• Is DRAM frequency the same as memory frequency?
    3 replies, posted
Just a simple question. I finally got tired of my Radeon 5770 constantly causing me to get colored and striped screens that lock up my computer (I've done research and a huge number of people have had this issue with these cards. Here's the thread from ATI's offical forums: [url]http://forums.amd.com/game/messageview.cfm?catid=260&threadid=124747[/url]) I called up XFX and told the customer support guy my computer specs and he said that my memory frequency was what was most likely causing the problem, and that I should change it from 668.7 MHz to 1.65.(?) The only available option I see in my BIOS is DRAM frequency with the options of Auto, DDR3-800MHz, DDR3-1066MHz, and DDR3-1333MHz. I'm guessing that DDR3-1066MHz is 1.65, so is that correct selection for changing the memory/DRAM frequency? So I took a shot in the dark and changed it to DRR-1066MHz. Here's the current specs. [IMG]http://i44.tinypic.com/261np1k.png[/IMG] It went from 9-9-9-24 to what you see in the screenshot. Is that going to dramatically affect my pc's performance?
the ram's frequency will actually make a impact, which isn't directly noticeable. the timings aren't off by a whole lot either, so that won't make a big difference as well. so no, i won't say it'll make a dramatic impact on your systems performance.
Do you have an exact log of what that guy told you? That 1.65 thing was probably memory voltage. Although i don't see why ram would cause such problems, unless you've overclocked it. Find the specs (voltage, frequency, timings) for your ram, then set everything the way it's supposed to be. You probably have it configured by spd right now, so you probably aren't getting full performance out of your ram.
[QUOTE=Richard Simmons;21578450]the ram's frequency will actually make a impact, which isn't directly noticeable. the timings aren't off by a whole lot either, so that won't make a big difference as well. so no, i won't say it'll make a dramatic impact on your systems performance.[/QUOTE] System RAM speed should not have an impact on a graphics card having artifacts and weird color glitches. The PCIe bus has a separate clock all onto itself and isn't linked with clock dividers based on any other bus in the system. Most motherboards don't let you even change the PCIe frequency from the standard 100 MHz. I think the tech support person had no idea what they're talking about, as most of the time they don't, especially with all of the phone support being moved to low-wage India call centers that have nothing more than a sheet of paper with common questions and answers to go from. But as for RAM clocks and timings, they have a significant effect on the total memory bandwidth they can produce. I have two sticks of DDR400 from different manufacturers, one has a CAS latency of 3 and has about 750~ MB/s of bandwidth while the other stick has a CAS latency of 1.5 and has a bandwidth of 2200~ MB/s. The same applies for both DDR2 and DDR3 RAM, the lower the timings, the more bandwidth they produce.
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