cant raise FSB
cant raise FSB
I tried to over clock my Athlon 64 3200+ by slowly raising the FSB it all worked great untill i got to 215 then the pc wouldnt boot.So change of plan i tried to use the fairly idiot proof easy tune 5 that came with my pc same prob just froze and came up wit blue screen.Im pretty sure it not the temp coz it runs very cool to the touch.so i thought maybe power.What do you guys tink?got 300w psu!
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Not at all. On AMD systems the FSB is known as the HTT for some arb reason. So on a standard non-overclocked Athlon64 rig:wololo wrote:Bobendren how can it reduce fsb to 600 wen it only on 200??soz if this a dumb question!:)
HTT= 200MHz
LDT Multipler= 5
FSB= 1000MHz (200x5)
HyperTransport = 2000MT/s (1000x2, coz it's DDR Ram)
MT/s stands for Mega Transfers per second and doesn't really mean anything, so you can ignore that one.
By lowering the LDT multiplier (not to be confused with the CPU multiplier) you reduce the FSB and so create headroom for overclocking, because as previously stated exceeding an FSB of 1000 is badong i.e you can corrupt your installation of Windows.
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Use CBId (Central Brain Identifier). It will be under HTL Speed. It's like a more detailed version of CPU-Z.
CBId Download Page
Get Version 8.0.0.2 Build 0406.
CBId Download Page
Get Version 8.0.0.2 Build 0406.
Last edited by cYcLIc on 18 Apr 2006, 23:22, edited 2 times in total.
It's probably set to auto in which case your motherboard did it for you.ctrl-alt-del wrote:What I mean is the actual HTT 1000 or whatever its call.
Reason I ask is because my CPU is at 2500 250x10 and I cant remember setting LDT to 4x
As a matter of interest some ATI chipset based mobos can handle an FSB up to 1500MHz.
R580 chipset A8R32 can do it. I think the older R480 couldn't get near that. Which gives a OCd HTT bandwidth of 12GB/s ( instead of 8 ). Will be interesting to see them running DDR2-800 at 1:1 dividers on the AM2 socket. This should allow them to use the full bandwidth of the memory in dual channel (12.8 Gb/s).As a matter of interest some ATI chipset based mobos can handle an FSB up to 1500MHz.
@wololo: It's definately your LDT multiplier causing problems. Look for it in the BIOS. Its sometimes called an HTT multiplier, at least on ASUS mobos anyway. Rather use clockgen and increase in 1Mhz increments with Prime95 running in the background. You will see exactly when it starts to fail without crashing the PC. Also, set your RAM divider to something lower than 1:1.
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Intel Q9450 @ 3.2Ghz
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