The Testing

A number of factors about the A8-7670K processor suggest that this is "another release of the same sort of stuff," albeit with increased frequencies. Nevertheless, we put the processor through our regular tests, to see what would happen. Our bench suite this time had one omission and one addition. For whatever reason, Linux Bench refused to run, with Ubuntu 14.04 throwing a hissy fit and not willing to start. I’m not sure if this was a BIOS issue or something more fundamental with the software stack, but it was odd. The addition, as the title of the review alluded to, is a Rocket League benchmark. At this time, we haven’t run it on many systems, but the A8-7670K is the sort of APU that enables games like Rocket League. Rocket League is a good contender for our 2016 CPU/APU benchmark suite on the integrated graphics side of things, and this serves as a good tester in the wild.

All of our regular benchmark results can also be found in our benchmark engine, Bench. Rocket League will be added in the future with the 2016 updates.

Test Setup

Test Setup
Processor AMD A8-7670K 
2 Modules, 4 Threads
3.6 GHz (3.9 GHz Turbo)
R7 Integrated Graphics
384 SPs at 756 MHz
Motherboards MSI A88X-G45 Gaming
Cooling Cooler Master Nepton 140XL
Power Supply OCZ 1250W Gold ZX Series
Corsair AX1200i Platinum PSU
Memory G.Skill 2x8 GB DDR3-2133 1.5V
Memory Settings JEDEC
Video Cards ASUS GTX 980 Strix 4GB
MSI GTX 770 Lightning 2GB (1150/1202 Boost)
ASUS R7 240 2GB
Hard Drive Crucial MX200 1TB
Optical Drive LG GH22NS50
Case Open Test Bed
Operating System Windows 7 64-bit SP1

Many thanks to...

We must thank the following companies for kindly providing hardware for our test bed:

Thank you to AMD for providing us with the R9 290X 4GB GPUs.
Thank you to ASUS for providing us with GTX 980 Strix GPUs and the R7 240 DDR3 GPU.
Thank you to ASRock and ASUS for providing us with some IO testing kit.
Thank you to Cooler Master for providing us with Nepton 140XL CLCs.
Thank you to Corsair for providing us with an AX1200i PSU.
Thank you to Crucial for providing us with MX200 SSDs.
Thank you to G.Skill and Corsair for providing us with memory.
Thank you to MSI for providing us with the GTX 770 Lightning GPUs.
Thank you to OCZ for providing us with PSUs.
Thank you to Rosewill for providing us with PSUs and RK-9100 keyboards.

Load Delta Power Consumption

Power consumption was tested on the system while in a single GTX 770 configuration with a wall meter connected to the OCZ 1250W power supply. This power supply is Gold rated, and as I am in the U.K. on a 230-240 V supply, that leads to ~75% efficiency at greater than 50W, and 90%+ efficiency at 250W, suitable for both idle and multi-GPU loading. This method of power reading allows us to compare the power management of the UEFI and the board to supply components with power under load, and includes typical PSU losses due to efficiency.

Power Consumption Delta: Idle to AVX

The TDP for the A8-7670K is up at 95W, similar to many other AMD processors. However, at load, ours drew only an additional 83W, giving some headroom.

AMD A8-7670K Overclocking

For this review, we even tried our hand at overclocking on the MSI A88X-G45 Gaming motherboard and managed to get 4.6 GHz stable.

Methodology

Our standard overclocking methodology is as follows. We select the automatic overclock options and test for stability with POV-Ray and OCCT to simulate high-end workloads. These stability tests aim to catch any immediate causes for memory or CPU errors.

For manual overclocks, based on the information gathered from previous testing, we start off at a nominal voltage and CPU multiplier, and the multiplier is increased until the stability tests are failed. The CPU voltage is increased gradually until the stability tests are passed, and the process is repeated until the motherboard reduces the multiplier automatically (due to safety protocol) or the CPU temperature reaches a stupidly high level (100º C+, or 212º F). Our test bed is not in a case, which should push overclocks higher with fresher (cooler) air.

Overclock Results

MSI’s motherboard doesn’t allow fixed voltages to be set but prefers to rely on an offset system only. There is a problem here that we are also fighting a DVFS implementation, which will automatically raise the voltage when an overclock is applied, with an end result of stacking the overclock voltage offset on top of the DVFS voltage boost. On our cooling system, the processor passed quite easily up to 4.6 GHz without much issue, but 4.7 GHz produced an instant blue screen when a rendering workload was applied. Hitting 4.6 GHz on a midrange AMD processor is quite good, indicating our sample is some nice silicon, but your mileage might vary.

The AMD A8-7670K Review Office and Web Performance
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  • Shadowmaster625 - Wednesday, November 18, 2015 - link

    Where is the i3-6100 in those gaming tests? Reply
  • Ian Cutress - Wednesday, November 18, 2015 - link

    We haven't had one in to test. Reply
  • Samus - Wednesday, November 18, 2015 - link

    Yeah, my guess is the i3-6100 is going to render AMD's entire A-series irrelevant (unless you're looking for a sub-$100 chip) simply because of it's DX12 iGPU + DDR4. Early reviews show it to be around 15% faster than the i3-4130 in single threaded performance alone. Reply
  • tipoo - Wednesday, November 18, 2015 - link

    No option for dual graphics with a cheap Radeon though, you'd have to wait for DX12 Multiadaptor to take off, if it does. Reply
  • Samus - Wednesday, November 18, 2015 - link

    That's true. AMD still has their niche features. But I suspect Intel's 500-series IGP is going to be pretty strong against 6 of AMD's compute cores based on DDR4 bandwidth alone. Will have to wait for the review, obviously. Reply
  • hojnikb - Thursday, November 19, 2015 - link

    Why bother with dual graphics at all ?
    Just buy a beefier card and an athlon x4.

    Unless you hit the right combo, hybrid crossfire will be a mess.
    Reply
  • Flunk - Wednesday, November 18, 2015 - link

    Intel needs to work on their drivers, their current ones are a real mess. I feel like if they improved their drivers they might actually get to the point you're talking about where you could buy a system with Intel graphics for light gaming, but right now it's a really poor experience. Reply
  • tipoo - Wednesday, November 18, 2015 - link

    AMDs APUs seem more bandwidth constrained than limited by themselves. I hope they take HBM2 as an opportunity to provide at least a PS4 equivalent GPU in an APU in the coming years. Reply
  • Refuge - Wednesday, November 18, 2015 - link

    They don't plan to bring HBM to their APU's anytime soon from the product slides that they released with their HBM announcement. Reply
  • tipoo - Wednesday, November 18, 2015 - link

    Yeah, that's why I gave it a longer time frame. It's going to be high end GPU exclusive for a while, but I hope the trickle down comes fast enough. Or if not, go eDRAM. Reply

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