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7800GTX 512MB hits the street on 14th ! - 11/4/2005 10:10:21 AM   
SiliconFreak


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Joined: 7/4/2003
From: Melbourne, Victoria, AUS
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True 7800Ultra coming your way... with PS3-style GPU clock...

After a little research we managed to get information from several retailers and e-tailers. The 7800GTX 512MB is already SKUed [Yes, we've turned Stock Keeping Unit into a verb, Ed.], and the delivery date is set for Monday, November 14th. Several Nvidia partners told us about shipping boards in full quantity in week 46, so it seems like X1800XT got competition even before it has shipped into retail.

Back in July, we have reported here that little NV47 chip had far more juice than relatively modest clock speed of original GTX. The Green Goblin launched its 7800 series over five months before Captain Canuck gave an answer in the sight of X1K series - it was more than obvious that Nvidia kept silent about the true capabilities of the NV47/G70 chip.

However, we have managed to see some boards dubbed "Faster G70 with 512MB", which were clocking to heavens high.

One board even had the GPU clocked to sky-high 800 MHz, which sent shivers down my spine. 110 nano process doing 800 MHz clock? Vulcans would say "highly illogical", but we didn't care at the time and decided to trust our very eyes instead of sources who claimed differently.

In September, some reps even claimed that the product was cancelled. In the end - all stories come true.

The supposedly cancelled UItra was simply re-named to 7800GTX 512MB. While I personally feel this is a crap name and devalues of this product, I'll leave this to Nvidia's marchitecture pandits, minions and spinners. This is the 7800Ultra, no matter how it is called now. The price is set at $599 to $649, € or £400 much more expensive than X1800XT, but Nvidia believes it has a reason to keep the price sky-high.

The new G71 or "Faster G70" is a pure thoroughbred. If you remove the cooling solution which was introduced with Quadro FX 4500, you'll see that Nvidia modified the PCB (Printed Circuit Board) a bit in order to fit spanking new 1.1ns Samsung GDDR3 modules, which will be clocked between 800 and 900MHz.

Since the memory is declared to work at 909MHz, you can expect some serious overclocking there, and passing the once unimaginable 60GB/s barrier. Don't be too suprised if you see enthusiast forums boiling with reports of 1GHz memory clock soon after introduction.

However, the show isn't stopping here - some manufacturers decided to clock the GPU higher and lowered the speed of the memory to keep the board stable in volume production. Of course, if you get a jackpot sample, you can expect GPU core easily surpassing the 600 MHz mark and it will be truly interesting to see how will 16-pipe R520XT cope with "Faster G70 with 512MB" at the same GPU clock speed, as we reported over four months ago.

You can be for sure that at least three "usual suspects" will do tango dancing with the clocks: Gainwards "Golden Sample", eVGA "KO" and BFG "OC" series - Green Goblin's minions were desperately trying to keep things quiet, but retailers/e-tailers had horrible time with 6800Ultra availability and info is leaking onto the Internet in true Niagara Falls style.

The other two companies that changed reference clocks are XFX and LeadTek, but you can be sure they're not the only ones. Default clocks are set at 550/1800MHz, and every manufacturer can choose a variation. Do not expect these boards to have a single-slot cooling, since that would be close to suicide.

All that we can say is: 7800Ultra will be a truly remarkable product. For 1080p and 1900x1200 monitor users who want Transparency AntiAliasing and Anisotropic Filtering cracked to the max.


Source : TheInquirer
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