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AMD Radeon HD 6850公版外观大图赏
▲AMD Radeon HD 6850公版▲AMD Radeon HD 6850公版▲AMD Radeon HD 6850公版▲AMD Radeon HD 6850公版▲AMD Radeon HD 6850公版　　AMD Radeon HD 6850公版同样被打做成正正方方的，同样是涡轮散热器的设计，但是在导风罩的上方则开出了一排用于散热的窗口。公版的输出接口为：2*Mini DisplayPort+HDMI+2*DVI。▲公版HD6850正反PCB裸板▲Barts核心照　　核心方面，AMD Radeon HD 6850采用基于40nm工艺制程制作的Barts显示核心，核心内建960个Streaming Processor流处理单元，32个光栅处理器和48个纹理单元。支持DirectX 11和Shader Model 5.0技术，支持4屏输出和CrossFire技术，并且支持AMD独有的Powerplay自动节能技术。▲现代T2C高速DDR5显存颗粒　　显存方面，AMD Radeon HD 6850采用了现代的T2C高速GDDR5显示核心，正面8颗组成了Bit的显存规格，默认频率为775/4000Mhz，显存带宽为128.0Gb/s。▲I/O协同供电和CorssFire接口▲4+1相供电设计▲CHL相PWM主控▲uP6122驱动IC　　供电方面，AMD Radeon HD 6850采用了4+1+1相的分离式供电设计，其中4相为核心供电，1相为显存供电，最后1相为I/O协同供电。其中核心供电方面一个Magic R19铁素体电感+59910M的芯片组成一路供电，笔者估计此款芯片为DrMOS芯片。AMD Radeon HD 6850A散热器拆解▲显存与DrMOS一体式散热背板　　拆开散热器后发现，显存与DrMOS上装置了一体式的散热背板，用于散热与固定PCB。▲涡轮风扇+Vapor-x均热板散热器，整体做型与HD5770的散热如出一辙▲Vapor-x均热板散热器主体▲散热鳍片▲0.7A的涡轮风扇▲导风罩+Vapor-x均热板+涡轮风扇　　散热方面，整体上的设计与HD5770的散热器基本一样，同样的是涡轮散热器。散热主体为Vapor-x散热器，有效地把核心的热量迅速传递到散热器鳍片上，再配全0.7A的滑轮散热器，整体的散热效果不错。但唯一的缺点是满载时候的噪音会较大。▲接口做了全金属屏蔽▲2*Mini DisplayPort+HDMI+2*DVI输出接口　　输出接口方面，AMD Radeon HD 6850公版与HD6870公版的输出接口一至，同样是2*Mini DisplayPort+HDMI+2*DVI，支持AMD的4屏Eyefinity。
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已有条评论ATI Radeon HD 6850 1GB ReviewManufacturer
UK price (as reviewed) Around &150 (inc VAT)
US price (as reviewed) Around $200 (exc tax)
Like the Sith, graphics cards tend to come in twos with a more a mighty card and a lesser, cheaper alternative - the HD 6850 is the Darth Maul to Palpatine’s HD 6870. While the HD 6860 is slated to drop into shops at &150, a hefty &50 less than the HD 6870 yet it’s based on the same fundamental architecture. However, the seemingly minor changes are actually quite significant - the HD 6850 drops two SIMD engines, or 160 stream processors, and 125MHz of frequency. The cheaper HD 6850 still retains a 256-bit memory interface, 32 ROPs and 1GB of GDDR5 memory even if those chips do run at 4GHz rather than 4.2GHz.
With the price cuts and specification reductions, the HD 6850 squares up against an Nvidia GeForce GTX 460 1GB, and if you just want to find out how the card fares, you can skip to our . We’d advise this if you’ve already read our HD 6870 article from start to finish, as we’re only going to go over information that you already know. You can thank us for this kind consideration in the forums!
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A New Naming SchemeUnlike previous launches, the HD 6000-series opens with the mid-range Barts Pro and Barts XT GPU pairing, despite the historically high-end name. While the HD 5800 was a high-end GPU, and HD 5900 denoted a dual-GPU card, the HD 6850 1GB and HD 6870 1GB are pitched at around &150 and &200 respectively. There will be a HD 6900 card in a month’s time, based around a faster GPU, with a dual-GPU HD 6900 also planned.
Hopefully you’ve stayed with us, and not headed straight off to the forums to flame ATI’s marketing team - we say this because the new naming scheme does make sense, once you accept the situation that ATI was in. The crux of the problem was that TSMC, ATI’s fabrication partner, couldn’t deliver the 32nm manufacturing process that ATI had been betting on. As the smaller process would have allowed ATI to decrease the cost per GPU die (while also potentially allowing higher clock speeds and lower power consumption), it couldn’t deliver a Barts GPU at the &100 to &130 price point it would have wanted.
Rather than leave this hotly contested and highly profitable section of the market barren of ATI choice, ATI has chosen to continue making and selling the Radeon HD 5700. However, ATI won’t rename this range as the HD 6700 series - we suspect that some of the stories on the internet about this proposed move were leaked by ATI and used to judge whether such a re-branding move would be received badly or not.
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Whatever the reason, ATI was in the position that it didn’t have a new GPU that would hit the &100-150 sweet spot and would have to continue selling a part called a Radeon HD 5700. Calling the new GPUs the HD 6700 series would have killed HD 5700 sales, so Barts therefore had to be called a HD 6800 GPU - it was the most logically choice and we think the best option given the awkward situation.
This could mean that we'll see some surprises in the HD 6900 range - will the single-GPU parts be called HD 6930 and HD 6950 with the dual-GPU card a HD 6990? ATI has said previously that it worried that the difference in name between a single-GPU HD 3870 and a dual-GPU HD 3890 wasn’t enough to justify the large price difference, the amount of hardware you were buying or the vast potential performance on offer. We have no indication as to how the HD 6900 will be branded - this is just conjecture.
We’re as interested as ATI is in what your thoughts are on the matter of the naming change - head over to the forums, unless you want to get into the
1 - ATI Radeon HD 6850 1GB Review
2 - Radeon HD 6850 1GB Specifications
3 - Radeon HD 6850 New Features, Improvements and 3D
4 - Radeon HD 6850 Test Setup
5 - Radeon HD 6850 Dirt 2 Performance
6 - Radeon HD 6850 Arma II: Operation Arrowhead Performance
7 - Radeon HD 6850 Just Cause 2 Performance
8 - Radeon HD 6850 Bad Company 2 Performance
9 - Radeon HD 6850 Power Consumption and Thermals
10 - Radeon HD 6850 Performance Analysis
11 - Radeon HD 6850 Value and Conclusion
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