Final Words

As with all previous AMD APU launches, we're going to have to break this one down into three parts: CPU, the promise of HSA and GPU.

In a vacuum where all that's available are other AMD parts, Kaveri and its Steamroller cores actually look pretty good. At identical frequencies there's a healthy increase in IPC, and AMD has worked very hard to move its Bulldozer family down to a substantially lower TDP. While Trinity/Richland were happy shipping at 100W, Kaveri is clearly optimized for a much more modern TDP. Performance gains at lower TDPs (45/65W) are significant. In nearly all of our GPU tests, a 45W Kaveri ends up delivering very similar gaming performance to a 100W Richland. The mainstream desktop market has clearly moved to smaller form factors and it's very important that AMD move there as well. Kaveri does just that.

In the broader sense however, Kaveri doesn't really change the CPU story for AMD. Steamroller comes with a good increase in IPC, but without a corresponding increase in frequency AMD fails to move the single threaded CPU performance needle. To make matters worse, Intel's dual-core Haswell parts are priced very aggressively and actually match Kaveri's CPU clocks. With a substantial advantage in IPC and shipping at similar frequencies, a dual-core Core i3 Haswell will deliver much better CPU performance than even the fastest Kaveri at a lower price.

The reality is quite clear by now: AMD isn't going to solve its CPU performance issues with anything from the Bulldozer family. What we need is a replacement architecture, one that I suspect we'll get after Excavator concludes the line in 2015.

In the past AMD has argued that for the majority of users, the CPU performance it delivers today is good enough. While true, it's a dangerous argument to make (one that eventually ends up with you recommending an iPad or Nexus 7). I have to applaud AMD's PR this time around as no one tried to make the argument that CPU performance was somehow irrelevant. Although we tend to keep PR critique off of AnandTech, the fact of the matter is that for every previous APU launch AMD tried its best to convince the press that the problem wasn't with its CPU performance but rather with how we benchmark. With Kaveri, the arguments more or less stopped. AMD has accepted its CPU performance is what it is and seems content to ride this one out. It's a tough position to be in, but it's really the only course of action until Bulldozer goes away.

It's a shame that the CPU story is what it is, because Kaveri finally delivers on the promise of the ATI acquisition from 2006. AMD has finally put forth a truly integrated APU/SoC, treating both CPU and GPU as first class citizens and allowing developers to harness both processors, cooperatively, to work on solving difficult problems and enabling new experiences. In tests where both the CPU and GPU are used, Kaveri looks great as this is exactly the promise of HSA. The clock starts now. It'll still be a matter of years before we see widespread adoption of heterogeneous programming and software, but we finally have the necessary hardware and priced at below $200.

Until then, outside of specific applications and GPU compute workloads, the killer app for Kaveri remains gaming. Here the story really isn't very different than it was with Trinity and Richland. With Haswell Intel went soft on (socketed) desktop graphics, and Kaveri continues to prey on that weakness. If you are building an entry level desktop PC where gaming is a focus, there really isn't a better option. I do wonder how AMD will address memory bandwidth requirements going forward. A dual-channel DDR3 memory interface works surprisingly well for Kaveri. We still see 10 - 30% GPU performance increases over Richland despite not having any increase in memory bandwidth. It's clear that AMD will have to look at something more exotic going forward though.

For casual gaming, AMD is hitting the nail square on the head in its quest for 1080p gaming at 30 frames per second, albeit generally at lower quality settings. There are still a few titles that are starting to stretch the legs of a decent APU (Company of Heroes is practically brutal), but it all comes down to perspective. Let me introduce you to my Granddad. He’s an ex-aerospace engineer, and likes fiddling with stuff. He got onboard the ‘build-your-own’ PC train in about 2002 and stopped there – show him a processor more than a Pentium 4 and he’ll shrug it off as something new-fangled. My grandfather has one amazing geeky quality that shines through though – he has played and completed every Tomb Raider game on the PC he can get his hands on.

It all came to a head this holiday season when he was playing the latest Tomb Raider game. He was running the game on a Pentium D with an NVIDIA 7200GT graphics card. His reactions are not the sharpest, and he did not seem to mind running at sub-5 FPS at a 640x480 resolution. I can imagine many of our readers recoiling at the thought of playing a modern game at 480p with 5 FPS. In the true spirit of the season, I sent him a HD 6750, an identical model to the one in the review today. Despite some issues he had finding drivers (his Google-fu needs a refresher), he loves his new card and can now play reasonably well at 1280x1024 on his old monitor.

