AMD’s Radeon HD 6870 & 6850: Renewing Competition in the Mid-Range Market
by Ryan Smith on October 21, 2010 10:08 PM ESTThe last new game in our benchmark suite is Civilization 5, the latest incarnation in Firaxis Games’ series of turn-based strategy games. Civ 5 gives us an interesting look at things that not even RTSes can match, with a much weaker focus on shading in the game world, and a much greater focus on creating the geometry needed to bring such a world to life. In doing so it uses a slew of DirectX 11 technologies, including tessellation for said geometry and compute shaders for on-the-fly texture decompression.
It’s also one of the few games banned at AnandTech, as “one more turn” and article deadlines are rarely compatible.
Civ 5 has given us benchmark results that quite honestly we have yet to fully appreciate. A tight clustering of results would normally indicate that we’re CPU bound, but the multi-GPU results – particularly for the AMD cards – turns this concept on its head by improving performance by 47% anyhow. The most telling results however are found in the GTX 460 cards, where there’s a clear jump in performance going form the 768MB card to the 1GB card, and again from the 1GB card to the EVGA card. The 1GB GTX only improves on memory, memory bandwidth, and ROPs, greatly narrowing down the factors. No one factor can explain our results, but we believe we’re almost simultaneously memory and geometry bound.
With that in mind, this is clearly a game that benefits NVIDIA’s GPUs right now when we’re looking at single-GPU performance. This likely comes down to NVIDIA’s greater geometry capabilities, but we’re not willing to rule out drivers quite yet, particularly when a partially CPU-bound game comes in to play. In any case NVIDIA’s advantage leads to their wiping the floor with AMD here, as even the mere GTX 460 768MB can best a 5870, let alone the 6800 series.
Crossfire changes things up, but only because NVIDIA apparently does not have a SLI profile for Civ 5 at this time.
Facebook
Twitter
RSS
197 Comments
View All Comments
Super_Herb - Sunday, October 24, 2010 - link
I love it - "as a matter of policy we do not include overclocked cards on general reviews"..........but this time nVidia said pretty please so we did. But because our strict ethical policy doesn't allow us to include them we'll just tell you we did it this one special time because a manufacturer specifically sent us a special card and then our integrity is still 100% intact......right? Besides, the "special" card nVidia sent us was so shiny and pretty!Back to [H]ard to get the real story.
Super_Herb - Sunday, October 24, 2010 - link
I love it - "as a matter of policy we do not include overclocked cards on general reviews"..........but this time nVidia said pretty please so we did. But because our strict ethical policy doesn't allow us to include them we'll just tell you we did it this one special time because a manufacturer specifically sent us a special card and then our integrity is still 100% intact......right? Besides, the "special" card nVidia sent us was so shiny and pretty!Back to [H]ard to get the real story.
Super_Herb - Sunday, October 24, 2010 - link
I love it - "as a matter of policy we do not include overclocked cards on general reviews"..........but this time nVidia said pretty please so we did. But because our strict ethical policy doesn't allow us to include them we'll just tell you we did it this one special time because a manufacturer specifically sent us a special card and then our integrity is still 100% intact......right? Besides, the "special" card nVidia sent us was so shiny and pretty!Back to [H]ard to get the real story.
Super_Herb - Sunday, October 24, 2010 - link
"As a matter of policy we do not include overclocked cards on general reviews"..........but this time nVidia said pretty please so we did. But because our strict ethical policy doesn't allow us to include them we'll just tell you we did it this one special time because a manufacturer specifically sent us a special card and then our integrity is still 100% intact......right? Besides, the "special" card nVidia sent us was so shiny and pretty!Back to [H]ard to get the real story.
Will Robinson - Sunday, October 24, 2010 - link
Its amazing how many sites have used the FTW overclocked card as their NVDA comparison card.Think its a fluke?....even websites in Sweden were sent one with directions from NVDA to use it.....too bad the FTW card isn't even available in that country.....
mcnels1 - Sunday, October 24, 2010 - link
On the power use page, the article states :Because we use a 1200W PSU in our GPU test rig our PSU efficiency at idle is quite low, leading to the suppression of the actual difference between cards.
Actually, an inefficient power supply has the opposite effect, increasing the apparent difference. If the power supply were 100% efficient, then each additional watt used by the graphics card would show up as one additional measured watt used. But if the power supply is only 50% efficient, each additional watt used by the graphics card is measured as two additional watts.
JEEPMON - Sunday, October 24, 2010 - link
Please lose the 'Mexican Standoff' Just use standoff, much more professional and politically correct.Wolfpup - Monday, October 25, 2010 - link
Regarding texture filtering/mip map levels-is it possible this deficiency has existed since at least 2005 in AMD parts? I notice that in a LOT of Xbox 360 games.Sabresiberian - Monday, October 25, 2010 - link
I'm a gamer, video is a far second for me, but AMD just put the crown firmly on their head and if that's what I was after I'd be thrilled with these cards at these prices.;)
DarkUltra - Wednesday, October 27, 2010 - link
Have you checked in-game texture quality during motion? My GeForce GTX 285 have shimmering textures at max texture quality and 16xAF which are very noticeable when walking around in a game. As the GTX 285 have same type of AF quality, is this shimmering also present on the 480 or the 6870?http://www.youtube.com/watch?v=JVjM_vrsBO8