Digital Foundry hands on with actual PS4 - Some games sub 30fps

[QUOTE="mitu123"]

robotapple is hilarious!XD

lostrib

[QUOTE="lostrib"]

[QUOTE="mitu123"]

robotapple is hilarious!XD

mitu123

sometimes I enjoy perusing the moderation clarification board, just for a quick laugh

Not impressed. 60 fps at 1080p should be standard for most games at this point. Can multiplatform titles hit 60 fps at 1080p on PS4? If so, then there's no reason why exclusives can't either. If games like CoD and Forza could hit it this gen, what's the excuse that PS4 games can't?:?NYrockinlegend

They would have to lower graphics and features if they do like in COD and Froza

[QUOTE="mitu123"]

robotapple is hilarious!XD

lostrib

[QUOTE="NYrockinlegend"]Not impressed. 60 fps at 1080p should be standard for most games at this point. Can multiplatform titles hit 60 fps at 1080p on PS4? If so, then there's no reason why exclusives can't either. If games like CoD and Forza could hit it this gen, what's the excuse that PS4 games can't?:?CroidX

They would have to lower graphics and features if they do like in COD and Froza

[QUOTE="rjdofu"]No matter what, just make it 60FPS please. Ben-Buja

Many devs will still target 30 fps, it's a trend already. If you really care that much about fps you should play on PC where you can play everything in 60+ fps.

[QUOTE="mitu123"]

robotapple is hilarious!XD

lostrib

[QUOTE="Ben-Buja"]

[QUOTE="rjdofu"]No matter what, just make it 60FPS please. rjdofu

Many devs will still target 30 fps, it's a trend already. If you really care that much about fps you should play on PC where you can play everything in 60+ fps.

[QUOTE="greensand24"]

[QUOTE="Esfan13"]I am a software developer. After reading the PS4 specs, I kind of expected this. Sony screwed up last gen with the cell processor and they screwed up this gen by going with a GDDR5 only system. I knew they would have latency problems with the CPU by using this type of memory.I've been laughing seeing all the GDDR5 hype on here. The XBox One is a more balanced, better designed system that will deliver consistent performance. The supposed PS4 performance advantage is paper only.The PS4 developers are going to have to deal with lots of weird timing issues.Higher bandwidth is great for a GPU, but worthless when the higher latency of the GDDR5 makes the CPU constantly have to wait for the memory to return the data it needs and then taking longer to update that memory. Games are not only graphics. You have to have the CPU running the game code to decide what graphics need to be shown. If the CPU is memory starved because of the higher latency, you will get framerate problems.ManatuBeard

*sigh* this again...

GDDR5 chips have the same latency has DDR3 chips. The latency of the memory controllers are different (in a PC environment).

PS4 uses custom memory controllers to solve this issue.

People get confused because they always assume PCs scenarios for comparisons, but a console being a closed circuit made of semi-custom/custom components has certain advantages.

Developers will have more trouble optimizing between DDR3 and eSRAM on the X1 than using a single unified memory bank in the PS4.

If latency was a real issue for memory PCs would still be using DDR2...

Intel CPUs can hide memory latencies better than AMD CPUs i.e. better prefetch and cache structures.

Do you have evidence that shows PS4 has custom memory controller?

AMD GCN has L2 cache linked to memory controllers.

Latencies usually leads to the loss of effective memory bandwidth

AMD Radeon HD 5870 has theoretical 153 GB/s with a 108 GB/s practical i.e. 70.5 percent efficient.

If we apply 70.5 percent efficiency on 176 GB/s, it would yield 124 GB/s.

GDDR5 could waste more clock cycles on latencies but it's high effective clock speed overcomes these issues i.e. GDDR5 is still faster than DDR3. The time taken to start the transaction is more important than clock cycles.