The point I am making with this heart-warming/wrenching family story is that the Kaveri APU is probably the ideal fit for what he needs. Strap him up with an A8-7600 and away he goes. It will be faster than anything he has used before, it will play his games as well as that new HD 6750, and when my grandmother wants to surf the web or edit some older images, she will not have to wait around for them to happen. It should all come in with a budget they would like as well.

Drawing Performance Conclusions
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  • boozed - Tuesday, January 14, 2014 - link

    You must be a hoot at parties. Reply
  • boozed - Wednesday, January 15, 2014 - link

    And I hit reply on the wrong bloody comment. My apologies... Reply
  • monsieurrigsby - Wednesday, January 29, 2014 - link

    I'm a bit slow to the party, but talk of discrete GPUs leads me to the main question I still have that I don't see explained (possibly because the authors assume deeper understanding of CPU/GPU programming), and haven't seen discussed elsewhere. (I've not looked *that* hard...)

    If you have a Kaveri APU and a mid/high-end discrete GPU that won't work with Dual Graphics (if it arrives), what processing can and can't use the on-APU GPU? If we're talking games (the main scenario), what can developers offload onto the onboard GPU and what can't they? What depends on the nature of the discrete card (e.g., are modern AMD ones 'HSA enabled' in some way?)? If you *do* have a Dual Graphics capable discrete GPU, does this still limit what you can *explicitly* farm off to the onboard GPU?

    My layman's guess is that GPU compute stuff can still be done but, without dual graphics, stuff to do with actual frame rendering can't. (I don't know enough about GPU programming to know how well-defined that latter bit is...)

    It's just that that seems the obvious question for the gaming consumer: if I have a discrete card, in what contexts is the on-APU GPU 'wasted' and when could it be used (and how much depends on what the discrete card is)? And I guess the related point is how much effort is the latter, and so how likely are we to see elements of it?

    Am I missing something that's clear?
    Reply
  • monsieurrigsby - Wednesday, January 29, 2014 - link

    Plus detail on Mantle seems to suggest that this might provide more control in this area? But are there certain types of things which would be *dependent* on Mantle?
    http://hothardware.com/News/How-AMDs-Mantle-Will-R...
    Reply
  • nissangtr786 - Tuesday, January 14, 2014 - link

    I told amd fanboys the fpu on intel and the raw mflops mips ofintel cpu destroy current a10 apus, its no real suprise all those improvement show very little in benchmarks with kaveri steamroller cores. amd fanboys said it will reach i5 2500k performance, I said i3 4130 but overall i3 4130 will be faster in raw performance and I am right. I personally have an i5 4430 and it looks like i5's still destroy these a10 apu in raw performance.

    http://browser.primatelabs.com/geekbench3/326781
    browser.primatelabs.com/geekbench3/321256
    a10-7850k Sharpen Filter Multi-core 5846 4.33 Gflops
    browser.primatelabs.com/geekbench3/321256
    i5 4430 Sharpen Filter Multi-core 11421 8.46 Gflops
    Reply
  • gngl - Tuesday, January 14, 2014 - link

    "I personally have an i5 4430 and it looks like i5's still destroy these a10 apu in raw performance."

    You seem to have a very peculiar notion of what "raw performance" means, if you're measuring it in terms of what one specific benchmark does with one specific part of the chip. There's nothing raw about a particular piece of code executing a specific real-world benchmark using a particular sequence of instructions.
    Reply
  • chrnochime - Tuesday, January 14, 2014 - link

    Who cares what CPU you have anyway. If you want to show off, tell us you have at least a 4670k and not a 4430. LOL Reply
  • keveazy - Tuesday, January 14, 2014 - link

    It's relevant that he used the i5 4430 in his comment. Compare the price range and you'll see. These AMD apu's are useless unless your just looking to build a PC that's not meant to handle heavily threaded tasks. Reply
  • tcube - Thursday, January 16, 2014 - link

    Ok... heavily threaded tasks ok... examples! Give me one example of one software 90% of pc users use 90% of the time that this apu can't handle... then and ONLY then is the cpu relevant! Other then that it's just bragging rights and microseconds nobody cares about on a PC!

    Instead we do care to have a chip that plays anything from hd video to AAA 3d games and also is fast enough for anything else and don't need a gpu for extra cost, power usage heat and noise! And that ain't any intel that fits on a budget!
    Reply
  • keveazy - Saturday, January 18, 2014 - link

    I'll give you 1 example. Battlefield 4. Reply

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