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Roughly a month after ATI, graphics business unit of Advanced Micro Devices, unveiled its ATI Radeon HD 4890 (RV790) graphics processing unit (GPU) and implied on its high overclocking potential, several leading makers of graphics cards started to show off their products featuring RV790 operating at a rather unprecedented 1GHz (or close) clock-speeds.

Massively factory-overclocked graphics cards are nothing new for the market, as they have been available for years, but this time MicroStar International, PowerColor and Sapphire Technology are hitting “magical” 1GHz milestone with a high-performance graphics chip. Considering that the default frequency of the RV790 is 850MHz, 1000MHz version should provide rather substantial performance boost, but is also likely to cost considerably more than standard flavours, which retail for about $249.

PowerColor, a well known supplier of graphics adapters, has already released its PowerColor PCS+ HD4890 graphics card with 950MHz graphics processor, 4400GHz memory frequency and special cooling solution from Zerotherm. There are talks that the company may boost clock-speed of the GPU to 1000MHz with some additional tweaks.

Sapphire Technology, which is the largest producer of ATI-based graphics adapters, is about to release its Sapphire Radeon HD 4890 Atomic with 1GHz graphics processor as well as 4200GHz memory. The “Atomic” will utilize special vapor chamber cooling system to keep the core cool enough to remain stable.

There is also chatter about special edition ATI Radeon HD 4890 graphics boards from other manufacturers, such as XFX, which will also be able to boast with 1GHz core clock-speed.

ATI RV790 graphics processing unit features 800 stream processors, 40 texture units, 16 render back ends as well as 256-bit memory bus compatible with GDDR3, GDDR4 and GDDR5 memory types. The RV790 chip is designed from the ground up to achieve considerably higher clock-speeds compared to reference 850MHz without loss of stability or degradation.

Tags: ATI, AMD, Radeon, RV790, 55nm


Comments currently: 3
Discussion started: 05/08/09 12:43:30 PM
Latest comment: 05/11/09 04:19:37 PM
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The 9600 GT could overclock to 800 MHz in a lot of cases, I got mine up to 780 and considering that the stock speeds are 650 that's actually a more impressive overclock percentage wise, the hype is just that this card is hitting a "magical" number. whatever, it's another overclockable card.

Kudos to ATI for a fast card. seems a little overblown to me though.
0 0 [Posted by: somidiot  | Date: 05/08/09 12:43:30 PM]
- collapse thread

Do not forget that the RV790 is a lot more complex chip than the 9600GT GPU. Therefore, first it generates a lot more heat as clocks increase and second it increase raw performance per clock at a higher rate than the 9600GT.
BTW I have my 8800GT hitting 720MHz from the standard 600MHz with a shitty dual slot cooler and a bios flush. With a fancy cooler like the ones on these "magical" number 4890s I could easily go 750-780. However I do not think the performance GAIN will match that of the OC RV790s.
0 0 [Posted by: jonup  | Date: 05/11/09 12:36:23 AM]
I see that some want to explain how "magical" is performance gain on OCed rv790 that cant be compared to the other cards. Yep it's a big chip and HUGE POWER CONSUMER even in idle and without "massive OC". I agree that isn't any near "percentage gain" of 8800gts-g92 and 9600gt. Also let's nont forget that even older sis' rv770 could reach 950MHz up on Diamond XOC
[url=http://www.xtremesys...tremesystems....393&a mp;postcount=24[/url]

So it's really nothing new except much huger consumption :/ Well it's a terahertz :p
0 0 [Posted by: OmegaHuman  | Date: 05/11/09 04:19:37 PM]


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