Results 1 to 10 of 10

Thread: AGP x2/x4/x8 compatability

  1. #1
    Registered User
    Join Date
    May 2007
    Posts
    3
    Thanks
    0
    Thanked
    0 times in 0 posts

    AGP x2/x4/x8 compatability

    Ive said Id sort out an old machine for a family member and I was thinking about finding an old graphics card to put in it. Please dont anyone advise me to buy a new motherboard, go quadcore, or insist I need SLI. All I want is to get a bit more life out of a tired machine.

    Its an HP and I had a quick look at the serial number on their website for the specifications. It says that it has an AGPx4 slot if I remember correctly, I did check quite a while ago. As AGPx4 cards seem to be incredibly hard to find, does that mean that I can put a x8 card in and just get half the bandwidth out of it or something along those lines, or are they incompatible technologies? Cheers for any help.

  2. #2
    One Great Ordeal!
    Join Date
    Feb 2005
    Posts
    1,764
    Thanks
    201
    Thanked
    56 times in 49 posts
    That should work in theory. In reality some AGP 8x cards won't work in a 4x slot due to using the extra voltage that the AGP 8x specification provides. For example a 6800LE works fine in my computer and yet won't work at all in my brothers computer or my mums computer which both have agp 4x. I'd have a look around for a cheap geforce 4 or a radeon 8500 to 9000 series card to be on the safe side
    Last edited by digit; 28-05-2007 at 12:28 AM.

  3. #3
    Registered User
    Join Date
    May 2007
    Posts
    3
    Thanks
    0
    Thanked
    0 times in 0 posts
    Yeah I just found this playtool.com/pages/agpcompat/agp.html#agp33vmotherboard (grr cant use url tags), the PC was definately due for a new standard... Im just a little concerned by the section about some motherboards, which only support x4, allowing you to use x8 cards at the wrong voltage and destroying them. Ill cancel that order for a 7800GS 512MB DDR3 AGP then

    Just one thought, do cards which are listed as x4/x8 mean that they are fully backwards compatible to x4?

  4. #4
    One Great Ordeal!
    Join Date
    Feb 2005
    Posts
    1,764
    Thanks
    201
    Thanked
    56 times in 49 posts
    Well it could well work, but I doubt it would. It doesnt list the 7800GS as working. However there is an agp 4x version of the 7800 vanilla lucking about, as a google indicated, but hell knows where you would get it. To be honest though unless the processor is up to much such a card would go to waste due to not having enough processor juice thrown at it as it were I hope someone else posts in case I have got it completly wrong

  5. #5
    Senior Member
    Join Date
    Nov 2006
    Posts
    581
    Thanks
    51
    Thanked
    29 times in 28 posts
    I was running a 6600 in an old 4x AGP board and it was fine, even handled most games reasonably so it might be worth looking out for one of those.

  6. #6
    HEXUS.social member Agent's Avatar
    Join Date
    Jul 2003
    Location
    Internet
    Posts
    19,158
    Thanks
    732
    Thanked
    1,604 times in 1,043 posts
    Quote Originally Posted by shrimps View Post
    Yeah I just found this playtool.com/pages/agpcompat/agp.html#agp33vmotherboard (grr cant use url tags), the PC was definately due for a new standard... Im just a little concerned by the section about some motherboards, which only support x4, allowing you to use x8 cards at the wrong voltage and destroying them. Ill cancel that order for a 7800GS 512MB DDR3 AGP then

    Just one thought, do cards which are listed as x4/x8 mean that they are fully backwards compatible to x4?
    The voltage thing was rare when it was top end technology. Very few cards / boards were effected by it. Some of the ones that were had BIOS level voltage selection IIRC.
    Dont get me wrong, the card could be fried if used in a board that didn't support the correct one, but its a problem that is commonly over exaggerated

    Your best bet is to take a look at the slot on the board and try and match it with one of the ones here and read this

    More to the point, this bit -

    There are three versions of the AGP physical interface, for 3.3 V and 1.5 V cards respectively. The 1.5 V version has a key further away from the external connector, while the 3.3 V version is the opposite. But some poorly designed older 3.3 V cards incorrectly have the 1.5 V key, which may result in burnt mainboard if installed in a AGP 4X/8X slot. The third physical interface is universal, allowing installation in both 1.5 V and 3.3 V motherboards




    Quote Originally Posted by digit View Post
    Well it could well work, but I doubt it would. It doesnt list the 7800GS as working. However there is an agp 4x version of the 7800 vanilla lucking about, as a google indicated, but hell knows where you would get it. To be honest though unless the processor is up to much such a card would go to waste due to not having enough processor juice thrown at it as it were I hope someone else posts in case I have got it completly wrong
    There is no 4x only AGP card of the 7800 series. Infact, the last series to have a 4x AGP port only was the 4x00 range off the top of my head. They were phased to 4x/8x, with the 5xxx (FX) range having 4x/8x AGP only.

    Provided the voltage wasn't an issue like said above - it would work fine. AGP is backwards compatible (although not forwards )

    You are totally right on the CPU front though. This card would be a total waste in a system that old, unless its a higher spec than normal (being a HP though, thats probably not true sadly )

    What do you currently have in it? You would be very surprised how powerful the 6xxx range were - they can be had on Ebay for cheap and would be much better suited to a machine of that age
    Quote Originally Posted by Saracen View Post
    And by trying to force me to like small pants, they've alienated me.

