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post #141 of 349
So FEAR realistically displayes zero difference. This really sucks necause I am just as confused again between chooising high speed or tight timings. Maybe I'll go for the middle option....ddr2-1065 @ 4-4-4-12. Still it most likely wont perform any worse / better than ddr2-1200 / ddr2-800
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post #142 of 349
However, if you run the map load test, you will see an advantage in lower latencies
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post #143 of 349
Quote:
Originally Posted by The_Manual View Post
RAS = Row Access Strobe. This has a latency obviously. It's prime role is to tell the DRAM whether an address is being supplied for a Row.
CAS = Column Access Strobe = Same, but for Columns (More important than RAS).

When a new Row is accessed there will be a RAS to CAS delay. The CAS latency comes next, followed by the Row Precharge, and then continue.

So 800x10^9 cycles = 800000000000 Clock Cycles.

Latency = 5-5-5-10 = 25 cycles?

Not a problem for that latency I think
If what you say is correct, then why dont memory manufactors make DDR2-2000 kits with 10-10-15-40 timings, after all the 1200Mhz gain to todays standard is much more than a few timings (only 57 cycles extra latency than 3-3-3-9). But they dont do this.

I think you are not telling the whole story. So changing the clock speed by 100Mhz increases cycles by 200,000,000,000 (200x10^9), while a latancy decrease of 4-4-4-12 to 3-3-3-9 increases by only 6 cycles!?
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post #144 of 349
Quote:
Originally Posted by The_Manual View Post
I like the structuring of you're article. However there are a magnitude of errors within it



Slight misconseption. Mega states to the Power positive Nine. Therefore the actual cycles accomplished are 800x10^9.
800 Hertz (Cycles Per Second) would give you 800 cycles
This throws you're entire point about the latency's just about out of the window from here on, as they are extremely small.



Technically the principle is correct, yes. However the bandwidth is actually 8528MB/s. This will therefore limit the Memory Data Transfer TO THE CPU to this value. This does not necessarily mean the Memory is limited to this data flow to other components (i.e. In-Direct Transfer to GDR).

The latency timing between the system can not just be stated that simply.

DRAM chips contain grids of memory cells arranged into Rows and Columns. I will skip the workings of memory and go straight onto the latency part.

RAS = Row Access Strobe. This has a latency obviously. It's prime role is to tell the DRAM whether an address is being supplied for a Row.
CAS = Column Access Strobe = Same, but for Columns (More important than RAS).

When a new Row is accessed there will be a RAS to CAS delay. The CAS latency comes next, followed by the Row Precharge, and then continue.

So 800x10^9 cycles = 800000000000 Clock Cycles.

Latency = 5-5-5-10 = 25 cycles?

Not a problem for that latency I think
HEHE How silly of me. Guess that is what vacation does to you.
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post #145 of 349
While a lot of what you say may be true The_Manual. You forget where you are and it seems to me that you are quite caught up in science and miss the reality of the situation. I am an enthusiast gamer, I run these speeds for games, lower voltages, and lower temps. Run higher RAM speeds? Why? How fast do I need to scroll through Excel?

Your misunderstanding is that you are looking at the applications that are not usually set towards home personal enthusiast gaming systems. So your points are rather moot here, as the data processing you are talking about is normally run on multiple processors and mainframe computers. You are completely right in your arguments, but you're making them in the wrong place. You speak of application needs on an enthusiast forum. You are arguing on the wrong platform is all. You say that 3D games do not require memory like mathematical computations... you are correct, but to a gamer, who the heck cares? I bought a $500 video card, and spent a lot more on other periferals to game.

So while your arguments have merit and I acknowledge their correctness on such a platform, this Enthusiast Overclocking Forum very likely has little use or need of such configuring.
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post #146 of 349
Hehe, I just caught your mistake Manual. It isn't x 10^9.... That is Gigahertz. It is x 10^6. Mega is million!
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post #147 of 349
Quote:
Originally Posted by CWell1337 View Post
While a lot of what you say may be true The_Manual. You forget where you are and it seems to me that you are quite caught up in science and miss the reality of the situation. I am an enthusiast gamer, I run these speeds for games, lower voltages, and lower temps. Run higher RAM speeds? Why? How fast do I need to scroll through Excel?

Your misunderstanding is that you are looking at the applications that are not usually set towards home personal enthusiast gaming systems. So your points are rather moot here, as the data processing you are talking about is normally run on multiple processors and mainframe computers. You are completely right in your arguments, but you're making them in the wrong place. You speak of application needs on an enthusiast forum. You are arguing on the wrong platform is all. You say that 3D games do not require memory like mathematical computations... you are correct, but to a gamer, who the heck cares? I bought a $500 video card, and spent a lot more on other periferals to game.

So while your arguments have merit and I acknowledge their correctness on such a platform, this Enthusiast Overclocking Forum very likely has little use or need of such configuring.
That pretty well sums it up for me. I am now convinced that as a hardcore gamer, it is better to stay tighter latency and slower speeds. I've decided to run at 378fsb x 9 = 3400Mhz, memory at 1:1 ratio @ 3-3-3-6 ddr2-756.
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post #148 of 349
Thread Starter 
Looks like the gods hate me. I went to boot my computer and windows will not load after the XP "scrolling" screen. I need to find an XP disk to download or from someone. Anyone have one?
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post #149 of 349
At which memory speed are you trying to boot? Maybe a cmos helps.

Also this review on Kingston HyperX PC2-9600 DDR2 Memory says:

Quote:
Doom 3 confirms that the Kingston memory running at 800MHz with 3-3-3-9-1t timings has better performance, though not by much! Either way you run this kit it has killer performance, but if we had to pick 800MHz 3-3-3-9 1T would be the method of choice.
(Other settings were 1200MHz @ 5-5-5-x)
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post #150 of 349
http://patriotmemory.com/company/new....jsp?source=63
    
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