a10-7850k steamroller cores worse in some ways than richland?

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VincezioVonHook

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Sep 24, 2013
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Hey i've been looking at a kaveri 7850k for a htpc which will still be doing a fair lot of encoding and have noticed richland 6800k producing better results in Winrar/Excel/Futuremark 3dmark and so on. What is the go and is this cause for concern?

I have been reading a lot of hype about these steamroller core, but have seen little to no improvement cinebench/encode/compression wise, even with 2400-2600 ram? Is the kaveri worth the money or should i stick with the far cheaper 6800k and hybrid crossfire it with the 6570 i have here?

here is some quick stats that had me a little worried, as i will be doing a bit of cpu heavy vork on this pc...vegas pro, lots of 264 encoding and so on.
http://www.techspot.com/review/781-amd-a10-7850k-graphics-performance/page3.html
 
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The lesser clock rate was a product of a different silicon manufacturing process, designed to fit a lot more transistors on the die (to fit the iGPU). AMD usually makes processors with the Silicon-On-Insulator (SOI) method, Kaveri had to switch to a Super High Performance (SHP) method. SOI can handle those higher clock frequencies.
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ethereal essence

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The thing is that kaveri is clocked lower and uses less power than richland, but yeah most of the gains made by the die shrink was made on the gpu side and performance per watt. If you don't need the extra igpu muscle then richland would be a much more cost effective apu for you.
 
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VincezioVonHook

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pretty much what i figured.... i can get a 6800k for 150, and the 7850 is sitting at 230ish here in aust... pretty big price increase im my eyes (for basically no gains). Just wondering why they cut the clock, as o/c results show these things hitting 4.5-4.8 stable....was it a pure tdp matter?
 
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ethereal essence

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I'm pretty sure they wanted to get power consumption down with kaveri. It doesn't matter much in desktops but in today's world, desktops are an afterthought. Mobile and laptops are the primary focus and performance per watt matters a lot there.
 
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VincezioVonHook

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I would like to see how they go under full load, as my fx-6300 is a 95w part that pulls 150w during full load 264 pass, and richland can pull up to 140watt with a dgpu.... i've always been a bit skeptical about AMD's power figures. I lost my head when i saw my fx a 4.4 pulling 195watts! If they can keep in their tdp i will be quite impressed
 
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Calculatron

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The lesser clock rate was a product of a different silicon manufacturing process, designed to fit a lot more transistors on the die (to fit the iGPU). AMD usually makes processors with the Silicon-On-Insulator (SOI) method, Kaveri had to switch to a Super High Performance (SHP) method. SOI can handle those higher clock frequencies.
 
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bernardblack

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This is one of those weird scenarios and it's a shame that AMD had to place people in this situation.

The Steamroller was a major hype and thus far, their first two Kaveri APU's haven't' done anything to live up to it. It was to eliminate the very thing that plagued the Bulldozer/ Piledriver/ Richland family; the shared module/ cache setup(two cores share the same CPU cache), which hindered their performance in lightly to single threaded applications. In the end, what we have ended up with(somehow) is a more expensive processor that, so far, is only marginally superior in lightly threaded applications.

Another thing...the Kaveri CPU is clocked lower than the Richland predecessor, but it also doesn't clock as high...so, if you don't overclock, and depending on what you do the most on your PC, the two are virtually even/ on par with each other, but if you like to overclock, then the Richland more than beats out the Steamroller. For instance, the 6800k can clock in excess of 5ghz, while many struggle to achieve 4.6ghz on the Kaveri. Now, there is one major advantage to the Steamroller, and that is the much faster memory support, which, if you are using the APU, is supposedly night and day.
 
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