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#1
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What's the difference between these two memories ?
https://www.kabum.com.br/produto/507...d-hx318c10fr-4
https://www.kabum.com.br/produto/507...k-hx318c10fb-4 Other than the price ? I downloaded the Kingston specs https://cdn.cnetcontent.com/07/e9/07...f10cf84f67.pdf Which says: Latency CL9-11 Voltage 1.35V, 1.5V It does not help at all in knowing if I can add a stick or two. My current memory is KHX1866C10D3/4G Number of banks 8 Nominal Voltage 1.50 Volts (CPU-Z output) TIA []'s -- Don't be evil - Google 2004 We have a new policy - Google 2012 |
#2
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What's the difference between these two memories ?
Shadow wrote:
https://www.kabum.com.br/produto/507...d-hx318c10fr-4 https://www.kabum.com.br/produto/507...k-hx318c10fb-4 Other than the price ? I downloaded the Kingston specs https://cdn.cnetcontent.com/07/e9/07...f10cf84f67.pdf Which says: Latency CL9-11 Voltage 1.35V, 1.5V It does not help at all in knowing if I can add a stick or two. My current memory is KHX1866C10D3/4G Number of banks 8 Nominal Voltage 1.50 Volts (CPU-Z output) TIA []'s Kingston has specs right on their own web site. 50758 HX318C10FR/4 CAS10 1866 1.35V RS220 50759 HX318C10FB/4 CAS10 1866 1.5V RS247 The available information only lists 1.5V products. https://www.kingston.com/dataSheets/HX318C10FR_4.pdf The article here suggests the heat spreader color is for "taste" in PC construction. Four colors are available in all. The heat spreader color is not intended as a voltage indicator. https://www.kingston.com/en/company/press/article/7141 If your retailer is to be believed, then I would select the 1.5V product to match the 1.5V product I already have. Someone had a problem with this very thing in a post about two days ago. System had two 1.5V DIMMs, poster added two 1.35V DIMMs. The 1.35V DIMMs (DDR3L) are supposed to work in 1.5V system, and that's why the keying on the edgecard of the DIMM allows insertion. However, the system of the poster would not work. CH0 CH1 Note: all DIMMs are 4GB 1.5V ---- 1.5V ---- (Dual channel mode) Failed to POST... 1.35V ---- 1.35V ---- For reasons known only to the BIOS logic, this worked. CH0 CH1 1.5V ---- 1.35V ---- (Dual channel mode) Works... 1.5V ---- 1.35V ---- Both of these setups run *all* slots at 1.5V. The sticks are never "treated as individuals". The way RAM works, is the environment of all DIMMs is the same. They receive the Column Address Strobe (CAS) on the same cycle. They receive the same clock frequency. They receive the same voltage for their power source. Since the DIMMs are on shared buses and the memory controller for both channels comes from the same chip, there is an incentive to make all operating conditions identical. Why inserting the DIMMs as in the second diagram works, is a mystery. Since the DIMMs are all 4GB ones of equivalent construction, it allows some flexibility in mixing. The dual channel works in both situations. The system is still in dual channel mode after the change. A question you would have to ask, is whether the 1.5V RAM you "boost" to 1.65V, whether a 1.35V RAM can also be boosted to 1.65V. If you do select the 1.35V RAM, I would do so only for a system which does not have a high boost for VDimm. As I don't know the extent of the "tolerance" on the 1.35V DDR3L. The 1.35V stuff is readily available, and Kingston has resorted to "cherry picking" on the DRAM market. While the spec sheet says 1.5V, Kingston refuses to make a separate SKU for 1.35V in this case. Kingston did something similar a few years back, mixing high density and low density DIMMs under the same SKU, in violation of their datasheet. (The datasheet might show double-sided DIMMs, but the blister packs of memory had single-sided DIMMs in some packages and double-sided DIMMs in other packages. This caused *grief* for people seeking low density RAM, which is what the product was intended for.) As far as I know, if 1.35V RAM is on a DIMM, the SPD EEPROM must have an encoding for it. Consequently, if those two products are for real on your retailer site, they likely do not have identical SPD contents when you examine them in CPUZ SPD table. This could be what is causing the BIOS to fail to set up some configurations of the mixed RAM. The BIOS was not programmed to accept "variation" in that field of the SPD EEPROM. The general rule of thumb for memory is, to mix "like with like". Don't mix server ram with "enthusiast overclocker RAM" as the latter needs too much voltage for stability. If you start with server ram at stock voltage, your upgrade to the system should also be server class RAM (which runs at JEDEC voltage, not boosted voltage). If you need to save a few bucks by buying the 1.35V RAM, you can. But be prepared for the system to black screen and not POST properly. You may have to send the RAM back, if your BIOS does not like it. There is no way to know in advance, whether the BIOS is ready for it. It's also possible, if the motherboard has a BIOS upgrade, that the BIOS could be modified to "ignore" the voltage field. And then any configuration of DIMMs would work with less trouble than the above example. HTH, Paul |
#3
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What's the difference between these two memories ?
