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| rjisinspired |
| Posted: Jul 14 2011, 12:58 PM |
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Advanced Member
Group: Members
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Joined: 12-October 06
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http://www.videoguys.com/Blog/E/DIY+Update...9b90a3d37a.aspx
According to this site the Sandy Bridge chip is not recommended for video processing. Anyone who has this CPU care to comment? |
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| evropej |
| Posted: Jul 14 2011, 01:40 PM |
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I compared 260 sandybridge with the i7 950 and clock for clock, no difference at all.
The test consisted of complex photoshop tasks and video processing with vdub.
The two things i do a lot of.
Conclusion, no need to upgrade at all.
PS I am sure some noob is going to post some benchmark from the some website which makes sandybridge look 60% faster, waiting... |
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| phaeron |
| Posted: Jul 16 2011, 03:06 AM |
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Virtualdub Developer
Group: Administrator
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The VideoGuys' argument mainly revolves around chipset issues more than anything else, I think. If you're using pro-level hardware or are otherwise doing high-bandwidth I/O for uncompressed or lightly compressed HD, then yeah, I can see the bus and chipset issues biting you in the rear. If you're mainly doing video crunching on the CPU then I think it mainly comes down to the CPU itself.
That having been said, the CPU architecture itself is likely to be a wash for video too, compared to a Core i7. The main addition is the AVX instruction set, which doesn't have much to offer for video since it's floating point only. I expect the future "Haswell" architecture to be much more interesting in this regard since it will bring AVX2.
Another trap to watch out for is dynamic overclocking, which allows CPU cores to overclock automatically based on ability and more importantly temperature. This makes it harder to evaluate chips since you don't know how much each chip can overclock in practice. I have a 1.6GHz quad core in my current laptop which ends up being about comparable to the 2.8GHz Core 2 in my old laptop for single-threaded loads due to this ability.
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| levicki |
| Posted: Nov 4 2011, 11:40 AM |
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As an owner of Core i7-2600K I would like to comment on their claims:
| QUOTE | | 1) Sandy Bridge was intended for Laptops and self contained computers |
Not true.
Sandy Bridge was intended for mainstream -- 8 thead 4 core CPU capable of running at 3.8 GHz on air using miserable stock cooler, and trouncing any previous generation LGA1366 CPU (including 6 core Core-i7 990 Extreme) in every task despite having only 2 channel .vs. 3 channel memory controller is not something I would call "budget gaming" buiding block. It can also be overclocked with good cooling (such as Noctua NH-D14) for extra speed.
Mainboard recall was because of problematic 6Gbps SATA controller. Problem has been fixed before mass production and rare boards that have it most likely also have an addon SATA controller such as Marvel or JMicron to compensate.
| QUOTE | | 2) Integrated graphics is one of the biggest tech nightmares for NLE |
This may have been true few years ago and only if you used cheap 50$ mainboards with overheating southbridge and flakey capacitors. Nowadays integrated GPU can only be considered as a bonus. With Z68 chipset you can use one of or both integrated and discrete GPU, and you can even manage which applications run on which GPU using Lucidlogix Virtu.
| QUOTE | | 3) The P67 chipsets have shared PCIe bandwidth, so each slot does NOT have its own dedicated PCIe lanes. |
It is true that P67 and Z68 chipsets have a limited number of PCI-E lanes.
However, most mainboards list the sharing details in their specifications (at least Asus does for their boards), so you should be able to find a combination that works for you. If you need more than one PCI-E addon card (for example PCI-E RAID controller and some other card such as PCI-E TV tuner or PCI-E sound card) then those chipsets are definitely not for you, but X58 had some limitations too, and I would not recommend it now that X79 chipset with PCI-E 3.0 support and LGA2011 CPUs will be available in 10 days.
This performance comparison of i7-990X and i7-2600K speaks for itself:
http://www.xbitlabs.com/articles/cpu/displ...x_11.html#sect0
Core i7-990X is somewhat faster in Premiere, but at ~3x the price ($1,000 .vs. $320) and up to 86% higher power consumption clock for clock. For other tasks its 6 cores, 3-channel memory controller and the fact that it can also be overclocked cannot compensate for architectural superiority of Sandy Bridge.
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