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Will Sandy Bridge be good for emulators mame & etc ?

post #1 of 5
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I was going to get XPS 15 last week but with this whole SB coming out soon I think I'm going to wait.

What I want to know will SB cpus be great for emulators like mame/Dolphin/PCSX2 ?

I had a conroe dualcore a E6850 3.0HGz from a few years ago and when I got a Core i5 also a 3.0 GHz last year even though both cpus were both clocked at 3.0GHz, in emulators it whoopped the E6850 by a good margin.

My question do you think a SB cpu will out do the Core i5 by a good margin also ? Many of you might not know alot about emulators but emulators like mame are very much cpu dependent very litte about gpu.

I don't know alot what makes this SB cpu great. But doesn't what makes this cpu better that it can do even more clocks per instruction at still the same GHz ?

thanks
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post #2 of 5
Since emulators like MAME are very CPU heavy, Sandy Bridge should be perfect. More importantly, you can overclock the SB to higher frequencies so you should gain a good bit of performance in that regard also. If you have the money, I wouldn't hesitate setting up a Sandy Bridge rig combined with Mame x64.
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post #3 of 5
PCSX2 devs are thinking it'll probably work very well for PCSX2, too. I think some of them might be upgrading to Sandy Bridge (from LGA-775).
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post #4 of 5
You know what, I didn't even totally think about this. I totally forgot about PCSX2, it makes me think twice now about getting a 2600K instead of a 2500K now. PCSX2 is quite CPU heavy, the last time I ran it with a C2D it was chewing up my PC playing Contra Shattered Soldier. Maybe I can revive some old PS2 games sitting in the closet.
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post #5 of 5
Quote:
Originally Posted by anoob View Post
You know what, I didn't even totally think about this. I totally forgot about PCSX2, it makes me think twice now about getting a 2600K instead of a 2500K now. PCSX2 is quite CPU heavy, the last time I ran it with a C2D it was chewing up my PC playing Contra Shattered Soldier. Maybe I can revive some old PS2 games sitting in the closet.
Stick to the 2500K. HyperThreading doesn't do jack for PCSX2. I have a Core i5-760 and Core i7-860 and both of them perform the same. There was actually one i5-650 owner who had lower results with HyperThreading enabled as opposed to when it was disabled.

By the way, in case you're interested, here's one of the programmers' take on Bulldozer link:
Quote:
After thought about it, I'll also make note that Bulldozer's threading/core model is very complex, and I fully expect it will take a year for AMD to release kernel drivers for Windows that utilize the chip properly. Complex unbalanced multi-core designs like Bulldozer require fancy thread scheduling logic (based on extra fancy thread behavioral analysis!) in order to make sure everything runs smoothly. This was one of the problems with Intel's initial release of HT on the P4, for example. The operating system didn't schedule it properly initially, and it caused potentially serious performance issues that made HT look really bad (which were later remedied). Bulldozer is essentially a double-dose of HT-style parallel processing, with different strengths and weaknesses.


In all, my synopsis of Bulldozer (based on current pre-release specs) is as follows:

AMD is emphasizing parallel processing over single-thread execution speed, which I'm not a fan of. There are some serious issues with trying to scale software across 8-16 threads efficiently, especially when half to 3/4ths of those threads are getting shafted in the shared cpu and system resources department. Its hard enough for a programmer to schedule parallel tasks to run efficiently and without needing crap-loads of RAM to begin with, without having to worry over whether or not the thread's going to get stuck on a slow half-faked 'core' of the CPU. That sort of thing can muck up the whole chain of dependencies and cause the system to run slower than it would have if it were running less threads in the first place. >_<

Meanwhile, Intel has changed their own tune, and is trying to emphasize "turbo-charged" single thread execution schemes. I firmly believe this is a better strategy, especially for emulators (my own bias), but also for most games as well.

There's simply no substitute for raw single-task execution speed. Multithreading is great in its own ways, but you can not keep throwing more cores at a problem. At a certain point, you'll need a single thread to execute a series of dependent logic as fast as it can, until it can get to the next batch of parallel tasks -- and that's where Intel's i7 turbo boost excels, and where Bulldozer will apparently falter badly (unless AMD plans to have 4-5ghz varieties of these chips, which I highly doubt).
I personally don't think thread scheduling is going to be a problem. However, I really hope Bulldozer will improve single-threaded performance as the Phenom II's are lagging behind Intel majorly on that front.
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