Overclock.net › Forums › Components › Memory › DDR800 Timings
New Posts  All Forums:Forum Nav:

DDR800 Timings

post #1 of 11
Thread Starter 
I bought some DDR800 XMS2 Corsair RAM (2gb) at 4-4-4-12. My cousin bought some of the same kind, but at 5-5-5-12. What kind of performance difference will I notice with the tighter timings?
Primary Box
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6600 @ 3.3ghz Gigabyte EP45-UD3P r1.0 GeForce GX275 Corsair 4gb (4x1gb) TWIN2X2048-6400 Rev 5.1 ProMOS 
Hard DriveOptical DriveOSMonitor
150g Raptor, 2x 1TB Seagate 2x DVD Burners Windows Vista Home Premium 32bit 24" Samsung 245BW + 22" Samsung 225BW LCD 
KeyboardCaseMouseMouse Pad
Logitech G11 TT MozartTX Razer Death Adder Steel Series Large 
  hide details  
Reply
Primary Box
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6600 @ 3.3ghz Gigabyte EP45-UD3P r1.0 GeForce GX275 Corsair 4gb (4x1gb) TWIN2X2048-6400 Rev 5.1 ProMOS 
Hard DriveOptical DriveOSMonitor
150g Raptor, 2x 1TB Seagate 2x DVD Burners Windows Vista Home Premium 32bit 24" Samsung 245BW + 22" Samsung 225BW LCD 
KeyboardCaseMouseMouse Pad
Logitech G11 TT MozartTX Razer Death Adder Steel Series Large 
  hide details  
Reply
post #2 of 11
Not a whole lot. Intels don't care too much about timings. However, I think you should be able to push your RAM up a bit more (like to DDR2 1000 speeds if lucky), while his is more restricted.
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
Reply
post #3 of 11
Both will do about the same thing. The "C4" ram runs 4-4-4-12 At 800mhz with 2.2 vdimm. The "C5" ram runs 5-5-5-12 at 1.9 vdimm but is still warrantied to 2.2 volts so it is very possible that it will run the same speed and timings as the c4 set up to or sligthly higher than stock settings. You might have a little more speed in the c4 set (as Chozart said) for a max fsb speed but I don't think much. I have the C5 set myself and they are running at 667mhz(1:1)/4-4-4-12/1.9vdimm rock stable so far.
Busa's Opti
(13 items)
 
  
CPUMotherboardGraphicsRAM
intel E6700 P5W DH Deluxe Wifi BFG 7800gtx 2g pc6400 4-4-4-12 
Hard DriveOptical DriveOSMonitor
2x WD 74G raptors in raid0 NEC 3520 winXP sp2 Dell 24" widescreen LCD 
KeyboardPowerCaseMouse
Z board w/bf2 keyset Zeus 650sli+450 dual booting UFO Opti1203 blk/UV blue logitech G7 
Mouse Pad
Xtrack "ripper" 
  hide details  
Reply
Busa's Opti
(13 items)
 
  
CPUMotherboardGraphicsRAM
intel E6700 P5W DH Deluxe Wifi BFG 7800gtx 2g pc6400 4-4-4-12 
Hard DriveOptical DriveOSMonitor
2x WD 74G raptors in raid0 NEC 3520 winXP sp2 Dell 24" widescreen LCD 
KeyboardPowerCaseMouse
Z board w/bf2 keyset Zeus 650sli+450 dual booting UFO Opti1203 blk/UV blue logitech G7 
Mouse Pad
Xtrack "ripper" 
  hide details  
Reply
post #4 of 11
Quote:
Originally Posted by busa
Both will do about the same thing. The "C4" ram runs 4-4-4-12 At 800mhz with 2.2 vdimm. The "C5" ram runs 5-5-5-12 at 1.9 vdimm but is still warrantied to 2.2 volts so it is very possible that it will run the same speed and timings as the c4 set up to or sligthly higher than stock settings. You might have a little more speed in the c4 set (as Chozart said) for a max fsb speed but I don't think much. I have the C5 set myself and they are running at 667mhz(1:1)/4-4-4-12/1.9vdimm rock stable so far.
Exactly!

