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On-chip video impact on cpu and memory performance

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On-chip video impact on cpu and memory performance

Postby Daniel Drummond » Sat May 19, 2012 9:19 pm

Hi, does using the on-chip video on an intel i7 3770k processor has negative effects on the cpu's performance? Does the on-chip video processes video on its own or does it use regular processor power to work? Does it have an impact on ram memory speed or use? I mean, can I safely use it instead of a dedicated graphics card for professional audio, while retaining all of my processor and memory bandwidth resources?
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Re: On-chip video impact on cpu and memory performance

Postby A. AuCr » Mon May 21, 2012 3:45 am

The Sandy and Ivy Bridge processors have on-chip GPU's. These are fine for 2D graphics, and not horrible for 3D. They work independently of the CPU (well... in conjunction with, really).

Adding a 3rd party graphics card shouldn't meaningfully improve performance in audio applications.

The app should scale screen refreshes anyway, prioritizing audio. When I have my poor Core2Duo processor really cooking, Ableton's screen refresh rate goes way down.
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Re: On-chip video impact on cpu and memory performance

Postby Daniel Drummond » Wed Jun 06, 2012 4:17 am

thanks, but that is quite a generic answer. I'd like to know as precisely as possible, if it is as bad as an onboard graphic or if it is different. Are there any benchmarks comparing performance of audio workstations using on-chip video versus a dedicate graphics card???
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Re: On-chip video impact on cpu and memory performance

Postby Seccione » Wed Jun 06, 2012 3:55 pm

Most integrated GPU's use main memory as vram, so some precious memory bandwidth is lost for displaying image on screen.

Some integrated GPU's doesn't implement all kinds of hardware accelerated transformation calculations, leaving those tasks to CPU. Some of those calculations might be required to draw certain OS/application GUI graphics, so yes, integrated GPU might cause some overhead to CPU, depending on make and model.
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Re: On-chip video impact on cpu and memory performance

Postby robinv » Wed Jun 06, 2012 9:04 pm

Daniel Drummond wrote:thanks, but that is quite a generic answer. I'd like to know as precisely as possible, if it is as bad as an onboard graphic or if it is different. Are there any benchmarks comparing performance of audio workstations using on-chip video versus a dedicate graphics card???

Ivy Bridge graphics technology is pretty amazing and you'll see bugger all difference in terms of audio performance - at least anything measurable in terms of plug-in counts or whatever - i did some comparison testing when Sandy Bridge came out and couldn't measure a difference. It's different to GPU's integrated on motherboards - this really works. You'll probably not find any benchmarks because very few people do those sorts of tests in terms of audio and there's really no need to compare the HD4000 technology to a discrete card because it just kinda works. In some ways a discrete card is worse because it's interrupting the PCI bus and making demands on the processor, whereas the HD4000 is built right into the thick of things. You may lose a small amount of memory but you gain in speed, integration and driver performance. In my opinion unless you need a specialist workstation graphics or need really high frame rates in Crysis or have two old analogue monitors you want to connect up then i'd recommend the internal HD4000 every time.
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Re: On-chip video impact on cpu and memory performance

Postby Daniel Drummond » Sat Jun 09, 2012 8:43 pm

Robinv, that's exactly what I needed to know, right on the spot, thanks! I heard that those on-chip solutions even allow for multiple monitors, so I'll use just that for the new pc I intend to build soon.
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