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Really basic question about FSB...
- Thread starter UltraCow
- Start date
i dont really understand your question but, if your overclocking and youv maxed out your ram and cpu to the max FS=B, then no your not gonna be hit performance wse. the higher the FSB the better performance.
on the other hand, when you raise the FSB, your PCI and AGP frequencies go up to match the FSB. unless you have a mobo capable of locking the PCI/AGP freq's to a fixed 33/66mhz bus, then yes, your 3D performance will be greatly impacted. reason for this is, your AGP and PCI buses should never be run outta 33/66 mhz. if and when they are, you graphics card and other componants will be effected because they arent meant to run faster and rarely do run faster stable. you will definitly have problems with ATI radeon cards past 70mhz and same with nvidia cards. can also damage them if running the busses too fast. you will get glitches and artifacts and may burn your card out. also you may run the risk of corrupted data on your hard disks due to the over clocked PCI buses.
so if you cant lock your PCI/AGP, i recomend raising the multiplier and lowering the FSB to overclock. this will not give as much performance as a high FSB, but its the only way to overclock a CPU without PCI/AGP lock functions.
C
on the other hand, when you raise the FSB, your PCI and AGP frequencies go up to match the FSB. unless you have a mobo capable of locking the PCI/AGP freq's to a fixed 33/66mhz bus, then yes, your 3D performance will be greatly impacted. reason for this is, your AGP and PCI buses should never be run outta 33/66 mhz. if and when they are, you graphics card and other componants will be effected because they arent meant to run faster and rarely do run faster stable. you will definitly have problems with ATI radeon cards past 70mhz and same with nvidia cards. can also damage them if running the busses too fast. you will get glitches and artifacts and may burn your card out. also you may run the risk of corrupted data on your hard disks due to the over clocked PCI buses.
so if you cant lock your PCI/AGP, i recomend raising the multiplier and lowering the FSB to overclock. this will not give as much performance as a high FSB, but its the only way to overclock a CPU without PCI/AGP lock functions.
C
ZigZagZeppelin
2[H]4U
- Joined
- Nov 29, 2000
- Messages
- 2,307
Running agp & pci out of spec won't "BURN OUT" any cards, lol.
They may not be stable out of spec or may limit how much fsb u can apply.
They may not be stable out of spec or may limit how much fsb u can apply.
Woops, sorry if my question wasn't clear. Let me try again.
Lets say there are 2 systems, with the following specs:
Sys 1:
Athlon XP @ 1950MHz 170 x 11.5
9800 Pro
Sys 2:
Athlon XP @ 1950MHZ @ 200 x (whatever multi would achieve that clock speed)
9800 Pro
Now, what I'm asking is, would there be much of a difference in 3D performance between the two otherwise identical systems? Since both are CPU and memory bandwidth limited, would the increased mem bandwidth on the second help very much?
Lets say there are 2 systems, with the following specs:
Sys 1:
Athlon XP @ 1950MHz 170 x 11.5
9800 Pro
Sys 2:
Athlon XP @ 1950MHZ @ 200 x (whatever multi would achieve that clock speed)
9800 Pro
Now, what I'm asking is, would there be much of a difference in 3D performance between the two otherwise identical systems? Since both are CPU and memory bandwidth limited, would the increased mem bandwidth on the second help very much?
zer0signal667
2[H]4U
- Joined
- Jan 11, 2002
- Messages
- 3,847
Originally posted by ZigZagZeppelin
Running agp & pci out of spec won't "BURN OUT" any cards, lol.
They may not be stable out of spec or may limit how much fsb u can apply.
Increased speed results in increased heat output, so it could actually "burn out" a card or do some damage.
yes, it COULD burn your card out. trust me ilearned from DOING it.
i pumped my FSB up on a KT333 board and my AGP clock was at 81mhz. my Gforce 2 was destroyed. that was lon ago and since then i learned that a raised AGP bus will definitly eventually roast your card. so yes my good man, the high AGP bus CAN and WILL in fact burn your card out. and no, the AGP/PCI busses being too high will not limit an FSB OC. yu can raise the FSB as high as the RAM and CPU will support. your just going to burn up your PCI and AGP devices and corrupt data on your HDD's
but you can go as far as your CPU and RAM allow you without a PCI/AGP lock.
iv done it lol
C
i pumped my FSB up on a KT333 board and my AGP clock was at 81mhz. my Gforce 2 was destroyed. that was lon ago and since then i learned that a raised AGP bus will definitly eventually roast your card. so yes my good man, the high AGP bus CAN and WILL in fact burn your card out. and no, the AGP/PCI busses being too high will not limit an FSB OC. yu can raise the FSB as high as the RAM and CPU will support. your just going to burn up your PCI and AGP devices and corrupt data on your HDD's
but you can go as far as your CPU and RAM allow you without a PCI/AGP lock.
iv done it lol
C
LOL i bvurned out 2 GeForce 4600 cards and a 9700Pro beforeso dont tell me that FSB cant screw up your card. Its a bad sign when you are seeing distorted images in your BIPS screen, thats a bad sign. First time i blew up a 4600 card is on a old Epox board i ran a 3dmark atr 208FSB, no keep in mind the board never reset the AGP?PCI after 166FSB so that was way out of spec