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继高端的RV770 Radeon HD 4800系列之后，AMD今天又正式发布了面向主流市场的RV730 Radeon HD4600系列显卡，包括Radeon HD 4670和Radeon HD4650两款，都号称可以在功耗不超过一个标准灯泡的情况下提供出色的3D游戏和高清多媒体体验。
Radeon HD 4670/4650的核心都基于AMDTeraScale图形引擎，第二代55nm工艺制造，集成5.14亿个晶体管(1.4倍于RV635)，核心面积146平方毫米(1.2倍于RV635)，配置320个流处理器(2.7倍于RV635)、8个ROP单元、32个纹理单元，128-bit位宽，最大带宽32GB/s(1.25倍于RV635)。
当然，DX10.1、SM4.1、UVD 2.0、PowerPlay 2.0、CrossFireX等特性也都继承了下来。
Radeon HD 4670显卡核心频率750MHz，搭配512MB或1GB GDDR3显存，等效频率2000MHz和1800MHz，8层PCB板，整卡功耗59W，无需外接电源。该卡浮点计算能力480GFlops。
Radeon HD 4650显卡核心频率600MHz，搭配512MB GDDR2显存，频率1000MHz，8层PCB板，整卡功耗48W。
Radeon HD 4670 512MB GDDR3建议零售价79美元，立即上市，而1GB GDDR3版本将在本月底供货；Radeon HD4650 512MB GDDR2建议零售价69美元，本月底上市。华硕、帝盟、技嘉、杰微、微星、同德、迪兰恒进、蓝宝、Club2D、Force3D、GeCube、HIS、VisionTek等都会推出相关产品。
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9600GSOow we get into the real competition. We're looking atAMD'snewest mainstream card vs. NVIDIA's two latest entries into thesub$100 market. The 9600 GSO is just an 8800 GS. Though we didn'tcompareit here, the 9600 GT is priced right around $100 and offersperformancea little better than the 9600 GSO. While we are comparingthe 9500 GThere, it will become quickly apparent that the card doesn'teven comeclose to competing with the 4670. For our medium qualityCrysis test,the 4670 seems framelimited at about 60 here, while the9600 GSO seemsto push past the 60 fps barrier. At 1280x1024 and above,the 4670 leadsthe pack in this benchmark.
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Enemy Territory with 4xAA enabled shows a huge advantage for the4670over NVIDIA's more expensive 9600 GSO. Even so, the NVIDIA cardsremainplayable at 1280x1024, so the practical advantage is a littledecreaseduntil we get to 1680x1050.
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Once again oblivion offers us a role reversal when AA isenabled.Without AA, the 4670 falls behind at above 1024x768, while itpulls alittle ahead when 4xAA is enabled. Again, the 4670 and 9600 GSOareplayable at 1280x1024 with AA, and might both be passable at1680x1050as well (oblivion is a game that still overs a good experienceatanything above 25 fps).
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The 9600 GSO maintains a steady lead over the 4670 in Age of Conan.Thisis quite an interesting benchmark for NVIDIA to lead considering howhandily they are clobbered at higher price points by the 4850 and 4870.
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Performance in GRID is nearly identical between the 4670 and 9600 GSO.
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Throw AA in there and we see a little separation trying to happen,butthe 9600 GSO actually does keep up at lower resolutions with AA.
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For The Witcher, while the 4670 leads at lower resolutions,performanceconverges at higher res. Both are playable at 1280x1024. Wewanted totest AA in this one, but it is sort of difficult as the gamelimits theability to enable AA based on framebuffer sizes. thus wecouldn'tenable 4xAA past 1024x768 on the 9600 GSO.
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When we hit high quality Crysis, the 4670 leads.
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And the lead just gets bigger if we look at medium quality (highqualityshaders) with 4xAA enabled. The 4670 is borderline playable inthissituation at 1280x1024 while the 9600 GSO falls way short.
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[ 本帖最后由 wwfcode007 于 2008-9-10 17:22 编辑 ] |
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