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Higher FSB , Can't Overclock Video ?

R

RedLancerOz

Limp Gawd
Joined
Jan 16, 2007
Messages
431
Having A Werid Issue ...

My System

Gigabyte EG31M-S2
E2180 @ 3.2 8x400
2GB DDR2 800MHz Mushkin Memory
Asus GeForce 9600GT


When I Have my FSB lower than 400 , i can overclock my video card as much as i like ....... raise it to 400Mhz FSB an i cant even overclock 20Mhz on the core or memory

i had it set to 725Core/1050MHz Memory with 10x333 An it was fine ? is this normal

i also tried setting the PCI Express clock to 102mhz but no post , so its set to auto
 
The G31 chipset has a flaky PCIe lock, if you raise the FSB, the PCIe frequency will rise too. The 9600GT has a different clock generator (link quoting Unwinder), so you can't OC your 9600GT further when you are above 400 FSB because your video card is already OC-ed ! ;)

Be careful, because the SATA HDD's, integrated LAN, etc (PCIe based hardware) could go bad, causing data corruption or no internet and so on. :p

I'm interested in one thing, when you rise the FSB from 200 to 300 MHz with PCIe on Auto - the GPU speed will be at what speed from where ? :D
 
using 333FSB I was able to overclock the video card in rivatuner to 725 / 1050Mhz

now i see what your saying about the 9600gt , i honestly dont know what the real speeds were than :eek: but they must have been higher than what i was setting

so im wondering what my real clock is @ 400fsb ... , wish there was a way to find out
 
Hehe...reminds me of the good old days of oc'ing my celery. That was one the biggest problem when oc'ing them (pushing the pci). Many O' people (including myself) lost drives and cards would get all wacked out.
 
forrehmmnd said:
gpuz ?
Click to expand...

Since the clock itself is derived from one quarter of the PCI-E bus speed which is assumed to be 100MHz, you won't be able to detect the actual clock speed changes through any piece of software. The only way to tell the difference would be to run some benchmarks before and after and note the differences.
 
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