Gigabyte H77N-WiFi Review – First Look at Ivy Bridge with mITX
by Ian Cutress on November 6, 2012 12:00 PM EST- Posted in
- Motherboards
- Gigabyte
- H77
- mITX
Rightmark Audio Analyzer 6.2.5
In part due to reader requests, we are pleased to include Rightmark Audio Analyzer results in our benchmark suite. The premise behind Rightmark:AA is to test the input and output of the audio system to determine noise levels, range, harmonic distortion, stereo crosstalk and so forth. Rightmark:AA should indicate how well the sound system is built and isolated from electrical interference (either internally or externally). For this test we connect the Line Out to the Line In using a short six inch 3.5mm to 3.5mm high-quality jack, turn the OS volume to 100%, and run the Rightmark default test suite at 48 kHz, 96 kHz and 192 kHz. The results are given both numerical ratings and word ratings from ‘Very Poor’ to ‘Excellent’. We grade this test by assigning each of the word ratings a value from 1-6, and the final result is the sum of these ratings, and the score should end up between 8 and 48.
The Gigabyte board is our first motherboard on our test bed to go through Rightmark, so while we do not have any comparative numbers yet, but we can draw conclusions. In our testing, the Windows 7 performance rises with bit-rate, whereas the Windows 8 driver gives constant performance throughout. The dynamic range of the Realtek ALC892 is rated at 110 dBA ideal, but losses due to design come through – in this case the Gigabyte tops out at 86.2 dBA at 48 kHz.
USB Speed
For this benchmark, we run CrystalDiskMark to determine the ideal sequential read and write speeds for the USB port using our 240 GB OCZ Vertex3 SSD with a SATA 6 Gbps to USB 3.0 converter. Then we transfer a set size of files from the SSD to the USB drive using DiskBench, which monitors the time taken to transfer. The files transferred are a 1.52 GB set of 2867 files across 320 folders – 95% of these files are small typical website files, and the rest (90% of the size) are the videos used in the Sorenson Squeeze test.
At some point in the future we will be adjusting our testing to Windows 8, which will be able to take advantage of the UASP protocol for USB 3.0 transfers. In our performance review of Windows 8 this manifested itself in an increase in sequential USB 3.0 read speed from 256.6 Mbps to 406.30 Mbps, which meant a 4% quicker USB copy test as writing was not similarly affected.
DPC Latency
Deferred Procedure Call latency is a way in which Windows handles interrupt servicing. In order to wait for a processor to acknowledge the request, the system will queue all interrupt requests by priority. Critical interrupts will be handled as soon as possible, whereas lesser priority requests, such as audio, will be further down the line. So if the audio device requires data, it will have to wait until the request is processed before the buffer is filled. If the device drivers of higher priority components in a system are poorly implemented, this can cause delays in request scheduling and process time, resulting in an empty audio buffer – this leads to characteristic audible pauses, pops and clicks. Having a bigger buffer and correctly implemented system drivers obviously helps in this regard. The DPC latency checker measures how much time is processing DPCs from driver invocation – the lower the value will result in better audio transfer at smaller buffer sizes. Results are measured in microseconds and taken as the peak latency while cycling through a series of short HD videos - under 500 microseconds usually gets the green light, but the lower the better.
The DPC Latency test is starting to become one where we have two different types of motherboard manufacturer. The top tier manufacturers offer better software with their products, often with monitoring tools as part of the package in order to monitor overclocks or fan speeds. These monitoring tools inject high priority requests in the system on a regular basis (every 1-3 seconds), delaying other requests such as those for audio, causing spikes in DPC Latency which could lead to distortion or other audio anomalies. Surprisingly manufacturers without these tools do not have these issues. These issues are sometimes fixed via a BIOS update, but even if one board gets updated and fixed, it for some reason does not propagate to future products or the back catalogue. So here we are with the Gigabyte H77N-WiFi, which gives a good sub-200 microsecond result, but unfortunately while EasyTune6 is enabled, this can spike to 32000 microseconds. Ouch.
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Senti - Tuesday, November 6, 2012 - link
Default is teh default and stripped is after manually turning off unused features like network boot and various additional controllers boot roms that are needed only if you intent to boot from those devices.GoodBytes - Tuesday, November 6, 2012 - link
Ah Thanks,To be clear, these values are still with a dedicated graphic card, right? cause I know those add time to the POST process.
