http://www.legitreviews.com/article/732/1/

The NVIDIA GeForce 9800 GTX+ graphics card was and still is a hot subject around the internet since it was announced by NVIDIA this past Thursday. The card will not be available to purchase until next month, so enthusiasts and gamers will have to wait for it to arrive if they want one. Many are asking if it is worth the wait as the ATI Radeon HD 4850 is available to purchase today for a reasonable $169.99 plus shipping over at Newegg thanks to a $30 mail-in-rebate. The MSRP on the GeForce 9800 GTX+ is $229, so is the GeForce 9800 GTX+ carries a 35% price premium on top the fact you have to wait to buy one. Our own performance testing showed that the GeForce 9800 GTX+ had a 10.4% performance advantage over the Radeon HD 4850 as you can below.

It seems most of the review sites around the web show the GeForce 9800 GTX+ about 10-15% faster than the Radeon HD 4850, but it really depends on what applications are tested and the platform being used. The performance lead by the GeForce 9800 GTX+ is nice, but does it justify the higher price if you are looking to just game?

Little detail is known about the new 55nm 'refresh' of the G92 core that is being used on the GeForce 9800 GTX+, so it's tough to know what exactly NVIDIA did.  Our sources inside NVIDA claim that they did nothing more than shrink down the G92 and didn't do too much polishing. We've asked NVIDIA to provide some power specifications for the new core and haven't been given anything solid yet. The ballpark figure that we were tossed is that the GeForce 9800 GTX+ TDP is within 10-15W of the standard GeForce 9800 GTX and that it is certainly below 180W. The one area that is still unknown is overclocking performance.  The original GeForce 9800 GTX was found to be a good overclocker when we last looked at it in April 2008. Let's take a look and see what this new card can really do when pushed to the limits.

Overclocking The Card

On the original GeForce 9800 GTX, we were able to take the core from 675MHz all the way up to 800MHz and the memory from 1100MHz to 1200MHz with little effort. The most impressive part of the overclock though was the improvement on the shaders. We were able to overclock the shaders from 1688MHz to an impressive 2025MHz! This is what could be expected from the 65nm version of the G92 core on the GeForce 9800 GTX. The GDDR3 memory IC's on our original GeForce 9800 GTX card were Samsung K4J52324QE-BJ08.

With the new 55nm core the default clock speeds on the core and shaders are higher, but the memory cock frequency remains the same. The question that many are wanting to know is how far can this core go with the new die shrink. It seems some are expecting the die shrink to really raise the bar! The highest settings we could get stable with the GeForce 9800 GTX+ were 855MHz on the core and 2200MHz on the shaders. That is 55MHz higher on the core and 175MHz higher on the shaders than what we could reach on the old 65nm G92 core. For those that like percentages the overclock is roughly 6% higher on the core and 8% more on the shaders, which is significant, but nothing over the top. Usually with die shrinks overclocking performance stays close to the same, even more so when no major architecture changes are made.

It should be noted that the memory overclocked better on the GeForce 9800 GTX+ and it seems NVIDIA has moved over to Hynix branded GDDR3 memory ICs. The GDDR3 memory IC's on the new GeForce 9800 GTX+ card were Hynix H5RS5223CFR-N2C, which are rated 1200 MHz (GDDR3-2400) 0.8NS with 1.5V. These are the same memory IC's that were found on the GeForce GTX 280 cards we reviewed last week.

The core on the GeForce 9800 GTX+ does overclock better than the original GeForce 9800 GTX cards and to top it off it has different branded GDDR3 memory that also overclocks better!

The Video Cards:

• Sapphire Radeon HD 4850 (625MHz/1986MHz GDDR3)
• NVIDIA GeForce 9800 GTX+ (738MHz/2200MHz GDDR3)
• EVGA GeForce GTX 280 Hydro Copper 16 (670MHz/2430MHz)
• PNY GeForce GTX 280 (602MHz/2214MHz)
• XFX GeForce 9800 GX2 (600MHz/2000MHz)
• XFX GeForce 8800 GTX 768MB
• DiamondRadeon HD 3870 X2 - 1GB (825MHz/1.800GHz GDDR3)

The test system was running Windows Vista Ultimate 64-bit with all available Microsoft updates including the hotfixes required for enthusiast video cards to run correctly. ATI CATALYST 8.5 drivers was used on the Radeon HD 3870 X2 graphics card and ATI CATALYST 8.6 drivers were used on the nw Radeon HD 4850 graphics card. NVIDIA Forceware 175.16 WHQL drivers were used on all GeForce graphics cards except for the GeForce GTX 280 series cards as they used Forceware 177.34 drivers and the GeForce 9800 GTX+ that used Forceware 177.39 graphics drivers.  All results shown in the charts are averages of at least three runs from each game or application used

Intel Test Platform
Component	Brand/Model	Live Pricing
Processor	Intel Core 2 Quad QX9770	Click Here
Motherboard	Gigabyte X38-DQ6	Click Here
Memory	4GB Corsair PC2-9136C5	Click Here
Video Cards	See Above	Click Here
Hard Drive	Western Digital SATA RaptorX	Click Here
Cooling	Corsair Nautilus 500	Click Here
Power Supply	Corsair HX620W	Click Here
Operating System	Windows Vista Ultimate	Click Here

什么时候9800GTX+卖1599啊？

不错的东西，如果价格和4850差不多肯定首选的（每个论坛都顶你一次）