LembasBread;
your CAS 5 could very well run 4-4-4-12 at 800mhz but with a 2.20v or 2.30v. In DDR2, voltage is what matters the most, then latencies and of course speed.
post #5 of 11
Thread Starter 
If memory is operating at 500mhz, does it really matter since my fsb won't be nearly that high? How will that increase performance? Also, could someone explain why voltages are so important on memory?
Primary Box
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6600 @ 3.3ghz Gigabyte EP45-UD3P r1.0 GeForce GX275 Corsair 4gb (4x1gb) TWIN2X2048-6400 Rev 5.1 ProMOS 
Hard DriveOptical DriveOSMonitor
150g Raptor, 2x 1TB Seagate 2x DVD Burners Windows Vista Home Premium 32bit 24" Samsung 245BW + 22" Samsung 225BW LCD 
KeyboardCaseMouseMouse Pad
Logitech G11 TT MozartTX Razer Death Adder Steel Series Large 
  hide details  
Reply
Primary Box
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6600 @ 3.3ghz Gigabyte EP45-UD3P r1.0 GeForce GX275 Corsair 4gb (4x1gb) TWIN2X2048-6400 Rev 5.1 ProMOS 
Hard DriveOptical DriveOSMonitor
150g Raptor, 2x 1TB Seagate 2x DVD Burners Windows Vista Home Premium 32bit 24" Samsung 245BW + 22" Samsung 225BW LCD 
KeyboardCaseMouseMouse Pad
Logitech G11 TT MozartTX Razer Death Adder Steel Series Large 
  hide details  
Reply
post #6 of 11
I have the 6400C4 and currently doing 4,4,3,4,11@1048Mhz with 2.36 vdimm. They might do more but im scared to push vdimm any higher. Voltages help your memory same as your cpu.....your telling it to run faster than its designed to and for that it needs some more juice.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon64x2 4800AM2 2.4Ghz DFI LP NF590 SLI-M2R/G xfx 7900gtx & bfg 7900gtx 2GB Corsair 6400C4Pro 
Hard DriveOSMonitorKeyboard
2 x RaptorX 150 XP home 32 bit Acer 24" LCD AL2423W Saitek Backlit keyboard 
PowerCaseMouse
TT Toughpower 750 Antec Nine Hundred Razer Copperhead 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon64x2 4800AM2 2.4Ghz DFI LP NF590 SLI-M2R/G xfx 7900gtx & bfg 7900gtx 2GB Corsair 6400C4Pro 
Hard DriveOSMonitorKeyboard
2 x RaptorX 150 XP home 32 bit Acer 24" LCD AL2423W Saitek Backlit keyboard 
PowerCaseMouse
TT Toughpower 750 Antec Nine Hundred Razer Copperhead 
  hide details  
Reply
post #7 of 11
Thread Starter 
Yes, but how does making your memory faster when your CPU can't keep up anyways increase actual performance? Is there any benefit to having something other than a 1:1 ratio? If your RAM is already faster than you need it for your CPU, how does OCing it increase your performance since the RAM is already bottlenecked by the CPU?
Primary Box
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6600 @ 3.3ghz Gigabyte EP45-UD3P r1.0 GeForce GX275 Corsair 4gb (4x1gb) TWIN2X2048-6400 Rev 5.1 ProMOS 
Hard DriveOptical DriveOSMonitor
150g Raptor, 2x 1TB Seagate 2x DVD Burners Windows Vista Home Premium 32bit 24" Samsung 245BW + 22" Samsung 225BW LCD 
KeyboardCaseMouseMouse Pad
Logitech G11 TT MozartTX Razer Death Adder Steel Series Large 
  hide details  
Reply
Primary Box
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6600 @ 3.3ghz Gigabyte EP45-UD3P r1.0 GeForce GX275 Corsair 4gb (4x1gb) TWIN2X2048-6400 Rev 5.1 ProMOS 
Hard DriveOptical DriveOSMonitor
150g Raptor, 2x 1TB Seagate 2x DVD Burners Windows Vista Home Premium 32bit 24" Samsung 245BW + 22" Samsung 225BW LCD 
KeyboardCaseMouseMouse Pad
Logitech G11 TT MozartTX Razer Death Adder Steel Series Large 
  hide details  
Reply
post #8 of 11
I'm not sure about intel systems.....I hear DDR2 667 is really all it needs, but on the AMD's the memory controller is on the chip and there is no bottleneck in performance from the memory when your running a divider on it.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon64x2 4800AM2 2.4Ghz DFI LP NF590 SLI-M2R/G xfx 7900gtx & bfg 7900gtx 2GB Corsair 6400C4Pro 
Hard DriveOSMonitorKeyboard
2 x RaptorX 150 XP home 32 bit Acer 24" LCD AL2423W Saitek Backlit keyboard 
PowerCaseMouse
TT Toughpower 750 Antec Nine Hundred Razer Copperhead 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon64x2 4800AM2 2.4Ghz DFI LP NF590 SLI-M2R/G xfx 7900gtx & bfg 7900gtx 2GB Corsair 6400C4Pro 
Hard DriveOSMonitorKeyboard
2 x RaptorX 150 XP home 32 bit Acer 24" LCD AL2423W Saitek Backlit keyboard 
PowerCaseMouse
TT Toughpower 750 Antec Nine Hundred Razer Copperhead 
  hide details  
Reply
post #9 of 11
DDR2 533 runs 1:1 with the CPU for Core 2 Duo. Given the fact that Core 2 Duo overclocks like nuts, and many rigs hit an FSB of 400MHz, DDR2 800 is highly recommended!

