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On Wed, Apr 11, 2012 at 12:30 PM, Volker Armin Hemmann |
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<volkerarmin@××××××××××.com> wrote: |
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> Am Mittwoch, 11. April 2012, 02:11:35 schrieb Walter Dnes: |
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>> On Tue, Apr 10, 2012 at 06:45:55PM +0100, Stroller wrote |
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>> |
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>> > I'm sceptical over the benefits of upgrading a 4 year old PC (short |
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>> > of ripping most all the guts out and starting again). I know the |
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>> > industry has currently settled on PCIe, but haven't bus speeds |
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>> > increased in the last 4 years? Are all the latest cards compatible |
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>> > with your Dell? If not, then you'll probably end up buying an older |
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>> > model, and then that will be sub-optimal when you want to upgrade |
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>> > your motherboard in a year's time. |
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>> |
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>> I've posted a snapshot of the Dell's internals on my ISP's personal |
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>> webspace at http://clients.teksavvy.com/~walterdnes/misc/dell2.jpg Is |
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>> the long black slot PCIe? What's the short black slot? |
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>> |
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>> > I'm sorry if this reply is unhelpful, but you give a lot of information, |
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>> > and perhaps that means you might be open to considering alternative |
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>> > solutions to the core problem. |
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>> |
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>> If it's PCIe, so be it. Actually, a post that prevents me wasting |
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>> money is helpful <G>. Would PCIe be significantly better on the same |
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>> CPU+GPU, or is it hype? |
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> |
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> a lot, lot lot lot better. No hype. |
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One thing worth noting about the difference between PCI and PCIe: |
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PCI typically has all devices on the same bus, or on bridged buses. |
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Traffic from one device at a particular instant means another device |
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can't communicate until that first device is done. That means your PCI |
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video card competes with your PCI hard disk controller and your PCI |
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USB card for bandwidth. Two high-throughput devices like DMA-enabled |
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video cards and disk controllers will get in each others' way. |
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With PCIe, the data channels (called lanes) are electrically distinct; |
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your video card and RAID card both communicate directly with the PCIe |
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controller, and don't have to wait for a clear channel from each other |
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before they can talk. |
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*Logically*, PCIe looks like PCI when you run lspci or similar. At the |
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hardware and electrical levels, though, they're quite different. |
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-- |
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:wq |
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