|
|
Post by austin86 on Jul 15, 2024 12:54:54 GMT -5
I'm going to start testing my 440bx board AGP slot at a 1/1 divider to try and get around the limitations of the slot only supporting agp 2x If my math is right 1/1 at 100mzh wold be the same as 3x and 133mhz with 1/1 would be the same as agp 4x give or take, or does it not work that way???
Anyway I would love to hear from some of you and if you done any testing here ?
|
|
|
|
Post by Mr.Scott on Jul 15, 2024 14:05:04 GMT -5
Doesn't work that way. All that does is increase the PCI bus.
|
|
|
|
Post by austin86 on Jul 15, 2024 14:33:03 GMT -5
Doesn't work that way. All that does is increase the PCI bus. But wouldn't upping the clock speed of the AGP bus increase the total bandwidth the AGP bus and handle ? I thought that was why the 440bx platform out benched in video at 133fsb over al lthe other sk37-/slot1 chipset back in the day? |
|
|
|
Post by Mr.Scott on Jul 15, 2024 14:46:22 GMT -5
To an extent, but it won't make a 2x a 4x.
|
|
|
|
Post by Macsbeach98 on Jul 15, 2024 19:22:57 GMT -5
Generally upping the bus wont make that much difference can make a slight difference the AGP bus is parallel 2x lanes 4x lanes or 8x lanes.
Upping the bus speed will give you more bandwidth but not much and wont improve scores much.
AGP 2X doubles the bandwidth 4X quadruples the bandwidth you get the idea to have similar increases with bus increase your bus will have to be over 4 times the speed 266mhz base clock it isnt going to happen thats for 4x.
Another thing upping the bus sounds good but if the card can only do so much it wont help at all will just increase latencies
|
|
|
|
Post by austin86 on Jul 16, 2024 14:25:38 GMT -5
Thanks for the info. looks like I'll need to do some more digging and find a chipset with AGP 4x that I can use. But I am tempted to do some testing here and see how much of a benefit overclocking it does.
|
|
|
|
Post by Macsbeach98 on Jul 16, 2024 17:21:10 GMT -5
Actual testing is the best way to know but AGP4X is double the bandwidth of AGP2X you will need your AGP2X bus at double the clockrate to match AGP4X
AGP bus is 66Mhz you will need 133mhz to double the bandwidth.
Another problem is weather you have 100 or 133 bus the standard deviser will output 66Mhz to the AGP bus some boards give you the options of 66, 72, 83mhz AGP bus but doesnt usually make a lot of difference to the score.
|
|
|
|
Post by austin86 on Jul 17, 2024 8:48:10 GMT -5
Actual testing is the best way to know but AGP4X is double the bandwidth of AGP2X you will need your AGP2X bus at double the clockrate to match AGP4X AGP bus is 66Mhz you will need 133mhz to double the bandwidth. Another problem is weather you have 100 or 133 bus the standard deviser will output 66Mhz to the AGP bus some boards give you the options of 66, 72, 83mhz AGP bus but doesnt usually make a lot of difference to the score. My board only has 1/1 and 1/3 dividers and agp 1x and 2x. My thought was to run the system at 66fsb at 1/1 then 1/3 then run the same tests at 100fsb with both 1/1 and 1/3 and then again at 133fsb. I might pick up a via c3 CPU since they're unlocked and I could remove the CPU speed difference from the tests. The test I'll run are 3d mark 99, 00 and 01 and maybe 03, and a few games at 1600x1200.
I can run the same tests on my Athlon XP board to. But IDK if I can change the dividers on it, I not messed around with it much.
|
|
|
|
Post by eidairman1 on Jul 23, 2024 20:04:56 GMT -5
|
|
