• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

sandy bridge with > 100 mhz bus?

M

mikedev10

Member
why does this seem to be advised as such a no-no? i'm at 103 right now - is this really a big deal?

"BCLK Base Clock - This is strictly a NO, anyone using base clock overclocking could/will cause damange to CPU/Mainboard."
 
I don't know how much damage it will cause, but my understanding is that it generally wasn't stable beyond 110 MHz if you could even get it that high.

Also, the ~3-8% gained from increasing the BCLK paled in comparison to being able to get over 4 GHz on air. If you want every last bit of performance out of your system you'll do it, but it's not going to give you as much. I haven't heard anything about it damaging your system though.
 
The base clock now provides the clock for more components in the CPU/chipset system. Some of those are never meant to operate at any clock except the standard one.
 
Soleron said:
The base clock now provides the clock for more components in the CPU/chipset system. Some of those are never meant to operate at any clock except the standard one.
Click to expand...

This. I once put a 1mhz overclock on my PCI bus and it introduced corruption into my hard drive data, you can probably get away with a slight overclock, but the majority of devices running off the bus clock in Sandy Bridge are not designed to be run at a different speed.
 
how does that happen? haven't people been overclocking to irregular bclks now for a long time as well? hasn't that caused all the same components to work at even stranger frequencies? i'm wondering technically where and why this can result in lost data/physical damage? i'm at 103 now and i am assuming it's perfectly fine 😛
 
mikedev10 said:
how does that happen? haven't people been overclocking to irregular bclks now for a long time as well? hasn't that caused all the same components to work at even stranger frequencies? i'm wondering technically where and why this can result in lost data/physical damage? i'm at 103 now and i am assuming it's perfectly fine 😛
Click to expand...

That's because pre-Sandy Bridge chipsets didn't have the clock generator integrated into the chipset. So when you upped the bclk on pre-SNB processors, it left things like SATA/DMI/PCI Express/USB alone.

Now because they integrated it, you aren't just overclocking the chip, you really are overclocking everything in your system. Even your hard drives. USB drives, video cards, maybe even your mouse and keyboard(I don't know if that's true but for the sake of understanding).

You can wait for the Z68 which is rumored to have the clock generator external again.
 
wasn't that also true before the crazy speeds of 150 200 etc though? i thought the same thing was going on in like 202 and such. like 2/3 bus is what your agp would run at, so instead of 66.666 it would be 67.333 etc. i don't recall hearing any scary things back then.
 
you're not remembering correctly.

The ability to lock PCI/AGP frequency was a big deal when overclocking the FSB.
 
Plimogz said:
you're not remembering correctly.

The ability to lock PCI/AGP frequency was a big deal when overclocking the FSB.
Click to expand...

the 440bx chipset had (undocumented) locks for the PCI at 100 mhz fsb but not for the agp, so agp ended up running overclocked. it didn't matter for most graphics cards, iirc.

had the chipset not had that pci lock, though, it wouldn't have been worth the data risk to overclock like that.
 
I max out at 107.4, but you have to keep in mind it overlcocks EVERYTHING tied to the bus. It's just not worth it unless you're after a CPUZ screenshot and your trying for a frequency higher than your multiplier will allow.
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top