The Sandy Bridge Preview
by Anand Lal Shimpi on August 27, 2010 2:38 PM ESTPAR2 Multithreaded Archive Recovery Performance
Par2 is an application used for reconstructing downloaded archives. It can generate parity data from a given archive and later use it to recover the archive
Chuchusoft took the source code of par2cmdline 0.4 and parallelized it using Intel’s Threading Building Blocks 2.1. The result is a version of par2cmdline that can spawn multiple threads to repair par2 archives. For this test we took a 708MB archive, corrupted nearly 60MB of it, and used the multithreaded par2cmdline to recover it. The scores reported are the repair and recover time in seconds.
Clock for clock there's very little advantage compared to Lynnfield, but compared to the i7 760 the Sandy Bridge advantage is no less than 35%.
WinRAR - Archive Creation
Our WinRAR test simply takes 300MB of files and compresses them into a single RAR archive using the application's default settings. We're not doing anything exotic here, just looking at the impact of CPU performance on creating an archive:
Without Hyper Threading, the Core i5 2400 equals the performance of the Core i7 880. Turn HT on, and this Sandy Bridge part that may end up costing ~$200 is nearly as fast as the $999 Core i7 980X.
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DrRap - Friday, August 27, 2010 - link
It's Anand "intel" lal Shimpi.Anand Lal Shimpi - Friday, August 27, 2010 - link
I agree that single threaded performance is important to keep in mind. Sandy Bridge had a larger ILP boost than I expected. Final silicon with turbo enabled should address that even more.We got into trouble chasing the ILP train for years. At this point both AMD and Intel are focused on thread level parallelism. I'm not sure that we'll see significant ILP gains from either party for quite a while now.
The socket move is silly, unfortunately there's nothing that can be done about that. AMD takes better care of its existing board owners, that's something we've pointed out in prior reviews (e.g. our Phenom II X6 review).
I'm not sure I'd call Sandy Bridge a kiddie chip however. It looks like it'll deliver great bang for your buck when it launches in Q1 regardless of how threaded your workload is.
Value scatterplots are a great idea, Scott does a wonderful job with them. We're going to eventually integrate pricing data with Bench (www.anandtech.com/bench) which should help you as well :)
Take care,
Anand
ssj4Gogeta - Saturday, August 28, 2010 - link
I'm guessing USB 3.0 support will be introduced later with a chipset upgrade. Why are you so concerned with GHz when Sandy Bridge delivers more IPC? I think having better IPC instead of more GHz is better as you'll get potentially lower power consumption.asmoma - Friday, August 27, 2010 - link
Lets just hope AMD trhows in 80 gpu cores into ontario to bring this SB igp to shame(almost the same performance but less than 10w tdp). And lets also hope they throw in those 400 cores into Llano we have been hearing about.mfago - Friday, August 27, 2010 - link
Any news on OpenCL support? I image Apple may hold off on a purely integrated GPU unless that is supported.Thanks!
Anand Lal Shimpi - Friday, August 27, 2010 - link
Sandy Bridge's GPU does not support OpenCL. This is strictly a graphics play, Intel doesn't have an announced GPU compute strategy outside of what it's doing with Larrabee.Take care,
Anand
DanNeely - Friday, August 27, 2010 - link
Is intel actually still doing anything with Larrabee on the gfx side? I thought they killed it on that end entirely and were looking at it strictly as a compute platform now.Anand Lal Shimpi - Saturday, August 28, 2010 - link
Correct - as of today the only Larrabee parts are for the HPC market. Didn't mean to confuse there :)Take care,
Anand
JonnyDough - Friday, August 27, 2010 - link
"Correction, you'll be able to buy it next year, but you'll get to meet her today."Sandy could be a boy too!
JonnyDough - Friday, August 27, 2010 - link
By the way, is it a an it, or a girl? You can't have it both ways!