AMD To Launch Radeon HD4890 "RV790" In April

**Macadamia** · 03-09-2009, 07:09 AM

Originally Posted by blindbox

True to that. It may be launched as silently as the RV770.

Oh, first post btw

Y HALLO THAR.
Finding Lowyat a little too crude for your tastes?

Anyway I think 800SPs might GASP- be adequate.

What about texture units? Everyone has been so blind on the SP count that they forgot this.

**largon** · 03-09-2009, 07:29 AM

Hornet331,
The thing with RV770's idle consumption is, GDDR5 is to blame. RV770 GPU chip is very power efficient in idle and manual downclocking of the VRAM will drop the consumption to sub-30W figures. HD4850 idles around 25W at stock, without manual tampering...

**flippin_waffles** · 03-09-2009, 08:05 AM

Here's Josh's take on RV790.

http://www.pcper.com/article.php?aid...e=expert&pid=1

A Bit of History

The other day Fudzilla reported that the RV790 was far more than a faster clocked version of the current RV770 which powers the Radeon 4800 series. Initial reports were that the RV790 was to be a slightly optimized RV770 which would run around 150 to 200 MHz faster in core clock speed. Nothing terribly exciting to see here. Or so we were led to believe...

**spursindonesia** · 03-09-2009, 08:25 AM

AMD will simply look foolish if the new card requires 6+8 pin PEG connectors, considering nVidia's success making GTX 285 into a 6+6 pin PEG connectors compliant card. And unless GDDR5 gets worse as it gets ramped up, the added VRAM capacity shouldn't affect the TDP THAT bad. But commenting on an attention wh*re poster is just like feeding a troll, perhaps i shouldn't even write this post, huh.

**~~OBR~~** · 03-09-2009, 09:19 AM

Originally Posted by Pressure

What programme did you use to read the information?

nothing yet, but on card is paper stick with frequencies, another info about TDP and SPs is from PR slide, but i dont know if it is true! facts are frequencies + (PSU pins, cooler) ... nothing more ...

ps. i dont know waht is exactly inside (number of SPs)

**perkam** · 03-09-2009, 10:15 AM

This is the biggest piece I've seen on a product that no one knows anything about but it offers some great insight into the thought and design process of ATI's release relative to Nvidia.

http://www.pcper.com/article.php?aid...e=expert&pid=1

Perkam

**ownage** · 03-09-2009, 10:26 AM

Latest rumor from reliable source says nVidia wants to put a GTX275 against the HD4890. If true that also says something about RV790 performance.

Is that the card nVidia wants to launch the same day as ATI, OBR?

**Hornet331** · 03-09-2009, 10:32 AM

Originally Posted by largon

Hornet331,
The thing with RV770's idle consumption is, GDDR5 is to blame. RV770 GPU chip is very power efficient in idle and manual downclocking of the VRAM will drop the consumption to sub-30W figures. HD4850 idles around 25W at stock, without manual tampering...

that doesnt matter... hows jo avarage suposed to fix the short comings from ati.

Don't advertise a card with low idel consuption when its not true, and then even lie about "delivering" it later.

**Manicdan** · 03-09-2009, 10:35 AM

its definitely interesting how they predict what a card would be like if it was built a little larger on the 40nm node, just by doing some math. AMD/ATI did something great with the R700s, now keep it up for dx11 and opencl, and maybe my stock will go back up a little.

**ToTTenTranz** · 03-09-2009, 10:44 AM

What I honestly think is that if the new chip was just an overclocked RV770, they wouldn't give it a different codename.

AFAIK, ATI never did that with codenames.

**Shintai** · 03-09-2009, 11:14 AM

Originally Posted by ownage

Latest rumor from reliable source says nVidia wants to put a GTX275 against the HD4890. If true that also says something about RV790 performance.

Is that the card nVidia wants to launch the same day as ATI, OBR?

So a slightly higher clocked 260GTX?

