Tuesday, December 12, 2017
Search
  
Most Popular
Hardware Reviews
PC Parts
Intel Core i7-8700K and Core i5-8400 benchmarks
Intel Core i9-7980XE and Core i9-7960X benchmarks
Crucial BX300 480GB SSD review
WEB Reviews
Seagate Enterprise Capacity 3.5 V.3 4TB SAS 6Gb/s HDD Review
OCZ Vector 256GB SSD Review @ Custom PC Review
Gigabyte F2A85XM-D3H
NZXT Phantom 630
Auvio Bluetooth Portable Speaker Review
Corsair H90 CPU Cooler Review
BIOSTAR Hi-Fi Z77X (Intel Z77) Motherboard Review
Noctua NH-L9i Cooler Review on Technic3D
Breaking News
Google Introduces three New Photo Apps
Apple Confirms Acquisition of Shazam
VESA Defines DisplayHDR Standard for PCs, Laptops and Displays
Microsoft Releases Preview of Quantum Development Kit, Q Sharp Programming Language
Hackers Hit ATM Networks In U.S. and Russian Bank Breaches
Verizon Signs Five-year NFL Streaming Deal
Intel Introduces Cost-optimized Pentium Silver and Intel Celeron Processors
Upcoming Samsung QLED TVs Could Have LG Panels Inside
Home > Hardware Reviews > PC Parts

Monday, April 17, 2006
OCZ PC4000 XTC Platinum Edition 2X1GB

5. Performance Test v5.0

Passmark PerformanceTest is an award winning PC hardware benchmark utility that allows everybody to quickly assess the performance of their computer and compare it to a number of standard 'baseline' computer systems.

Twenty seven standard benchmark tests are available in seven test suites plus there are five advanced testing windows for custom benchmarking. CPU Tests, 2D Graphics Tests, 3D Graphics Tests, Disk Tests, Memory Tests and CD/DVD Tests. In our case we selected the Memory suite Tests.

- Memory Benchmarks

This suite contains a number of tests that exercise the memory sub-system of the computer. (Random Access Memory- RAM)

Memory - Allocate small block
This test measures the time taken to allocate & free small zeroed memory blocks (around 100KB block size)

Memory - Cached
This test measures the time taken to read a small block of memory. The block is small enough to be held entirely in cache (if one is present)

Memory - UnCached
This test measures the time taken to read a large block of memory. The block is too large to be held in cache.

Memory - Write
This test measures the time taken to write information into memory.

- Advanced Memory Benchmark

Memory Speed Per Access Step Size
The first test type, ‘Memory Speed Per Access Step Size’ accesses a large block, of memory in various sized steps. First, it runs through the block of memory sequentially, accessing every value. Next it runs through the same block again, except this time it accesses every second value. On this occasion, it runs through the block twice in order to access the same amount of data as the initial step. Next it runs through the same block again, except this time it accesses every fourth value and so makes four passes. And so on, until a certain maximum step size is reached.

The size of the block of memory used for this test is one quarter the amount of system RAM. The size of the steps varies from 1 (continuous sequential access), to one quarter the size of the block of memory ( i.e. one sixteenth of the system RAM ).

Memory Speed (MB/Sec. per Step Size)
OCZ PC4000 XTC Platinum
Block Read Speed 19.81
Block Write Speed 23.13
Mushkin XP4000 REDLINE
Block Read Speed 19.78
Block Write Speed 23.39
Corsair TwinX2048-4000PT
Block Read Speed 18.70
Block Write Speed 22.79

Memory Speed Per Block Size
When a computer program wants to use a section of memory to store data, it makes a request to Windows for the amount of memory it requires. Windows allocates the memory to the program ( unless system resources are very low ) and returns to the requesting program the address of the first memory slot in the allocated block. It is possible that some programs may request very large amounts of memory. The ‘Memory Speed Per Block Size’ test like the ‘Memory Speed Per Access Step Size’ test, is composed of many steps. During each step of the test, PerformanceTest requests a block of memory and runs through the block measuring the average access time. However on each subsequent step the size of the requested memory is increased, until finally a block close to the size of the system RAM is requested. In this way it is possible to observe the different access speeds for the different sizes of blocks.

Typically it is possible to see very fast memory access for blocks which are small enough to fit entirely into the L2 RAM cache, and slower access times for larger blocks accessed from main RAM. In the case where system resources are low, swapping to the disk may even be required for very large blocks.

Memory Speed (MB/Sec. per Block Size)
OCZ PC4000 XTC Platinum
Block Read Speed 187.59
Block Write Speed 230.02
Mushkin XP4000 REDLINE
Block Read Speed 185.88
Block Write Speed 234.39
Corsair TwinX2048-4000PT
Block Read Speed 172.80
Block Write Speed 215.44

The OCZ memory is one of the fastest around, but as the Passmark tests show, not the fastest. Mushkin Redliners clock up the highest memory marks, although once, OCZ came very close. Of course, speed differences are so small that they might be due to other reasons and not just the performance of the modules themselves.




Get RSS feed Easy Print E-Mail this Message


 
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2017 - All rights reserved -
Privacy policy - Contact Us .