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I stumbled across Intel's extreme tuning utility and found I can tweek settings that the BIOS won't let me tweek. my BIOS is very limiting so I thought maybe I'd get something for nothing.

TL;DR -- nope. I got nothing for nothing Smile

the longer version:

The coolest part is I can mess with settings that my BIOS won't let me.
The sad part is I'm not sure it makes any difference in performance.
The OK part is my performance is pretty good, but I was hoping for a little boost for free.

After a few tweaks a several light bench marks (novabench ) a lot of "made no difference", several that crashed the system but the "watchdog recovered bios reset to factory" saved things. Overall I've given up for now.

What I tried.

dropping memory timings

Default:
11-11-11-28-1T 1600Mhz

9-9-9-24-1T 1600Mhz |-- Meh, no difference.
8-x-x-24-1T | 1600Mhz |-- unstable at any combinations of the secondary timings with CAS 8

increased the multipler to 14x, but kept timings at CL11
11-11-11-28-1T | 1866Mhz |-- YEAH, a little faster

Novabench was faster across the board. faster memory bandwidth, faster FPS, faster CPU, even faster disk access.

increased the multipler to 16x, but kept timings at CL11
11-11-11-28-1T | 2133Mhz |-- Wow, a little faster still. Oops, crashed bringing up CPUz

Back to 1866, CL 11, played a few mins of assassin's creed 4 and it even felt a little smoother.

Went to bed, put the system to sleep.

Next day, woke the system from a keyboard press. 4 beeps, power cycle, 4 beeps power cycle, 4 beeps, ( BOOOOO ). had to hard power down the system.

The power up watchdog reset the bios and it was back to where it was before I started.

Net-Net, it was fun but I'm not sure I can get much out of this since I really can't change what I want to change or I don't know what to change. I cannot boost the memory voltage directly which might make it more stable.

1866 felt snappier than 1600 but maybe I was just me wanting it to feel snappier. I can mess with voltage offsets (like system agent voltage offset) but I'm not sure this will help and I'm not sure what else it might do. I can change the timings for 1866, but this seems like its the game of faster transfer, but longer wait times between transfers.

Another setting I didn't change was the reference clock. Not sure I want to go there. with a i7 4770 I can't change any multipliers so I think I have what I have.

anyway, its a cool utility.

Also, I tried the utility it on my work system, ivy bridge 3770, but I had almost nothing I could change.

Anyway I hadn't seen this before so I thought I'd share it even though for my hardware it hasn't resulted in much.
Cool. You're basically describing memory overclocking, which you can probably find some good guides for. That's interesting that this utility gives you options that aren't available in your BIOS.

You just reminded me, I tried bumping my 1833 kit up to 2133 when I first built it. I should try turning that back to see if Ace Combat will stop crashing...
Yes, memory overclocking is what I was hoping for, even though this BIOS doesn't enable it. Downside is it seems this system does allow memory over-volting it is 1.5v.

This setting is adjustable: System Agent Voltage Offset: Sets the voltage for the processor's System Agent which includes the memory controller. This voltage is motherboard specific. but I'm not sure that alone with help.

I found a post on overclocker's dot ru forum with the same memory I have, but on an ivy bridge system. Hyundai 4096 MBytes PC3-12800 (800 MHz) HMT451U6MFR8C-PB two strips no problem working in the mode DDR3-2400 (11-13-12-34 CR1) at 1,610 volts

I'll experiment some more and see if I can squeeze a little more speed out of this.
1600 / 9-9-9-21-1T + 200 millivolts System Agent Voltage Offset seems stable and feels snappier. benchmarks show promise.

reboots and suspend/sleep/wake seem to work without crashing.

starting a prime95 run...
prime95 ran clean overnight. I now I'm supposed to run it longer but, you know...

I reduced System Agent Voltage Offset to 100 milliVolts and re-started prime 95.
Overnight (6-12hours?) is not enough for reliability testing in my experience. I've seen crashes, BSODs and errors pop up after 24, 48 and even 72 hours of testing a PC's reliability.

In my experience, most problems pop up within the first 24 hours of testing, so that's what I usually recommend.
Thanks Matthieu. I had some real work I had to get done this morning that I couldn't do on my laptop so I had to stop the test.

I restarted prime95 after reducing the System Agent Voltage Offset to +100 mV based on some additional reading of what it does and affects.

I'll try and let this run longer.
prime95 ran well so I decided it was time for a little more tinkering after a little more reading on the tertiary timings and some tips on correctly setting the secondary timings.

Below is with +200 mV System Agent Voltage Offset. just kicked off another run of Prime95

recall, factory setting was 11-11-11-28 @ 1600 Mhz

[Image: attachment.php?aid=177]
Nice work. Especially with the CAS Latency.
How does it play out in Benchmarks? Specifically gaming. Have you ran some before/after in Furmark, 3D Mark, etc?
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