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
|1. GKey13 - $650||2. JohnC - $600||3. davidbowser - $501|
|4. cmpxchg - $500||5. DeadOfKnight - $400||6. danny e. - $375|
|7. the - $360||8. Ryszard - $351||9. rbattle - $350|
|10. Ryu Connor - $350|
|Asus' ROG Swift PG278Q G-Sync monitor reviewedEverything is awesome when you're part of a team||149|
|Nvidia's Shield Tablet reviewedA whole other kind of Android tablet||29|
|Intel's Broadwell processor revealedThe 14-nm Core M aims to upend the tablet market||86|
|First impressions of Nvidia's Shield TabletMobile gaming done right||43|
|Android on x86: A quick look at Asus' Memo Pad ME176C tabletA 7" Bay Trail quad for $149||50|
|Juno dev platform lays foundation for 64-bit Android on ARMBootstrapping a massive transition||34|
|TR's June 2014 mobile staff picksComplements to our desktop PCs||48|
|A first look at AMD's Kaveri APU for notebooksKaveri goes mobile||61|
|Corsair's Graphite Series 380T case reviewed||9|
|Friday night topic: why the fear of autonomous machines?||8|
|Corsair's new DDR4 modules are rated for 3300 MT/s||8|
|Deal of the week: A 240GB SSD for only $80||2|
|Asus' X99 Deluxe motherboard reviewed||8|
|Intel's Core i7-5960X processor reviewed||51|
|Steam's in-home streaming accelerated by GeForce GPUs||19|
|Apple sets date for expected iPhone 6 reveal||18|
|Now we can lose our data 8TB at a time.||+42|