Opinons on AMD's APU's

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<quote>Forcing a SIMD vector processor to go through a shared main memory bus to get it's data will ensure it'll stall and not operate at peek efficiency. Just look at the numbers between a Llano A8 @ DDR3-1333 vs DDR3-1600 vs DDR3-1866.</quote>

That's why they invented cache. The memory controller loves it when there is more to do because it can do things like re-ordering and sending multiple commands before reading/writing to make accessing the bus more efficient. You're basing your statements on theory and not fact.
 
I never really liked the effects of Anti-Aliasing on graphics. I like the sharp look, my eyes blur the image enough. 😛
 
Wow .... after your triple post full of misinformation...

There is no talking to you

http://en.wikipedia.org/wiki/GDDR5


GDDR5 (Graphics Double Data Rate, version 5) SDRAM is a type of high performance DRAM graphics card memory designed for computer applications requiring high bandwidth. Unlike its predecessor, GDDR4, GDDR5 is based on DDR3 SDRAM memory which has double the data lines compared to DDR2 SDRAM, but GDDR5 also has 8-bit wide prefetch buffers similar to GDDR4.

If your not willing to listen to facts and truth, then there is no debate. You can continue living in your fantasy world.
 
I think you missed the important part of that quote...

but GDDR5 also has 8-bit wide prefetch buffers ...

This means that they are not the same. If they were the same then you would see GDDR5 memory sticks compatible with DDR3 slots. If you mean that oct-channel DDR3 would be more equivalent to how GDDR5 works then you would be a lot closer, but DDR3 RAM chips are not equal to GDDR5 RAM chips at all. GDDR5 uses twice the data rate per pin as DDR3 making GDDR5 more like the upcoming DDR4 standard.
 
Hi there. I'm interestingly following the discussion here and, I must say, it left a bit confused. I want to set up a desktop pc myself (it's slightly cheaper) and these are the 2 main configurations about which I haven't made up my mind yet. Here it goes:

AMD Phenom II X4 960T 3 GHz
Ati Radeon HD6750 2GB
8GB DDR3 1333MHz RAM

Or

AMD apu A8 3870K
8GB 1866MHz DDR3 RAM

My budget isn't that high and I'm not a hardcore gamer. What would you suggest?
 

the first one is a lot better.
 
The A8 APU has a much better benchmark then the Phenom II X4 960T without being overclocked. If you do get it make sure to get a motherboard with the FM1 socket and the A75 chip-set. You can usually get great deals by browsing the combo deals on newegg. And although some say that there isn't much performance difference between 1866 RAM and 1600 RAM on the A8, you get a hell of a lot more bandwidth while overclocking the APU. The GPU benefits the most from the higher speed RAM and by looking at the CPU benchmarks I can see that AMD must have purposely under-clocked the unlocked chips expecting the buyer to overclock it for maximum CPU performance.

On the other hand, the 6750 has a much better score then the integrated 6550D. If you plan on gaming you would get much better results with the 6750 but it would end up costing you more. So if you're on a budget then go with the AMD A8 3870K, but if you plan on turning it into a gaming rig then go with the more expensive configuration with the 6750.

If you do any OpenCL programming then I'd suggest the APU instead... Less headaches.
 
no.
 
i have a 3870k running at 3.0 ghz with a sapphire 1 gb 6850 and i run bf3 at max settings at 1920x1080 also mp3 ate max settings at the same res i get no problems what so ever great "apu" not extreme gaming but can pust up a good fight oh and also the better ram the better it runs
 
Your first sentence proves your claim at the beginning of the second sentence is disingenuous. In fact, the last part of the second sentence also proves your claim is a lie. You are being rude.

Honestly, I don't think I've heard a more blindly arrogant statement in a long time.

You should learn how to debate. Making such statements at the beginning of your rebuttal makes the objective non-participants in the forum discount your assertions. Naturally your supporters, people already on your side, will often applaud this kind of condescension, but an impartial judge will score your performance very low.

Nevertheless, your post is inaccurate, therefore wrong because you have shown you do not understand the new computational architecture that is being brought into the APU.

The on-board Northbridge is a thing of the past with AMD's APU. Instructions coming from the GPU are no longer in serial along a PCIe X16 bus going through an on-board NB chip. They are going in parallel along a PCIe x24 bus inside the chip itself and into the four cores of the quad core chips.

So, at the least your numbers are wrong because they assume an older architecture that the APU doesn't use!

This article explains the architecture a little. Interesting that the last diagram matches your "29.8" figure, so I guess you can use calculator properly, but what that doesn't point out is that the diagram is showing only one core. At the very least you can multiply that by four to 119.2 as the article says "an average of four times the bandwidth". This multiplier notwithstanding a 6% increase in x86 instructions per cycle as earlier stated in the article.

But irregardless of the seemingly never-ending "benchmark shows this" and "benchmark shows that" back and forth I too often see on discussion threads like this one, real world proofs exist to show how versatile this new APU architecture really is.

Here's a YouTube video of a guy playing BF3, at medium to high settings at 1280x720 on the 3870K chip alone, OC'd to 3.2Ghz with only 4Gb of RAM.

Here's another video of a guy playing Batman Arkham City at 1600x900 on high settings, again on the 3870K alone, no mention of RAM or OC. Min FPS 28, very playable.

And here's one with a guy playing several games on the chip alone with 16Gb of RAM. He seems to be getting better results with the extra RAM, as the earlier article on the architecture says it would. This new APU seems to actually benefit from more RAM.

And lastly, here's one of a guy playing Bad Company 2 at 1080p with medium to high settings using dual graphics. He's got a 3850, very mildly OC'd and a Radeon HD 6670 card for dual graphics. Awesome performance with a very sweet 50 - 60 FPS!

Please explain how these people are getting these real world results on 29.8Gb/sec.

I'll wait. :hello:

I think AMD is gonna clean house with this new architecture. As was stated before, 90% of the gamers out there are buying systems at computer stores, NOT building their own from parts on-line. And even amongst those that are getting their stuff at NewEgg, a considerable percentage of those will be getting this APU because they are on a budget and want, maybe not a big bang system, but enough bang to suffice, and for one-half or even one-quarter of the cost of those high-end, triple monitor, 100+ FPS systems we all drool over.

Soon you guys that are buying the $340 i7's, which BTW, should already be thanking us AMD hardcore users for the price drops you've already gotten from Intel, and are pairing those up with $1000 GTX690 GPU's, will be (or should be) thanking us again for further price drops when Intel and nVidia feel the pinch when their sales drop off.

In a year or two, just like the last time AMD introduced a game changer, the Athlon 64 x2. By December 2006 when the Brisbane's were released, AMD pwned the enthusiast market with the best CPU in the business. I remember well how the Intel shills were lamenting, "Just wait until Intel comes out with the Core 2 Duo next year, then you'll be sorry!"

I'm typing this post on a Brisbane 5000 now. Anybody out there still struggling along with that POS C2D?

😗
 
intel are best their life span is more than amd intel have more technology i buy a intel pentium 4 in year 2001 it was running well but my motherboard was dead its just opposite with my friend he buys a amd phenom x2 in 2008 it is just dead so just buy intel you will not get any complaint so buy it and live happy
 
just buy new gpu inbuilt gpu takes you system ram if you buy a new gpu turn off the igpu your processor will work fast
 
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