Intel Core i5-750 vs 920

[CKPinson]

ok- so I've looked some more and noticed i7 860 is 2 threads per core as is the 920 so what are the key differences here? Different socket means? and is this not DDR3 RAM? and how does that effect "REAL" World performance?

[CKPinson]

UUUUH- saw this at Benchmarkreviews: "For heavy workloads, specifically those that do not take advantage of multi-threading, enabling Intel's (http://benchmarkreviews.com/index.php?option=com_content&task=view&id=361&Itemid=63&limit=1&limitstart=2#) Turbo Boost Technology can have the opposite effect. It effectively overclocks the cores in use by raising the multiplier and voltage of each core independently until the maximum multiplier or TDP is reached. For the Core i5-750, the maximum turbo multiplier is 24, resulting in a maximum turbo speed of 3.2 GHz. However, this is with only one core in use. For each additional core in use, the maximum multiplier is reduced by one. For example, if all four of the i5-750's cores were in use, all four cores would have a maximum turbo multiplier of 21, or 2.79 GHz. We'll examine the performance benefits of Turbo later on in the review."

[aglick]

When used with modern raytracing and reyes based renderers (which is all of the ones you would likely be using), HYPERTHREADING on the new i7 and Xeon 55xx CPUs will increase rendering performance by 15-25%

This is an undisputed and well-proven fact.

There is no doubt that spending a few more dollars for HYPERTHREADING will pay off for you if you do any significant amounts of 3D rendering.

In our testing, the TurboBoost feature (which is unrelated to HYPERTHREADING) helped improve perfromance in small amounts for both rendering and single-threaded tasks.

Adam
BOXXlabs

[Bullit]

Here is a Cinebench R10 chart.


Forgot the source and more data: http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=3634&p=1

[Remoth]

ok- so I've looked some more and noticed i7 860 is 2 threads per core as is the 920 so what are the key differences here? Different socket means? and is this not DDR3 RAM? and how does that effect "REAL" World performance?

The 920 is more for hardcore enthusiasts. It's not any faster than the 860, but its not limited as much in terms of bandwidth and graphics. the i5 750, i7 860, i7 870 are all on socket 1156, while the 920, 940, 950, 965, 975 are all on the 1366 socket. The difference is that the 1366 socket uses Triple channel memory (3 sticks), and can have much higher graphics bandwidth. full quad SLI or Quad Crossfire with all 4 graphics cards getting 16 lanes of bandwidth.

The 1156 uses dual channel memory (2 sticks), and can only have a maximum of 16 lanes of graphics bandwidth. So if you want to use 2 graphics cards, both would only get 8 lanes each. 4 cards is 4 lanes each. these are more for mainstream users, and having more than one graphics card is more of a gamer thing, although that may change in the future.

the 1366 sockets are more expensive, but do have some advantages, although for a home workstation, you wouldn't see much of a difference. Triple channel memory doesnt help as much as you'd think yet, and pretty much all 3d programs dont take advantage of multiple graphics cards anyway. so I would say the 1156 i7 would be the best way to go as the multithreading would really help in rendering. or get the 750 and spent $80 on a better heatsink and overclock it to around 3.8 GHz to get some real speed.

I have the i7 920 and its overclocked to 4.2 GHz and runs like a dream.

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