4800 Serija

[Majo]

Sto vise to bolje...
Zakaj faking ne naprave GTX 250 sa nekakvih 160SP-ovima,vecim taktovima i cijenom oko 1400kn,to bi se prodavalo ko ludo,al oni samo stancaju high end pa kaj ce ova GTX 290 imat 300SP-a i gddr5 memu?
Ceka nas zanimljiva zima,odo ja sparat za novu grafu

[segregator]

http://www.hexus.net/content/item.php?item=16300&page=1

[thedream]

[D-I-A-B-L-O]

Malo mi je teško u to vjerovati,to uopće nisu niti blizu da budu konkurenti, da je u igri 4850 u cf-u još i nekako, ali ovo...
Neznam, ali ako je istina to je dobra vijest svakako

[thedream]

4870x2 je u pola igara sporija od GTX280.

[segregator]

Autor thedream

4870x2 je u pola igara sporija od GTX280.

Al je zato 4830 u CF u pola igara brža od GTX280

[pinkskin]

Autor thedream

4870x2 je u pola igara sporija od GTX280.

To su driveri krivi ili igre koje nvidia sponzorira bi trebale bolje radit na nvidii

[segregator]

Autor pinkskin

To su driveri krivi ili igre koje nvidia sponzorira bi trebale bolje radit na nvidii

...dok recimo dobro optimizirane igre kao COD4 rasturaju:

http://www.hexus.net/content/item.php?item=16300&page=6

[D-I-A-B-L-O]

Pffhhahahaha
naravno,po tome ispada da je 4830 u cf-u jača od4870x2

[McG]

When RV770 launched in the summer we took for granted that it was a great part, it upset nVidia’s pricing structure and gave us value at $200 and $300. We went through the architecture of the Radeon HD 4800 series and looked at performance, but I spent only a page or so talking about AMD’s small-die strategy that ultimately resulted in the RV770 GPU. AMD had spent much of the past 8 years building bigger and bigger GPUs yet with the RV770 AMD reversed the trend, and I didn’t even catch it. I casually mentioned it, talked about how it was a different approach than the one nVidia took, but I didn’t dig deeper.

It all started back in 2001 when ATi, independent at the time, was working on the R300 GPU (Radeon 9700 Pro). If you were following the industry at all back then, you’d never forget the R300. nVidia was steadily gaining steam and nothing ATi could do was enough to dethrone the king. The original Radeon was a nice attempt but poor drivers and no real performance advantage kept nVidia customers loyal. If ATi could produce the fastest GPU, it would get the brand recognition and loyalty necessary to not only sell those high end GPUs but also lower end models at cheaper price points. The GPU would hit the high end first, but within the next 6 - 12 months we’d see derivatives for lower market segments. One important takeaway is that at this point, the high end of the market was $399 - keep that in mind. R300 was going to be built on the same process, but with 110M transistors - nearly twice that of the 8500 without a die shrink. Its competition, the GeForce4 was still only a 63M transistor chip and even nVidia didn’t dare to build something so big on the 150nm node, the GF4 successor would wait for 130nm. We all know how the story unfolded from here. The R300 was eventually branded the ATi Radeon 9700 Pro and mopped the floor with the GeForce4.

What made R300 successful was ATi re-evaluating the way it made GPUs and deciding on something that made sense. At the time, it made sense for ATi to work towards building the biggest chip possible, win at the high end and translate that into better, more competitive products at all other price points. It is worth mentioning that part of R300’s continued success was due to the fact that nVidia slipped up royally with the GeForce FX, it was the perfect storm and ATi capitalized. ATi built the biggest chip and nVidia had no real answer for some time to come. ATi didn’t want to build a GPU that would rely on excessive repair and harvesting to keep yields high. And then came the killer argument: building such a GPU was no longer in the best interests of its customers. ATi’s RV770 design took three years of work, that means ATi started in 2005. It takes about a year for manufacturability from tapeout to final product ship, another 1 - 1.5 years for design and another year for architecture. The team that I met with in Santa Clara was talking about designs that would be out in 2012, we’re talking 4 TFLOPS of performance here, 4x the speed of RV770.