When your FSB is 400MHz, DDR2 800 is the actualy RAM speed that's 1:1 with the CPU at that point.

Given that some have even hit over 500MHz (NCSA) with their FSB, it makes sense for those to get even faster RAM to maintain 1:1.
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
KeyboardPowerCaseMouse
N/A Corsair HX520 Coolermaster Cavalier N/A 
Mouse Pad
N/A 
  hide details  
Reply
post #10 of 11
Thread Starter 
I understand that 1:1 is best performance, but people are telling me to get faster RAM than I need. If I am not overclocking past 3.6ghz, why does it matter if I have faster RAM? It won't increase performance if my FSB isn't going past 400.
Primary Box
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6600 @ 3.3ghz Gigabyte EP45-UD3P r1.0 GeForce GX275 Corsair 4gb (4x1gb) TWIN2X2048-6400 Rev 5.1 ProMOS 
Hard DriveOptical DriveOSMonitor
150g Raptor, 2x 1TB Seagate 2x DVD Burners Windows Vista Home Premium 32bit 24" Samsung 245BW + 22" Samsung 225BW LCD 
KeyboardCaseMouseMouse Pad
Logitech G11 TT MozartTX Razer Death Adder Steel Series Large 
  hide details  
Reply
Primary Box
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core 2 Duo E6600 @ 3.3ghz Gigabyte EP45-UD3P r1.0 GeForce GX275 Corsair 4gb (4x1gb) TWIN2X2048-6400 Rev 5.1 ProMOS 
Hard DriveOptical DriveOSMonitor
150g Raptor, 2x 1TB Seagate 2x DVD Burners Windows Vista Home Premium 32bit 24" Samsung 245BW + 22" Samsung 225BW LCD 
KeyboardCaseMouseMouse Pad
Logitech G11 TT MozartTX Razer Death Adder Steel Series Large 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Memory
Overclock.net › Forums › Components › Memory › DDR800 Timings