memory benchmark  | | 
October 18th, 2002, 03:42 PM
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#1 (permalink)
| | Junior Member
Join Date: Oct 2002
Posts: 3
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When I have 2 USB devices plugged to my computer, Sandra memory benchmark drops to 970, when only 1 USB device is plugged it shows 1250, and when I have no USB device attached, my memory benchmark is 1680.
It's an Athlon 1.4 with 2x256 MB PC2100 Crucial RAM on a Gigabyte 7DXR mobo.
Can somebody help me, please?
Thanks in advance. | 
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October 25th, 2002, 05:46 AM
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#2 (permalink)
| | just passin thru
Join Date: Oct 2001 Location: SW, OHIO
Posts: 5,826
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wonder what mine would do ? Hmmm... I have 2 usb devices hooked up. I'll be back. Gonna unplug them and see if it makes a difference...
__________________
P4 3.2 'E', 4GB DDR400, XFX Geforce 6600GT 256MB AGP, MSI 865PE Neo2-P, WD S-ATA II 500GB HDD, Win. Vista
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October 25th, 2002, 05:49 AM
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#3 (permalink)
| | nuisance since 1968
Join Date: Oct 2001 Location: ɐqɟs
Posts: 10,457
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What kind of usb devices? Cameras? Web cams? | |
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October 25th, 2002, 05:57 AM
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#4 (permalink)
| | just passin thru
Join Date: Oct 2001 Location: SW, OHIO
Posts: 5,826
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Unplugging mine didn't make a difference. I have a USB Printer and USB Camera. ?????? | |
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October 27th, 2002, 12:32 PM
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#5 (permalink)
| | Member
Join Date: Oct 2002
Posts: 119
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using the 1.6a @ 2.56ghz at ddr400 and 2usb devices, a usb camera, and usb hub conneccted on the 4g4a+. bench is at 3089/3085 using sandra.
[edit]
i unplugged my usb mouse and all other usb devices and reran the benchmark. no change in the results.
Last edited by nomadman : October 27th, 2002 at 12:35 PM.
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October 27th, 2002, 01:01 PM
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#6 (permalink)
| | Banned
Join Date: Sep 2002 Location: USA
Posts: 106
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I have two USB devices attached to my mac. The memory runs at about 65.7MBps no matter what i do. Ranges from about 64.0-65.9. USB doesnt make a difference. This measurement isnt of how much my total system RAM can move per second- i have 320MB- i think its how much - well you know. . i think. Anyways, i have USB ports because i installed a PCI card- which has some sort of dedicated processor on it. My guess is that you use an integrated USB channel soldered to the board, w/o an I/O controller, so your system controller has to send instructions, using extra CPU cycles and comprimising your RAM because it has to do more than it would've otherwise (the ram i mean). If you have a USB PCI card floating around for some reason try installing that and see what happens. Also if you have two separate USB ... . channels i guess(?) try connecting one USB device to one and the other to the other, or if you're doing that now try plugging both into one. | |
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October 28th, 2002, 11:54 AM
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#7 (permalink)
| | Junior Member
Join Date: Oct 2002
Posts: 3
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2 devices are: a DSL modem (Efficient SpeedStream) and a USB network card (Linksys 10/100). They definitely affect my memory benchmark.
I'll try to use a PCI USB card.
Thanks to everybody that replied. | |
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October 30th, 2002, 11:00 AM
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#8 (permalink)
| | Junior Member
Join Date: Oct 2002
Posts: 3
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PCI to USB card worked! It's stable around 1600 MB/s no matter how many USB devices plugged in.
Thanks all  | |
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