It was time to refocus. Instead of tailoring to the needs of the high end, ATi wanted to make a product that would be the best in the $200 - $300 range. To do so would mean that it would have to reverse the strategy that made it successful to begin with, and hope that somehow nVidia wouldn’t follow suit. In the Spring of 2005 ATi had R480 on the market (Radeon X850 series), a 130nm chip that was a mild improvement over R420 another 130nm chip (Radeon X800 series). ATi was still trying to work through execution on the R520, which was the Radeon X1800, but as you may remember that part was delayed. ATi was having a problem with the chip at the time, with a particular piece of IP. The R520 delay ended up causing a ripple that affected everything in the pipeline, including the R600 which itself was delayed for other reasons as well. Not only was G80 good, but R600 was late, very late. Still impacted by the R520 delay, R600 had a serious problem with its AA resolve hardware that took a while to work through and ended up being a part that wasn’t very competitive. ATi had lost the halo, ATI’s biggest chip ever couldn’t compete with nVidia’s big chip and for the next year ATI’s revenues and marketshare would suffer.

With its only competitor hell bent on making bigger and bigger GPUs, ATi took care of half of the problem - it would be free to do whatever it’d like, without any real competition. The question then became - could it work? But you have to understand that this was 2005 and the first specifications of RV770 were being drafted. Imagine sitting at a table full of people whose jobs were supported by building the biggest GPUs in the world and suggesting that perhaps we sit this round out. In the Spring of 2005, ATi decided to shoot for the Performance segment, and not Enthusiast. The entire RV770 design took around three years, which means that while we were beating ATi up over the failure that was R600, those very engineers had to go into work and be positive about RV770. The R600 GPU had an incredibly wide 512-bit memory interface, the problem with such a large interface is that it artificially makes your die bigger as you’ve got to route those interface pads to the memory devices on the board. For RV770 to have the die size ATi wanted, it needed to have a 256-bit memory interface, but using (at the time) current memory technology that wouldn’t give the GPU enough memory bandwidth to hit the performance targets ATi wanted.

Again, put yourself in ATi’s shoes, the time was 2005 and ATi had just decided to completely throw away the past few years of how-to-win-the-GPU-race and on top of that, even if the strategy were to succeed it would depend on a memory technology that hadn't even been prototyped yet. The spec wasn’t finalized for GDDR5 at the time, there were no test devices, no interface design, nothing. Just an idea that at some point, there would be memory that could offer twice the bandwidth per pin of GDDR3, which would give ATi the bandwidth of a 512-bit bus, but with a physical 256-bit bus. It’s exactly what ATi needed, so it’s exactly what ATI decided to go with. ATi did much of the heavy lifting with the move to GDDR5, and it was risky because even if RV770 worked out perfectly but the memory wasn’t ready in time the GPU would get delayed. RV770 was married to GDDR5 memory, there was no other option, if in three years GDDR5 didn’t ship or had problems, then ATi would not only have no high end GPU, but it would have no performance GPU to sell into the market.

Initially, RV770 was targeted at 1.5x the performance of R600, which looking back would not have been enough. During the next 1.5 years that 1.5x turned into 2x R600 and finally settled at 2.5x the speed of R600, at a price in the $200 - $300 range. The Radeon HD 4850 was originally a 256MB card with a 500MHz core clock and 900MHz memory clock. The RV770 products were finished in May of 2008, production started by June. Even up until the day that the embargo lifted there were some within ATi who felt they had made a mistake with the smaller-die strategy, but they were going to find out how right the strategy was, even sooner than expected. Within 30 hours we had our first preview up and made it already clear that ATi was on to something. The GeForce 9800 GTX got an abrupt price drop to remain competitive and even then it wasn’t enough, the Radeon HD 4850 was the card to get at $199.

The next question is how will nVidia respond to ATi’s strategy? Jen Hsun runs a very tight ship over there and does not take kindly to losing, especially not like this. nVidia continues to have very strong engineering talent and over the next couple of years we’ll see how RV770 has impacted nVidia’s development. Much like the R300 days, the success of the RV770 was partially ensured by nVidia’s failure. Unlike NV30 however, GT200 wasn’t delayed nor was it terribly underperforming - it was simply overpriced. ATi got very lucky with RV770, nVidia was tied up making a huge chip and avoided two major risks: 55nm and GDDR5, both of which ATi capitalized on. If you ended up buying a Radeon HD 4800 or derivative, you already know why you’re thankful. If you ended up buying something green, you most likely paid a much lower price than you would have.

Izvor: AnandTech


Sve u svemu zanimljiva priča i pregled događaja koji su doveli do današnjih RV770 čipova i stanja na tržištu.

[LuxZg]

Aloha ljudi!