**Shintai** · 03-09-2009, 11:16 AM

How many RV790 theads do we need for any new speculation?

We already have this speculation in two of the others:
http://www.xtremesystems.org/forums/...&postcount=199
http://www.xtremesystems.org/forums/...7&postcount=55

**SNiiPE_DoGG** · 03-09-2009, 11:31 AM

Originally Posted by Shintai

So a slightly higher clocked 260GTX?

nononono you got it all wrong, its a GTX 260-240 55nm with 1024mb vram..... oh wait....

**Vapor** · 03-09-2009, 11:32 AM

Originally Posted by ToTTenTranz

What I honestly think is that if the new chip was just an overclocked RV770, they wouldn't give it a different codename.

AFAIK, ATI never did that with codenames.

FWIW, R350 and R360 were only differentiated by clockspeeds (essentially).

IMO, this PCPer article is not much different than the Fudzilla artcile (or even an INQ article)...they're writing about something they don't know the facts of

The only differences are that they admit they don't know the facts and they try to explain their themselves thoroughly--end result is the same though

EDIT: merging this one with the other threads...

**SNiiPE_DoGG** · 03-09-2009, 11:33 AM

indeed this could fit nicely inside another thread, but it is an interesting read

**spursindonesia** · 03-09-2009, 11:36 AM

GTX 275, a down clocked GTX 285 ?

**Ruroni** · 03-09-2009, 11:40 AM

Thanks for posting this. Was a very good read. I can't wait to see what it is.

**waver_01** · 03-09-2009, 11:53 AM

http://www.fudzilla.com/index.php?op...12486&Itemid=1

Did we forget to mention that the RV790 chip is 40nm?

I hate ATI rumors, so chaotic

**v_rr** · 03-09-2009, 12:04 PM

ATI is spreading FUD around RV790 like they did with RV770. Simple.
Anyone knows nothing about the GPU for sure. Each source says something different.

**Barys** · 03-09-2009, 12:45 PM

GTX275 against Rv790? Let`s see - Rv790 is probably about 5-10% faster than Rv770 so it will be so close to GTX285 performance. If NVIDIA want to win this part of the game they have to do card with performance of GTX285 and with price at the Rv790 level. Then NVIDIA is releasing something like GTX275. OK - but what GTX275 is supposed to be? There is no possibility to push GT200@55nm with specs we haven`t seen yet. 240SP, 216SP, 192SP - all these specs are already here. Moreover a name "GTX275" is saying that we could expect something slower than GTX285. So WHAT NVIDIA could release against Rv790? The only way is launching a new chip (40nm?) IMO but unfortunately there is no info about any GT2xx in 40nm.

**ToTTenTranz** · 03-09-2009, 12:49 PM

Yap, FUD spreading.
No one knows what RV790 will be anymore, except that we'll have to wait another month to be sure about its specs.

**brinox** · 03-09-2009, 01:03 PM

since no one knows exactly what the details are, this is a breadbasket pretense for when the product is actually released. if its what the market wants (probably 40nm) then the stock price will hopefully shoot up.

**ap4lifetn** · 03-09-2009, 01:10 PM

maybe GTX275 is 240sp, but only 448bit like the ones on the GTX295, thats the only combination they didn't use yet

**SNiiPE_DoGG** · 03-09-2009, 01:15 PM

an SKU between the 260 and the 285 would just be a waste of time for NV if this card really does live up to spec of being 20% better than the 4870....

**Barys** · 03-09-2009, 01:19 PM

Yeah, i`ve missed it

That`s the only possibility we have not seen yet. But on the other hand could this combination give NVIDIA a victory over Rv790 if Rv790 will probably be 5-10% faster than current Rv770 and GTX275 (with these specs of "half of GTX295") is supposed to be slightly slower than even GTX280 (i suppose it because of a name GTX275 vs GTX280/285). As i said before - IMO if NVIDIA want to win this battle it should present a new GPU (in 40nm) - GT214, GT215 or whatever one.

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