agp*8 in agp*4 board

  dirtyh 10:40 19 Apr 2003
Locked

hello im thinking of buying a ati 9700 pro which is agp*8,my motherboard is only agp *4,are they compatable will it work in this motherboard which is a msi pro2ru with via kt266 chipset.
or will the motherboard need replacing which i will be doing but not yet

ps anyone know if there is a great difference between the above and a g/force 3ti500,which is a great card but a little jerky on high resolution.

any comments welcome
thx harry

  Inverjazz 10:51 19 Apr 2003

The latest Asus mother boards with AGP8 won't allow the installation of lower AGP cards. If you try it a warning led comes on and the system won't power up. So I guess that AGP4 cards are, generally speaking, not compatible with AGP8 slots.

  DieSse 11:01 19 Apr 2003

Yes, yur AGP8 card will work in an AGP4 mptherboard (but only at AGP4, of course). I've just fitted an AGP8 card as an upgrade, works fine.

  Inverjazz 11:01 19 Apr 2003

Sorry, you problem is the other way round, but I still think you would have problems on account of the different voltages involved. AGP4 cards are 3V whereas AGP8s are designed for 1.5V.

  barrie_g 11:16 19 Apr 2003

the newer (last 18 month or so) cards run at 1.5v

  Mr-C 13:11 19 Apr 2003

I have had the chance to try a radeon 9700 pro in to my old pc which was only 4X and fitted with a geforce4 ti4200.The card worked fine and totally outperformed the 4200 card. However you will really need a 350W power supply and of course a seperate power connection to the radeon card.

  DieSse 15:31 19 Apr 2003

By email

"was the agp *8 card 3volt or 1.5"

AGP 8x specification is 1.5V - not 3V. ref click here - see table on page 13 for compatability statement. Though cards MAY be designed to be able to use 3V, for compatability - see table on page 14 - it is not a requirement.

AGP4x in modern motherboards is 1.5V - some earlier motherboards use 1.5V or 3V for AGP2x and AGP4x use - though the specification for the graphics card calls for the card to be slotted differently to distinguish between the two types.

  DieSse 15:33 19 Apr 2003

PS - should have said, the motherboard where I upgraded the graphics card was a 1.5V AGP slot. Both AGP4x and 8x MUST support 1.5V slots.

  dirtyh 22:19 20 Apr 2003

thanks all my mobo is 1.5 volt as the radeon
but apparently 4xagp is little different than 8x.

so thanks again

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