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Wii U Memory Bandwidth investigated
A great read, most of you probably wont read
notenoughshaders.com
gamingeek
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*crickets*
I have a feeling I'm going to like this game MORE than the old games.
Can't remember, but it is a long game. I think it was 20 something hours.
Just f***ing with ya.
So much BS about Wii U's hardware compared to 360 and PS3.
Completely not comparing it to the next machines. But in relation to 360 and PS3 we had the whole CPU clock speed thing and when it was investigated it was found that the shorter pipeline, out of order execution and large cache as well as offset features like DSPs and I/O etc meant the CPU is about 50% better than Xenos, more so when you factor in the architecture. It would be weak on SIMD but that is handled by GPUs in the modern age and have far more instructions per cycle. It's one of the shortest pipelines you'll ever see for that clock speed.
Then we had the whole memory speed debacle, saying it's half as fast as 360/PS3s, then upon investigatiion its found that U's memory is bi-directional where the PS3/360 can only read or write at half the theoretical speed. Also devs have said the U's bandwidth far exceeds the speed reported in the teardowns, because of the large cpu cache and eDram which brings about huge performance benefits. The whole memory hierachy is different. The article even guesses why some of the launch ports had performance problems.
This is important:
^ I keep trying to read that tech stuff you post, GG, but I understand none of it.
I'm not techie but as I understand it, try to think of a system like plumbing, there is a pipe (pipeline) and everything has to be kept flowing otherwise you get a blockage (a bottleneck).
Wii U's RAM, in hardware tear downs are said to be about 40% slower than the RAM in 360/PS3. No developer has had anything but praise for the memory but a lot of gamers just take the bandwidth number and go into internet rage lulz. The dev in todays article says, just testing the 1GB RAM for games, the speed came up with far higher numbers than what the teardowns showed. Then the Wii U has a different memory hierachy i.e the way it handles memory. If there are 3 people in a chain one is the RAM the other the CPU and video out and the other the edram, Wii U passes information off to the super fast eDram before it is fed through to the video output. It says in the technical documents that the eDram is considered as MEM1, memory 1 so that is the first prioirty link in the chain which then passes off to MEM 2 which is the main RAM.
The article also says that the PS3 and 360 never came close to matching the theoretical RAM speeds, sort of like how Sony once claimed that the PS3 could reach 1.8 teraflops. The article is also saying that the Wii U has a large/good CPU cache.
So in laymans terms, to some extent the slower RAM is mitigated because it's just meant to pass off data into the ultra fast eDram which then goes to the video output and CPU. But also the cache and eDram is supposed to store frequently accessed data so the RAM doesn't have to keep reloading it.
GAF added:
"Xbox 360 also boasts high eDRAM bandwidth figures. Although, as mentioned before, Xbox 360's eDRAM bw figures are tied to ROPs, and sits off the GPU via a much narrower 32 GB/s bridge, which some say is a potential bottleneck. Wii U's eDRAM is expected to be "special" in the sense that sits directly on the GPU, improving the latency and bandwidth for a wide range of GPU processes, and could potentially far exceed the figure of Xbox 360."
Here's what Shinen had to say about it in a different interview:
"When testing our first code on Wii U we were amazed how much we could throw at it without any slowdowns, at that time we even had zero optimizations. The performance problem of hardware nowadays is not clock speed but ram latency. Fortunately Nintendo took great efforts to ensure developers can really work around that typical bottleneck on Wii U. They put a lot of thought on how CPU, GPU, caches and memory controllers work together to amplify your code speed. For instance, with only some tiny changes we were able to optimize certain heavy load parts of the rendering pipeline to 6x of the original speed, and that was even without using any of the extra cores."
Really, nothing to do with Wii U at all then. I wish I had a beard to stroke.
Why is GG speaking an alien language?
I have no idea what you are posting. Showing me is what I want.
Here:
How many Marios per second this pipe can transport? The bandwidth principle.
It comes down to this:
If the Wii U memory was really 43% slower than 360 and PS3 and if the CPU was like half as capable than PS3/360 ports might not even be possible^
The Wii U RAM is also more advanced:
And the memory setup uses the eDram which can potentially feed through data a shitload faster than normal RAM. The question is whether the Wii U's 32mb of eDram is enough for swapping out data from the MEM2 the regular RAM. Since most games are targeting 720p it should be allright. Otherwise you may get bottlenecks.
Also for instance the PS3 RAM is not bidirectional meaning it can read or write at only half the theoretical speed, so in reality the U's real world RAM speed does not suffer in comparison if it's bidirectional.
No, I am mean simply show me games with excellent graphics. I dont care about the specs it is about the product that comes out.
What has that got to do with memory bandwidth speed? Even though Wii U RAM is supposedly half the speed of 360/PS3's there has been no graphical texture or load difference in most cross platform games, there is your evidence bro. I don't need to show you what you already know.
If you want to see what a more advanced GPU and more RAM does for visuals on cross platform games, check out the Digital Foundry Trine 2 head to head and bear in mind that they didn't even get to try the Goblin Menace portion of the game.
EDIT:
Here you go from the DF article just above:
You see, Durango seems to be taking the same approach as Wii U with eDRAM. Also if the Wii U clock speed is "slow" at 1.2 Ghz then why do both of the next gen machines have a 1.6 GHz clock speed? They are 8 core sure but if you are just using clock speed 360 had 3.2ghz X 3, which totals 9.6 GHz. Shows that clock speeds are misleading as the new chips are less power hungry and more efficient.
What the fuck? You have the worst taste in games man. Too Human is one of the worst games I have ever played.
Let's see some games.
The bottom line, Wii U has no games = Wii U sucks right now. I don't care about specs, how it compares to past or future consoles. FUCKING Nintendo give me some games or I'm going to sell this mother fuckers. Not one new game on the Eshop since launch? WTF??? Lamest online I have ever seen ? Wii had more ....
Dude you've been complaining about the Wii U since BEFORE it was out. Why did you even buy it?
All new consoles go through this lack of software...why do you act as if its only the Wii U? The 360 didn't have shit for awhile, the Wii didn't have shit, the PS3 was worse than BOTH, etc.