IanCutress - Tuesday, November 6, 2012 - link
Yes, these post times are with a GPU installed.dishayu - Wednesday, November 7, 2012 - link
Hey Ian, you mention "four SATA 4 Gbps" ports for H77 chipset on the first page. I'm assuming that's a typo and Intel haven't actually implemented a non-standard 4Gbps port?Dug - Tuesday, November 6, 2012 - link
All of your complaints sound like you aren't a typical mITX user. You are comparing against ATX boards? Why?Of course you can't put giant heatsinks on this, and why would you when you are testing an i3-3225 and its designed to go in a case that's 7". You couldn't anyway with 99% if mITX cases out there.
Test stability and reliability, how well the wireless works, ethernet, USB, and SATA performance.
Why do we need to see a benchmark of an i3225 against and Asus P9X79 Pro with an i7-3960X? This is a motherboard review, not a cpu review.
And what is with the game benchmarks? What video card did you use? Don't tell me you used a video card that's 3 times longer than the motherboard.
Sorry but this doesn't seem like a review for the intended audience of mITX.
crimson117 - Tuesday, November 6, 2012 - link
After all the notes about the odd component positioning and theories about how it might complicate the installation, he doesn't even try installing it in a real mITX case...Armourcore9brker - Tuesday, November 6, 2012 - link
I agree with this.About the complaints about component placement. That's dictated by the Intel socket pinout. See here: http://www.intel.com/content/dam/www/public/us/en/...
Starting on page 94.
Essentially the entire pinout shows where components would be placed. There isn't the room like on ATX boards to route the traces to other parts and have it be all neat.
What Asus and EVGA had to do was to add more layers to the board to get the traces to not interfere with the PCIe signals. That in turn will increase cost.
IanCutress - Tuesday, November 6, 2012 - link
Then the option becomes to just do it, or do it right. Different motherboard manufacturers have different mandates when it comes to this, and it shows in the cost.Regarding benchmarks, I have these numbers in the database, and thus it is interesting to see the difference between the two. I'd rather have an excess of data points than a limited field of view. As for using a high end video card, the whole point of a motherboard review is to test the limits - make the motherboard be the limiting factor in all testing as much as possible. There are now plenty of cases that deal with long discrete GPUs so that is not an argument against using one, and when going around a large LAN event it is interesting to see a double digit percentage of mITX builds around a powerful GPU. Similarly these users are also using cases that can accommodate larger heatsinks.
"Sorry but this doesn't seem like a review for the intended audience of mITX." - I feel the market for mITX is larger than you think. This Gigabyte board was built at the request of a system integrator in Asia, who bought 10000+ units for a specific need. The result of spending the time and effort made Gigabyte release the product to the general market. What may have been the plan for that system integrator may not be the plan for users - particularly when it comes to that 4-pin CPU power placement.
EnzoFX - Tuesday, November 6, 2012 - link
I agree that mITX is flexible and can accommodate powerful gaming rigs. However I'd say that is the minority. My concern with my mITX builds is always a balance of feature set. Stability. mITX to me is taking the, as Anand calls it "device-ification" of computers into my own hands. They go in smaller cases, whose components won't be changed all that often, so stability and build quality is actually even more important to me. The other thing is heat, while this is characteristic of cases and component selection, I think it would help us greatly if we got these mITX boards tested in practical use cases as well.My personal annoyance is seeing 500W+ PSU's with mITX builds that don't go anywhere near even half that wattage.
The mITX reviewing can use a boost here. Usually I find myself looking for reviews of what do become widely recommended boards. Test the top contenders, I'm always hearing about that ASRock ITX board, that's the #1 recommended board I see recommended in forums. Gigabyte is a brand I rely on, so I welcome their reviews, so thanks.
Termie - Tuesday, November 6, 2012 - link
Ian - thanks for this review. I built up a system using AsRock's z77 ITX board, and was also puzzled by the socket placement, but ultimately not everything will be as neat as on a bigger board because there just isn't as much board edge space available. No matter what, at least one power cable will be stretched inelegantly across the board.A few comments:
(1) your OCCT load numbers with the 7970 appear to be incorrect - perhaps this was actually running on the internal HD4000, judging by the wattage.
(2) testing power consumption on a platinum PSU is a bit unrealistic, as there are no SFX platinum PSUs available, as far as I know, and while some ITX builds go into cases, like the Prodigy, that can hold an ATX PSU, the use of Platinum PSUs even in these builds is unlikely due to cost.