I hope that this thread is appropriate for this forum.

My machine is an "All in one" system so I cannot directly upgrade as you can do with a conventional "tower" system and in addition I am not very technical or good with fiddly jobs.

My computer is Intel Core2 Duo 2.93 Mhz processor with 4GB RAM running Windows 7.

What I would like to know if making use of the ReadyBoost facility to add more RAM would make any significant difference to my crunching speed. Also how much RAM would you suggest I add and do you recomend any particular brands of RAM stick in particular.

Thanks

Jon

http://en.wikipedia.org/wiki/ReadyBoost

ok your not really adding main memory if that is what your talking about.
and yes if you have a 5400(?) rpm disk drive it will speed things up. but it is using the stick as a fast cache, faster than your harddrive but not as fast as L3 cache or main memory. please read the link and use the spec's. listed as a guide line.

also be sure if you want to remove the stick to use windows safe remove so the cache will be flushed out before you remove it.

now the short answer: yes
long answer see above.

good luck

I tried using an old 256 MB USB stick with ReadyBoost, didn't really notice any performance improvements but did nothing scientific to measure that. However, seems like it didn't work more than it did; Windows would often complain that the device wasn't fast enough for ReadyBoost, or plugged into an "unsupported interface". You would usually have to retest the device a couple of times before it would allow it for use again. I also tried using an SD card in my reader for ReadyBoost, that caused some problems with the computer going totally unresponsive at times.

Understand ReadyBoost and whether it will Speed Up your System

Windows 7 supports Windows ReadyBoost. This feature uses external USB flash drives as a hard disk cache to improve disk read performance. Supported external storage types include USB thumb drives, SD cards, and CF cards. Since ReadyBoost will not provide a performance gain when the primary disk is an SSD, Windows 7 disables ReadyBoost when reading from an SSD drive.

External storage must meet the following requirements:
Capacity of at least 256 MB, with at least 64 kilobytes (K of free space.The 4-GB limit of Windows Vista has been removed.
At least a 2.5 MB/sec throughput for 4-KB random reads
At least a 1.75 MB/sec throughput for 1-MB random writes

The most effective way to determine whether a specific flash drive meets ReadyBoost requirements is to test it. Windows Vista and Windows 7 automatically test removable storage when attached. If a storage device fails the test, Windows will automatically retest the storage on a regular basis.

Some devices will show the phrase “Enhanced for Windows ReadyBoost” on the packaging, which means that Microsoft has tested the device specifically for this feature. If you connect a flash drive that meets these requirements, AutoPlay will provide ReadyBoost as an option.

Alternatively, you can configure ReadyBoost by right-clicking the device in Windows Explorer, clicking Properties, and then clicking the ReadyBoost tab. The only configuration option is to configure the space reserved for the cache. You must reserve at least 256 MB. Larger caches can improve performance, but the ReadyBoost cache cannot be greater than 4 GB on a FAT32 file system or greater than 32 GB on an NTFS file system.

Windows 7 use the Windows SuperFetch algorithm to determine which files should be stored in the cache. SuperFetch monitors files that users access (including system files, application files, and documents) and preloads those files into the ReadyBoost cache. All files in the cache are encrypted using 128-bit AES if the flash storage device is removable, but hardware manufacturers can choose to disable encryption on internal, non-removable ReadyBoost devices. Because the ReadyBoost cache stores a copy of the files, the flash drive can be removed at any point without affecting the computer—Windows will simply read the original files from the disk.

ReadyBoost provides the most significant performance improvement under the following circumstances:
The computer has a slow hard disk drive. Computers with a primary hard disk Windows Experience Index (WEI) subscore lower than 4.0 will see the most significant improvements.
The flash storage provides fast, random, non-sequential reads. Sequential read speed is less important.
The flash storage is connected by a fast bus. Typically, USB memory card readers are not sufficiently fast. However, connecting flash memory to an internal memory card reader might provide sufficient performance.


Computers with fast hard disks (such as 7,200- or 10,000-RPM disks) might realize minimal performance gains because of the already high disk I/O. ReadyBoost will read files from the cache only when doing so will improve performance. Hard disks outperform flash drives during sequential reads, but flash drives are faster during non-sequential reads (because of the latency caused when the drive head must move to a different disk sector).Therefore, ReadyBoost reads from the cache only for non-sequential reads.

ReadyBoost creates a disk cache file named ReadyBoost.sfcache in the root of the flash drive. The file is immediately created for the full size of the specified cache. However, Windows will gradually fill the space with cached content.

To monitor ReadyBoost performance, use the System ToolsPerformanceMonitoring ToolsPerformance Monitor tool in the Computer Management console and add the ReadyBoost Cache counters. These counters enable you to monitor how much of the cache is currently being used and when the cache is read from or written to. But it does not tell you exactly what performance benefit you are achieving by using ReadyBoost.