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3850 Review: Llano Rocks Entry

Time:2018-04-28 09:54Turbochargers information Click:

review Entry Rocks 3850 Llano

Earlier this month we previewed AMD's Llano architecture in a notebook environment. Now we have the desktop version with a 100 W TDP. How much additional performance can the company procure with a loftier thermal ceiling and higher clocks?

Editor's Note: As we've done so many times before, we're partnering up with CyberPower to give away one of the first Llano-based desktop machines, which the builder calls its Gamer Ultra, to one of our readers. Flip through our review and, on the last page, enter to win a brand new PC, compliments of CyberPower!

A8-3850 Makes Its Desktop Debut

Don Woligroski did an absolutely killer job on our first look at AMD’s Llano architecture. If you haven’t yet read that story and you want to know more about the plumbing inside the company’s first mainstream APU, you really owe it to yourself to check out The AMD A8-3500M APU Review: Llano Is Unleashed before diving into this piece.

Because Don covered the underlying architecture so well, I’m going to use our first experiences with AMD’s Llano-based desktop platform, code-named Lynx, to dive deeper into the stuff I know you guys love: benchmark results and analysis. What kind of performance can you expect out of Dual Graphics? How does Sandy Bridge with discrete graphics compare? What effect does memory performance have on gaming frame rates? How does integrated USB 3.0 support measure up to some of the add-on controllers we’ve seen? I’ll answer all of that.

But first let’s go over the basics of AMD’s first desktop-class Llano-based APUs.

3850 Review: Llano Rocks Entry

Llano: The Recession-Friendly APU

Oh, Audi would be so proud (or maybe not, given the entry-level pedigree of these processors). AMD is using the same A8 and A6 designators to distinguish between the perceived performance levels of its four launch SKUs.

There are two A8s and two A6s. The Llano-based flagship is A8-3850, a 100 W part with Radeon HD 6550D graphics, four execution cores with 1 MB L2 cache each, and a 2.9 GHz clock rate. That part does not offer Turbo Core support—the only way to get it running faster than 2.9 GHz is through overclocking. AMD says to expect pricing around $135.

3850 Review: Llano Rocks Entry

The A6-3650 is also rated at 100 W, even though it’s armed with Radeon HD 6530D graphics and a more conservative 2.6 GHz clock rate (again, Turbo Core isn’t available). The -3650 boasts four cores as well, includes the same 4 MB of L2 cache, and support DDR3-1866 data rates, just like the other three models. That one is expected to run $115.

Model
GPU
TDP
Cores
Base CPU Clock
Max. Turbo
L2 Cache
Shaders
GPU Clock
Turbo Core

A8-3850
HD 6550D
  100 W
  4
  2.9 GHz
  -
  4 MB
  400
  600 MHz
  No
 
A8-3800
HD 6550D
  65 W
  4
  2.4 GHz
  2.7 GHz
  4 MB
  400
  600 MHz
  Yes
 
A6-3650
HD 6530D
  100 W
  4
  2.6 GHz
  -
  4 MB
  320
  443 MHz
  No
 
A6-3600
HD 6530D
  65 W
  4
  2.1 GHz
  2.4 GHz
  4 MB
  320
  443 MHz
  Yes
 


Interestingly, dipping down to the 65 W level doesn’t seem to sacrifice much in the way of functionality. AMD’s A8-3800 includes the capable Radeon HD 6550D engine, quad-core Stars architecture, and 4 MB L2 repository. However, Turbo Core helps compensate for a fairly severe drop to 2.4 GHz, kicking frequency up to 2.7 GHz in situations where thermal headroom allows for it. Unfortunately, AMD didn’t send over any Turbo Core-equipped processors for testing, so it’s impossible to gauge how much time this four-core part spends at its elevated setting.

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