[FUD] RV740 Packs 826 milllion transistors

[SNiiPE_DoGG]

When you go to a next generation manufacturing process, something that ATI just did with 40nm transition, you have to be aware that you can put a lot more transistors on the same space, compared to an old eg. 55nm process.

RV740 a 40nm chip that will fit the Radeon HD 4770 card and it has 826 million transistors. Radeon HD4870 has 956 million, while Radeon HD 4890 has 959 million transistors and it is quite clear that with 826 million transistors, you have enough space to pack a lot of performance.

The previous generation in the same segment is powered by RV730 XT 55nm chip which has 514 million transistors. If you compare the transistor count of RV740 and RV730XT you can see that the new chip has almost 60 percent more transistors and this resulted in a doubling of the stream processor count from 320 to 640 in RV740 40nm.

ATI pulled a nice trick keeping the 128-bit memory interface, but got twice the bandwidth by using GDDR5 memory.

http://www.fudzilla.com/index.php?op...13095&Itemid=1

This is good news for those wanting power efficient budget wary systems. It pretty much kicks the crap out of nvidia's mid range with no new progress in 40nm from nvidia...

[skugpezz]

http://www.fudzilla.com/index.php?op...13095&Itemid=1

This is good news for those wanting power efficient budget wary systems. It pretty much kicks the crap out of nvidia's mid range with no new progress in 40nm from nvidia...

so this card should be between the 4850 and 4870 or the 4850 and the 4830

[SNiiPE_DoGG]

so this card should be between the 4850 and 4870 or the 4850 and the 4830

performance at stock is just south of the 4850... no word on overclocking ability, yet.

[zanzabar]

they will have one with gddr3 between the 4830 and 4850 and one with gddr5 from the 4850-4890. or atleast thats what i think

[drizzt5]

no, this card is just gddr5 for now and its just below the 4850. But if its overclockability comes into play it might be better to get this.

[SNiiPE_DoGG]

no, this card is just gddr5 for now and its just below the 4850. But if its overclockability comes into play it might be better to get this.

well if it as close to the 4850 as I have seen then its a much better option because it consumes much less power.

[Lardman]

well if it as close to the 4850 as I have seen then its a much better option because it consumes much less power.

It's also going to be much cheaper - many are looking at this as a a very cheap, versatile pocket rocket.

[werty316]

Performance per watt should be quite good with this card.

[drizzt5]

well if it as close to the 4850 as I have seen then its a much better option because it consumes much less power.

A lot of gamers, including me, don't care a whole lot about consuming power.

But I do care about how much heat it puts off. Which I assume is going to be less.

In any case if I was in the market I would go for it over the 4850 just cause of the temps/money saving

[SLATYE]

GDDR5 seems like a wonderful thing for AMD. It's allowed them to keep the GPUs and PCBs relatively cheap, but still get as much bandwidth as they require. Presumably Nvidia will start uisng it on the next generation of cards.

I'm not sure why they continue to call it "GDDR5". It doubles the bandwidth (compared to GDDR4) by doing four transfers per clock cycle. Therefore it's not Double Data Rate (DDR) - it's Quad Data Rate (QDR). It should really be called GQDR RAM!

[SNiiPE_DoGG]

GDDR5 seems like a wonderful thing for AMD. It's allowed them to keep the GPUs and PCBs relatively cheap, but still get as much bandwidth as they require. Presumably Nvidia will start uisng it on the next generation of cards.

I'm not sure why they continue to call it "GDDR5". It doubles the bandwidth (compared to GDDR4) by doing four transfers per clock cycle. Therefore it's not Double Data Rate (DDR) - it's Quad Data Rate (QDR). It should really be called GQDR RAM!

fact. it makes no sense to call it DDR lol.

[largon]

A lot of gamers, including me, don't care a whole lot about consuming power.

But I do care about how much heat it puts off. Which I assume is going to be less.

Power consumption = heat output.
Basically, every single watt a silicon chip draws comes out as heat.

I'm not sure why they continue to call it "GDDR5". It doubles the bandwidth (compared to GDDR4) by doing four transfers per clock cycle. Therefore it's not Double Data Rate (DDR) - it's Quad Data Rate (QDR). It should really be called GQDR RAM!

GDDR5 is DDR.
In a, say, 900MHz (DDR-1800) GDDR3/4 chip addressing and command bus and the double-data-rate data I/O link all run at the same 900MHz. Effectively transferring data at 1800MHz due to DDR, eventhough physical frequency is just 900MHz.

On 900MHz (DDR-3600) GDDR5 on the other hand, the double-data-rate data I/O links run at double the frequency of the addressing and command bus, ie. the rest of the chip. Meaning the data links actually physically run at 1800MHz and as such are equivalent of 3600MHz due to DDR.

GDDR5 is DDR.
Some parts of it just run at sky-high frequencies.
And soon ennough, when something called "differential GDDR5" comes in later this year or the next, those frequencies will be doubled. Say hello to bandwidths on 128bit buses equal to 512bits worth of GDDR3/4 and 256bit'ers will reach throughputs equal to a whopping kilobit worth of GDDR3/4...

[Warrior_oF_Byte]

so... it will be 4830 < 4770 < 4850 < 4870 < 4890?
Price? 100u$s?

[largon]

I think HD4830 will be EOL'ed once HD4770 comes around.

[SNiiPE_DoGG]

I think HD4830 will be EOL'ed once HD4770 comes around.

ditto, its a card meant to sell extra 770 cores that werent up to snuff, I assume the 770 is also done with production for the most part.