ASRock Z87M OC Formula Review: mATX OC at $190
by Ian Cutress on August 14, 2013 10:00 AM EST- Posted in
- Motherboards
- ASRock
- Haswell
- Z87
System Benchmarks
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 speaker volume to 100%, and run the Rightmark default test suite at 192 kHz, 24-bit. The OS is tuned to 192 kHz/24-bit input and output, and the Line-In volume is adjusted until we have the best RMAA value in the mini-pretest. We look specifically at the Dynamic Range of the audio codec used on board, as well as the Total Harmonic Distortion + Noise.
USB Backup
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 WinRAR test. In an update to pre-Z87 testing, we also run MaxCPU to load up one of the threads during the test which improves general performance up to 15% by causing all the internal pathways to run at full speed.
The USB speeds of the ASRock motherboards, especially using XFast, are always impressive.
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.
Similarly to other Haswell motherboards, DPC Latency on the platform seems to be higher than that seen on Ivy Bridge, with 150-200 being the norm rather than the sub-100 we were kind of expecting.
Facebook
Twitter
RSS
25 Comments
View All Comments
Pessimism - Wednesday, August 14, 2013 - link
Who overclocks anymore? Better off to just save your money and buy the next CPU up IMO.Horza - Wednesday, August 14, 2013 - link
So if I buy a 4770k and overclock it to 4.5hgz (kind of the point with the K series) what's your advice?Overclocking is an easy way to get some free performance and can be a bit of fun at the same time.
Pessimism - Wednesday, August 14, 2013 - link
Since you're already at the top end for desktop parts, my advice would depend on what task you perform that saturated the 4770K at stock speeds.RealiBrad - Wednesday, August 14, 2013 - link
So if I'm a gamer, its better for me to buy an I7 over an I5, even though I can get an I5 and OC it past the base performance of any I7.Why?
Pessimism - Wednesday, August 14, 2013 - link
You will spend more on the rest of the computer to do it than if you had bought the i7 in the first place. You will also spend more on electricity to power your PC. Yes you will gain a little CPU capacity over a stock i7, I can't deny that. However you haven't provided any example of an everyday gaming or computing scenario that saturates an i7 and justifies all the extra expense, energy consumption and hassle. Don't get me wrong, I was clocking the snot out of a 2500 Barton back in the day like everyone else, I just think the cost/benefit ratio isn't there anymore when you look at how far hardware is past software right now.karasaj - Wednesday, August 14, 2013 - link
Starcraft II. I can bring my 4.6ghz 4670k to its knees in real world scenarios if I want too. That wasn't hard :Pkarasaj - Wednesday, August 14, 2013 - link
Real world scenarios being team games and intense 1v1's.owan - Wednesday, August 14, 2013 - link
"All the extra expense"... how much do you think it costs? With an unlocked multiplier on the CPU's, its quite easy to overclock and doesn't incur much added expense. Any halfway decent motherboard that has the features you want on it is going to be fully capable of overclocking quite a bit anyway. The electricity difference is going to still be there, but is probably fairly small.. Maybe 20-30W ? With TDP's on the Intel chips these days, it really doesn't take a big cooler to cool them, even if overclocked. A CM Hyper 212+ can be bought for something like $20 and does the job really well. Lots of people would be buying an HSF capable of handling the additional heat anyway. You could easily build a rig capable of overclocking for less than it would cost to jump to a high-end i7 and get equal or better performance.RealiBrad - Wednesday, August 14, 2013 - link
So if I'm building a new system, and the game I'm likely to play will have a cpu bottleneck with an i5-4670, its cheaper for me to spend more on upgrading to a locked i7-4770 for $90 more and get a few frames increase at best? Why would it not be better to take that same $90 and get a i5-4670k and a mobo that can adjust the multiplier? If an i5 is bottlenecked then getting any locked i7 will do nothing. Its far better to get an unlocked i5 and OC it to reduce the bottle neck. yes, the mobo will cost a little more, but the jump from an i5 to an i7 is still more expensive than getting a i5 k and mobo.IanCutress - Wednesday, August 14, 2013 - link
It depends what you do. If you overclock and get another 25% performance, that enables you to complete 5 tasks in the same time as 4. If the reward for doing that task is more than the cost of the electricity, then it's a no brainer. This is particularly relevant in the financial industries, where every millisecond counts, or for careers that are throughput limited.That's just for workloads - gamers are often not worried about the cost of electricity when it comes to pure performance, and overclocking to increase single core performance, particularly in games like Civilization V that respond well to overclocking (http://www.anandtech.com/show/6985/choosing-a-gami... result in a rise of FPS.
There is also the aspect of competitive overclockers, who see it as a challenge to out-overclock their competitors. As mentioned in the review, this is one of the target groups for OC-oriented motherboards, and the motherboard needs to have features to appeal to this crowd.
Just because you do not overclock anymore does not mean that the activity is dead/no longer useful. It is alive and kicking - the amount of pre-overclocked systems on sale today is just one prong of this.
Ian