On Tue, 11 Dec 2018 09:43:56 -0500, Paul
wrote: Shadow wrote: https://www.kabum.com.br/produto/507...d-hx318c10fr-4 https://www.kabum.com.br/produto/507...k-hx318c10fb-4 Other than the price ? I downloaded the Kingston specs https://cdn.cnetcontent.com/07/e9/07...f10cf84f67.pdf Which says: Latency CL9-11 Voltage 1.35V, 1.5V It does not help at all in knowing if I can add a stick or two. My current memory is KHX1866C10D3/4G Number of banks 8 Nominal Voltage 1.50 Volts (CPU-Z output) TIA []'s Kingston has specs right on their own web site. 50758 HX318C10FR/4 CAS10 1866 1.35V RS220 50759 HX318C10FB/4 CAS10 1866 1.5V RS247 The available information only lists 1.5V products. https://www.kingston.com/dataSheets/HX318C10FR_4.pdf Exactly the same as https://www.kingston.com/dataSheets/HX318C10FB_4.pdf The article here suggests the heat spreader color is for "taste" in PC construction. Four colors are available in all. The heat spreader color is not intended as a voltage indicator. --- slight cut If you need to save a few bucks by buying the 1.35V RAM, you can. But be prepared for the system to black screen and not POST properly. You may have to send the RAM back, if your BIOS does not like it. There is no way to know in advance, whether the BIOS is ready for it. If it's not 1.5V I can send it back, since that's what they specify on the page. That's the law out here. Características: - Marca: HyperX - Modelo: HX318C10FR/4 Especificações: - Tipo: 240-Pin DDR3 SDRAM - Capacidade: 4GB - Aceleração: DDR3 1866 - Cas Latência: 10 - Tensão: 1.5V --------- It's also possible, if the motherboard has a BIOS upgrade, that the BIOS could be modified to "ignore" the voltage field. And then any configuration of DIMMs would work with less trouble than the above example. HTH, Paul It does. TY for the links and info. I'll go for the cheaper offer. And let you know how it worked out. []'s -- Don't be evil - Google 2004 We have a new policy - Google 2012 |
#4
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What's the difference between these two memories ?
On Tue, 11 Dec 2018 14:45:24 -0200, Shadow wrote:
If it's not 1.5V I can send it back, since that's what they specify on the page. That's the law out here. Was a long time ago, but last time I called Kingston I couldn't believe the red-carpet commitment to satisfied customers. I'd a question regarding a USB flashstick, back when something like a 2 or 4G was a big deal. |
#5
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What's the difference between these two memories ?
On Tue, 11 Dec 2018 13:19:28 -0500, Flasherly
wrote: On Tue, 11 Dec 2018 14:45:24 -0200, Shadow wrote: If it's not 1.5V I can send it back, since that's what they specify on the page. That's the law out here. Was a long time ago, but last time I called Kingston I couldn't believe the red-carpet commitment to satisfied customers. I'd a question regarding a USB flashstick, back when something like a 2 or 4G was a big deal. I have something like 3 days to send it back to the shop, for a full refund. More than that, and it's under Kingston's possibly non-existent warranty. []'s -- Don't be evil - Google 2004 We have a new policy - Google 2012 |
#6
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What's the difference between these two memories ?
On Tue, 11 Dec 2018 16:47:35 -0200, Shadow wrote:
I have something like 3 days to send it back to the shop, for a full refund. More than that, and it's under Kingston's possibly non-existent warranty. Took me longer than 3 days to call for an explanation of why physically formatted sectors might not correspond to a limit of unique file entries I'd falsely presumed FAT capable of storing. Initiate a live chat after preparing those contingencies for possible recourse should any then arise. https://www.kingston.com/en/support |
#7
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What's the difference between these two memories ?
On Tue, 11 Dec 2018 15:05:17 -0500, Flasherly
wrote: On Tue, 11 Dec 2018 16:47:35 -0200, Shadow wrote: I have something like 3 days to send it back to the shop, for a full refund. More than that, and it's under Kingston's possibly non-existent warranty. Took me longer than 3 days to call for an explanation of why physically formatted sectors might not correspond to a limit of unique file entries I'd falsely presumed FAT capable of storing. Initiate a live chat after preparing those contingencies for possible recourse should any then arise. https://www.kingston.com/en/support Nah, I'll just install the modules, run Memtest86 for 6 hours or so, and if it OK's them, keep them. Otherwise, return to the shop. They pay for the postage. []'s -- Don't be evil - Google 2004 We have a new policy - Google 2012 |
#8
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What's the difference between these two memories ?
On Tue, 11 Dec 2018 20:48:45 -0200, Shadow wrote:
Nah, I'll just install the modules, run Memtest86 for 6 hours or so, and if it OK's them, keep them. Otherwise, return to the shop. They pay for the postage. Memory is memory. |
#9
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What's the difference between these two memories ?
On Tue, 11 Dec 2018 23:04:44 -0500, Flasherly
wrote: On Tue, 11 Dec 2018 20:48:45 -0200, Shadow wrote: Nah, I'll just install the modules, run Memtest86 for 6 hours or so, and if it OK's them, keep them. Otherwise, return to the shop. They pay for the postage. Memory is memory. I'll try to remember that. []'s -- Don't be evil - Google 2004 We have a new policy - Google 2012 |
#10
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What's the difference between these two memories ?
On Wed, 12 Dec 2018 07:35:58 -0200, Shadow wrote:
I'll try to remember that. I had 9 chips, 8 banks or rows, of 9 chips to a row. The power would surge: That's closest to a "crash" anybody's going to get, other than a maybe a fly walking into a mess of vacuum tube. Then I'd have to find the chips affected, maybe one, two, sometimes three - each individual DRAM chips with aluminum legs, pulling them out, a row at a time, until a reboot came up to count what was left. Then each vacant row needed to be reseated. The bad RAM was in it if the BIOS indicated it failed a memory count;- each chip then was substituted with a good one, one by one, until it counted. I kept a plastic bag of such, good spare RAM chips. The maddening part: later on down the road, I could run into another "crash, then could pull, from that bag of chips from prior crashes, a substitute that works. That was a single 1 Megabyte computer with 8 banks of sockets for RAM. The cost of the 1 Megabyte RAM: $300US dollars. Next computer was slotted RAM: the first chips slotted on a board to insert into a female slot. Never had any trouble with RAM since. Happy testing. |
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