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AMD Readying Radeon HD 4790 Based on RV790

Discussion in 'News' started by btarunr, Jun 15, 2009.

  1. Paintface

    Paintface New Member

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    and having that said.... what price are we looking at.... and since its the exact same core , could we update the bios with a high voltage and maybe reach at least stock 4890 speeds?
     
  2. Nick89

    Nick89

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    this will be perfect for my friends build!

    Aw wait its not 40nm? :(
     
  3. tvdang7 New Member

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    ati is trying to beat nvidia's 8800 line up lol:laugh:
     
  4. LittleLizard

    LittleLizard

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    IS THAT NO ONE SEE THE POTENTIAL ON THESE CARD? If it has the same pcb as a 4890, uses the same chip and runs at 600 = You can oc the hell out of them to 850mhz without trouble and to 1000 with volt mod!.
     
  5. newtekie1

    newtekie1 Semi-Retired Folder

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    ATi will be replacing the HD4830, however it is still in productions, AFAIK.

    And the HD4850x2 was an official ATi SKU, them providing utter crap support is another discussion all together. I guess we should drop the HD4670 since it has pretty terrible support also, I mean it took them over 3 months after the HD4670's release to get a driver out for it...

    These are going to be binned RV790s, 800MHz might be possible, maybe 850MHz with lots of voltage, but you aren't going to see 1000MHz. Most don't even see 1000MHz on the good cores that actually make it into HD4890s.
     
    Crunching for Team TPU More than 25k PPD
  6. eidairaman1

    eidairaman1

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    so the 4790, is it proving to outperform the 4830 and perhaps the 4850?
     
  7. From_Nowhere New Member

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    Yes the 4790 is going to outperform the 4830, and the 4850 if the 4790 is overclocked slightly (if it needs it). The HD 4770 already outperforms the 4830 and offers near 4850 performance at stock clocks.

    Unfortunately I'm guessing the overclocking headroom on these slower RV790 chips is going to be limited, but I think 4870 level frequency/performance is possible.
     
  8. enaher

    enaher New Member

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    mmm... there must be a lot of 790 cores under Ati's bed or the de 5000 are really near:), well the card makes no sense to me but hey priced right might be a good thing.
     
  9. Pyeti New Member

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    i wonder if these would crossfire with a 4830?
     
  10. Scrizz

    Scrizz

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    lame, who wants to buy my 4850s
     
  11. swaaye

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    I think NV and ATI do this to keep mind share rolling by reminding you they exist every month or so with a "new" release. It has been like this since the X800/6800 eras. Getting worse and worse with each new generation though. They seem to be scared to death about being seen as "stale" or some such. They compete with each other with these goofy releases.

    Regardless of what their little PR guy figureheads spout out, it's obvious that neither company gives a shit about not confusing the marketplace.

    NVIDIA is way worse in the notebook market though. They really screw with your head with regards to what the model numbers mean there compared to desktop and they keep dumping out new models there too.
     
  12. tkpenalty New Member

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    I'm utterly confused by AMD's current lineup... they've realised how effective swamping the market is because a lot of the less knowlegeable consumers will be more likely to buy.
     
  13. Drac

    Drac

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    i was going to buy it because i thought it was new and it had 40 nm but now i see its 55nm and its a bad copy of 4890, bah
     
  14. jessicafae

    jessicafae New Member

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    I am guessing that the 47xx series was supposed to be the 40nm shrink of the 48xx series requiring lower power and generating less heat (like the 46xx is the shrink of the 38xx series). The 4770 is this. But according to the rumors/news TSMC is having issues with yields at 40nm. This might mean that AMD/ATI might start with 55nm parts for this SKU and then replace the 55nm part with the 40nm part later (like Nvidia has done in the past with many products shipping with either 65nm or 55nm chips - I have a GTS250 with a 65nm chip for example). It does make it confusing, but lets hope it is a 40nm shrink of the RV790.

    But according to the original chinese article
    http://publish.it168.com/2009/0611/20090611067001.shtml
    The 4790 is going to be 800 shaders, probably core clock of 625-650mhz, 256bit GDDR5 512MB memory and priced at 800-900 yuan ($117-$130). It is going to be priced just below the 4870 (1000yuan $150) and be just a bit slower. It should replace the 512MB 4870 (just like the 4770 is designed to replace the 4830 and 4850, and like the 46xx series replaced the 38xx series).

    This will be a great product (even if it is still using the 55nm RV790 chip). I hope we get official news on this soon, and I hope they can get enough out to customers.
     
  15. newtekie1

    newtekie1 Semi-Retired Folder

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    I believe you are correct, however I think ATi has done it in a far sloppier way than nVidia has. Causing confusion over Crossfire support, and performance based on the model numbers. They should have just left the current line-up the way it was, and waited for the 40nm supply to be sufficient enough to release these SKUs properly.

    And I guarantee you don't have a 65nm GTS250.
     
    Crunching for Team TPU More than 25k PPD
  16. jessicafae

    jessicafae New Member

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    I agree with you completely. They should just keep dropping the prices on the 48xx series rather than create these premature 47xx SKUs.

    I don't really want to clutter this 4790 thread, but according to GPU-Z I do have a 65nm GTS250. I have a Sparkle 512MB GTS250. I guess GPU-Z could be reporting incorrectly...

    [​IMG]
     
  17. newtekie1

    newtekie1 Semi-Retired Folder

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    It is, there are several threads on the issue floating around the forums. Here is just one.

    Software can not tell the difference between the 65nm and 55nm core, due to nVidia not changing the GPUID code when they made the new revision. So the only way to know for sure is to take the heatsink off and look for yourself.
     
    Crunching for Team TPU More than 25k PPD
  18. eidairaman1

    eidairaman1

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    look at die size, transistor count and if there are any SP count.
     
  19. tastegw

    tastegw

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    if this card costs less than $110, then it would be a nice deal.

    but its a shame its not 40nm.
     
  20. Flyordie

    Flyordie New Member

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    A girl who likes somewhat powerful hardware... hmmmmm rare sight indeed. :toast:
    In the meantime- You more than likely have the A2 version (I think thats the # for the 55nm one) anyway... Enjoy the card Jessica.
     
  21. SonDa5

    SonDa5

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    I agree. This is where this card needs to be to make it a winner.
     

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