佩迪巴德 佩迪巴德
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A饭可以笑了,待机40度的4850上场 果然不出我所料Powerplay的bios只需降频就可解决待机温度过高的问题。双敏推了个BIOS,可以200的核心频率待机(Powerplay)。HD4850不再烫手 双敏温控BIOS独家推出AMD逆袭之HD4850发布以来,以超越对手同级产品的性能和厚道的价格被广大游戏玩家所接受,唯一遗憾的就是由于HD4850散热器的设计和参数设定使得其在待机和满载状态下温度都超高,经常出现待机状态下达到80度以上的状态。重要原因之一就是公版HD4850的风扇转速设定过低,虽然达到了非常静音的效果,但散热能力大打折扣;另一个重要原因就是待机PowerPlay节能模式下核心及显存频率设定不够低,白白浪费了大把能量造成了发热过高,热滚滚的散热片被玩家戏称为可以煮面了! 过往解决显卡运行高温的方法不外乎两种,直接更换效能更强大的散热器,但成本高昂,不是所有玩家都能接受;其次就是通过驱动或者第三方软件来调节显卡散热风扇转速,换取性能和噪音的平衡。但由于HD4850刚刚发布,包括AMD官方催化剂8.6正式版驱动和权威第三方显卡调节软件Rivatuner、ATT等软件都不能对风扇转速进行调节,给广大玩家带来了极大不便! 作为AMD在国内最重要的合作伙伴,双敏电子是国内第一批供货HD4850显卡产品厂商,其无极HD4850玩家黄金版显卡完全按照公版规格打造,从元件选用和PCB布线等都非常用心。在获悉消费者不断反馈的HD4850高温情况后,双敏电子处于对用户负责的态度,积极联系AMD研发中心并结合自身强大技术能力,在各个销售HD4850的厂商中第一个推出了进化版BIOS,在散热风扇转速和PowerPlay节能模式频率上都有改善,大幅度降低了显卡运行中的温度,也使得双敏无极HD4850玩家黄金版成为目前市场上最凉快的HD4850产品,双敏独家公映! 原始版BIOS的PowerPlay节能模式核心和显存频率设定高达500/750MHz,其实并为降低多少,完全不能体现PowerPlay的价值,在用户2D操作中根本也用不到这么强大的性能,而风扇转速却只有满速的10%左右,即1300rpm上下。高频率芯片产生的大量热能和低速的散热风扇必然导致芯片温度极速上升,导致大部分HD4850待机温度即突破70度甚至80度! 以IBL(俗称小球)测试中,GPU负载接近80%,而核心显存频率也被拉升至625/993MHz(此处GPU-Z检测不准确),而风扇转速虽有提高,但也只有2800rpm上下,是满速的35%左右,核心温度飙升至83度!据了解,这样的温度在所有HD4850显卡中还属于比较低的,因为我们是在无机箱敞开环境下进行的测试,如果是普通用户放入机箱中运行,温度突破90度将非常“轻松”! 换用双敏为无极HD4850玩家黄金版推出的进化版BIOS后,待机模式下核心和显存频率已经大幅下降到了200/500MHz,最大程度体现了PowerPlay技术的精髓!同时风扇转速提高,在保持静音的同时提供有效的散热能力,核心温度被成功压制在了43度,较其它采用原版BIOS的HD4850显卡下降达31度!降低幅度达到42%! 在满载状态下,换用进化版BIOS的无极HD4850玩家黄金版温度也仅仅有54度,比采用原版BIOS的其它HD4850显卡待机温度还低20度!比满载状态更下降达29度,下降幅度达39%! PS:本次散热风扇转速设定在100% 状态,是想体现公版散热器的最大效能,实际上转速时可调节的,双敏电子在市售版本中已经设定了温控和静音平衡的参数设置,不过称该BIOS只适用于双敏无极HD4850玩家黄金版!
the verdict The VerdictAlright then, conclusion time.Let me be short and frank here. At 199 USD this is just a bitching nice product. By releasing the Radeon HD 4850 not only you get a very feature packed and stuffed product, you'll also purchase a product that is competing with a GeForce 9800 GTX really well. Now here's the thing that I just have to mention, NVIDIA at this very moment is issuing new optimized drivers and lowering prices of the GeForce 9800 GTX. In fact the standard GeForce 9800 GTX will cost 199 USD next week as well. Next to that at 229 USD they'll release a 9800 GTX+ edition that will match today's tested cards perfectly fine.You just gotta love the competition. But this is exactly what we need in the business .. competition drives sales, innovation and performance. This is so good for you as an end-user. Yours truly for a fact loves it.At this very moment, I'd pick up the Radeon HD 4850 for several reasons though. One of them is DX 10.1 support, the second one is slightly (on average) better performance. I'm seriously surprised to have witnessed what kind of performance this little 4850 pushes out. That's just extraordinary nice to see. Combine two of them in Crossfire and the dynamics change completely ... it can compete here and there even with a GeForce GTX 280 and that my friends is heaps of value at roughly 400 bucks. Mind you that next week I'll update the VGA charts where you can compare all SLI and crossfire results with each other. I know the update is requested a lot, yet I'm drowning my available time with all these new product launches.Back to the 4850 then, not everything about it is perfect though, sorry. The temperatures this card reaches are not really fun to observe, 80-85 Degrees C is normal for this card. Heat is dumped inside the PC due to the single slot cooler, and it certainly dumps a lot of heat. Thank gawd for board-partners with aftermarket coolers. Crossfire wise we always run into problems. This test-run was no difference. I had a couple of hangs, Frontlines: Fuel of War wouldn't even start in Crossfire mode and 3Dmark Vantage was showing some corruption. For some reason I always have stuff like that with Crossfire setups, though admittedly ... overall it did work really well and the scaling is just phenomenal.So I'm not going to make this conclusion any longer than needed. The Radeon HD series 4850 are just stuffed with good features and offers tremendous amount of performance for your bucks. Surely NVIDIA reacts by lowering the price on the GeForce 9800 GTX .. but mark my words, a month from now the Radeon HD 4850 will already sell for prices like 169 USD. And at this moment in time as a consumer it just can't get any better than this.True value and a great gaming experience. The mid-range graphics arena anno summer 2008 just got really exciting. Due to AMD unexpectedly lifting the NDA five days sooner than planned, we have not been able to go as in-depth in this review as we typically do. We returned with cards one day after AMDs press event, which was merely yesterday.Please, accept my apologies for that as this product could have used a little more in-detail writing. But I think you have a pretty good idea what kind of dynamic this product will bring to the market.Bloody nice, that's for sure.The two board-partners I'd like to thank for supplying a product at launch: the all new Force3D (give them a visit) and Guru3D regular, Powercolor, thank you guys for the support. Be sure to check out their products. It's quality stuff at a great price. Both vendors can take our 'Gaming Essential' award home. Force3D Radeon HD 4850 (info) USD 199,- PowerColor Radeon HD 4850 (info) USD 199,-With these words I'm closing this article for now, and soon the Radeon HD 4870 will be released. Obviously we'll report on that one as well.Leave/read comment on this product Sign up to receive a notice when we publish a new article Or go back to Guru3D's front page Thanks guys,Hilbert
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