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need some advice on A6 3670k vs 5400k

post #1 of 6
Thread Starter 
I am building a HTPC with light gaming ( lol)

looking at A6 3670k vs 5400k
I know 3670k is quad and 5400k is a dual.
I have also heard 5400k has better graphic and faster core speed?

Any advice from these 2?
post #2 of 6
It's a pretty late reply but i'm new here. i'll write this for those who have the same question and stumble upon this from google searching.

I can't answer the question "3670K vs 5400K, Which one is better?" But i can tell you what i have learned from having the same question as you.

The first thing to note is the 3670K uses the FM1 socket but AMD has already moved onto the FM2 socket for APU processors so it is essentially a dead socket so you will have no upgrade paths if you chose this processor and a FM1 motherboard.

The 3670K has 4 physical cores while the 5400K has 2 cores according to AMD (2 logical cores, 1 physical core)

In terms of the processor itself the 3670K is only clocked at 2.7Ghz and has a passmark score of 3446 while the 5400K clocked at 3.6Ghz has a score of 2163 despite the much higher clock speed but i think that's because the bench marking program takes advantage of all 4 cores of the 3670K so this increase of score on the benchmark program might not translate into a performance increase in games.


The 7540D graphics on the 5400K get's a passmark score of 666 while the 6530D of the 3670K get's a score of 520. It's not huge but it would be slightly noticeable.


FM2 3.6Ghz AMD A6-5400K 2 CORE 1MB L2 CACHE - CPU SCORE: 2163/GPU SCORE: 666
FM1 2.7Ghz AMD A6-3670K 4 CORE 4MB L2 CACHE - CPU SCORE: 3446/GPU SCORE: 520


Conclusion: In my opinion neither of these APU processors have a place in a gaming rig. In order to play demanding games you would need a dedicated video card but the relatively weak processor will bottleneck a higher end graphics card and buying a video card (unless it's like a 6670 and crossfired with the APU graphics) Would defeat the entire purpose of having a CPU+GPU on one chip.

BUT if you are on a tight budget and have a very old PC or no PC at all and you just play games like league of legends, World of Warcraft, Minecraft ect i do believe a APU would fit your needs quite well.
Edited by Soul Craze - 1/8/13 at 7:06pm
post #3 of 6
go with the 5400K, newer instructions sets, newer socket. You will have the option to drop in a steamroller later.
Note that one is a 100 watts the other is 65 watts if power matters to you.

http://www.amd.com/us/products/technologies/dual-graphics/pages/dual-graphics.aspx#3 < crossfire list for APU's

5400K can crossfire with a 6570.
    
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post #4 of 6
Quote:
Originally Posted by Demonkev666 View Post

go with the 5400K, newer instructions sets, newer socket. You will have the option to drop in a steamroller later.
Note that one is a 100 watts the other is 65 watts if power matters to you.
http://www.amd.com/us/products/technologies/dual-graphics/pages/dual-graphics.aspx#3 < crossfire list for APU's
5400K can crossfire with a 6570.

What do you think about the 5400K having 1 physical core apposed to the 3670K 4 physical cores though? the 5400K clock speed is crazy high but the numbers it's putting out seem pretty disappointing.

On top of that the 5400K has only 1MB L2 cache the 3670K has 4MB L2 cache.
Edited by Soul Craze - 1/8/13 at 7:05pm
post #5 of 6
its IPC. Not everything is about frequency of cpu. But how much it can do in each cycle.
Uhm think about carrying milk upstairs maybe u can run 25% faster but if u carry 1 bottle of milk each time u do less then u re grandpa who goes slower but carrys 4 milks in a bag up and down. Its kind of like how much u can carry as oppose to how many more runs u do cuz u re bit faster.

U compare 3670 and 5400 but u can also find easy to compare 3870k stock @ 3GHz vs 5800k stock 3.8-4.2(turbo) GHz. 5800 isnt at all fater as u would expect from 800-1200 MHz more(almost 30%). In fact its slower is some single threaded tasks and mostly about even. I use this example cuz u can easily find those 2 and compare.

So 3670k is, CPU wise, faster in cpu tasks. 5400 would have little faster graphics. Ofc its fm1 (dead socket, no more new cpus) vs fm2
post #6 of 6
Quote:
Originally Posted by Soul Craze View Post

What do you think about the 5400K having 1 physical core apposed to the 3670K 4 physical cores though? the 5400K clock speed is crazy high but the numbers it's putting out seem pretty disappointing.

On top of that the 5400K has only 1MB L2 cache the 3670K has 4MB L2 cache.

Well first of it's not a single core and I don't think like it is one. It's not one core.

It's two cores that share the front end.
The Fetch is only single to the module front end, the retire/execute is dual.

The sharing front end isn't as bad a the original FX was I've have an FX 8120 which showed it's shared front end problem, when two cores in use. Where slowed down by 32% at most. Trinity cores don't show this big a difference anymore.

Cache wise, less would probably end being better for the Design of the new architecture, Cache misses go back to main memory for congruency. Having to go threw a large L2 cache and L3 cache would only make the latency rise, and makes the misses even worse.
    
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