Abit NF7-S and dual channel

[incidre]

dual channel features 2 64bit memory controllers. okay. got it.
so what about this "the 128-bit memory controller integrated on chip provides up to 6.4 GB/sec bandwidth for system memory" phrase from abits site?
a fake or what?

my machine:
AMD 2600 (333)
2x 512mb Infineon DDR400 CL3 (Timing by SPD)
Abit NF7-S v2.0
...just transfers 2,2 GB/sec.

dual channel ist probably active because bios says so at startup
i have tried alternate timings and fsb speeds but it makes 100mb/sec difference. one thing i haven't tried is overclocking the cpu fsb to 400.
any ideas?

big thanks

[Google]

[meobius]

are they both in the right slot for Dual channel support?
sounds to me like your stuck in 64bit mode....
try updating the bios as well

[JayDubya]

if u have a cpu w/ a 166 bus, it should overclock to 200 mhz, easily with your 400mhz ddr ram. for the dual channel, make sure the memory sticks in the 1st and 3rd slots. if you do not want to overclock the processor, then you may want to use a divider to run the ram at its stock speed. this can be found in 'soft menu' in the bios. set the divider to 5/6 if u want a 166fsb and memory to run at 400mhz ddr. otherwise, the processor should run at 200mhz fsb pretty easily when voltages are bumped a bit.
_________________
JayDubya aka JW Jay JD ^> ﺵ

[incidre]

"stuck in 64bit mode" indeed, thats the one thing im pretty sure of.
newest bios and nforce drivers are on.
3 slots on my board, tried both combinations 1st&3rd and 2nd&3rd
i have downclocked my rams to 333mhz by setting the FSB/RAM ratio to
3/3 and thats what sandra says:

SiSoftware Sandra

Model : NF7-S/NF7 (nVidia-nForce2)
Version : 2.X

System Memory Controller
Location : Mainboard
Error Correction Capability : None
Number of Memory Slots : 3
Maximum Installable Memory : 1GB
Bank0/1 - A0 : DIMM 512MB
Bank2/3 - A1 : DIMM 512MB
Bank4/5 - A2 : Empty

Chipset 1
Model : Abit Computer Corp nForce2 AGP Controller
Bus(es) : ISA AGP PCI USB FireWire/1394 i2c/SMBus
Front Side Bus Speed : 2x 166MHz (332MHz data rate)
Width : 64-bit

Memory Module(s)
Memory Module 1 : Siemens 64D64320GU5B 011F40E7 512MB 16x(32Mx8) DDR-SDRAM PC3200U (CL0 up to 200MHz) (CL429496729.1 up to 167MHz) (CL429496728.6 up to 34MHz)
Memory Module 2 : Siemens 64D64320GU5B 011F4113 512MB 16x(32Mx8) DDR-SDRAM PC3200U (CL0 up to 200MHz) (CL429496729.1 up to 167MHz) (CL429496728.6 up to 34MHz)
SiSoftware Sandra

Int Buffered aEMMX/aSSE (Integer STREAM) Results Breakdown
Assignment : 2288MB/s
Scaling : 2283MB/s
Addition : 2302MB/s
Triad : 2300MB/s
Data Item Size : 8-bytes
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 86% (estimated)

Float Buffered aEMMX/aSSE (Float STREAM) Results Breakdown
Assignment : 2288MB/s
Scaling : 2306MB/s
Addition : 2149MB/s
Triad : 2130MB/s
Data Item Size : 8-bytes
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 84% (estimated)

Test Status
Memory Used by Test : 512MB
NUMA Support : No
SMP Test : No
Total Test Threads : 1
SMT Test : No
Dynamic MP/MT Load Balance : No
Processor Affinity : No

Chipset 1
Model : Abit Computer Corp nForce2 AGP Controller
Front Side Bus Speed : 2x 166MHz (332MHz data rate)
Width : 64-bit
Maximum Bus Bandwidth : 2656MB/s (estimated)

Logical/Chipset 1 Memory Banks

sorry for the spam

[incidre]

@JayDubya
1st and 3rd slot - check
5/6 ratio - check
dualchannel ddr400 - check
128bit mode - nope, improved performance: 2,3 GB/sek.
thx anyway!

[[TN] Nathan]

Do a memory benchmark with Sandra.
_________________
Owner & Administrator
www.Tweaknews.net
www.Pocketbookpinch.com

[incidre]

SiSoftware Sandra Cache and Memory Test

Float SSE Cache/Memory Results Breakdown
2kB Blocks : 16696MB/s
4kB Blocks : 17722MB/s
8kB Blocks : 18217MB/s
16kB Blocks : 15336MB/s
32kB Blocks : 12732MB/s
64kB Blocks : 11863MB/s
128kB Blocks : 7824MB/s
256kB Blocks : 6398MB/s
512kB Blocks : 1367MB/s
1MB Blocks : 1311MB/s
4MB Blocks : 1298MB/s
16MB Blocks : 1286MB/s
64MB Blocks : 1293MB/s
256MB Blocks : 1292MB/s
Data Item Size : 16-bytes
Buffering Used : No
Offset Displacement Used : Yes

Test Status
NUMA Support : No
SMP Test : No
Total Test Threads : 1
SMT Test : No
Dynamic MP/MT Load Balance : No
Processor Affinity : No

Processor
Model : AMD Athlon(tm) XP 2600+
Speed : 2.08GHz
Model Number : 2600 (estimated)
Performance Rating : PR3015 (estimated)
Type : Standard
Internal Data Cache : 64kB Synchronous Write-Back (2-way, 64 byte line size)
L2 On-board Cache : 256kB ECC Synchronous Write-Back (16-way, 64 byte line size)

Features
SSE Technology : Yes
SSE2 Technology : No
SSE3 Technology : No
EMMX - Extended MMX Technology : Yes
HTT - Hyper-Threading Technology : No

Chipset 1
Model : Abit Computer Corp nForce2 AGP Controller
Front Side Bus Speed : 2x 166MHz (332MHz data rate)
Width : 64-bit
Maximum Bus Bandwidth : 2656MB/s (estimated)

Logical/Chipset 1 Memory Banks

SiSoftware Sandra Memory Bandwith Benchmark

Int Buffered aEMMX/aSSE (Integer STREAM) Results Breakdown
Assignment : 2394MB/s
Scaling : 2386MB/s
Addition : 2335MB/s
Triad : 2349MB/s
Data Item Size : 8-bytes
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 89% (estimated)

Float Buffered aEMMX/aSSE (Float STREAM) Results Breakdown
Assignment : 2393MB/s
Scaling : 2253MB/s
Addition : 2150MB/s
Triad : 2129MB/s
Data Item Size : 8-bytes
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 84% (estimated)

Test Status
Memory Used by Test : 512MB
NUMA Support : No
SMP Test : No
Total Test Threads : 1
SMT Test : No
Dynamic MP/MT Load Balance : No
Processor Affinity : No

Chipset 1
Model : Abit Computer Corp nForce2 AGP Controller
Front Side Bus Speed : 2x 166MHz (332MHz data rate)
Width : 64-bit
Maximum Bus Bandwidth : 2656MB/s (estimated)

Logical/Chipset 1 Memory Banks

Features
MMX Technology : Yes
SSE Technology : Yes
SSE2 Technology : No
SSE3 Technology : No
EMMX - Extended MMX Technology : Yes
HTT - Hyper-Threading Technology : No

again sorry for the spamm

[incidre]

competence award goes to ...

consulted abit tech support on that matter.
all they could give me was a link to tXX'X hardware Nforce2 Ultra 400 benchmark results