Patriot Viper III Review: 2x4 GB at DDR3-2400 C10-12-12 1.65 V
by Ian Cutress on November 18, 2013 1:00 PM ESTIGP Compute
One of the touted benefits of Haswell is the compute capability afforded by the IGP. For anyone using DirectCompute or C++ AMP, the compute units of the HD 4600 can be exploited as easily as any discrete GPU, although efficiency might come into question. Shown in some of the benchmarks below, it is faster for some of our computational software to run on the IGP than the CPU (particularly the highly multithreaded scenarios).
Grid Solvers - Explicit Finite Difference on IGP
As before, we test both 2D and 3D explicit finite difference simulations with 2n nodes in each dimension, using OpenMP as the threading operator in single precision. The grid is isotropic and the boundary conditions are sinks. We iterate through a series of grid sizes, and results are shown in terms of ‘million nodes per second’ where the peak value is given in the results – higher is better.
N-Body Simulation on IGP
As with the CPU compute, we run a simulation of 10240 particles of equal mass - the output for this code is in terms of GFLOPs, and the result recorded was the peak GFLOPs value.
Matrix Multiplication on IGP
Matrix Multiplication occurs in a number of mathematical models, and is typically designed to avoid memory accesses where possible and optimize for a number of reads and writes depending on the registers available to each thread or batch of dispatched threads. He we have a crude MatMul implementation, and iterate through a variety of matrix sizes to find the peak speed. Results are given in terms of ‘million nodes per second’ and a higher number is better.
3D Particle Movement on IGP
Similar to our 3DPM Multithreaded test, except we run the fastest of our six movement algorithms with several million threads, each moving a particle in a random direction for a fixed number of steps. Final results are given in million movements per second, and a higher number is better.
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Impulses - Monday, November 18, 2013 - link
Ian has a pretty in depth article on this subject, look back thru the archives.Memory prices haven't increased as much as I thought, if at all... I bought a 1600 4x4GB Patriot kit last year, precisely around this time, it was like $55 or something with a discount (I remember not seeing any better deals around Black Friday). My first exposure to Patriot too but it's worked out well.
hp9000 - Friday, November 22, 2013 - link
I'm not so sure about that, I bought a 32gb 1866 G.Skill Ares kit in December of last year for $109.99 (I'm looking at the invoice) and now the same kit is $283.49 (newegg). That's a huge price increase in my book.IanCutress - Monday, November 18, 2013 - link
You want my memory scaling article on Haswell:http://www.anandtech.com/show/7364/memory-scaling-...
There are 26 different combinations of MHz / CAS there, from 1333 C9 to 3000 C12, representative of many 2x4 GB Hynix MFR kits available to purchase today.
Franzen4Real - Monday, November 18, 2013 - link
Oh great!! Thank You!! Not sure how I missed that in the first place.... Bigtime thanks for all of your time and effort on these tests!!djscrew - Tuesday, November 19, 2013 - link
A (very) basic rule of thumb: 1 Cas Latency = 1 Command Rate = 1 Bump in MHz (1333/1600/1866). With the bump in MHz considered more valuable.dingetje - Monday, November 18, 2013 - link
1.65 volt and higher ?so the haswell memory controller doesnt have a problem with voltage higher than 1.5 or will it get fried eventually ?
IanCutress - Monday, November 18, 2013 - link
Did you used to have Hyper memory on Nehalem by any chance? That combination had issues above 1.75 volts. I have not encountered any issues running memory up to 1.75v on Sandy Bridge, Ivy Bridge or Haswell. All my chips just work. Otherwise 1.65 volt kits wouldn't be selling as well as they do, and overclockers wouldn't be pushing 1.8v on air / 2.0+ volts on liquid nitrogen.dingetje - Tuesday, November 19, 2013 - link
that it runs great i dont doubt....was just wondering wether on the long term the hawell memory controller will have issues (seeing the spec is 1.5)dingetje - Tuesday, November 19, 2013 - link
^haswell (typo)im running a 1.35v (@1.5v) crucial kit myself on haswell by the way
mfenn - Tuesday, November 19, 2013 - link
Yes, because extreme overclockers care so much about longevity. Ian, you should make an effort to get out of the extreme OC and corporate PR echo chambers once and a while. It is really having an effect on the quality of your articles.