Evo jedan linkić za ljubitelje 48xx serije..
http://www.pcper.com/article.php?aid...e=expert&pid=3

Naravno, riječ je o Video Transcoderu koji će (nadajmo se sutra) biti dostupan svim korisnicima HD3xxx i HD4xxx serije grafičkih kartica (možda i starijim, nisam gledao) - potpuno besplatno.

Klik na link će vam pokazati da je cca 2x brži od nVidia Badaboom konvertera, a cca 6x brži od transkodiranja samo na procesoru

Isto tako omogućuje podosta ulaznih, ali i izlaznih formata (H.264, DivX, WMV i dr.)

Sad samo da izađe Catalyst 8.12 .. Rekli su 10.12., dakle sutra.. i nadam se da neće odugovlačiti. Ne zbog ovog, čekam ga da upogonim STALKER CS na Visti x64 SP2

[McG]

The stream processors of RV775 will be increased to 840, and TMU increased to 48. It can be concluded that RV775 will feature 168 Stream Processing Units, and every 14 of Stream Processing Units forms a SIMD, so there would be 12 SIMD in total. Every SIMD contains 70 stream processors, which sounds more logical. But how can this be done? It’s very likely that they have utilized the spare units of RV770, and reform the Stream Processing Units in some special way. AMD RV770 is designed based on repair structures technology. If you have a unit with 10 shader processors, actually build 11. In this way, the spare unit can work should there be a defect. During the time when RV770 is sold well, AMD has enough time to improve the rate of good product. But we have no idea about the decrease of transistors.



Basically, the increase of Stream Processors and TMUs would bring positive influence. The improvement of core clock is supposed to be great as well. The core clock of RV775XT goes up sharply from 750MHz (HD4870) to 900MHz, and the memory clock of GDDR5 gets up to 1400MHz(*4). The core clock of RV775Pro has also been upgraded to 725MHz, and memory clock updates to 1400MHz. RV775Pro might be using GDDR4. Apparently, RV775XT is designed to fight GeForce GTX285 and put nVidia into a difficult situation. Probably RV775XT will be branded as Radeon HD5870. Real products are expected to be available late January, just after the new version of GTX200 Series. AMD will launch RV775Pro in March 2009, while RV870 based on 40nm won’t be out before October 2009.

Izvor: Expreview

[stef]

Ovo sa rv870 izgleda vrlo logično s obzirom da NV također planira kraj 2009. za novu arhitekturu.

[shogo]

nitko nema ovu karticu??vidim ništa se ne komentira...

[Metamphetamine]

Autor McG

The stream processors of RV775 will be increased to 840

i na kraju ništa od RV775, nego samo kresanje cijena Atijevki ili kako je Fudo rekao "How Ati stole Christmas"

[miljac007]

Matična ASUS M3A78,Proc. AMD X2 6000+,Grafika ATI HD 4670-molil za pomoć.Naime prilikom igranja npr FarCry2,Medal of Honor i sl. događa mi se da mi komp jednostavno zašteka na neko vrijeme oko pola minute tj. grafika i zvuk pa opet radi normalno i to svakih par minuta se to dešava.Šta napraviti,fleshao sam bios,skinuo nove drivere,hotfikse,više neznam.

[DraŽ]

koliko ram-a imas?

[miljac007]

2 GB King Max FSB800

[DraŽ]

Autor miljac007

2 GB King Max FSB800

Probaj stavit sve na low pa onda igrat, ak se opet desi onda imas problem!
Kupi si ti jos 2GB kingmaxa za buducnost dok je cijena jos niska 150kn.

BTW: Meni je farcry 2 pojel sva 4GB ram-a na visti, al to je zato sto sam bio iskljucio virtual memory.

[miljac007]

Stari hvala ti,probao sam i to i opet mi se isto dešava.Isto tako sam igrao sa i bez virtual memorije i nema nikakve promjene.Prije mjesec dana sam imao daleko slabiju konfu pa sam igrao medal of honor bez problema. Najviše sumnjam u grafiku,ne vidim drugi problem.

[roxium]

Sto je po vasem misljenju bolje, kupit jednu 4870-ku ili jednu 4850, pa kasnije dodat jos jednu u crossfire?

