Problem solved - 2T setting was enabled in BIOS. With it disabled I now get 5895 // 93% efficiency in Sandra.
I'll leave the original post here in case anyone else has the same issue...
As an aside, anyone running Corsair memory in the A8V who is getting 2-3-2-5 timings should change Memclock Mode in BIOS to Manual and then select 2:1 (DDR400) - memory timings then reverts to 2-2-2-5 as per SPD.
BTW, can anyone enlighten me as to what DDR voltage I'm getting with the Auto setting in BIOS?
Thanks.
************
Finally got around to downloading Sandra 2004 to test my new system - principal components: Athlon64 3500, A8V Deluxe (rev 1.2, BIOS 1003), 1024MB Corsair XMS3200 (2-2-2-5), 2 x 34GB WD Raptors in Raid 1 (on VIA Raid controller), GeForce 6800 Ultra.
However, when I run the memory benchmark, I'm getting scores of just over 4900, some 1000 points below the scores benched by Tom's Hardware for a similar setup. Bandwidth efficiency is only 76% apparently. Any suggestions as to why this and what can be done? All motherboard settings are normal/auto, with no overclocking.
SiSoftware Sandra
Benchmark Results
RAM Bandwidth Int Buff'd iSSE2 : 4906MB/s
RAM Bandwidth Float Buff'd iSSE2 : 4903MB/s
Int Buff'd iSSE2 (Integer STREAM) Results Breakdown
Assignment : 4757MB/s
Scaling : 4748MB/s
Addition : 5061MB/s
Triad : 5059MB/s
Data Item Size : 16-bytes
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 77% (estimated)
Float Buff'd iSSE2 (Float STREAM) Results Breakdown
Assignment : 4751MB/s
Scaling : 4749MB/s
Addition : 5060MB/s
Triad : 5052MB/s
Data Item Size : 16-bytes
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 77% (estimated)
Performance Test Status
Run ID : TIM66S on 21 October 2004 at 14:50:47
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 : P0
Page Size : 4kB
Use Large Memory Pages : No
Chipset 1
Model : ASUSTeK Computer Inc K8T880Pro CPU to PCI Bridge
Front Side Bus Speed : 1x 200MHz (200MHz data rate)
In/Out Width : 16-bit / 16-bit
Maximum Bus Bandwidth : 800MB/s (estimated)
Logical/Chipset 1 Memory Banks
Chipset 2
Model : Advanced Micro Devices (AMD) Athlon 64 / Opteron HyperTransport Technology Configuration
Front Side Bus Speed : 2x 1000MHz (2000MHz data rate)
In/Out Width : 16-bit / 16-bit
Maximum Bus Bandwidth : 8000MB/s (estimated)
Logical/Chipset 2 Memory Banks
Bank 0 : 512MB DDR-SDRAM 2.0-2-2-2CL 2CMD
Bank 1 : 512MB DDR-SDRAM 2.0-2-2-2CL 2CMD
Channels : 1
Speed : 2x 200MHz (400MHz data rate)
Width : 128-bit
Maximum Memory Bus Bandwidth : 6400MB/s (estimated)
Features
(W)MMX Technology : Yes
SSE Technology : Yes
SSE2 Technology : Yes
SSE3 Technology : No
EMMX - Extended MMX Technology : Yes
HTT - Hyper-Threading Technology : No
TextText
I'll leave the original post here in case anyone else has the same issue...
As an aside, anyone running Corsair memory in the A8V who is getting 2-3-2-5 timings should change Memclock Mode in BIOS to Manual and then select 2:1 (DDR400) - memory timings then reverts to 2-2-2-5 as per SPD.
BTW, can anyone enlighten me as to what DDR voltage I'm getting with the Auto setting in BIOS?
Thanks.
************
Finally got around to downloading Sandra 2004 to test my new system - principal components: Athlon64 3500, A8V Deluxe (rev 1.2, BIOS 1003), 1024MB Corsair XMS3200 (2-2-2-5), 2 x 34GB WD Raptors in Raid 1 (on VIA Raid controller), GeForce 6800 Ultra.
However, when I run the memory benchmark, I'm getting scores of just over 4900, some 1000 points below the scores benched by Tom's Hardware for a similar setup. Bandwidth efficiency is only 76% apparently. Any suggestions as to why this and what can be done? All motherboard settings are normal/auto, with no overclocking.
SiSoftware Sandra
Benchmark Results
RAM Bandwidth Int Buff'd iSSE2 : 4906MB/s
RAM Bandwidth Float Buff'd iSSE2 : 4903MB/s
Int Buff'd iSSE2 (Integer STREAM) Results Breakdown
Assignment : 4757MB/s
Scaling : 4748MB/s
Addition : 5061MB/s
Triad : 5059MB/s
Data Item Size : 16-bytes
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 77% (estimated)
Float Buff'd iSSE2 (Float STREAM) Results Breakdown
Assignment : 4751MB/s
Scaling : 4749MB/s
Addition : 5060MB/s
Triad : 5052MB/s
Data Item Size : 16-bytes
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 77% (estimated)
Performance Test Status
Run ID : TIM66S on 21 October 2004 at 14:50:47
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 : P0
Page Size : 4kB
Use Large Memory Pages : No
Chipset 1
Model : ASUSTeK Computer Inc K8T880Pro CPU to PCI Bridge
Front Side Bus Speed : 1x 200MHz (200MHz data rate)
In/Out Width : 16-bit / 16-bit
Maximum Bus Bandwidth : 800MB/s (estimated)
Logical/Chipset 1 Memory Banks
Chipset 2
Model : Advanced Micro Devices (AMD) Athlon 64 / Opteron HyperTransport Technology Configuration
Front Side Bus Speed : 2x 1000MHz (2000MHz data rate)
In/Out Width : 16-bit / 16-bit
Maximum Bus Bandwidth : 8000MB/s (estimated)
Logical/Chipset 2 Memory Banks
Bank 0 : 512MB DDR-SDRAM 2.0-2-2-2CL 2CMD
Bank 1 : 512MB DDR-SDRAM 2.0-2-2-2CL 2CMD
Channels : 1
Speed : 2x 200MHz (400MHz data rate)
Width : 128-bit
Maximum Memory Bus Bandwidth : 6400MB/s (estimated)
Features
(W)MMX Technology : Yes
SSE Technology : Yes
SSE2 Technology : Yes
SSE3 Technology : No
EMMX - Extended MMX Technology : Yes
HTT - Hyper-Threading Technology : No
TextText
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