I'm very impressed by what they've achieved considering what they have to work with:
no new core architecture, no new process, no new GPU architecture, no new memory.
That's pretty good, isn't it? About on par in MT with Intel Broadwell 5200U (CB 15 @ 263), and in ST with Intel Broadwell 5010U (CB 15 @ 86). For reference see this.
Also, the iGPU is much better on the AMD APU.
That they have been able to achieve this on 28 nm, when Intel is on 14 nm is pretty amazing. I think AMD's uArch engineers should be applauded for this.
Intel like cTDP behaviour.Moving back to Carrizo, what is the TDP? The devices are optimized for a 15W TDP level but they will go up to 35W if needed. Normally you take a part and bin it on the top rated speed it can go, then secondarily on power. This time around AMD doesnt differentiate on TDP levels they take a fixed TDP, in this case 35W and see what the parts can run at while staying under that cap. So instead of being binned on peak frequency, Carrizo is binned on peak power use.
This allows AMD to do something interesting, since the parts are optimized for a fixed wattage, they are all shipped as 35W parts. An OEM can then set the peak TDP based on the thermals of the design in question, if it is thin and light, 15W, big and heavy, 35W. This only takes a BIOS or firmware change, the underlying silicon is still the same.
The end result is that the wattage of Carrizo ends up not determining peak frequency, it is the same regardless of the setting, but how long the part can be resident at that frequency. If a theoretical Carrizo is specced for 2.0GHz CPU and can sit at that frequency all day at 35W, cutting it down to 30W may mean it can only sit there for 95% of the time. As you lower the TDP setting, turboing to the top bin comes more infrequently. In short the peak turbo is the same, how often and how long a device sits there is what the wattage slider controls.
it actually has ddr4 support.
I was thinking more of HBM.
Still its good they put that in. I'm going to guess DDR4 is not generally available / not being implemented by OEM's, different motherboard probably. Is the LP DDR4 standard even approved yet?
I was thinking more of HBM.
Still its good they put that in. I'm going to guess DDR4 is not generally available / not being implemented by OEM's, different motherboard probably. Is the LP DDR4 standard even approved yet?
best write up so far, no offense AT...
http://semiaccurate.com/2015/06/03/amd-goes-detail-carrizo/
Intel like cTDP behaviour.
Must synergise well with their stapm tech.
Nope, it has to do with R&D. It only seems easyFor years I wondered why they didn't do this. Must have something to do with market segmentation /revenue management.
http://www.jagatreview.com/2015/06/hands-on-amd-fx-8800p-carrizo/
equivalent to the i5-5200 in terms of cpu, better in terms of gpu and no clue about power use[probably higher going by my experience with kaveri]
http://www.notebookcheck.net/Intel-Core-i5-5200U-Notebook-Processor.127831.0.html
Some of AMD had warned that this version of CPU-Z can not necessarily read Carrizo properly. But fortunately the information above is pretty close to what we expected. Because it uses power scheme 'High Performance' on the windows control panel, Carrizo CPU running at its highest speed boost when idle, which is 3.4GHz .
That we do not believe there is a '15 Watt TDP writing ', we assume that this demo notebook configured with a maximum cTDP (35W) to show maximum performance. Maybe when the notebook with the APU product Carrizo already common in the market, we will be able to tell which configuration cTDP cTDP low or high.
The bkdg mentioned 1.2v ddr 4 udimm and I don't think I've seen ddr4 sodimm packages. Maybe soldiered memory?
This thing on HBM will sing can't come soon enough.I'm very impressed by what they've achieved considering what they have to work with:
no new core architecture, no new process, no new GPU architecture, no new memory.
Nope, it has to do with R&D. It only seems easy
This looks like its set to the 35W setting.
Thats fine/adequate cpu perf imo.
If power is as claimed its going to sell.
Its going to be the best cpu from amd the last 9 years or so.
The bkdg mentioned 1.2v ddr 4 udimm and I don't think I've seen ddr4 sodimm packages. Maybe soldiered memory?
This thing on HBM will sing can't come soon enough.
You know what this looks like? AMD playing games (just like intel) with TDP.
15W Kaveri doesn't exist.
Now its showing kaveri @ 15W so lets assume linear scaling and knock off 25% of the FX-7500's score putting it around 0.49 ST and 1.35 MT. Add AMD's scaling numbers and you get.