Testing Platform

For our Kaveri testing AMD sent us two APUs – the top 95W A10-7850K SKU and the configurable TDP version of the A8-7600 APU, the latter of which can be set at 45W or 65W through the BIOS. The A8-7600 was tested in both power configurations, ultimately the difference between them both being only a few hundred MHz. The 65W configuration is only 200 MHz off the A10-7700K base frequency, and incidentally they both turbo to the same frequency of 3.8GHz.

Kaveri will be the first APU put through the mangle in terms of my new 2014 benchmarking suite, focusing on more compute tasks, video conversion in different software, and more real world scenarios geared for the prosumer.

We must thank the following companies for their contribution to the test beds:

Our test setup for AMD is as follows:

AMD APU TestBed
  SKU Cores CPU /
Turbo
DRAM
MHz
Power IGP SPs GPU
MHz
Kaveri APUs A10-7850K 2M/4T 3.7 GHz
4.0 GHz
2133 95W R7 512 720 MHz
A8-7600 2M/4T 3.3 GHz
3.8 GHz
2133 65W R7 384 720 MHz
A8-7600 2M/4T 3.1 GHz
3.3 GHz
2133 45W R7 384 720 MHz
Richland APUs A10-6800K 2M/4T 4.1 GHz
4.4 GHz
2133 100W 8670D 384 844 MHz
A10-6700T 2M/4T 2.5 GHz
3.5 GHz
1866 45W 8650D 384 720 MHz
A8-6500T 2M/4T 2.1 GHz
3.1 GHz
1866 45W 8550D 256 720 MHz
Trinity APUs A10-5800K 2M/4T 3.8 GHz
4.2 GHz
2133 100W 7660D 384 800 MHz
A8-5500 2M/4T 3.2 GHz
3.7 GHz
1866 65W 7560D 256 760 MHz
Memory AMD Radeon 2 x 8 GB DDR3-2133 10-11-11 1.65V
G.Skill RipjawsX 4 x 4 GB DDR3-2133 9-11-11 1.65V
G.Skill RipjawsZ 4 x 4 GB DDR3-1866 8-9-9 1.65V
Motherboards ASRock FM2A88X Extreme6+
ASRock FM2A88X-ITX+
Power Supply OCZ 1250W ZX Series
Storage OCZ 256GB Vertex 3 SSDs
Operating System Windows 7 64-bit SP1 with Core Parking updates
Video Drivers Graphics Driver Build 13.300 RC2 for Radeon R7
Catalyst 13.12 for all others

Unfortunately we were not able to source a 65W Richland part in time, however a midrange 65W Trinity part was on hand. The important thing to note is that within each power bracket, both the CPU frequencies and the supported memory changes depending on the architecture and the binning process AMD uses. The benchmarks in this review are run at the processors' maximum supported frequency, rather than any AMD Memory Profiles which the processor can also support via overclocking. This has implications in conjunction with the IPC or MHz difference.

For this review we also took a few Intel processors of varying TDPs:

Intel TestBed
  SKU Cores CPU /
Turbo
DRAM
MHz
Power IGP SPs GPU
MHz
Sandy Bridge i5-2500K 4C/4T 3.3 GHz
3.7 GHz
1600 95W HD 3000 12 850
Ivy Bridge i3-3225 2C/4T 3.3 GHz 1600 55W HD 4000 16 550
i7-3770K 4C/8T 3.5 GHz
3.9 GHz
1600 77W HD 4000 16 550
Haswell i3-4330 2C/4T 3.5 GHz 1600 54W HD 4600 20  
i7-4770K 4C/8T 3.5 GHz
3.9 GHz
1600 84W HD 4600 20  
i7-4770R
+ Iris Pro
4C/8T 3.2 GHz
3.9 GHz
1600 65W HD 5200 40  
Memory ADATA XPG 2 x 8 GB DDR3L-1600 9-11-9 1.35V
Motherboards ASUS Z87 Gryphon
Power Supply OCZ 1250W ZX Series
Storage OCZ 256GB Vertex 3 SSDs
Operating System Windows 7 64-bit SP1 with Core Parking updates
Video Drivers 15.28.20.64.3347 for HD 3000
15.33.8.64.3345 for HD 4000+4600

