Topic: Why is the 6770 such a poor performer? (Read 1386 times)
never uesed a 6770 but i have had one of my 5770 clocked at 1050 core pulling 230mh/s not bad for a card i bought for $60 usd uesed a year ago
6770 is the exact same hardware as a 5770, which has the same number of shaders as a 4870. That being 800.
open up gpu-z and see how many it has.
If where you bought it from stated how many SP it had and was wrong that could be a reason to return it and get another card.
If where you bought it from stated how many SP it had and was wrong that could be a reason to return it and get another card.
Ah, I guess the article I was reading misquoted the number of SPs, that'd make sense then.
As far as I know, the HD6770 has only 800 stream processors, while HD5870 is having 1600 of them.
Was browsing around at cards, and noticed the specs for the radeon 6770 lists it as having 320x4 stream processors clocked at 900MHz at default. This compared to say a 5870 which has 320x5 stream processors clocked at 850MHz. As I've been told that SPs are more or less what makes the hash happen, a quick calc puts a 6770 at 80% of the hashing power of a 5870, or around 330MHash/sec. Why then is it that it looks to be pulling barely 200MHash/sec from the hardware lists?
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