Test Bed

Processor AMD A8-3850 APU with AMD Graphics 6550D
4 Cores, 4 Threads
Motherboards A75 Extreme6
Cooling Corsair H50-1 Water Cooler
Power Supply Silverstone 1000W 80 PLUS Silver
Memory Patriot Viper Extreme DDR3-2000 9-10-9-27 2x4GB Kit, 1.65V
G.Skill RipjawsX DDR3-2133 9-11-9-28 4x4GB Kit, 1.65V
Memory Settings DDR3-1333 9-9-9-24 1T 2x4GB
Video Cards XFX HD 5850 1GB
Sapphire HD 5850 1GB
Video Drivers Catalyst 10.12
Hard Drive Micron RealSSD C300 256GB
Optical Drive LG GH22NS50
Case Open Test Bed—CoolerMaster Lab V1.0
Operating System Windows 7 64-bit
SATA Testing Micron RealSSD C300 256GB
USB 2/3 Testing Patriot 64GB SuperSonic USB 3.0


Results and Numbers

Most of the comparison data, as with many motherboard benchmark results, are usually CPU based—you won't see much in the way of variation for a lot of them. Here's a sneak peak at some of the more worthwhile ones:

Power Usage

The Desktop Llano system we're using, the A8-3850, is a 100W chip. Given that this is near in line with the 95W of the Sandy Bridge i5-2500K I've been using for the Cougar Point reviews, we can have an apples-to-apples comparison on power consumption against a Z68:

Total Power Consumption—Dual 5850 GPU

In terms of dual GPU usage, there's not much difference, though a 10W gap at high CPU usage with OCCT and Metro2033 for the A8-3850.

Total Power Consumption—iGPU

Compared to Z68, at low CPU conditions, the power of the A75 system is reasonable. However at high CPU conditions, or in general compared to the H67, we're using a lot of power here. Of course, Llano's iGPU is a significant step up in performance compared to Sandy Bridge, so we're not necessarily doing the same work here.

CPU Temperatures

Again, we have a prime opportunity for a comparison to Z68:

CPU Temperatures

In each situation, using a Corsair H50, the A75 Extreme6 has a couple of degrees on the ASUS Z68.

USB Performance

Using CrystalDiskMark, we probe the sequential speeds of the USB 3.0 ports, then tackle the port with our standard motherboard copy test, consisting of 33 large and ~2100 small files, total size of 1.52 GB.

USB 3.0 Performance

USB 3.0 Copy Time

In terms of USB 3.0 copy time, we're not seeing much difference between the controller based Z68 and the native A75. ASRock's XFast is still providing a healthy increase in USB 3.0 speeds as well.

3D Movement Benchmark

In terms of pure CPU throughput, we're dealing with a quad core 2.9 GHz processor in our A8-3850 APU. Against the other processor families I have at my disposal:

3D Movement Algorithm—Single Thread

3D Movement Algorithm—Multithreaded

Even though AMD has a 2.9 GHz, 4C/4T CPU, it falls way behind the i5-2500K with the same number of threads. CPU performance is definitely mainstream in this regard.


With the A8-3850, we're dealing with a 400 streaming processor model APU, the HD 6550D. Early web leaks led us to believe it's something special compared to Sandy Bridge offerings—I'm inclined to agree.

iGPU Benchmarks


A75 Extreme 6 Preview Final Thoughts
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  • Hubb1e - Tuesday, June 14, 2011 - link

    I don't understand the positioning of this board and others like it in the marketplace. Llano is a perfectly fine processor. I really like the concept and think it's a great CPU for my wife/mom/dad/brother/etc. I think it will be great in the marketplace. But at the shipping CPU speeds of less than 3ghz, it's not a gaming chip. Why all the motherboards with "Extreme" branding and 3 PCIe-x16 slots? Would anyone really get this CPU and crossfire it? That's the dumbest thing I've ever seen. The motherboards for this chip should be mainstream boards. It's an Athlon X4, not a Phenom at 3.5ghz. Maybe the motherboard makers know something I don't about the frequency capability of these chips, but unless these chips start shipping at 3.5-4ghz, there's no reason at ALL to launch an "Extreme" edition motherboard for these chips.
  • Taft12 - Tuesday, June 14, 2011 - link