Unfortunately our stock of i5 and i3 processors is actually rather limited – Intel prefers to source the i7s when we review those platforms, but I was able to use a personal i3-3225 from my NAS and we sourced the Haswell i3 as well. Given that Ganesh has the BRIX Pro in for review, I asked him to run as many benchmarks from our gaming suite as I could, to see how well Intel's Haswell eDRAM (Crystalwell) equipped processors stand up to Kaveri’s GCN mêlée.

For reference we also benchmarked the only mid-range GPU to hand - a HD 6750 while connected to the i7-4770K.

Overclocking and Underclocking the A10-7850K

As part of the final testing for this review we did some basic overclocking on the A10-7850K processor. Despite our processor being an engineering sample, we would assume that it is as close/identical to the retail silicon as you can get, given that this is meant to be a review on which people make purchasing decisions.

Our A10-7850K CPU starts out with a peak voltage under load of 1.24 volts when running OCCT. From this point we clocked back to 3.5 GHz and 1.100 volts, with a full-on CPU load line calibration and adjusted turbo mode to equal the base clock. Our standard overclocking test applies – OCCT for five minutes, PovRay, and new for 2014, a run of LuxMark. At our settings, we test the system for stability by running these tests. If the system fails, the CPU voltage is raised 0.025 volts until the system is stable during testing. When stable, the system multiplier is then raised and our testing moves on to the new MHz range.

Our results are as follows:

There was an unexpected jump in the voltage required to move from 3.5 GHz to 3.6 GHz (likely hitting the limits of what we can easily attain on this process). The system would not remain stable until 1.225 volts as set in the BIOS.

We also did the power tests, measuring the power draw at the wall as the delta between idle and OCCT load:

As expected, raising the voltage has a significant effect on the power consumption of the processor. One thing I should point out is that even at stock, the power delivery VRMs were getting very hot to touch – so much in fact that the system generated significant errors without an active fan on them. This got worse as the system was overclocked. I am not sure if this is an effect of the platform or the motherboard, but it will be something to inspect in our motherboard reviews going forward.

The Kaveri Socket and Chipset Line Up: Today and Q1, No Plans for FX or Server(?) CPU Performance
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  • Fox5 - Wednesday, January 15, 2014 - link

    There's also the issue of the Iris Pro's 128MB edram. At a certain point, it probably is insufficient for the settings and resolution.
  • BSMonitor - Wednesday, January 15, 2014 - link

    Power consumption numbers?? Interesting to see what adding that many transistors (particularly 128 GPU cores did to those)
  • Da W - Wednesday, January 15, 2014 - link

    242 comments so far. Whatever people say, AMD still interests a lot of people and they have a future ahead of them.
  • thomascheng - Wednesday, January 15, 2014 - link

    Lets hope they do well, or we will be stuck with buying $1000 Intel CPUs and Nvidia GPUs.
  • TheJian - Wednesday, January 15, 2014 - link

    "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."

    Maybe if they'd said for 1280x1024 gaming your comment would be true. Most of the games have mins at 1080p well below 20, and some even avg below 30. This resolution is NOT playable on these crap chips. Buy a vid card and Intel. Period. I really thought these would be faster, but then the downclock due to process happened. Gains in games where you are STILL unplayable isn't a gain. It is a waste of space to benchmark things you can't actually play at. I would rather have seen a dozen games benched at 1280x1024 and a few you KNOW you could run above 30fps at 1680x1050. 1080p here was pointless. AMD should be derided for even mentioning this res with so many games not even playable at avg fps never mind what happens when you click the MIN button in your charts.

