Over the last few pages, we've seen that the Radeon HD 8790M is much quicker than the 7690M. Now, we can see that performance increase doesn't come with substantially higher power consumption; the 8790M draws only 2W more under load. Not only that, but it draws less power than the 7690M at idle. Thanks to AMD's ZeroCore Power feature, which is exclusive to 28-nm, GCN-powered parts, power utilization falls even lower when the display goes to sleep.
Note that these numbers show power draw for the whole system, including the Core i7-3770K, which has a 77W power envelope. Total power use on a notebook would probably be much lower.
We would have included noise and temperature numbers, but the MXM GPU modules AMD sent us have very different cooling solutions, neither of which you can expect to see in actual notebooks. Noise and temperature measurements for these samples would be pointless at best and misleading at worst.
You know the saying: better late than never.
I think that applies to the Radeon HD 8000M series. Mid-range and low-end gaming notebooks have been saddled with 40-nm GPUs based on AMD's old TeraScale architecture for almost a year. The 8000M series finally rights that wrong by bringing 28-nm, GCN goodness to lower price tiers and power envelopes. AMD hasn't broken new ground here; it's simply made a year-old architecture available to more folks.
As our benchmarks have shown, the wait has been worth it. The Radeon HD 8790M beats the pants off its predecessor, and it does so while consuming less power at idle and only marginally more under load.
Before we sign off, we should remind readers that clock speeds and memory configurations will vary in the wild. So, not all of the 8790M or 7690M GPUs you find out there will be equivalent to those we tested. Some will feature slower DDR3 memory and may have lower core clock speeds, as well.
68 comments — Last by CampinCarl at 10:13 AM on 01/01/13
|The curtain comes up on AMD's Vega architectureRadeons get ready for the workloads of the future||155|
|Nvidia unveils its GTX 1050 and GTX 1050 Ti for laptopsThe pint-size Pascal empowers portable players||16|
|Gigabyte's P57X v6 gaming notebook reviewed Full-fat Pascal comes to notebooks||20|
|The Tech Report's winter 2016 mobile staff picksThe best tablets, Chromebooks, laptops, and phones||42|
|AMD opens up machine learning with Radeon InstinctVega lights the way||65|
|Radeon Software Crimson ReLive Edition: an overviewStream, capture, Chill||103|
|Nvidia's GeForce GTX 1060 graphics card reviewedDouble trouble||153|
|Nvidia's GeForce GTX 1050 and GTX 1050 Ti graphics cards unveiledThe everyman's Pascal cards arrive||49|
|Raspberry Pi Compute Module 3 flaunts a quad-core SoC||13|
|Imagination Technologies freshens up mid-range PowerVR GPUs||2|
|be quiet! unveils entry-level Pure Base 600 chassis||15|
|Sapphire launches Radeon RX 460 with 1024 SPs in China||11|
|Google RAISR upsamples thumbnails for massive bandwidth savings||56|
|Biostar's Z270 boards race to the finish||20|
|Synology RT2600ac offers up speedy Wi-Fi and tight controls||5|
|Deals of the week: a gaming monitor and system components||17|
|Nintendo reveals Switch launch date, pricing, and initial line-up||70|