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GTX 275 versus HD 4890
Continuation: Review: Ati Radeon HD 4890 versus Nvidia Geforce GTX 275


Radeon HD 4890: Overclocking
Geforce GTX 275: Maximal OC frequency at maximal fan speed
 
Geforce GTX 275: Maximal OC frequency at maximal fan speed [Source: view picture gallery]
Up to now we have three HD 4890s, all of which have AMD's default design: The Sapphire Radeon HD 4890 (default frequencies), the Asus EAH4890 (default frequencies) and the His Radeon HD 4890 (OC version with 900/1,000 MHz). Although there have been several reports of cards running stable at 1,000 MHz core clock speed, we can't confirm those rumors with these three cards. All of them quite over 950 /1,100 (2,200) MHz. Nevertheless the results are quite good given the fact that the best samples of the HD 4870 (RV770) quit at about 850 MHz.

AMD leaves the decision concerning the power supply (almost) fully to the board partners. All of our samples had two 6-pin power connectors but there are said to be versions with one 6-pin and one 8-pin connector, too. The latter one makes a higher TDP possible and thus paves the way for higher frequencies and voltages - the new cooling solution appears to be ready. We are waiting for more retail cards and will keep you up-to-date in the matter.

Geforce GTX 275: Overclocking
Our Nvidia reference sample of the GTX 275 offers similar overclocking capabilities as the other GTX 200 cards. To check the maximum re manually set the fan speed to 100 percent. This way our sample runs 3DMark 06 with 702/1,566/1,296 MHz (default: 633/1,404/1,296) and is almost 10 percent faster than before. As soon as we had the chance to test several retail cards we will rate the general overclocking capabilities of the GTX 275.




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Author: Vötter, Sauter (Apr 02, 2009)






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Comments (8)

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Hyperhorn Re: Review: Ati Radeon HD 4890 versus Nvidia Geforce GTX 275
Admin/Spambot-Killer
03.04.2009 16:30
...and don`t forget the memory interface (448 vs. 512 Bit) also. In 1280 x 1024 and 1680 x 1050 the GTX 275 is very close to the GTX 285, but then at 1920 x 1200 the difference gets bigger. But in 2560 x 1600 the difference isn`t that big as you might expect, when you compare the previor settings. Fallout 3 is a good example.
Yapa Re: Review: Ati Radeon HD 4890 versus Nvidia Geforce GTX 275
Senior Member
03.04.2009 16:05
hmm not sure how you guys are looking at the results, but to me the GTX275 wins on performance more times than the 4890.
I'm looking at the 1680x1050 resolution mainly... but I just looked through all the benchmarks at 1920x1200 and yes the 4890 comes out in front a few times more because of its extra memory... but its still the GTX275 to win in many at that res.

The only game that the 4890 really shines in is GRID... and that has always been the case for ATI. Crysis also benefits at 1920x1200 from the 4890's larger memory.

Also remember the 4890 OC is an overclocked card, they did not show an overclocked GTX275.

Kristoffer:
hehe very true, hope you get another GTX275 soon

Yapa
pcghx_Kristoffer Re: Review: Ati Radeon HD 4890 versus Nvidia Geforce GTX 275
Administrator
03.04.2009 13:32
Quote: (Originally Posted by Yapa)
Any chance of SLI / CF followup? Yapa


We are currently running some HD 4890 CF benchmarks, so stay tuned. As the GTX 275 is regarded, we would have a hard time trying to get SLI running since we only have one card at the moment

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