Samsung Mass Producing Industry's Most Advanced 4 Gb DDR3, Using 20 nm Process

[Arjai]

Please guys, /Flame

Currently, it is all Tilting at Windmills. Let it go, you both may be wrong, then what? He's "Wrong-er?"

 

[Aquinus]

Don't you love it when the trolls come out?

First of, GDDR3, GDDR4, and GDDR5 are all based on DDR3. GDDRx is DDR optimized for bandwidth over latency as opposed to standard DDR3 which tends to prefer lower latency over bandwidth. GPUs needs to read and write large chunks of cohesive memory, which is where the bandwidth optimizations of GDDRx come in handy. CPUs on the other hand tend to work with memory that you might not even know where it is until several instructions before the memory access, which is completely ass-backwards from what GPUs are trying to do.

All in all, in cases like the new Playstation, the APU's iGPU can take advantage of that memory. While the CPU might still run well with it, it might not run optimally with it. In the case of APUs, it's a balancing act.

...the bandwidth constraints at 32GB to page through for execution make it useless with current generation processors, we need faster RAM and a wider bus.

We need lower latency memory, weather or not that is achieve but boosting frequency is anyone's guess. I would rather see timings drop for the same speeds we have now. The bigger bus mostlikely isn't going to help a CPU unless your hammering it with a multi-threaded workload, and even still it needs to be memory-bandwidth or memory-latency bound for any speed improves to memory to really make CPUs any faster.

Most benchmarks have shown that faster memory doesn't yield much improvement for CPUs. For APUs it's a different story, but I'm pretty sure that is only because of the iGPU for the same reasons I mentioned earlier in this post.

 

[Steevo]

The individual chip link training would help with latency.

My comment is the same as what you are saying, we have reached the limit of what 32GB of high speed memory can give us with todays CPU architecture, it takes too long with the higher latency to page through the whole of anything that takes up that much space to utilize the performance of the cores, the number of wait cycles to process that much data is overwhelmingly inefficient, the next logical step then is to move to something that can provide these pages to the CPU faster and unlike our current ideas of serial processing, a move towards more parallel processing where independent workloads are assigned and resources dynamically allocated by the HSA. There is a reason why a little APU can drive 1080 on the PS4, not that I am a console peasant, but I want to know what the real performance of the system as a whole is compared to its closest PC cousin. I bet we would be suprized what it adds to the system.

 

[WaroDaBeast]

Please guys, /Flame

Currently, it is all Tilting at Windmills. Let it go, you both may be wrong, then what? He's "Wrong-er?"

I was neither insulting nor being hostile towards Steevo. Thus, you cannot call it "flaming."

Secondly, I am not claiming to be right. I was merely challenging his claims. Surely that is not prohibited by these forums, their purpose being, after all, discussion.

Actually, I only have superficial knowledge when it comes to computer hardware, so I can hardly make any claims about how it works.

Don't you love it when the trolls come out?

Woah, there. Hold you horses, sir! I am but a jester who does not accept each and every fact I am presented with, without so much as an explanation. I do not think there is anything wrong with that.

-- -- --

Steevo and Aquinus, those last comments were interesting to read. Thanks for shedding some light on the inner workings of memory, guys.

Steevo, I hope you won't hold grudge for my poking fun at the fact that you enjoy giving sarcasm, yet do not seem to take very well to receiving it. I didn't mean to upset you or anything, man.

 

[Steevo]

It takes more than that to upset me. I have one feeling and depending on the time of day or night that feeling is for coffee or beer.

 

[WaroDaBeast]

It takes more than that to upset me. I have one feeling and depending on the time of day or night that feeling is for coffee or beer.

Spoken like a true man. I take my hat off to you, sir.