RussianSensation
Elite Member
- Sep 5, 2003
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I might be remembering wrong, but aren't you overstating the 4890 -> 5870 performance increase?
Well 4890 was a refresh to 4870 so I think I should have stated 5870 vs. 4870 and 6970 vs. 4890. In that case 75-100% performance difference is still there, respectively. But ya, 5870 vs. 4890 was slightly less than 75% overall, closer to 60% faster.
HD6770 ~ HD5770 ~ HD4870.
HD5870 ~ HD6950
Looking at modern games:
http://www.computerbase.de/artikel/grafikkarten/2011/test-19-grafikkarten/4/
6950 1GB is 75% faster than HD6770 on average.
6970 2GB is 85% faster than HD6790 on average.
I don't see the point of linking "all resolutions" from TPU as relevant.
How about HD5870 vs. HD4870/4890 in games at 1920x1080 or higher:
1. Starcraft II => 2x faster than 4890
2. Mafia II => 2x faster than 4890
3. Call of Duty: Black Ops => 2x faster than 4890
4. Brink => 2x faster than HD6770 ~ HD5770 ~ 4870
5. Medal of Honor => 78% faster than HD5770 ~ HD4870
6. Avatar => 79% faster than 4870
7. BF:BC2 => 78% faster than 4870
8. AvP => 79% faster than 4870
9. Bioshock 2 => 78% faster than 4870
10. STALKER: COP => 82% faster than 4870
11. Shattered Horizon => 77% faster than 4870
12. Napoleon Total War => 78% faster than 4870
13. Just Cause 2 => 75% vs. 4870
14. GTA IV = 83% faster vs. 4870
There are at least 10 pages of benchmarks here.
On average HD5870 is at least 75% faster than HD4870 and HD6970 (refresh of 5870) is also at least 75% faster on average vs. HD4890. So HD7970 would need to be about 70-75% faster than HD5870 to be in line with what's expected imo.
But I am more upset that AMD isn't really increasing performance much in the mid-range. We had have nearly HD5850 level of performance for 2 years now (HD6870 was barely faster and it looks like HD7870 won't be faster than an overclocked 5850). That's pretty disappointing to me. While HD7950/70 cards will be a good deal faster, the mid-range continues to be lackluster, if these rumors are true.
HD6970 = 880mhz x 32 ROPs = 28.16 GPixels/sec pixel fill-rate
HD7970 = 1000mhz x 64 ROPs = 64.0 GPixels/sec (> 2x) That's a humongous increase in pixel fill-rate.
Still, if HD7970 is only 50% faster than HD6970, then how is AMD going to compete against Kepler with that? GTX580 is another 15% faster than HD6970 to begin with and Kepler is expected to be a massive performance increase over Fermi. Also, the entire HD7850/70 and lower end line-up seem to be re-badges of current generation chips, only at 28nm. I am not buying it. Seems way too conservative approach by AMD.
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