  7. #7
    Registered User
    Join Date
    May 2007
    Posts
    3
    Thanks
    0
    Thanked
    0 times in 0 posts
    Dont worry I wasnt being serious about sticking an expensive graphics card in this machine. There are an awful lot of 6000 series GeForces knocking about on ebay, by the sounds of it they should be alright. Just to ask again (apologies, I know its already been touched on), would a card which is listed as being x4/x8 mean its without a doubt compatible with both? Have a look at the following for example scan.co.uk/Products/ProductInfo.asp?WebProductID=283839 (2 posts to go before i can use url tags)

    Im sleeping easy about frying components now too...

    Thanks for the quick replies, really appreciate it.

  8. #8
    One Great Ordeal!
    Join Date
    Feb 2005
    Posts
    1,764
    Thanks
    201
    Thanked
    56 times in 49 posts
    Agent: http://www.barefeats.com/mutant3b.html Hmm, I was only going purely by that link, perhaps they mean a 4x/8x card which would make sense I guess!

    Shrimps: I would assume so, should work fine. Perhaps the voltage issue isnt a problem them going by what agent has been saying perhaps its just me having some older mobo's lying around at home that suffers from the voltage issue, could have a look to see about the voltages in bios actually so my brother can scrap his frankly rather awful geforce fx 5600
    Last edited by digit; 28-05-2007 at 01:57 AM.

  9. #9
    HEXUS.social member Agent's Avatar
    Join Date
    Jul 2003
    Location
    Internet
    Posts
    19,158
    Thanks
    732
    Thanked
    1,604 times in 1,043 posts
    Quote Originally Posted by shrimps View Post
    Dont worry I wasnt being serious about sticking an expensive graphics card in this machine. There are an awful lot of 6000 series GeForces knocking about on ebay, by the sounds of it they should be alright. Just to ask again (apologies, I know its already been touched on), would a card which is listed as being x4/x8 mean its without a doubt compatible with both? Have a look at the following for example scan.co.uk/Products/ProductInfo.asp?WebProductID=283839 (2 posts to go before i can use url tags)

    Im sleeping easy about frying components now too...

    Thanks for the quick replies, really appreciate it.
    Yes, The AGP standard specifically requires that backwards compatibility is part of a cards feature
    The only issue that ever happened was the voltage thing, covered above. While this was rare, it was always worth checking

    Quote Originally Posted by digit View Post
    Agent: http://www.barefeats.com/mutant3b.html Hmm, I was only going purely by that link, perhaps they mean a 4x/8x card which would make sense I guess!
    Which bit are you reading exactly?
    For a start, that's going on about mac's, which are not directly comparable to PC's. Although its not too bad these days, Apple have a habit of locking hardware down to what they want to allow you to use.
    Quote Originally Posted by Saracen View Post
    And by trying to force me to like small pants, they've alienated me.

  10. #10
    Senior Member Mithrandir's Avatar
    Join Date
    Sep 2005
    Posts
    2,746
    Thanks
    461
    Thanked
    370 times in 188 posts
    • Mithrandir's system
      • Motherboard:
      • Biostar TP45-HP
      • CPU:
      • C2D e4600 (w/ Xigmatek Red Scorpion)
      • Memory:
      • OCZ ReaperX (2x2gb)
      • Storage:
      • Samsung F1 500gb
      • Graphics card(s):
      • xfx 9600gt Alphadog edition
      • PSU:
      • Xigmatek NRP-MC651
      • Case:
      • Coolermaster Cavalier 3 silver (windowed)
      • Monitor(s):
      • Fujitsu Siemens SCALEOVIEW D22W-1
    You should have a look at ebay. Something like Geforce 3 Ti series, possibly along the lines of 4200 as well.

    My mobo can only support up to AGP 4x only (not in my sig but my older system with Gigabyte 71XE and Athloon 900mhz )
    Cavalier-X: Biostar TP45-HP ¦ E4600@3.1ghz - Xigmatek Red Scorpion (OCZ Freeze) ¦ OCZ ReaperX 2x2gb (792mhz @ 4-4-4--12) ¦ Xigmatek NRP-MC651 ¦
    Palit 8800gt ¦ X-fi Fatal1ty Gamer ¦ Coolermaster Cavalier 3 (Silver/Windowed) ¦

    Poseidon Magma: MSI P45 Zilent ¦ E6300@3.0ghz - Coolermaster Hyper 212 (MX-2) ¦ Corsair 2x2gb (880mhz @ 5-5-5-15) ¦ Corsair HX450w ¦
    xfx 9600gt Alphadog edition (780/1950/1000) ¦ X-fi Gamer ¦ Gigabyte Poseiden ¦

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Real problems with XFX GeForce 6600GT AGP
    By Mutley in forum Graphics Cards
    Replies: 17
    Last Post: 06-05-2007, 01:15 AM
  2. AGP and AGP Pro?
    By Sirrush in forum PC Hardware and Components
    Replies: 10
    Last Post: 26-04-2007, 08:19 PM
  3. Graphics card advice for 4x AGP motherboard
    By pussycat in forum SCAN.care@HEXUS
    Replies: 20
    Last Post: 09-03-2006, 05:23 PM
  4. ATI Radeon X1800 AGP
    By Octavean in forum Graphics Cards
    Replies: 5
    Last Post: 15-11-2005, 03:31 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •