maximum bandwidth of ram

silverwolf82587 · 05-12-2005, 06:11 PM

i understand memory bandwidth...

(my pc - 512 MB value)
pc3200 would be maximum 3200 MB/s or 3.2 GB/s
sisandra reports maximum bus bandwidth to be 3200 MB/s
i overclocked my memory to 436mhz from the stock 400
sisandra reports maximum bus bandwidth to be 3488 MB/s

(Bros pc - 2x 512 MB dual channel value)
sisandra reports maximum bus bandwidth to be 3216 MB/s

(friends pc - 2x 512 MB dual channel corsair xms)
sisandra reports maximum bus bandwidth to be 6400 MB/s

my question is this:

wouldnt the bandwidth be the same on value or great ram?
because it is pc3200 ram...

i dont understand why it says 6400 MB/s
that would be like pc6400 or around...

plz help me to understand why these are so different...
does dual channel increase maximum memory bandwidth?

**Sarkast** · 05-12-2005, 06:46 PM

Yes theoretical maximum bandwidth is doubled for dual channel memory mode (thats the point of it) - so the reported 6400MB are normal. I have the same value reported on my board.

So it seems for some reason your "bros" PC is not using dual channel correctly. What motherboard and CPU is he using ?

silverwolf82587 · 05-12-2005, 07:42 PM

thats weird...

all that i know is that his mobo is an abit...

however i know his ram...

the one stick is PNY value PC2700 and the other is Viking value PC2700 they are overclocked to 3200

when it posts it says dual channel...

ill try to get the exact model of his mobo for u...

thanx.

silverwolf82587 · 05-12-2005, 08:16 PM

the model of his mobo is Abit NF7

**Sarkast** · 05-12-2005, 08:45 PM

What CPU is on that NF7 and what CPU is in your friends PC ?

silverwolf82587 · 05-12-2005, 09:04 PM

my bro has a athlon xp mobile 2400 and my friend has athlon xp mobile 2600

both are overclocked to around 2.41 ghz...

05-12-2005, 06:11 PM	#1 (permalink)
silverwolf82587 Registered User Join Date: Jul 2004 Location: States Posts: 207 OS: Win XP Pro SP 2 My System	maximum bandwidth of ram i understand memory bandwidth... (my pc - 512 MB value) pc3200 would be maximum 3200 MB/s or 3.2 GB/s sisandra reports maximum bus bandwidth to be 3200 MB/s i overclocked my memory to 436mhz from the stock 400 sisandra reports maximum bus bandwidth to be 3488 MB/s (Bros pc - 2x 512 MB dual channel value) sisandra reports maximum bus bandwidth to be 3216 MB/s (friends pc - 2x 512 MB dual channel corsair xms) sisandra reports maximum bus bandwidth to be 6400 MB/s my question is this: wouldnt the bandwidth be the same on value or great ram? because it is pc3200 ram... i dont understand why it says 6400 MB/s that would be like pc6400 or around... plz help me to understand why these are so different... does dual channel increase maximum memory bandwidth?

05-12-2005, 06:46 PM	#2 (permalink)
Sarkast TSF Enthusiast Join Date: Sep 2004 Location: NY Posts: 2,715 OS: WinXP	Yes theoretical maximum bandwidth is doubled for dual channel memory mode (thats the point of it) - so the reported 6400MB are normal. I have the same value reported on my board. So it seems for some reason your "bros" PC is not using dual channel correctly. What motherboard and CPU is he using ? __________________ P4 2.4@2.9 / XP-90 / Albatron PX865PE Pro V2.0 / Kingston Hyper-X 512MB Dual Channel CL2-2-2-5 / Geforce4 MX440x8 64MB / WD80GB 7200RPM 8MB / Thermaltake 420W PSU --> SEE IT ALL GLOW <-- MBM5 - SpeedFan - PSU Calculator - MemTest86 - ThrottleWatch

05-12-2005, 08:45 PM	#5 (permalink)
Sarkast TSF Enthusiast Join Date: Sep 2004 Location: NY Posts: 2,715 OS: WinXP	What CPU is on that NF7 and what CPU is in your friends PC ? __________________ P4 2.4@2.9 / XP-90 / Albatron PX865PE Pro V2.0 / Kingston Hyper-X 512MB Dual Channel CL2-2-2-5 / Geforce4 MX440x8 64MB / WD80GB 7200RPM 8MB / Thermaltake 420W PSU --> SEE IT ALL GLOW <-- MBM5 - SpeedFan - PSU Calculator - MemTest86 - ThrottleWatch

05-12-2005, 09:04 PM	#6 (permalink)
silverwolf82587 Registered User Join Date: Jul 2004 Location: States Posts: 207 OS: Win XP Pro SP 2 My System	my bro has a athlon xp mobile 2400 and my friend has athlon xp mobile 2600 both are overclocked to around 2.41 ghz... Last edited by silverwolf82587; 05-12-2005 at 09:05 PM.

05-12-2005, 07:42 PM	#3 (permalink)
silverwolf82587 Registered User Join Date: Jul 2004 Location: States Posts: 207 OS: Win XP Pro SP 2 My System	thats weird... all that i know is that his mobo is an abit... however i know his ram... the one stick is PNY value PC2700 and the other is Viking value PC2700 they are overclocked to 3200 when it posts it says dual channel... ill try to get the exact model of his mobo for u... thanx.

05-12-2005, 08:16 PM	#4 (permalink)
silverwolf82587 Registered User Join Date: Jul 2004 Location: States Posts: 207 OS: Win XP Pro SP 2 My System	the model of his mobo is Abit NF7