settings:

Core: 1045
Mem: 1500

Concurrency: 8192
Vectors: 1
GPU Threads: 2
Worksize: 256
Intensity: 13


I wish I had only bought the WF3 cards..

What card are those specs specifically referring to?  I'm curious as to how you are getting 720khs out of a card on Intensity 13/TC 8192.  

Side question, I have a Sapphire Vapor-X 7950 which I seem to peak at 630khs.  Would a comparable Gigabyte 7950 be that much of an upgrade on performance?

What that guy posted is a 7970. This is a thread about 7970's after all, not 7950's.

Which is why I said it was a side question and wasn't comparing his 7970 to my 7950.  I want to know which 7970 specifically.  And there's been talk about certain 7950s being better than others, I wanted to hear further on people's experiences with this.

[hasher87]

Im planning to get Sapphire HD7970 Vapor-X 3gb GHz edition

who has that kind of gpu and how's the hashrate of it so far?

[Eric Rye]

I have a Powercolor 7970 that gets 760 kh/s.

[sprint347]

I mine LTC on both sapphire and gigabyte (WF3) cards, and the gigabyte ones are infinitely better.

I get about 720khs per card (vs about 660 on the sapphires) with the following settings:

Core: 1045
Mem: 1500

Concurrency: 8192
Vectors: 1
GPU Threads: 2
Worksize: 256
Intensity: 13


I wish I had only bought the WF3 cards..

I could not get my Gigabyte 7970 OC stable past 600k after hours of tweaking, with your settings I'm sitting on 630+

Thanks!

[papaminer]

I have a Powercolor 7970 that gets 760 kh/s.

can you provide proof pls?

[computerparts]

Im planning to get Sapphire HD7970 Vapor-X 3gb GHz edition

who has that kind of gpu and how's the hashrate of it so far?

You will get 500kh/s on a good day.

[Eric Rye]

I have a Powercolor 7970 that gets 760 kh/s.

can you provide proof pls?

There's no such thing as proof, but the fact that other people are getting similar numbers here https://github.com/litecoin-project/litecoin/wiki/Mining-hardware-comparison#wiki-ATI_AMD_GPUs is pretty strong evidence.