My ram is not performing the way i think it should

[IfReborn]

my setup
asus p5wdh
e6600
G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400)

just did some sandra bench marks and got:

SiSoftware Sandra

Benchmark Results
RAM Bandwidth Int Buff'd iSSE2 : 5721 MB/s
RAM Bandwidth Float Buff'd iSSE2 : 5702 MB/s
Results Interpretation : Higher index values are better.

Int Buff'd iSSE2 (Integer STREAM) Results Breakdown
Assignment : 5550MB/s
Scaling : 5553MB/s
Addition : 5911MB/s
Triad : 5873MB/s
Data Item Size : 16 byte(s)
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 67% (estimated)

Float Buff'd iSSE2 (Float STREAM) Results Breakdown
Assignment : 5551MB/s
Scaling : 5527MB/s
Addition : 5876MB/s
Triad : 5855MB/s
Data Item Size : 16 byte(s)
Buffering Used : Yes
Offset Displacement Used : Yes
Bandwidth Efficiency : 67% (estimated)

Performance Test Status
Run ID : BOSTONIN-GMTWTX on Tuesday, September 26, 2006 at 4:15:02 PM
Memory Used by Test : 512MB
NUMA Support : No
SMP Test : No
Total Test Threads : 1
Multi-Core Test : Yes
SMT Test : No
Dynamic MP/MT Load Balance : No
Processor Affinity : P0C0T0
System Timer : 2.4GHz
Page Size : 4kB
Use Large Memory Pages : No

Features
(W)MMX Technology : Yes
SSE Technology : Yes
SSE2 Technology : Yes
SSE3 Technology : Yes
SSE4 Technology : Yes
EMMX - Extended MMX Technology : No
3DNow! Technology : No
Extended 3DNow! Technology : No
HTT - Hyper-Threading Technology : No

Chipset 1
Model : ASUSTeK Computer Inc 82975X Memory Controller Hub
Front Side Bus Speed : 4x 267MHz (1068MHz data rate)
Width : 64-bit
Maximum Bus Bandwidth : 8544MB/s (estimated)

Logical/Chipset 1 Memory Banks
Bank 0 : 512MB DDR2-SDRAM 4.0-4-4-12 (tCL-tRCD-tRP-tRAS) CR1
Bank 1 : 512MB DDR2-SDRAM 4.0-4-4-12 (tCL-tRCD-tRP-tRAS) CR1
Bank 4 : 512MB DDR2-SDRAM 4.0-4-4-12 (tCL-tRCD-tRP-tRAS) CR1
Bank 5 : 512MB DDR2-SDRAM 4.0-4-4-12 (tCL-tRCD-tRP-tRAS) CR1
Channels : 2
Speed : 4x 200MHz (800MHz data rate)
Width : 64-bit
Performance Acceleration Technology : Yes
Memory Controller in Processor : No
Maximum Memory Bus Bandwidth : 12800MB/s (estimated)

Performance Tips
Notice 5008 : To change benchmarks, click Options.
Notice 5004 : Synthetic benchmark. May not tally with 'real-life' performance.
Notice 5006 : Only compare the results with ones obtained using the same version!
Tip 2 : Double-click tip or press Enter while a tip is selected for more information about the tip.

The program shows similar DDR2 800 ram cas 5 on the same chipset performing at
int 6754
float 6746

a huge diference on higher latency. whats going on?

 

[IfReborn]

nm figured it out i need to lower the multiplyer and up the buss

 

[Oerekum]

Mind if I take over then? =) I had sort of an odd issue today with my G. Skill memory. It was also 2 x 1Gb, PK series. I was overclocking my cpu (E6600, and p5b deluxe motherboard) to 400 x 8 = 3.2 GHz. Ofc setting the memory to ddr800... which is it's rated speed. But memtest gave me lots of errors. After that I set everything to stock, and the memory to ddr533. No errors. Also; the SPD of this memory says it's rated for 5-5-5-15 on ddr800, whereas on internetstores or wherever I see my own memory, it says 4-4-4-12...

Which is kinda confusing me .. does anyone have a suggestion?

 

[IfReborn]

the spd may be 5-5-5-15 so it can boot at lower voltage?

i have no clue as to what i am talking about just taking a stab at it

 

[Oerekum]

I actually have no clue what kind of voltage is on the memory when set to auto in BIOS. I set it to 1.9, it's rated 1.9-2.0 so bleh .. that should be ok. What bothered me is that it was giving errors when running at rated speeds =I

 

[IfReborn]

I really don?t need to over clock my system.

I guess I dint need such expensive ram :/

 

[stevty2889]

Originally posted by: Oerekum
I actually have no clue what kind of voltage is on the memory when set to auto in BIOS. I set it to 1.9, it's rated 1.9-2.0 so bleh .. that should be ok. What bothered me is that it was giving errors when running at rated speeds =I

Are you sure it's 1.9v to 2v..what I have seen for that mem is 2.0 to 2.1v. If you aren't feeding it the proper voltage it could easily error out at stocks speeds...My PQI 667mhz DDR 2 isn't stable at stock speeds/timings with less than 2v.

 

[Oerekum]

The stickers on the DIMM's even say 1.9-2.0 volts so I guess that's right. Although now that you mention it I've seen them on the G. Skill site with 2.0 tp 2.1 indeed. And on another G. Skill site (euro and US or whatever) they gave 1.9 and 2.0 .. Meh ..I'll just try some higher voltages when I get home, thanks.