Ivy Bridge Overclocking: Ratio Changes Without Reboot, More Ratios and DDR3-2800
by Anand Lal Shimpi on September 13, 2011 6:43 PM EST- Posted in
- CPUs
- Intel
- Ivy Bridge
- IDF 2011
- Trade Shows
Ivy Bridge has three new features for overclocking:
- The max CPU ratio is now 63x up from 57x
- You can now adjust CPU ratios without a reboot, just via a register write.
- DDR3-2800 will be the maximum DRAM frequency.
More on Ivy Bridge later today!
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gramboh - Tuesday, September 13, 2011 - link
What does ratio mean in this context? The CPU Multiplier I assume (based on max support 57 > 63)? That is awesome, I assume that isn't possible with SB? I think Bulldozer can do it based on the videos before.kjboughton - Tuesday, September 13, 2011 - link
1). Yeah! More unachievable clocks are now available to the 99.9% of system builders that never OC this high anyway.2). C1E, EIST, Turbo....are these not dynamic overclocking by definition? Seems nothing new here. As well, most enthusiast board maker provide this functionality already via proprietary tuning tools that run atop Windows.
3). I can dig it. This is the maximum SUPPORTED speed, I assume. It's very conceivable that we will see unsupported speeds as high as DDR3-3600 or so. The bigger point here though is the added minimum step resolution of 200MHz (down from 266MHz). Me likely.
Spoelie - Wednesday, September 14, 2011 - link
LOL @ 3, comes right back around to point 1: why would you be enthousiastic about something that has no impact on performance whatsoever except for some insane overclocks? Sandy is satisfied with DDR1333-1600, who cares if Ivy supports 2800 - as long as its thirst for bandwidth is not massively increased. The only differentiator could be GPU performance.DanNeely - Sunday, September 18, 2011 - link
Surging bandwidth from 1600-2400ish would give enough extra headroom to allow hexcore CPUs to run on dual channel memory without bottlenecking. If the new IGP is fast enough to bottleneck on memory like llano's does much faster speeds would help there too.DanNeely - Sunday, September 18, 2011 - link
Having zero overlap in DDR3/4 bus speeds was always optimistic. IF DDR3 in that speed range becomes common soon enough they might bump the minimum DDR4 speed again; most likely overlap will happen.