有人注意到了嗎 ?
這老外使用的 DX11 測試軟體版本為 Unigine Heaven Benchmark
v1.1
而官方正式版本為 v1.0 =>
http://unigine.com/download/
這是為了 Fermi 生出的內部測試版本還是內有玄機
國外已有論壇在討論這個問題，不過目前還不清楚是什麼狀況 ...
The performance of the Geforce GTX-480 could not be less controversial, because they used a version not yet released DirectX 11 test Unigine Heaven, version 1.1,
which
is known by one of its creators that its performance numbers are not comparable with the previous version 1.0,
have been better optimized to have a performance 30% higher than its previous version.
http://www.overclockear.com/foro/showthread.php?t=3350&language=en
Well, the
development log on the unigine site says,
that they have improved tesselation performance by 30%, but AFAIK they haven't yet officially released an updated Heaven benchmark.
I guess thats what they are running. maybe even "optimized" drivers as well.
http://www.semiaccurate.com/forums/showpost.php?p=31960&postcount=13
v1.1 應該是內部測試版本
根據
development log還有
開發者的描述，新版本在Tessellation可提升30%的效能
=> "Tessellation optimization gives up to 30% performance boost"
而最新版本 2.0 會在
Game Developers Conference, San Francisco, 2010 展示
這是 NV 官方影片中的比較圖表
這是個人親自測試的圖表，測試設定與官方影片展示的設定一樣
全預設、無超頻
這是5850的測試，資料來源：
http://www.semiaccurate.com/forums/showpost.php?p=31986&postcount=15
GPU
Sapphire HD5850
GPU Clock 910MHz (stock 725MHz)
Memory Clock 1250MHz (stock 1000MHz)
Vcore 1.15V (stock 1.088V)
Heaven Settings (as shown in the video)
Version 1.0
Resolution 1920x1080
0xAA, 1xAF
All other settings default
=====================================
從以上三張圖表來看，可以歸納二點疑問
(1) NV 官方測試並未在 5870 上使用 v1.1 版本
(GTX480 採用 v1.1，造成效能對比上的落差)
(2) 5870 的 Tessellation 效能低落，無論是 v1.0 or v1.1 均無提升
=====================================
最後來個關閉Tessellation的測試 (5870測試圖來源：
http://itbbs.pconline.com.cn/diy/11079993.html)
GTX480 (請注意右下角Fraps顯示的"56fps")
HD5870 (850/1200MHz) (請注意左上角Fraps顯示的"57fps")
HD5870 (1GHz/1250MHz) (請注意左上角Fraps顯示的"66fps")
測試者提出的論點："沒有Tessellation的DX11遊戲，GTX480/512sp性能也就和默認5870大致相當"
(或者說是Tessellation少量應用的場景)
至於5870的Tessellation性能倒底是強還是弱，等GTX480/470上市，大量實測目前幾款DX11新遊戲就知道了
