In CB11.5, the efficiency gains from Steamroller clearly didn't offset the frequency loss in single-threaded testing. The Intel Core i3-4330 scored 1.55, and the Intel Core i3-4670S scored 1.69. In single-threaded mode, the A10-7850K scored just 1.03, compared with 1.14 for the AMD A10-6800K. In the 3D rendering Cinebench 11.5 benchmark test, we saw both the improvements and the limitations of the new Steamroller architecture.
Amd k10 7850k pro#
Both systems used a Samsung 840 Pro Series 256GB solid-state drive (SSD). Both of the Intel chips were tested using Intel's HD 4600 Graphics on Gigabyte Z87X-D3H motherboard. Our comparison chips from Intel were the dual-core Intel Core i3-4330 (3.5GHz, no Turbo Mode, Hyper-Threading enabled) and the quad-core Intel Core i5-4670 (3.1GHz base, 3.8GHz Turbo, no Hyper-Threading). We tested the A10-7850K and the AMD A10-6800K in an Asus A88X Pro motherboard with 8GB of DDR3-2133. Kaveri cuts that penalty in half, to about 10 percent, and we can still see the benefits in some multithreaded workloads. This means a quad-core Piledriver APU scales like a triple-core AMD K10. Piledriver-derived processors have historically taken a scaling hit of about 20 percent. The Steamroller core has one set of advantages that it hasn't lost to a decreasing clock speed the CPU takes a far smaller penalty when it scales in multithreaded scenarios. That's an 8- to 12-percent frequency loss-enough to neatly remove most of the performance improvements the Steamroller core offers. As a result, the A10-7850K runs at 3.7GHz base with a 4.0GHz Turbo, compared with 4.1GHz base and 4.4GHz Turbo for the AMD A10-6800K. In the case of the A10-7850K, AMD's transition to standard bulk silicon 28nm manufacturing at GlobalFoundries, rather than the specialized 32nm SOI (silicon-on-insulator) technology it used in the past, hurt the chip's maximum clock frequency. Combine the fact that the Steamroller architecture is more efficient than AMD's older Piledriver CPU core, and you've got a recipe for strong performance gains. The real-world clock speed difference between the two cores was at least 15 to 20 percent. That's because AMD's old A8-6500T has a base clock speed of 2.1GHz and a burst clock of 3.1GHz, while the new A8-7600 runs at 3.1GHz base with a boost up to about 3.4GHz. CPU performance between the A10-7850K and the AMD A10-6800K was a great deal closer in our tests. In our AMD A8-7600 review, we noted that the new 45W chip was far faste, in every metric than the 45W chip it replaced. Still, we expect the performance benefits of the A10-7850K's GPU to outshine the higher clock speed on the older part. This is a significant step forward compared with the AMD A10-6800K, which integrated just 384 cores (though it did clock them faster, at 844MHz, compared with the A10-7850K's 720MHz). The A10-7850K is a quad-core chip with 512 GPU cores based on AMD's GCN architecture. Unlike the AMD A8-7600, which was a huge advance over the AMD A8-6500T, the A10-7850K is a much more modest improvement over its last-generation counterpart. The A10-7850K moves the bar forward on the CPU side, but most of the improvements here are focused on the GPU. Architecturally, the two cores are built from the same blocks: The new Steamroller CPU and a new GPU core are based on AMD's Graphics Core Next (GCN). Now, we're looping back to include the AMD A10-7850K ($189), the company's top-of-the-line APU, and the successor to the previous high-end chip, the AMD A10-6800K. Best Malware Removal and Protection SoftwareĪ few months ago, we covered the launch of the AMD A8-7600 and the new core's significantly improved performance in the 45W TDP envelope.
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