    There's a very good reason to launch an "Extreme" Llano motherboard: High profit margin.
  • Lolimaster - Tuesday, June 14, 2011 - link

    You can overclock the system to 3.8Ghz~, so it's a pretty capable gaming system.

    You can also ran boinc exclusively on the IGP (openCL) and at the same time rock 6850 in CF with full speed (not as fast as on a SB/Zambesi).
  • buildingblock - Wednesday, June 15, 2011 - link

    I agree with Hubb1e. The AMD strategy on LLano is to pair a comparatively weak CPU with a much better on-die GPU. To me this adds up to a budget option for those who don't want and are never likely to need a discrete graphics card. So Llano needs a budget-priced motherboard costing around the same as Intel's H61 boards.

    To show what the economics are, the Asrock Extreme6 P67 board costs $189 from NewEgg. Reasonably a Llano version should be around the same. One of the cheapest Intel H61 boards from NewEgg is the Asrock H61M-VS at $60. You can pair this with the Intel Core i3 2100 at $125 and have a board/CPU combo for $185, probably less than the price of the Asrock Extreme6 board on its own. If $185 is too much, the Asrock H61 can be paired with the Sandy Bridge G620 at $78 from Newegg. This gives a board/CPU combo costing $138.

    In my opinion the superior GPU performance of Llano is not going to add to much in the budget market. The challenge for AMD is that they need a desktop board/CPU combo costing around $140 to compete with Intel. The fact is that Intel's HD2000 unit is good enough for normal GPU acceleration needed by Flash or browsers. The budget end of the market won't tolerate a significant price premium to pay for notionally better on-chip GPU performance which does not make any visible difference to ordinary users.
  • mino - Thursday, June 16, 2011 - link

    because having x16 plus x4 plus three x1 slots looks much less "expensive" and also give the customer much less flexibility (RAID/NIC cards anyone?).
  • Lolimaster - Tuesday, June 14, 2011 - link

    Why an i5 2500K (over $200)

    Main competition on the same price segment of A8 3850 is the i5 2400 with the much worse HD2000. No point in including HD3000 for desktop since it's a useless IGP given that it's included in the most expensive cpu (this is a major intel failure, that IGP shoul've gone in nonK i3-i5).
  • buildingblock - Wednesday, June 15, 2011 - link

    Intel has released the Core i3 2105. It's the 3.1Ghz 2100 paired with the HD3000. Already on sale and in stock at NewEgg for $140. This is a $15 premium over the ordinary 2100. The 2105 as a CPU is clearly able to match the Llano, it's just a question of how important the superior performance of the AMD graphics unit is going to be to buyers in this market segment. In my opinion, not at all - partly because they can pair the 2100/2105 with a budget priced Intel H61 motherboard and still get a motherboard/CPU combo for $200 or less. AMD will have a chance if they can get down to this price level. The problem otherwise is the elephant in the room, Ivy Bridge coming in Q2 2012. Both Bulldozer and Llano have already been delayed, and assuming they are both on the market in September this only gives AMD about two quarters before Ivy Bridge hits.
  • IanCutress - Thursday, June 16, 2011 - link

    Unfortunately, I don't have access to every CPU in every segment, being the motherboard editor. The only ones on hand were an i5-2500K, the results from my long gone i7-920, or a Fusion E-350. I have just received an X6 1100T, though didn't have time to test it. With the IGP in the i5-2500K, it seemed the best comparison tool out of those.

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  • mino - Wednesday, June 15, 2011 - link

    This is how the CPU reviews should have been written.

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