[r!dEr]

Autor roxium

Sto je po vasem misljenju bolje, kupit jednu 4870-ku ili jednu 4850, pa kasnije dodat jos jednu u crossfire?

s obzirom na cijene cini mi se da je bolje ici na 2x4850... no za to racujaj + 300-400 kn za plocu

[miljac007]

Riješio sam problem blokiranja. Dodao sam dva hladnjaka,jedan na chipset matične i drugi na grfičku i sve ide na very high bez ikakvog zatajkivanja,pa čak i FarCRy 2 i to bez obzira na drivere grafičke.

[d^_^b]

Kako da provjerim da li imam HD 4870 ili HD 4850...

Zanima me to, jer sumnjam u "postenje" trgovca koji mi je uvalio ovaj comp....

[dUG1]

Autor d^_^b

Kako da provjerim da li imam HD 4870 ili HD 4850...

Zanima me to, jer sumnjam u "postenje" trgovca koji mi je uvalio ovaj comp....

http://www.techpowerup.com/gpuz/



EDIT: sad sam kod buraza skuzio da mu za HD4870 sam pise 4800 series, tak da gledaj po taktu jezgre i vrsti memorije (DDR3 kod 4850 i DDR5 kod 4870)

[D-I-A-B-L-O]

Nego bilo je nekakvo govora o tome da bi se 4830-ke dale softmodat u 4850-ke otključavanjem dodatnih shadera, jel itko igdje išta pokušao ili saznao?

[Valg]

Autor D-I-A-B-L-O

Nego bilo je nekakvo govora o tome da bi se 4830-ke dale softmodat u 4850-ke otključavanjem dodatnih shadera, jel itko igdje išta pokušao ili saznao?

Stvar ti je bila u tome da prve 4830HD grafe su imale manje shadera od predviđenog, i sa novim bios-om je taj problem riješen.

A dali se može otključati, ne vjerujem, jer mislim dasu laserom presjekli/odstranili shadere, tako da od toga ništa (šteta, moglo je ispasti da 4830 modaš u 4850, kao i 6800LE u 6800Ultra).

Jedino je dobro što su niži nazivno taktovi, i sam si modaš bios te dobiješ brzinu jezgre i memorije istu i/ili veću od 4850HD...

[LuxZg]

Ajd da vas malo razbudim

Unatoč podosta postova gdje ljudi NE uspijevaju, ima nekih koji na kraju ipak uspiju. Što to? Vrtiti Physx u kombinaciji ATi+nVidia.

http://forums.guru3d.com/showthread.php?t=285063

No da, nemamo svi para za HD4870 X2 i još onda GTX280 samo za Physx Ali stvar radi - u Windows 7 Beta1. Pa eto, čitajte malo kog zanima.. Ja sam baš priupitnuo u istom threadu za "malo" više detalja

[Uber Gosu]

Autor Valg

Stvar ti je bila u tome da prve 4830HD grafe su imale manje shadera od predviđenog, i sa novim bios-om je taj problem riješen.

A dali se može otključati, ne vjerujem, jer mislim dasu laserom presjekli/odstranili shadere, tako da od toga ništa (šteta, moglo je ispasti da 4830 modaš u 4850, kao i 6800LE u 6800Ultra).

Jedino je dobro što su niži nazivno taktovi, i sam si modaš bios te dobiješ brzinu jezgre i memorije istu i/ili veću od 4850HD...

Tocno tako, da ja dodam:

• Radeon 4850 = 160x5= 800 shader processors.
• Radeon 4830 = 160x4= 640 shader processors.

• Core/Shader clock frequency 575 MHz
• Memory clock frequency 1800 MHz (effective)

Znaci taj 1 cluster e laserom fizicki odrezan i nepostoji sansa da se ikako vrati. Sto se taktova same grafe tice mogu samo reci iz prve ruke i svog testiranja:
GPU 750MHz
RAM 1070Mhz => 2140 Effective

Fascinira me jos jedan detalj na doticnoj kartici a to je da na max OCu temp ne prelazi 61.5C (ni jezgra, ni shaderi) nego kad takne limit sa RAMima krenu artefakti dog GPU jednostavno ne zeli veci takt prihvatiti i vrati se na predhodni.

@EDIT
Evo i SS (taktovi: GPU 691, RAM 1000):

[Independent]

Jedno pitanje ako netko ima ovu od XFX-a 4850, gledao sam gainwardovu ali trenutno nije dostupna... Zanima me dali je tiha i dali se dobro hladi jer ipak kad dode ljeto da budem miran ne ko sa ovom trenutno

Evo link: http://www.adm.hr/product_info.php?products_id=6598

btw. uzimam pc krajem mjeseca pa polako slazem komponente