    Discrete clearly has long legs, as anyone building one of these machines with the new APUs will quickly realize they need to buy discrete to enhance their gaming. I really don't think the dire situation here at 1080p will change until 20nm or more, where you may at that point have MORE games that CAN run 1080p ok, vs what you see here where it's just a joke today.

    The games don't even look the same when turning off every feature possible in the game just to hit 30fps. Do you want your games to look like a nintendo 64, or a PC? They should have grown the die a bit for more gpu, so at least 1680x1050 would be pretty good. I don't see AMD making money on cpus for 2yrs :( That means consoles + gpus have to hold the company up and that won't be enough to keep up with R&D in mobile, gpu, cpu. Consoles sold 7mil so far, so at $10-15 per chip ($100 price? per console assuming 15% margin? if they even get that) we're talking about a max of 105mil profits from consoles for the quarter. If they don't keep selling like it's launch month for the next 12 months I see them slowly getting weaker. They owe GF 200mil, so 4 of these console quarters would be ~400mil which is 1/2 blown on GF fines, and the other 200mil goes to interest on their huge debt each year. They need to make some REAL money on cpu/gpu/mobile or this never gets better right? We know cpu is basically out for 2yrs as they say in this article. OUCH. So gpu/mobile has to make something in those two years or this just gets worse and drivers etc will see more phase 1, 2, 3 fixing crap for ages.

    The only impressive thing I saw here was Mantle perf claimed by AMD in BF4. But how many times can you afford $8mil to get this done? I'm sure they amped things up for the first time showcase BF4, but how many times can you even afford $2-4mil for this stuff? And then do you get what the dev said in the AMD APU show (only one BTW), a 20% not being unreasonable for your efforts? Far below $8mil for apparently 45% in BF4 right? Devs will opt for the 2weeks to transfer a game to MOBILE first as NV showed can be done with any openGL game (all ps3, ps4 games, many pc games etc) like Serious Sam3 and Trine2 (most of the time according to anandtech was spent on controls, NOT the porting). Unreal 3 engine ported in 4 (yes...FOUR) days by epic/mozilla and it only took 10 people or so. Dice said 2-3 months on mantle. Devs might do 2 weeks just for more sales to a 1.2B unit market on mobile, they will need PAYMENT to do it for Mantle which gets ZERO extra profits (only makes people happy they bought AMD, no extra cash right?). I really hope ARM takes off on desktops, because we currently have an Intel only race and need someone with CASH to fight them. Bring on K1 (and all it's enemies) and all the games for mobile this will create (ported or new, I don't own a ps3 so I'd buy some of those ported that I can't get now). Since we have no real x86 competition any more we need ARM to pick up AMD's slack.
  • Novaguy - Wednesday, January 15, 2014 - link

    Its going to depend on the settings; other reviewers who did 1080p + low to medium settings demonstrated playable frame rates for the a8 but not the intel igps.
  • mikato - Wednesday, January 15, 2014 - link

    Ian/Ryan - This seems wrong - "For the 100W APUs at 1280x1024, there is almost no movement between the Richland and the Trinity APUs, except for Company of Heroes" under "IGP Gaming, 1280x1024". In this particular graph, it shows an improvement from Trinity to Richland and then not much improvement from there to Kaveri, except for Company of Heroes.
  • Ryan Smith - Wednesday, January 15, 2014 - link

    Noted and fixed. Thank you.
  • tekphnx - Wednesday, January 15, 2014 - link

    Looks like a pretty nice improvement for its intended market, namely the HTPC and casual gaming crowd. Calling the onboard GPU decent at 1080p is a laugh though, as other people have said. For 720p, sure, but not 1080p.

    Prices have shot up from the previous generation, which is unwelcome. And I very much lament the omission of Steamroller from the FX roadmap as an FX owner myself. AMD shouldn't abandon FX... the least they could have done if they're abandoning FX is to include a 6-core Kaveri part at the top end, but it looks like that's not materializing either.
  • zodiacsoulmate - Wednesday, January 15, 2014 - link

    first 4 pages are way better than the last 4 pages :) anyway a great article i read like half an hour

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