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240GB vs 256GB SSD

post #1 of 7
Thread Starter 
How come some SSDs have 256 while others have only 240??

And they are of same price.

Why would anyone buy a drive 16gb less capacity??? What's the advantage of 240 gb dirve?
post #2 of 7
They actually have the same amount of NAND.

However, some companies choose to over-provision to ensure SSD performance.

Basically, even if you have a 256GB SSD... you should never fill it to 256GB. The most you should put on it is around 240-245GB to ensure consistent performance.
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post #3 of 7
Quote:
Originally Posted by DuckieHo View Post

Basically, even if you have a 256GB SSD... you should never fill it to 256GB. The most you should put on it is around 240-245GB to ensure consistent performance.

More like 230GB really (I think the general recommendation is 10-25%). Personally, I try to leave 20% free (based on total NAND capacity) so that's around 100GiB formatted capacity per 128GiB NAND.
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Core i7-860 Biostar TH55B HD MSI GT 240 1GB GDDR5 Kingston 2x2GB DDR3 1333 
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Crucial m4 256 mSATA Samsung 840 500GB Intel BXHTS1155LP Windows 7 Ultimate x64 
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Hard DriveOSPowerCase
G.SKILL Phoenix Pro 120GB Windows 7 Ultimate x64 Silverstone ST45SF 450W Silverstone Sugo SG05B 
CPUMotherboardGraphicsRAM
Core i7-860 Biostar TH55B HD MSI GT 240 1GB GDDR5 Kingston 2x2GB DDR3 1333 
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post #4 of 7
post #5 of 7
Quote:
Originally Posted by rui-no-onna View Post

More like 230GB really (I think the general recommendation is 10-25%). Personally, I try to leave 20% free (based on total NAND capacity) so that's around 100GiB formatted capacity per 128GiB NAND.

It depends on what you're doing with the drive.
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post #6 of 7
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post #7 of 7

Add this to the list:
http://www.anandtech.com/show/6489/playing-with-op

SandForce is a bit of a special case. Thanks to compression, SF SSDs have more spare area to play with. I reckon if Anand had tested the Intel 330 a while longer, we'd see worse performance degradation as the NAND gets filled up.
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Lucifiel
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Intel Core i5-3450S Intel DQ77KB Corsair 16GB DDR3 1600 SO-DIMM Samsung 830 256GB 
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Crucial m4 256 mSATA Samsung 840 500GB Intel BXHTS1155LP Windows 7 Ultimate x64 
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Logitech K800 Lian Li PC-Q05B Logitech M570 
CPUMotherboardGraphicsRAM
Core i7-860 Gigabyte GA-H55N-USB3 EVGA GTX 460 1GB GDDR5 Kingston 2x4GB DDR3 1333 
Hard DriveOSPowerCase
G.SKILL Phoenix Pro 120GB Windows 7 Ultimate x64 Silverstone ST45SF 450W Silverstone Sugo SG05B 
CPUMotherboardGraphicsRAM
Core i7-860 Biostar TH55B HD MSI GT 240 1GB GDDR5 Kingston 2x2GB DDR3 1333 
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Intel X25-M 120GB Windows 7 Ultimate x86 Samsung 22" Antec EA-380D 
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Garnet
(11 items)
 
Lucifiel
(13 items)
 
Metatron
(13 items)
 
CPUMotherboardRAMHard Drive
Intel Core i5-3450S Intel DQ77KB Corsair 16GB DDR3 1600 SO-DIMM Samsung 830 256GB 
Hard DriveHard DriveCoolingOS
Crucial m4 256 mSATA Samsung 840 500GB Intel BXHTS1155LP Windows 7 Ultimate x64 
KeyboardCaseMouse
Logitech K800 Lian Li PC-Q05B Logitech M570 
CPUMotherboardGraphicsRAM
Core i7-860 Gigabyte GA-H55N-USB3 EVGA GTX 460 1GB GDDR5 Kingston 2x4GB DDR3 1333 
Hard DriveOSPowerCase
G.SKILL Phoenix Pro 120GB Windows 7 Ultimate x64 Silverstone ST45SF 450W Silverstone Sugo SG05B 
CPUMotherboardGraphicsRAM
Core i7-860 Biostar TH55B HD MSI GT 240 1GB GDDR5 Kingston 2x2GB DDR3 1333 
Hard DriveOSMonitorPower
Intel X25-M 120GB Windows 7 Ultimate x86 Samsung 22" Antec EA-380D 
Case
Rosewill R101-P-BK 
  hide details  
Reply
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