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7800 and 7900 - difference ?

Discussion in 'Graphics Cards' started by Mr Spoon, 6 Jul 2006.

  1. Mr Spoon

    Hitman

    Joined: 22 Apr 2003

    Posts: 624

    Location: Button Moon

    is there any difference other than clock speeds ?
     
  2. MeatLoaf

    Capodecina

    Joined: 1 Dec 2005

    Posts: 14,271

    Location: Stoke on Trent

    4 extra pipes and an extra vertex shader i think.
     
  3. Semiskimmed

    Mobster

    Joined: 30 Jun 2006

    Posts: 4,768

    are on about both series GT's?
    the 7900gt is very similar to a 7800gtx if youre compring across both series
     
  4. Mr Spoon

    Hitman

    Joined: 22 Apr 2003

    Posts: 624

    Location: Button Moon

    was looking for technical differences not performance differences.
    thanks
     
  5. Aidoscuz

    Hitman

    Joined: 1 Jan 2005

    Posts: 516

    Location: Dublin, Ireland

    The 7900 series has less transistors and runs cooler as well as having higher clock speeds. They also don't work, if the amount of faulty 7900GTXs and GTs is anything to go by. If you're upgrading steer well clear of them and go for an ATI X1900 instead.
     
  6. Mr Spoon

    Hitman

    Joined: 22 Apr 2003

    Posts: 624

    Location: Button Moon

    ive just bought a 7950 GX2 :p think i need a new motherboard (current in sig).
     
  7. Jabbs

    Sgarrista

    Joined: 6 Feb 2004

    Posts: 7,726

    Location: Rugeley

    The main difference between the 2 is the 7800gtx works properly :D
     
  8. Semiskimmed

    Mobster

    Joined: 30 Jun 2006

    Posts: 4,768

    youre mobo should be fine, its sli enabled afterall. and fear not, the 7950 uses 2 7900go gpu's afaik so theres nowhere near as many going faulty.
     
  9. Aidoscuz

    Hitman

    Joined: 1 Jan 2005

    Posts: 516

    Location: Dublin, Ireland

    You should be alright with the 7950, I haven't seen any issues with them yet. It's the 7900 series that are broken I think. Also I don't think you need an SLi motherboard for the GX2, can anyone confirm this?
     
  10. senorstealth

    PermaBanned

    Joined: 16 May 2006

    Posts: 276

    Location: down the pub

    Though i thought the two cores were connected using some form of SLi, but i could be wrong
     
    Last edited: 6 Jul 2006
  11. pegasus1

    Soldato

    Joined: 27 Dec 2003

    Posts: 5,015

    Location: UK PLC

    Ha :D Ha :D Ha :D .
     
  12. senorstealth

    PermaBanned

    Joined: 16 May 2006

    Posts: 276

    Location: down the pub

    Second that mine runs nicely
     
  13. PinkFloyd

    Capodecina

    Joined: 21 Sep 2005

    Posts: 14,300

    Location: Bradley Stoke, Bristol

    It does connect via SLI. but I think they did something so it works in non SLI motherboards....

    Havent seen anyone confirm whether this will work in non-sli motherboards yet
    :\

    My 7900GT works lovely :)
     
  14. Mr Spoon

    Hitman

    Joined: 22 Apr 2003

    Posts: 624

    Location: Button Moon

    yea my motherboard is not on the list (boohoo), Ive just installed the latest BIOS, set the jumpers to normal/single mode instead of SLI and Windows wont boot ! :confused:

    before I installed the latest BIOS it worked but only on 1 card (GPU) which gave less performance than my 7800GTX SLI setup did.
     
  15. LoadsaMoney

    Caporegime

    Joined: 8 Jul 2003

    Posts: 29,849

    Location: In a house

    Yeah 7900's have got a built in kill switch, over time they die, could be seconds/hrs/minutes etc.... trouble is they don't say on the box how long the kill switch has been activated to last for, so you have to take a chance, and hopefully you' get one thats set to die after a week instead of a day or a couple of minutes.

    As well as all the other differances theres also 100. :p
     
  16. ihatelag

    Wise Guy

    Joined: 13 Apr 2006

    Posts: 1,140

    Sounds interesting, but I haven't seen anyone here (in OcUK) have any problems with 7900's dieing out??? Or did I miss something lol :eek:
     
  17. MeatLoaf

    Capodecina

    Joined: 1 Dec 2005

    Posts: 14,271

    Location: Stoke on Trent

    Theres loads of threads about in GFX card section.
     
  18. Aidoscuz

    Hitman

    Joined: 1 Jan 2005

    Posts: 516

    Location: Dublin, Ireland

    :eek: They're all over the place... Have a look about four threads below this one, I've just posted one. Here's a few:

    http://forums.overclockers.co.uk/showthread.php?t=17597010
    http://forums.overclockers.co.uk/showthread.php?t=17584610
    http://forums.overclockers.co.uk/showthread.php?t=17595423
    http://forums.overclockers.co.uk/showthread.php?t=17595364
    http://forums.overclockers.co.uk/showthread.php?t=17590862
    http://forums.overclockers.co.uk/showthread.php?t=17591915

    And there's more...
     
  19. LoadsaMoney

    Caporegime

    Joined: 8 Jul 2003

    Posts: 29,849

    Location: In a house

    Yup 7 series are borked, even Nvidia says so. :p
     
  20. pegasus1

    Soldato

    Joined: 27 Dec 2003

    Posts: 5,015

    Location: UK PLC

    Delete 7 Series
    Insert 7900 Series
    My Leadtek 7800gtx 256 is running sweet at 520/1.37 at 35C idle on O2
    If i ever grow the grissle to volt mod it, it will fly.